Philips 32pfs4132/12 LCD TV repair

[shybear]

hi,
this TV  comes with power ON red LED blinking.
Power board model is 715G7734-P03-005-002H and schematics (also in Service manual!) is different but not su much.
So for reference I worked on 715G7734-P01-005-002H and I find Q9101 defected even if it was no burnt.
Then I checked all others components around it also on SMD side and changed as well IC U9101.
-See reference picture for all tested (OK) and changed (CH) components.

All seems to be fine but TV still doesn't power on and power ON led still blinks.
So I tested voltages on exit connector CN9101 and instead of 12V as written I've:
around 8V without cable on the other board connected that goes down to around 4V if I attach the cable.

There is an other strange thing no matter if power board is connected or no, main capacitor C9801 doesn't discharge and stay at 300V.

I think that primary side is ok then now I'll try to looking some problem on secondary side, any help will be reapply appreciated.

[fzabkar]

What is the VCC voltage for IC9101?

[shybear]

What is the VCC voltage for IC9101?

...moving on repair search I wanted to desolder mosfet Q8601 / AOD2922 but even if I didn't force it so much one pin a part of plastic broken so I can't say if it was bad or good. Anyway I tested all SMS resistors around it and D8601 is ok.

Replying to you, I powered the board without broken mosfet (I've to buy it) and on CN9101 voltages are just mV but Vcc on pin 5 of U9101- PF9005AG (that is the 3+3 pin not  4+4 as the posted picture) is 12V so I suppose its right!
I also checked all SMD resistors that exit from IC to point (A) that go to diode bridge.
On C9801 there are 300V that doesn't discharge for itself when power is moved off.

[fzabkar]

When the supply is regulating, I expect that the Vcc pin (pin #6) should get around 16V or so from the auxiliary secondary winding of the transformer.

Unfortunately the only information I could find on the PF6005AS IC is this brief datasheet:

http://www.powerforest.com/upload/userfiles/1443694534890020877.pdf

[shybear]

When the supply is regulating, I expect that the Vcc pin (pin #6) should get around 16V or so from the auxiliary secondary winding of the transformer.
This could explain why instead of 12V on exit I find only around 8V.
The attached schematic I used for reference is P01 model but this board is P03 and its different especially on the other side, but basically key components are the same.
I don't remember if I said but next I changed mosfet Q9101 and problem was not solved I changed U9101 as well.
Even if on electrical scheme U9101 is PF6005AS 8 pins, if you take a look on boardview scheme its used PF6005AG 6 pins as this board.
Anyway I checked everything and can't find something wrong but I'm sure there is something that does not work properly because if this board works I think I must have 12V on CN9101 no matter if cables to other board or LED panel are or not connected.

Unfortunately the only information I could find on the PF6005AS IC is this brief datasheet:

http://www.powerforest.com/upload/userfiles/1443694534890020877.pdf