Well from what I can see I seem to be the first person who's 32 inch BL3200PT has lost power. A couple of months ago it went completely blank (including lights) and I could smell some hot smokey electronics.
The first problem I came up against is that they aren't a very common monitor so there's no useful information about them online. I haven't been able to find a service manual (on electrotanya) and once I got it open I couldn't find any reference to the power supply model online either!
The caps look fine visually. There's a guy fixing benq psus on youtube who says they are the only ones he frequently sees go bad elsewhere before the caps do. I can believe it. I will test and replace the caps for good measure if I can fix the current problem.
The obvious observable fault is an overheated mosfet HS4 Q601 (11N80C3) and a charred resistor R616 on the HV side of the board. The resistor lies between a transformer T601 and pin 16 on an undermounted chip IC601. I'm hoping that this will be enough context to identify the resistor but so far I can't identify either the transformer or the IC.
So as you can probably tell I'm no electrical engineer. I am keen to learn though if given a nudge in the right direction. I hope I have provided enough information for people to be able to see what's going on. If I've missed anything I'll add it of course.
Any help with this one would be much appreciated.
Note: I put the hi-res photos of the boards on Dropbox because they are too big to upload to the forum.
Hi-res Board Photos:
https://www.dropbox.com/sh/nozzv360u...aGg4usfQa?dl=0
PSU Board: 4H.2CR02.A00
Capacitors (just in case any stick out as particularly bad)
- CapXon 120uf 450v 105C
- Rubycon 470uf 35v 105C
- Lelon 33uf 100V 105C
- Elite 22uf 50V 105C
The first problem I came up against is that they aren't a very common monitor so there's no useful information about them online. I haven't been able to find a service manual (on electrotanya) and once I got it open I couldn't find any reference to the power supply model online either!
The caps look fine visually. There's a guy fixing benq psus on youtube who says they are the only ones he frequently sees go bad elsewhere before the caps do. I can believe it. I will test and replace the caps for good measure if I can fix the current problem.
The obvious observable fault is an overheated mosfet HS4 Q601 (11N80C3) and a charred resistor R616 on the HV side of the board. The resistor lies between a transformer T601 and pin 16 on an undermounted chip IC601. I'm hoping that this will be enough context to identify the resistor but so far I can't identify either the transformer or the IC.
So as you can probably tell I'm no electrical engineer. I am keen to learn though if given a nudge in the right direction. I hope I have provided enough information for people to be able to see what's going on. If I've missed anything I'll add it of course.
Any help with this one would be much appreciated.
Note: I put the hi-res photos of the boards on Dropbox because they are too big to upload to the forum.
Hi-res Board Photos:
https://www.dropbox.com/sh/nozzv360u...aGg4usfQa?dl=0
PSU Board: 4H.2CR02.A00
Capacitors (just in case any stick out as particularly bad)
- CapXon 120uf 450v 105C
- Rubycon 470uf 35v 105C
- Lelon 33uf 100V 105C
- Elite 22uf 50V 105C
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