Vestel 17PW25-4 repair - resistor value?

[tn245]

I bought a repair kit for this TV power supply. Shorted diodes, FET and several tiny surface mount components to replace. On starting the repair I noticed someone had had a try before me and even helpfully ripped up some of the PCB pads. In spite of that I think I've managed to get everything in place and connected up correctly.

My question. The schematic for this power supply (attached) lists SMD resistor R923 (off pin 4 of FAN7529) as 15R, but the repair kit supplied 100R and the one I removed from the board was also 100R (bearing in mind someone had repaired it before - maybe with same kit?). I wrote to the kit supplier to ask about it and he hasn't replied.

As I don't have the electronics knowledge to know what that resistor value should be, do you think there's any reason a 100R might be supplied instead? If I go ahead and use 100R might there be any consequences?

Thanks!

[Klockaren]

Re: Vestel 17PW25-4 repair - resistor value?

I bought a repair kit for this TV power supply. Shorted diodes, FET and several tiny surface mount components to replace. On starting the repair I noticed someone had had a try before me and even helpfully ripped up some of the PCB pads. In spite of that I think I've managed to get everything in place and connected up correctly.

My question. The schematic for this power supply (attached) lists SMD resistor R923 (off pin 4 of FAN7529) as 15R, but the repair kit supplied 100R and the one I removed from the board was also 100R (bearing in mind someone had repaired it before - maybe with same kit?). I wrote to the kit supplier to ask about it and he hasn't replied.

As I don't have the electronics knowledge to know what that resistor value should be, do you think there's any reason a 100R might be supplied instead? If I go ahead and use 100R might there be any consequences?

Thanks!

Hi,
I have the same problem regarding R923. I havent got any schematics with the right value for this resistor.
Then R980 are broken and I can't see the numbers on it. Schematics says 15R for this also, but I don't trust on this.
Do you got any correct schematics for this board?
/Gunnar

[steviewonder]

Re: Vestel 17PW25-4 repair - resistor value?

bit of a old thread,but just had the same problem.
R923 is indeed 100 ohm,the schematic is incorrect.

[budm]

Re: Vestel 17PW25-4 repair - resistor value?

15 Ohms or 100 Ohms is not going to make any difference, the there is 40K internal resistor/Capacitor filter feeding the input of comparator circuit inside for that Current Sensing (CS) pin. if you look at the app note circuit, you do not need the resistor.