Philips 40PFL4908/F7 Dead

[HMRG123]

Have this set and the customer said it just would not turn on one day. Q601 is shorted, R611 and F602 are open. I do not see anything else as bad. Does anyone know of anything else I should check before replacing these parts?

OOPs, just rechecked and found D653 shorted...same question: Does anyone know of anything else I should check before replacing these parts?

[neilc6]

Re: Philips 40PFL4908/F7 Dead

The power supply on this model is probably similar design.

https://www.badcaps.net/forum/showthread.php?t=72916

[Unspun01]

Re: Philips 40PFL4908/F7 Dead

You will want to check and replace at least the following parts:

F602 (fuse, 2.5A, 250V),
Q601 (MOSFET transistor, N-channel, 7A/600V),
D608 (zener diode, 36V, 1Watt),
R611 (Fusible Resistor, orange, black, silver, gold = 0.3ohm, 5% tolerance, 2 watt),
D653/D655 (Schottky Diode, SB3A0 = 3A, 100V),
D607A (zener diode, 27V, 500mW)
Q602 (2SC5344SY = BJT NPN transistor, 800mA, 30V, SOT-23)

D607A and Q602 are small surface mount parts on bottom of board.

See attached service manual.