In article , says...


Matti Kaki wrote:

Hello from Finland.

I have Philips TV 29PT8702 chassis: MD2.12E which whines a lot.
It has also odd phenomenon which looks like ringing or ghost.
Few vertical bars on the left and the right part of picture.

I have varnished the L.O.T. and linearity coiletc. but no help
at all. The whining comes (I'm quite sure) from L.O.T. I took
few pictures if you like to take a look of the phenomenon.

http://www.sci.fi/~oh2bio/hilipsi.jpg

I remember that I have seen this phenomenon in Barco monitor
and it was caused by bad voltage. I checked the voltages from
PWR but they were quite OK (if I haven't missed one or two).

Did you also measure the ripple on these voltages? I had a similiar error
with an older ITT tv set caused by a bad cap in the 12V-branch.

Yes I tested the ripples but it is possible I have missed
one or two voltages because Philips TP-markings are terrible.

Whining on another set was caused by bad B+-cap.

Allright. I'll measure again or just replace the capasitors anyway.

--
Matti Kaki at iki dot fi http://www.sci.fi/~oh2bio
=========== Location: 60.414 N 25.097 E ===========
Navigare Necesse Est - Vivere Non Est Necesse