Re: Dead Vestel 17IPS71 power board
Forgot to say that it made no difference if I heated those capacitors up. Still resets.
FullnameJon
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Last Activity: 03-01-2025, 07:43 AM
Joined: 08-05-2020
Location: Skåne
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Re: Dead Vestel 17IPS71 power board
Ok, I can't even find the marking for C295. C302 isn't populated. C296 read 95.76uF and 0.40ohm.
C64 110nF no ESR reading.
C73/C33 (double marking, same spot) is a 100uF 35V that read 105.2uF 0.34ohm.Leave a comment:
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Re: Dead Vestel 17IPS71 power board
I have checked those. I will check the caps as soon as I can.Leave a comment:
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Re: Dead Vestel 17IPS71 power board
Yes sirLeave a comment:
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Re: Dead Vestel 17IPS71 power board
I've tested another mosfet and optocoupler, no difference. U202 or something before it keeps resetting it seems....Leave a comment:
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Re: Dead Vestel 17IPS71 power board
If I test the DC output with the mainboard connected, the voltages drop even faster than before. Measured HV from FAN6300A to 320V and VDD peaks at 20.68V but dies almost directly then goes back up and repeats.Leave a comment:
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Re: Dead Vestel 17IPS71 power board
I noticed that too but they're connected. Didn't bother tidying it up yet.
Pin 9 shows 1.5V. Where does that come from? There's no Q1.Leave a comment:
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Re: Dead Vestel 17IPS71 power board
1 - 24V
4 - 2.5V
10, 11, 12 - 12V
Again, it moves around a bit as the supply restarts....Leave a comment:
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Re: Dead Vestel 17IPS71 power board
Board is R4.
Pins 1-8 where?
C19 is 320-321VLeave a comment:
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Re: Dead Vestel 17IPS71 power board
I've gone through this thread a couple of times but my issue doesn't seem to match, I think. I get 12 and 24V outputs, but not stable. I can hear something restarting every couple of seconds and the voltages on the DC side drop just a little bit before it goes up again, and then down a bit. No standby light and no life in the TV other than the unstable voltages. I've replaced FAN6300A as I thought that was causing the issue, but no luck. Bad caps? Bad IC?Leave a comment:
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