Philips LC4.3E Power panel PLCD170P2

[Turnip]

Hi Folks,

   Have a 26PF5520 that came in with mains fuse blown. Did cold checks and all seemed well so replaced 3.15A and plugged in with series lamp. There were clicking noises with the lamp flashing but no obvious signs of a short. Eventually the clicking stopped with HT still present but no secondary voltages.

   Any thoughts ? - Chris.

[WILLYAM1]

hi chris.
check start resistance and small elect capi in primery.
if ok check whith scop 5v stby if its pumping(up and down) check optocoupler feedback and elec capi  5v feedback.
good luck willyam1

[SUPER8]

If you get stuck I have a complete working chassis .
SUPER8

[Turnip]

Hi Willyam and Super8,

   As power supply is common to several chassis, I had a spare or two, and the set worked. Fault is curious however as a blackened 3.15A fuse usually means cremation somewhere, especially Philips with all those little blue ceramics - not a sign though, will have to check input components with a Megger.

   Thanks again - Chris.

Had one in - March 2015 where it didn't fire up to S/by. Folks on line suggested replacing - C130(100/25)
C236(22/50) C526(22/50) and C505(22/50) - Did the job.