Finlux 32FLD760P with Vestel 17PW20.v1

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

I'll replace the caps first, have it on the table currently but I'll check values right after that. I did double check the cables and connections, nothing.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Update. The big cap has 333v as usual when plugged in and power button on.

No blue LED, no voltage on any of the connector pins, and no clue what happened.

I checked the soldering with a magnifying glass and I can't see any shorts or locations not connected. Something must've died, and badly since there's no 24v, no 5v, no nothing.

Edit. Lower half of the PSU has no power at all, upper half seems to work just fine.

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

OK, only way this happens is if standby dies... Check grey-black wire going to that red two pin connector. Plugged in fully. Both states of power switch tested.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

0v, standby is definitely dead.

Edit. I'm trying to read the schematic for this board but it's jibberish to me, I know what parts are what but I'm terrible at knowing which diagram is where on the PSU

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Don't worry, Vestel schematics confuse me too.

Chip ID for PFC is wrong... just in case you get confused..

"TNY866" is wrong. It is some other odd chip.

Across C801, 33u 50V, you should have a voltage, anything?

Check IC825... bottom of board, secondary near standby for shorts.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

"Across C801, 33u 50V, you should have a voltage, anything?"

I can't reach the pins to check, it's too close to the board and I can't reach around back. That is the cap I talked about earlier, the 33uF 63v ones that I changed which made all this stop working. I think the problem lies around this cap on the backside of the board, just not sure how or why?

"Check IC825... bottom of board, secondary near standby for shorts."

I can't seem to find the IC825 anywhere, but I did check all connections and I don't really see anything out of the ordinary

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Well I just found a faulty 17PW15-9 lying around, so if you need any tests to compare...
It has the same problem yours originally has but I don't have a TV to install it in yet.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Anything above red line measures ok, has power. Anything below has nothing at all. The green circles has power but the grey side is 0.

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

What is the P/N# for that 8 pin IC near standby transformer?

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

I borrowed a picture from the web with much better quality, I think you can see what you need to see, but I fear you know all this on the back of your hand already

I'm guessing P/N# means the IC806 number?

I'm not really very good at all this stuff, trying to learn as we go along.

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Yeah, IC806 number.

One thing to try is the PSU without the side-on switch plugged in.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Yeah, IC806 number.

One thing to try is the PSU without the side-on switch plugged in.

Just tell me how and I'll do it, anything to have something to do, and well, hopefully maybe possibly not likely repair this damn vestel crap

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Unplug that grey cable+red connector and see if voltages come up. Bottom middle in this pic.
https://www.badcaps.net/forum/attach...9&d=1359576948

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

No difference, still nothing below that red line, no matter what or where I check.

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

OK, IC806 number please?

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

DL321 VH27, that's the number written on it. I sure hope that's what you were asking or I'll look like a total beginner here haha

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Yeah, that is what I needed.


Test these pins with DMM negative on negative of big cap.

Pin 1: GND (expect 0V)
Pin 2: Vcc (expect around 12V)
Pin 3: VFB (not sure)
Pin 4: Ipk (not sure)
Pin 5: Vstr (expect near Vcc)
Pin 6: Drain (expect around 330V)
Pin 7: As above
Pin 8: As above

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Pin 1: 0v
Pin 2: 12.5v
Pin 3: 0-0.1v
Pin 4: I believe 0.2, hard to reach good.
Pin 5-8: 330v or so, same as big cap.

[tom66]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

Can you check pin 2 to see if it is a steady 12.5V or if it is unstable. You can check across the 33u/50V if it is easier -- positive lead on positive side of cap and negative lead on the big cap or on negative of 33u.

[Serkai]

Re: Finlux 32FLD760P with Vestel 17PW20.v1

It's stable at 12.52V, most certain. I had to solder the 33u/50V so close to board I can't even get under it, too short legs.

I'm thinking about moving the new panasonic caps back on again, but the difference is that the caps now are 63v and panasonic is 50v, and you also mention it being 50v. I'm confused at that