Hi back on to the repair for the Sony Rx100 Mark Iv camera. I've done two previous videos, so this is number three. The tldr is that. well, the camera is rooted.

Um, I kinda sorta fixed it in the first video by taking it all apart, putting it back together and it seemed to work for like a day and then came back the next day and it just didn't work again. So at the current state of this thing, uh, I've taken it back apart. I've got a battery in there, which is good. Um, and it doesn't.

It did. The power button just doesn't switch anything on. but if I plug in uh, external battery pack here and I press that, it should come on orange. Yep, sometime later.

So it flashes orange, but it only flashes the orange once when I press that, so I have no idea what that means. I don't have the screen plugged in, so maybe that's it. I don't know, but like, I tried that before and it just didn't work. So anyway, leaving the screen off, that's that connector there because it's really annoying.

Anyway, let's go into the schematic and let's have another crack at this thing, shall we? So we've got the schematic here. This is the uh, power block. Well, this is the like the block system block diagram. There's a more detailed, um.

schematic further down as we saw in the previous video. And if we have a look over here, here's our battery terminal. It's got positive negative. It's got the sense wire, so that's that's battery temp.

I don't you know it's got nothing to do with that. Anyway, our battery unreg comes into here. So it goes through this flex board. Um, and then it comes into System 1052 board which I believe is like the main uh, the main board that we're looking at.

So it's got the processor. Everything. You can see that like it's got a Usb interface chip. It's got a Dc to Dc uh converter chip.

Here there's another chip there I see 8400 front panel control processor. and then we've got the Us, the Ic6000 which is the big chip which we saw on there. Like that. that's the Big daddy there which is not just these pins, it's across multiple Uh sheets and everything.

And as you can see the unregulated battery, it goes into the Usb interface. Yeah, I don't you know. let's follow the money down here, shall we? It goes into the front processor we don't care about. but then we do care about this.

It goes into this voltage detection thing about Eq. It's a transistor. Um, given the designated queue. So a voltage detection and then a charge detection as well.

So if there's something wrong in there then yeah, you'd expect it not to boot up. Um at this time we don't know. I haven't. I have no clue why it like it came good and then didn't work.

Again, I don't know. we could be chasing a red herring down a rabbit hole here. Um but hey I want to at least try and measure the voltage on here, see if the voltage is getting from the battery to that board. So yeah, let's do that.

So Q 3001 so we can find that Q 3001 There it is. I love it. Um, search is good. When these documents are searchable, they're fantastic.

Otherwise it's a real pain. Um, so yeah. it looks like we have a couple of mosfet jobbies here and it doesn't go directly. This is battery unread going in here.

it doesn't go directly in. goes viral one meg and then over. This is Q 3001 over here. so all right and x system reset so I assume like nothing comes from so I don't know.

I haven't traced out the soft switch yet which is the one on the top the soft uh, power button. Maybe maybe I should do that Now there is a bat sense switch here. I don't know. See, there's so many things that you have to trace here.

Like you know, I can think of scenarios just off the top of my head where it could be any one of these different things. I could probably come up with half a dozen different scenarios that would cause it not to like to, you know, not power on like this. But obviously if we feed five volts into the board via the um, uh, external Usb it, uh, you know at least the process is there's voltage on the board the process of the soft power button. it's doing something.

Um, things like that. So yeah, I mean it could be something there. so we can find Q 3000. Anyway, let's just find Q 3001.

Here we go. It's got the overlay, beautiful Sony hats off. That is the bottom side of the board. Yeah, here's the top side.

Here's the top side. Murphy. Of course it's on the bottom side where I can't probe it. Of course I like.

and we've seen how if you try and take this thing out of here, then the ribbon cables pop out and it's just I. It's just no, no, no, it's It's really hard. I was hoping that would be on the top, but of course it's not. Anyway, maybe we can measure something else.

Okay, what's what's I see? 4302 in there Like you know, like, can we at least see that there's voltage getting on the board There Bloody double-sided Loads like this. And yeah. Bga Bgas Bgas up the wazoo. Oops sorry I didn't show you that.

Um yeah, it had the wrong screen switched in. Bga is up the wazoo here. Like Bga over here over here over here like yeah, no thanks. That's a real pain.

and there's a giant one on the bottom as well. I see 6000 is Ic 12 massive thing on the bottom so that wow, that is really a board and a half. I at least want to see if I can probe something on the top. That's what I'm looking for.

I want to see that it gets from the battery through the contacts, through at least onto this Pcb. Otherwise, well, that's why it's not powering up right? So I'm going to rule out probing that transistor on the bottom. What about this thing on the top here? What about Ic 4302? That's looks like it does something important surrounded by the all these inductors and these capacitators. I see 40o.

It's a Pst 8623. sounds like a little regulator jobby and no, it's a reset. Actually, that looks pretty important, doesn't it? That's Reg Unreg. That's the one coming from the battery, isn't it? Yes, Oh no, that's Bat Unreg.

So bat unread goes into here. and then Reg Unreg comes out of this Usb interface chip. Oh okay, so it could be like yeah. Okay, so Reg Unreg goes all the way over here to the Dc to Dc converter and over to here.

There's also a fuse there. It wouldn't be that fuse. Um, because a Usb V bus is obviously coming in. No now I'm thinking that's the like ex like the Usb accessory.

No, because there's another Usb power on down here. Let's see, there's like so many. and then then you've got some diode ore in here for the X power on and the and the X power on accessory. I assume Ack is accessory and then x Usb power on.

and I get like that's all over the shop. See how you can spend hours and hours? even though even when you've got the full schematics like this? Um, yeah, like fear. And as I said, I could figure out a dozen different ways that this could fail. So you've got to, you know it's you got to pick your obvious ones first.

Like things that you can measure easily. Measure them. as simple as that. They'll shall measure voltages unless they're hard.

um, and then yeah. measure the easy ones first. Ah-ha There we go. X Power on.

That's got to be it's on. Off It says on off that's got to be that is the tactile switch. Okay, so we know the tactile switch works. We know the lead under it works because that's like the power it looks like.

is that a jewel lead? Yeah, it's yeah. because they're They're similar proximity. so you know that those leads is probably like a bi-color uh thing. Uh, do you know they've got separate D's on them? But yeah, Um, yeah.

I think it does come up different colors or whatever. So that's the orange lead that we saw before Usb V bus detect, so it was obvious. So when we press the button, it after a couple like three or four seconds or something. then that lead came on right? So we know that all this flex board here is all okay, because this switch goes over to X Power On.

So if we copy and find that right, X Power on? What? Yeah, Okay, so it goes through and then S Triple O one. What's S Triple O one and a depression. Ah uh. I have to think about that a bit more.

Uh, where else does it go? Yeah, it goes down here. Well, X Power on. Uh uh. Piro Hex Power on one experiment.

No, we want. We could probably put a space after that to search for just X Power on because there's X power ons with lots of numbers after them. X Power on Here It is. Yeah, All right.

So that comes through that little diode. All jobby there. Okay, and then we've got a link here and it and that becomes X Power On. Uh, P-i-r-o Whatever that is power.

I don't know. So the switch comes on. it pulls that shocky diode low, and then you can also do that with the X Power accessory. That makes sense.

Okay, so if either of those go low, it switches the camera on so you can remotely switch it on via the external, and then it becomes this. Okay, so we could search for. we could search for C3004. I mean, if that's on the top, right? If that's on the top, we can find that.

except there's another one. Oh no, that's on the No. Okay, so this is the real schematic. The other, as I said, was the, um, like a block diagram kind of thing.

Ah, it's not gonna. Oh there it is. there. It is.

Right up the top there. That's I'm not not, That's on a different board. that's on the bottom board. That's the Sd card board that's useless for us.

That's even more inaccessible than the bottom side of that top board there. So no screw that. All right. So we're back to here again.

Are we? So we're going to follow the money here, and then of course, this will all be fine. I Murphy will guarantee that all this is fine. Um, right. So that that goes hero becomes that becomes so.

X power on Pirro becomes X power on one. Come on, give me a break. Really. Okay, so X power on one.

How did anyone make heads or tails designing this? Wow. Really. X power on one? Okay, I got this. front panel audio processor.

No, we don't give a rats about that. There it is. Again, Okay, So yep. all right.

Yes. Okay, the block diagram showed that better. So we just wasted all our time. Should have believed the block diagram.

So yeah. uh. okay. where's that? Is there Any capacitor? No, that's it.

All right. Okay, Well, that's that. No, that just takes us to the front knight. Like I said, Murphy guaranteed that was a red herring.

I don't know. Well, is this 56 50? Is this findable? Can we do? Can we do this? Because maybe. Oh, it's on the bottom side. No, I see it right down in the corner down there.

Yeah, it's on the bottom side. Yeah, No, that's that's. no good either. Interesting to know what the Bat Sense switch is like.

I didn't know that it detected that the battery was like it had a switch that detected whether or not it's in. Ah, so that sense switch becomes unreg mon. Which then goes into yeah. the audio processor.

What's the audio processor? It's the second time we've seen the audio processor, Isn't it? Oh, what's the deal with the audio processor? Just from a system design point of view, Why would an audio processor like be involved? Front Panel: Oh no. Front Control: Okay, no. so it's front control and an audio processor. They've combined it.

There you go. That's why. Okay, and yes. and here it is.

It takes bat unreg reg unreg Bat Sense switch. It's got everything. backup, Vdd regulator, ground. it's got.

It's got the whole shebang. Wow. Okay, so I see 8400. So where's that? And it's on the bottom.

Of course it's on the bottom. Yep, it's on the bottom. See what's things like You know this? Reset here right? and X, wake and stuff like that like that sounds kind of sort of important, doesn't it? Oh, that's the one on the top. There you go.

Is that one right down there? There you go. So maybe if we start probing around that area, it's gotten to the point where. Yeah, let's just let's just start probing because this is just. this is boring trying to follow the money.

Here's just change the auto range there. Let's just fix it to 10 volts. So we just don't have to dig around with auto arranging because auto ranging can be a bit a bit of a bit of a dick around. You can waste your time doing it.

There you go. 4.26 volts. That sounds an awful lot like the battery voltage. doesn't it? Or battery.

or, uh, 5 volts. Um, minus the uh, Diode Deity drop, right? So there's voltage on that board. There you go. All right.

Well, what I'm going to do? Disconnect that. So there's now no external power. I still don't even know what. Pro: at what point I was probing there.

which pin? I didn't even bother to check. I just started randomly probing. But of course, you expect voltage on the board when there's five volt Usb coming in. Three point nine Tada when you win a chicken dinner, see random.

probing around helps. So there's definitely voltage coming onto the board 3.9. So I know I measured the voltage before. Yeah, it was like 4.15 or something.

4.2 it was. You know it's a fresh battery. Um, it's a reasonably fully charged battery. So yeah, so we're getting voltage onto the board.

No problems whatsoever. Okay, so the battery's all connected. Everything's hunky-dory but that transistory Sony are so nice. They've even put look drain gate source on the overlay.

This is designed for servicing. they've You know they? they went out of their way to do that. That is great. so you didn't have to look up the data sheet of the chip or no know what it is or whatever.

It's just yeah, there was the drain. Okay, there's the gate. Um, that's just. that's absolutely fantastic.

See. But the problem with this fault is that it worked like like we had the exact same fault as we've got. now it wouldn't power it on. We took it apart, we put it back together and it worked.

again. It worked for like a day. You saw it. So this is not like oh yeah, okay, we're We've blown a trendy in here or something.

right? it? It's It's not that you know something's like because it that is the least likely scenario that apart's blowing so I wouldn't go suspect in parts willy-nilly like there was something in the process of taking it apart and putting it back together that made it reset. And of course we speculated that in the previous video about the backup battery and stuff like that. um, causing that sort of problem. I guess.

like can we measure the batter backup battery? I don't think so because it's right down on one of those flexes in there. Uh, we'd have to take it all apart again, but there's definitely voltage getting to the board from that battery. So yeah, and I yeah, I find it. Ha.

I think it's unlikely that a component is just blown. Uh, like that, because otherwise we wouldn't have been able to get it working by putting it back together. It worked fine, and we know why the screen scrolling thing happened. That was, you know, an open pin on the Um Lcd connector when I put it back.

Or you know, some dirt or some other grubby thing on there making bad contact. It was floating. Yeah, so the last thing I'd do is would be sucking parts off here. Um, you just no, no, no, no, no something.

There's something trickier. There's something trickier to this, and it's annoying because it'd be relatively straightforward to troubleshoot this if you can access this. But the physical part about this is that. yeah, just the way it's assembled and everything, and it's just it just makes it really difficult.

But we know it's getting onto the board. So oh boy. Um, so Q4301. So we do know that much.

Okay, so that's a switch after your Vdd out reset thing. so we know that's getting the voltage right. We know that's getting the business. So let's go and have a look.

right? there's the source. The drain is down here, so X Weight is the one that had the voltage on it. Okay, and then to drive that, it has to be driven by this reset switch here. So this symbol here shows that Reg unreg comes in.

This is an in arrow that way, right? So that comes into here. the source. This This transistor must be turned on because we're getting X Weight here. We're getting the voltage.

So reg and reg. you'll find that the source and the drain would be the same voltage. I mean, we can probe that All right. I'm going for a fine art probe, but this time when these are fluke jobbies with the spring-loaded thing.

So let's go in here. Let's remeasure that. 3.93 No Wackers 4.13 It's not. There's some drop on that and our gate 3.76 right? So there you go.

That makes sense when we're measuring the gate. Okay, so we're getting our red reg unreg in here. and then we'll measure in the gate voltage here, right? But that's because our 10 mega ohm input we were reading under because you get the voltage drop between the one Meg gate source resistor here and uh, the gate. So yeah, um, no, that needs to go to ground to.

uh, switch on that mosfet. And the reason that we got the voltage over here? I don't know, but it was lower. Which means that you know if if the transistor was, well, it's obviously not switched on, but if it was switched on, X wake would be pretty darn close to X Reg whereas it was, um, yeah with 3.7 or whatever. so that's that's not it.

But still, I don't even know if I'm chasing the right thing. I'm not sure if that's supposed to be on or not, or when that when this reset thing happens, all I can do is try and probe this at the same time as trying to switch it on. so I need my three hands. The problem is, the power button moves the whole damn thing.

Yeah, it changes just a little smidge. When I push the button, it does something. but um, yeah, it's not obviously not switching that on. so that's you know.

Yeah, it's got nothing to do with it. Really? I don't know. I'm just probing stuff because I can. This is sad, right? So maybe I can measure the Lithium battery, uh, in situ.

So let's give this a go. Bt 900 Lithium Battery Backup Vdd That makes sense. Let's try Backup Vdd. Maybe if Backup V if the battery is dead and backup Vdd is not there, it doesn't power up.

Maybe if the battery dies, it does not power up. And why it came good that day? I don't know. I charged itself because it's not. uh, re rechargeable.

I don't think it's a rechargeable jobby. I think it's just a primary backup Vdd. Here we go. Backup Vdd? Ever Vdd? I mean, how many Ptds and other crap have we got in here? It's unbelievable.

Once again, it's this audio processor chippy, right? That's front front control and audio mode. Front control processor right back up. Vdd. It goes directly.

What's it? What's an Ever Vdd? It's it's Ever. It's always on. It's for forever on. Anyway, D 5100 So one end of D50 100 we can measure.

What are the odds? It's going to be on the top of the board. Bottom of the board. It's Bot. Of course.

it's the bottom of the bloody board. I can't see it in there, but of course it is there. It is. D 5100 right there.

Uh, where where where else does it go? This capacitator here. something. There's got to be a Vr in there, which then pops to the top side. These aren't mirror image are they.

Oh, it's program locked up. I think the program's locked up using the edge browser. I don't normally use edges just because it's like for screen. I only do it for the screen captures and stuff.

Oh geez, come on. now. the whole document's gone. Trying to measure every Vdd.

That's not going to help us because if only if the Diode was in the other direction. so that's not going to help us at all. Backup: Vdd needs to come across here Like I don't want to have to take the thing apart. It's such a pain in the ass.

Don't have to take it apart and physically try and get access to the battery or the ribbon cable for that thing. So I'm trying to do it on the board and I'm probably a glutton for punishment. It doesn't That schematic's wrong. Back up Vdd right there.

There goes into the diode, but the goes into the cathode of the diode. but the other one didn't show that right. It shows that it also goes into the chip, but it doesn't look. Backup: Vdd also goes into Ic8400 and according to the actual schematic, Oh, it does not.

Right, That means it goes in. No, No, no, No, that's it. It should. This shows the Ic.

It doesn't show the sheet for the Ic. It's not like it's going into the page, right? It shows it going into the processor and it doesn't. According to the actual schematic, it goes nowhere. so that doesn't make sense.

That does not make sense at all. Why would a backup battery go into a reversed biased diode like that? That makes no sense. Now It makes sense that this ever Vdd would then Diode Or no. it.

No, even that doesn't make sense. because if that power is through there like that, then it. It's going to charge the battery and I don't think it's a rechargeable jobby. There's no other info on it.

There's no part number or anything like that, but it's got to be a primary. And it did that. Yeah, that. That schematic makes no sense.

Aha. Backup: Vdd also goes through Ah 101 a 220 Ohm Jobby, right? That's interesting, right? So Backup Vdd Yeah, we've seen that. Uh oh. okay.

C84, There you go. C8414. Okay, so C8414 that Rtc ground real time clock because that's that's what the backup battery is for. Basically is like the real-time clock.

So yeah, so if we can measure across C8414 which of course will be on the bottom of the board, course, it will anyway. Or we can measure. Um yeah, we've already looked for. Uh yes.

8414. Yes, we have. We have looked at that before, haven't we? Yes, Yes, yes we have. So r0101 Come on, come on.

No, it's on the bottom. Of course, it's on the bottom. Oh, that. That makes sense.

And that is. That is the secret ribbon cable, Isn't it? That's the secret ribbon cable. Okay, yeah. okay, that the.

um. power. No. the power ribbon plugs into, right? Yes, that's the power ribbon cable.

And yes, the temperature sensor. That's right. So they have like the three or four pins or whatever each side. and then they have the 10 temp sensor which goes up here.

Okay, so pin one over there and it's all on the bottom. It's all on the bottom. Of course, it's all on the bottom. unbelievable and goes into that diet goes into there, right? But once again, I'm not seeing how that makes sense because that's reverse bias.

You've got positive coming out of the battery here. Okay, and and then it goes into R0101. Fair enough. But then it goes into the cathode of d5100.

That does not make sense. Am I wrong? There's and and then then there's the capacitor to ground right. And then after that on the anode, there's the capacitor to the ground That That doesn't make sense. That's not how they normally.

That's not how a backup battery works. A backup battery will. It'll go into the anode of the diode. so it's forward biased.

So it, unless that battery is back to front. Hang on. Let's check the polarity of the battery. Our stupid bloody browser's blocked up and locked up again.

Now it's showing the positive there of the battery, right? Um, so yeah, Once again, that. how does that make sense? How does that make sense? Back up? No. Okay, No, no, yeah. like it.

It only makes sense if it actually goes into a pin of the processor. But we know that's not the case. There we go. Okay now.

Okay, so the diode makes sense because backup Vdd does. Actually, um, doesn't need doesn't go through that diode. Okay, right. But then why is the diode there? Why is the diode steering there if you know, Is it to charge up the backup? Like why? Like why would there not be another diode? A reverse protection diode on the series Diode on the bat on the battery Doesn't make sense.

All right. The only thing left to do. Um, I I really need to check that. I think I think it's important that I check that backup battery.

So the only thing I can do is to flip this board out, try and not dislodge any of the cables and oh yeah, I'll get like it doesn't. Yeah, I'll get back to you. Flip those bars okay carefully. We should just take the battery out as a matter of course.

Okay, here we go. There's one screw in there. Oh, I forgot about the ribbon on the bottom. Ah, oh.

that's killing me. All right. So yeah. I'm gonna have to.

I'm gonna have to disconnect this one. Flip it up, disconnect the other one, then reconnect this. I flipped all that out. Let's put this back in here and I can access the bottom.

So enough sticking around on the top. We know we can't do much on the top due to Murphy. Slide that sucker back in there. Okay, she's in all right now.

We can successfully flip this board out and now access. the bottom. Thing is, Yeah, we have to keep that one because I've already taped that from last time. Of course, here's our power so we can measure.

we can measure our backup battery. Now that wasn't too hard. should have done that before. should have just bit the bullet.

There you go. There's our components we're looking at, there's the diode, and there's the resistor. and there's the trace coming in. So now we should be able to measure that.

Ah, nothing. nothing. Yeah, that that battery's dead. That battery's dead.

Is it that easy? Is it that easy? Is that the correct ground though? Because there was the Rtc ground wasn't there and that could be different. The Rtc ground could be different, but I'd expect it's all. It's not floating. it's going to be referenced somewhere.

What if we plug our battery in to that? There you go. We plug our battery in. We get our three volts. Ah, hang on.

That's suspiciously the voltage of a Lithium coin cell. Ah, 3.1 Okay, right. so nothing activates until we get the what? huh? Ah, maybe it's that switch. You remember that we said there was like some um, battery switch or something.

that maybe, yeah, if you don't insert the but no, why would the backup battery die? I don't understand why the backup battery would be disconnected from if you take out the main battery. That doesn't make sense. Yeah, sure enough with the battery out, we get diddly squat so I'll push the battery back in and ta-dah that seems like a back up. That seems like a backup battery voltage to me, doesn't it? So it looks like that Lithium backup battery is Gonski because when you take out the battery like this, there's nothing there on that resistor which then feeds into that diode and then it also goes off.

uh, to that chip as well. So and the three volts being, um, pretty much what you'd expect from a Lithium battery that was actually coming from the diode there from this battery here. So that's like it only dropped like 0.1 volts or something. Um, you know, little because there was no load on and it was like a silicon.

Um, it was a shocky jobby And yeah, so it's there You go. The backup battery. So where the hell is it hidden? It's in a ribbon down there somewhere. So based on the schematic, it does actually seem to be like a rechargeable, uh battery.

So because it's got the diode which their back feeds it, um, in there through that what was it 220 ohm resistor or something like that. So it's it's gone. So I like. I can maybe understand why we took it apart, put it back together, and then it suddenly worked for a little while.

Maybe the battery was like accepting some charge and now it's like got nothing on it. I don't know. we need to. actually.

Problem is we now have to take the boards out and get back in there and get access to the battery. And of course I'm not going to have like a replacement for it so I don't know. Can we like temporarily? Maybe we can like temporarily bodge something in and see if it like powers up if it has that battery source there. um I mean it's It's very poor design that it doesn't power up that backup battery.

it should power up and just lose the contents. um that should be it. It should stop the camera working. That's that's really poor.

But yeah, at least we've got something to work with Now the battery's gone, which seems obvious, doesn't it? Yeah, so it's all gonna have to come out again. I really should have like that. That's something I really should have spotted on the first teardown. But as you um saw like I I did not see at all.

Um, the backup backup battery. um in the first, uh, first tear down at all. It just. I don't know.

I couldn't I don't even think I saw it on the like. The on when I watched it again. Um yeah. so it's in there somewhere.

So let's let's get all this out again. Is that it there? That's our battery. There you go, I see something round, I see something around and battery-like there you go. That's got to be it, right? No wonder we didn't see it because it's like kind of like yeah, it's It's taped in there right? That is taped in there so we should be able to access that actually.

can I get like a scalpel in there and can I? That's just like that's just like taped in there. We go. Is that it? Yeah, I think that was. yeah.

that was, uh, just glued down or something. there. There it is. got him.

Got him? That's a, uh, it's a, welded tab jobby and it's soldered down in place. Hmm. Indonesia, huh? Anyway, we can't actually get now directly on there and probe that sucker and I think you'll find she is Gonski. Yeah, there you go.

So I like, come on it's it's it's got to be it. It's sort of. That's the only really thing like that explains why it would like, maybe like come good like once. Um, you know, for like a period of hours and then just die, uh, completely.

The battery still had. you know it was taken as last gasps or something. So anyway, let's desolder that sucker and this is interesting. Look, it's bounced back.

It's coming back. it's rejuvenating itself. What we we measure we, we probe that and we'll get enough. All so I don't know.

It's maybe like, is this something else gone in there that's good. Like loading it down. Don't know what the deal is. I'm just going to solder that back on.

It's not close, but it's it's good enough. I don't think it's shorted. There you go. We've still got some voltage on that, so it's yeah, it's recovering because I'll shorten that.

I shot the pool bastard out when I was, uh, putting it back in. But let's let's put the battery in there. Yeah, 2.47 I don't know why we'll get nothing before, so that's going to slowly charge that sucker. Okay, I'm actually going to try and switch this on just for kicks.

I mean, it's got absolutely nothing plugged into it. No, no, it doesn't like that, does it? So that's slowly creeping up there. I don't think that's charging from the battery. I think that's just electrochemistry recovering.

Anyway, the point is it. it does seem to be retraining, retaining a charge there. So what's going on? So if we follow the money here, Rtc ground becomes reground. Okay, so backup.

Vdd is the thing that we want to actually follow the money on. But just remember Red Ground here. Yeah, we know about that here. It is here and it goes over to the battery and it shows the battery actually going to.

That's like chassis. That's like, you know, chassis ground kind of thing. So Bt 900 if we zoom in on that, there's our Lithium battery. Oh, it doesn't.

Actually, uh, tell you right, it must be connected through. Like the chassis ground must be the battery ground, right? Because there's only one. Like, there's not no extra uh, wire on there is there. So Bt 21, 4.

And yet sure enough, the negative of the battery is connected through to the battery. The Lithium battery that powers the camera. That's it. straight onto the terminal, straight there.

and that just goes through to pin one like that. And we know that that is a rechargeable jobby through that 220 ohm resistor. There's silly buggers at play there. Two point five, six, seven, eight eight.

Yep. And uh, that is recovering due to the chemistry. and if we plug that in, it's not actually charging up any quicker. So our battery is not charging when you plug in that.

and it's supposed to. And it's not supposed to do it when it's switched on. It's supposed to do it when it's switched off, right? So I reckon if we follow the money back on that, I don't know. we might find something.

Um, is that it? It's It's not the battery at fault. Uh, it looks like it may be the charging for the battery, but it's basically through that uh, deity, isn't it there? It is. There backup Vdd. That's that pin one.

So that's coming from the Flex. So the flex goes into that 220 ohm resistor there. Uh, can we measure that? Um, 220 Ohm. I can't see how the 220 Ohm's gone ski, but you never know you're lucky in the big city.

Let's get back in there with two smaller probes. I'm gonna stick with my yeah, There we go. Yeah, no worries. So that's no problem.

There you go. So the Diode's okay. The resistor's okay, that that resistor's not playing silly Buggers, is it? So that would be charging up the battery and the battery is over there at 3.03 So okay, 3.03 And if I disconnect the battery and measure it fairly straight away, we've got nothing. Why do we suddenly get nothing on our battery? Why? what the heck's going on There? Am I not making contact? Pretty sure I'm making contact.

There's nothing on that battery. Uh. Am I. Am I remembering that incorrectly? There's something 2.59 volts? What? Ah, What's going on? What? Why Why can't I? It's making an absolute fall out of me and we know it's connected through to right.

It's connected across one of the ground pins and then to the 220 ohm resistor there one side of it. It doesn't matter which side of it you measure, we know it's okay. Is this just not in? That's it. As far as it goes, it doesn't go in any further than that.

I have access to the pins. Which there you go. It's measuring 2.6 There's 2.6 volts there. There's nothing.

This is the um, uh temp, um thing, right? That's that's the temp. And we knew it was. Pin One was the it was the one ground. next was the ground next to it.

It's not this one over here. There's no voltage there. You go. That's got to be it.

right? That's got to be it. Is it? something to do? Is the ribbon busted? Let's go. let's go to the continuity. Nothing positive of the battery.

Nothing. What's going on. They're both busted. What negative goes to this pad here, right? Yeah, which is the one next to it is which is the one next to pin one there.

So pin Two, three, and four. And then the positive of the battery is supposed to go through through the flex down to here. Neither of them have continuity. What the? Let's get.

Let's get physical physical. I want to get physical. Okay, that's the positive. That's negative.

There's no negative. What the? How can the negative not be there like that? That's a massive trace that cannot be broken. Oh well. Actually no.

it's only small going from the battery. There's the tracers running down in there. Is it? Oh, hang on. Oh hello.

Oh yeah. look yeah. Ah. the whole thing's broken.

The whole thing's broken. Yep. Yep. okay.

it's still sticking there. You can see it. Oh wow. Okay, no wonder.

look yeah, yeah. Look, it's entirely cracked. Wow. Now I wonder if that happened during during my brutal teardown.

But like assuming that this is actually the fault, right? Assuming that this is the problem stopping a booting up, Then um. then um. it must have happened before I tore it down, right? Maybe because this was bent over on a very hard radius, like a 90 degree radius. Maybe it just cracked due to like material fatigue or something because it doesn't.

This part that like it's not like it flexes well. I guess my there's a bit of when you put the battery in like there's some. There's some like pressure pressure on that whole assembly like there is. Yeah yeah, actually there is pressure on that whole assembly every time you push the battery in, right? so that that that whole assembly moves.

Okay, so yeah. okay. there's some strain on that flat flex. Maybe it's just it's just broken.

But there it is. Yeah, I was wondering how you know Like there it is, you can see it cracked. Oh you little bastard. Okay, come on, it's gotta be it, right? Surely Murphy's had enough with me that that's gotta be.

He's tortured me enough. Bloody Murphy, right? And there has to be that. that. That's gotta be it.

That's gotta be stopping that pairing up. Is that that's not a copper return? No, No. Because we've already measured that. power gets to the board.

Okay, so it's only it's only the we can go back to our video tape. Look at them all. I love just looking at flex boards. There's just absolutely fantastic.

Anyway, here it is, right? Yeah, yeah. so it obvious like the battery. Yeah, the ground doesn't go up there. The ground doesn't go up there.

But that part. That part right there. right across there. both tracks.

That's the point. It failed. Probably because yeah, there's probably more stress on the like. The outer part.

I don't know. Mechanical engineers tell us like when when a cable when that cable flexes over like that, when it folds up. when that battery folds over and upside down into there, there's a 90 degree bend on that. And then if you've got the whole assembly going, Wiggle Wiggle wiggle Yeah in there each time you take out the battery.

Is there more stress on the outer part or the inner part? But anyway, the outer part is broken. It's just sheared it like half of it just across both tracks Gonski. So therefore the only took me like an hour and a half to find this right. I with with careful viewer a careful inspection or just lucky inspection.

I could have found this the first time I took it apart. I could have found it in 10 minutes. And you know, Boom right? Oh problem. Let's fix that.

Does that fix the problem? I'm assuming this is going to fix the problem. I'm assuming it's not booting up because there's no battery there, right? So yeah, it's just coming to gutter completely. That's interesting, huh? you bastard? Look at it. Look, look at that.

Here we go. Here's some fail porn. There you go. Demonetised.

You can see both the traces under there coming out. Jeez. Wow, look at that. So um, how do I fix a flat flex like this? Uh, well.

unfortunately. so the traces are on this side so that makes it a bit harder to access in situ. There you go. Yeah, it's just a very.

I couldn't think of a more inconvenient spot for there to be a fail to try and repair that that is Re and it's right on the bend too. So any and it's on the underside of the bend. I can't Murphy Again, I couldn't believe like there's like it couldn't possibly be in a worse location for that to happen. That's just terrible Muriel as a barge.

If you're really desperate, you can run wires direct from there up to the bottom of the main board. But once again, you've come a gutser because you've got to go to the bottom. You've got to solder onto the bottom of the main board. right in here.

Bet you could, right? You could like if you could if you thought that you could tuck the Uh wires away and stuff like that. But even if you use really fine mod wire this fit to envelope design is really tight. Um, so I don't Yeah you. you're probably not gonna uh do that easily.

Oh yeah, yeah yeah, yeah. Got it. Got it. Got it? Got it? That's right.

it was taped down. That's right. I remember need to watch my own video. It was taped down all right.

So no workers. Um, we can get in there and we can. Uh, we can of course. now.

Zoomizumi right in there. I can see that break that's terrible. Muriel. What a mongrel, huh? What an absolute mongrel.

Both traces broken. Wow, right? How do I actually get that off? It's got like a copper thing on the back. It's got a whole copper clip going over. Maybe I get that tape off that black tie? That black stuff looks like tape holding it in.

I know there's a screws. one screw. All right. I'll take that out.

I'll uh, love how they use or practically all the almost all the same screws in this thing that didn't do anything complex. little assembly in its own right. I mean, that's just that's you know. just that whole battery system is just crazy complex.

the door and the hinges and the flat flex and the the weight. You know, the battery holder and then this thing on the side, which I don't know what the hecks that's doing. Um, that big metal. Like It's almost like that's a little die-cast metal bit and I.

what's all this copper on the back? It's a hugely complex thing. I can't believe that they didn't have a team that went through and just optimized. You know, optimized assembly and stuff. No wonder this is expensive.

Camera: imagine trying to assemble this and all the different parts required. Wow. Starting to think all this stuff in here is is bonded like I took the tape off the back. Nothing's coming off.

Everything seems like I don't know. at least adhesive bonded in there. It seems really annoying. I'm like, you know I can get into these, but there's not enough purchase down there to sort of.

Maybe I could try and do a firewire link over, but ah man, it's gonna be ugly. Can chop out some of the plastic there? Maybe don't need the plastic chop it out? No worries. And they're so close together. The pitch is just incredibly small there.

In fact, I can tell you what the pitch is. It's hard getting both of those in there, but there you go. That's point. One millimeters.

uh sorry. 0.01 millimeters. That's that's one millimeter. So there's 10 divisions in there so that like yeah, the pin pitch is knuckle trace pitch.

Sorry, it's not fall. So yeah, that's not. That's not fun. I almost think it's going to be easier to simply put some tiny mod wires.

I know it's a horrible bodge, but I think it's actually going to be easier to put like some mod wires just from here and just solder it onto the solder under the main flex. Here See, the problem is like just scraping off the uh, polymide coating on the traces. There is going to be difficult. It's not something you can easily do like.

Technically, I can get an iron down in there, but they're so bloody close together. Like just even scraping that flat flex. you're not going to be able to do anything, so it's really tolerant. Robust stuff.

except when it when it breaks like that. Uh, when it turns brittle and just breaks. Yeah, I don't. I don't like my chances of even like putting like links back on there.

It's just doesn't really seem doable. Put mod wires over there, over to this ribbon and once again, I've got the same problem scraping away the ribbon. but at least I have more chance here. Get you know, even if I've got room to get down, I probably do.

in theory, I've got room to get down there and scrape off the uh, polymide coating on top of the traces there. But even if I did that, I'd have to put little tiny links in there. How are they going to stand up to the flexing? I don't know. but anyway, trying to scrape off you really have to like do a physical abrasion type thing with the Um with the scalpel or whatnot.

but I've got no physical backing to do that on. Really like it. Ah, it's awful. At least at least this big one over here, right? I can at least put something hard under there, and uh, then get on there with the scalpel and try and scrape it off.

So I'm gonna give that a go. so I'll get that on a surface. there. it's just awful job trying to do this.

Imagine if you had to repair a multi-fine pitch thing. it's just. ah. it's really awful stuff for those who think you can do it with a soldering iron.

Got very little luck as well. See if the Swiss army knife is. Am I through to the copper? Oh yeah, yeah, it looked like it went all the way through. I think I'm through.

I think I scraped away. Depends on the type of knife you have. My Swiss army knife just seems to be better at that. That's that's that's the gold surface, right? Yeah, yeah, yeah it is.

You have to get in a certain light. Okay, see if I can do the same thing. Okay, yep, I've exposed some of that. So I've exposed both.

That captioning, not there we go available. Got some take on to that nice, okay flux bent. Even though there is flux in mind. believe it or not, there's five cores in this, uh, knot point.

What is it? 0.38 0.38 millimeter solder. There's apparently five cores of flux in it. I think. yeah.

Five coils of flux. How the hell do they get in there? Ah, the Oompa loompas. The flux at this solder factory? I don't know. Magic.

There we go. Beautiful. Ah, pure thing of beauty. Joy.

forever. Look at that Bobby. Desolate. All right.

Mod wire. Beautiful little mod. Look at that Now whether or not, whether or not these wires are going to fit and cover that with insulation. if there's anything, uh, conductive on top.

Got to watch for the metal case and everything like that. You've got to be careful, you don't come and guts are there. but we can cover that with some insulation. So what I want to do.

So now I can just I can solder that directly over now. But now it's a matter of, uh, like form fitting the wires Like, actually probably can't do that until it's all reassembled and I kind of sort of know how much like play I've got and stuff like that. Um, so it's it's not. Yeah, yeah, like how to form the wires so you're better off like cutting it, figuring out how they fought how the wires form first in there and then cutting and stripping them and soldering onto the battery.

I think. so. yeah. Anyway, so this one here.

I know they've got the same color, probably should have used different colors. Doesn't matter. So yeah. but this one's obviously.

of course that's our battery positive. So that goes to the case over here, which is our left hand. uh, pin over there. So yeah, I mean, I could fold it back in, but then, how where does the Sd card board go in relation to this? I can't remember.

it screws on there and I don't know. I'm tempted, right? I think I'll put this back in the camera now and I will attempt sort of partial reassembly just to see where I'm at. Um, with, like in in regard to how I can form these leads, right? So that goes in there. Sd card board is the biggie.

I probably should have had the wires coming out the other direction rather than out the bottom. Uh, the top like that. So it looks like right? We can probably form the wires down through here and around and over under like that over under kind of thing and off to the side of the board because the board's going to be in there like that and then we should have enough gap to pop them out there. I think so.

Something like that. But you know, here's where if you cut it wrong like you've just, you know, you kind of have to like start again from scratch. So that's really rather annoying. And yeah, I shouldn't have put those on the bot coming out the bottom like that.

maybe. And uh, this is the smallest mob wire I can got. I like. I can go smaller.

If you want smaller mod wire, you can, you know, get a multi-stranded cable and you can strip it and get little individual strands out of there. And that's a good way to get yourself some mod wire. but of course it's not insulated. doesn't have the uh, but yeah, this is the smallest, um, insulated mob wire I've got.

For those playing along at home, it's 30. Awg, Okay, industry wire. That's just like my standard mod wire. I think I'm going to have to just hold my tongue at the right angle and guess that now of course, when you strip these, you want to hold on to them.

Geez, I hope all this works. Hope all this effort's not for zip. That would suck, wouldn't it? We'll tim those. Okay, let's go for broke.

So we've done our little mod. now. we've got to flip our battery back down into its little holder. Yeah, Ah.

I think I cut them too short. Damn it. Maybe Maybe has that actually gone down flat? I don't know. A ribbon I've had problem with in the past and I've broken one of them.

Yeah, yeah, I've broken one of them. Yeah, Okay, yeah. so I soldered that down too far. Um, yeah.

I didn't account for the coming over the top. Yeah, I had to simply do. I'm going to have to desolder that and I'm going to have to do it again. So that fitted back to I've got that fit fitted back down and I've got the wires coming out.

I'll screw that board back in. I think. There we go. So that board's back in.

I've got two wires coming out that are probably not going to be long enough. Now tell you what, I'm going to worry about. All that later. I'm just going to.

ah no. because this goes on the underside of the board, doesn't It goes on. the underside of the board, goes on the underside of the flippy like this. So it connects in like that.

So yeah, oh man, this is this is nutso. Yeah yeah, yeah. I needed finer mod wire and I should have made it longer that. Yeah, that was dumb.

I shouldn't have. I should have soldered them onto the battery, fitted the battery first. had the wires coming out, and then once they were out, I then I should have put everything back together and then cut to size and then figure out where to do the scrape. Um, but then you've got to have a hard surface to scrape it against.

So you know, Like, But here, I've got conveniently got the board. Um, yeah, I should have done that. That was dumb. Now regretting that.

All right. That was obvious with hindsight: 2.46 Okay, so that bottom one is negative, so I'll just mark that so I don't give that up. Maybe it's just long enough. Maybe.

Now the problem is, when I fold this like this, it comes back like no, no, they're definitely not long enough. Um, right when it folds over like that, I mean, you know, Look, there's no reason why I couldn't like solder like the ground down to like here or something like that. Like, there's no reason why you can't take like a shortcut like that. Uh, for example, um, because it's only battery.

It doesn't matter. but to test that, I've got to put the uh, ribbon cables back in and test the continuity. I think I've taken some trace off there too. All right.

So what I'm going to do? Yeah, I'm just going to have to scrape some more off. There's my teeniest tiniest heat shrink. We'll give that a go. Couldn't be bothered using the hot air gun.

Soldering iron is good enough for Australia. Adds a bit more bulk, but now she'll be right. Stuff those wires somewhere. Okay, so I've got those wires attached.

Um, I reckon that can stay. Oh yeah, that one's a bit how you doing Anyway, We'll see, We'll see. Let me see if I can get this back together and uh, yeah, see what we can do? All right. So this has to go under here first.

I think. so that's our battery. That's a real pain in the ass connector. Let me tell you now, the battery connector.

This is ridiculous. Be careful, this is the one I soldered to so it's getting flexed to. Then you got the top panel connector and this is just really is crazy stuff. You get used to this I guess if you're doing it every day, but that's not all the way in is it? So as you can see, I've soldered a 220 ohm resistor onto there like that onto that diode and I'm hoping that does the business.

Um, that's the plan. Anyway, he's so fingers crossed. I've got to anchor down that wire because as I uh, like move, you know, flex, move this board back into position and stuff like that, it's just going to completely come a gutsy so I really need to stick that stick that down. So probably some super glue or something something needs It needs to stick on there somehow.

Okay, it's back together. I think let's put a battery in and let's see what happens. Okay, S: Press the power button. Nothing.

hold it down. Nothing. Although, it might need time to recharge the rechargeable battery assuming it's all still connected. Let me plug in the Usb.

What? what? What didn't work After all that worked. Zippy to do that. Did I forget something? Don't think so. I just cannot cop a break, can I? So unfortunately, it's like I said, it's difficult to like measure things in here.

After you've reassembled, you've got to reassemble it and hope that you've done the right stuff. And it's worked. But in this case. nope.

We've come a gutser and nothing happens again. I don't even get the orange, uh, lead anymore right from from the Usb, so I don't know. I don't know what's going on. I'll I'll measure that Usb current.

actually. There you go. It's actually drawing 1.4 milliamps. So if I press the button, does it do anything? If I hold the button down, Does it do anything? No, it does.

absolutely nothing. So that's that Could be trickle charging the battery. Could it? Or that's just other standby stuff happening in there really? is that? And yeah, yep, that's that's genuine. Oh, there we go.

So when I plug it in, draws 150, I presume. that's like charging the battery. It realizes art. Now, Battery is pretty full and it switches off.

That's another hour, at least down the drain. Uh, well, not down the drain. because we did find a fault on this thing and I did my best to repair it. Um, and I put it back together and it's just.

it's doing nothing now. So almost back to square one of trying to get all this stuff out while leaving it connected and then measuring voltages. and I've That's it. I'm I'm done for the day.

Um, my time has run out. I'm gonna go home, so that's it. Give me a big pity thumbs up. Whilst I connected this over to here there is, I can't see a trace going off from there to the Ic, which is the direct backup because it doesn't go through the reverse bias diode, right? So I'm thinking that there is a Via down in pin one there.

So pin one is isolated, so I've got to short out that 220. Ohm there. so that might kick it back into action. That's what I'm thinking.

Anyway, Okay, what I'm going to do now is I'm going to look across. We'll measure the voltage across C8414 because this is supposed to be the capacitor that is across Vdd back up. like actually on that backup Vdd pin D3 there. So if you're not getting voltage on there, that's what I suspect is not causing it to boot up.

So if we can measure the voltage across C8414 then we can verify whether or not voltage is getting there. I have actually measured voltage on the board. I am actually getting my 2.9 volts or whatever it is on the board so that part of it's working. so I need to peel back some of this thermal pad to reveal the capacitator or down in here somewhere.

Once again, the problem here is that I can't probe on the underside of here without plugging in the actual connector because that's where the battery voltage comes from. I just don't have the flat length of flat flex length. Here's the flat flex. We've got to connect it over to here.

So that's really annoying because the capacitor I want to measure is that one down in that tiny little bugger down in there. And that is the input pin to the micro down here. that, um, detects the backup battery voltage. So, and I can't.

You know I can't measure it in situ unless the board's flipped over and I have actually measured that. I am getting the voltage on here at the end of the resistor. But whether or not it's coming over to that pin, so all I can do really is, um, I can try and measure. Actually, I'll measure the continuity there.

Okay, the only thing I can really do now is, uh, join, short out those two pads in there, join this back. Um, that's that's pretty much all I can do. So I'll give that a belt. Um, it's really hard.

It's so hard to get in there with the iron. It's just it's crazy hard and then trying to support the board as well. you can see the board support I'm using. I've got a uh, Pcb.

none of that Pc bite. Put a hyphen in the right place. Um, and yeah. and then this is then the camera's propped up on the multimeter here and it's just yeah.

It's it's nuts. It's nuts. Anyway, yeah, this is what you have to do because I don't want to have to keep taking the board out every single time I want to do work on it. Um, it's just yeah.

it's crazy. and then when it's in, you just can't probe anything. It's nuts. Oh, did I get it? I think I got it.

I think I got it. I think I bridged that. It's a bit how you doing but I think I might have got it. I don't know.

I'll just try it. Let's see if I can buzz that, shall we? Yes, got it all right. I'll flip it back, plug it all back together, and uh, see if I see if it does anything. Um, the the super glue by the way on my wire in there worked really nicely to, uh, glue that in place and so that's all solid so I can flip the board in and out and the other wire down in here is holding on really well because it's connected through that big fat, meaty, uh ground uh trace running through there.

So yeah, no worry. So I can sort of like handle the board now. So it's really, it's really quite okay now. so let me put it all back together.

I'll get back to you all right, it's in. Let's see if I can do anything with it again. What? What? What? what? No, Let's plug in our cable, but I don't have everything plugged back in at the moment. I don't have the um, Sd card, so that could be a thing.

Hey, that's actually holding more charge than it did before. For longer, it actually dissipated to zero. That is progress. That is progress because when I plugged in the Usb before, it was, um, it initially surged like 150, 180 milliamps or something.

and then within seconds, it sort of dropped down. Like five seconds to drop down to like one milliamp standby. So obviously it's charging the battery at the moment. So that's interesting.

So like I don't have the Lcd plugged in, I don't have the Sd card plugged in. Okay, so I'm pleased with that. Let me put the Sd card, ribbon cables back in and the Lcd and try it again. I think it's reassembled.

Just the battery now. Battery plus Usb 160 milliamps 180. Now let's drop down to one again. Now I'm back to where I started.

That was progress for a minute. Can't cop a break, you.