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Nederlands Forum over Oude Radio's |
Re: Philips TV 17 TX 250 A
Geschreven door Johan van der Levin op 10. Jul 2006 12:57:29:
In reactie op: Re: Philips TV 17 TX 250 A geschreven door Henk van den Broek op 07. Jul 2006 16:53:46:
Hello Henk!
Many thanks for reply and information!I have tried some of your tips, without result. Here are more information about the problem:
The picture does not show any disturbance during the ticks. When I change volume and tone, it does'nt make any differece in the frequence of the ticking. In my set the B3 tube is a PCL82 and the B4 a PL84. There are some difference in the DC-voltage when I compare with the schematic. Testpoint 2 (socket-pin 2) on the socket to B4 is suppose to be 110v, when I measure it with a DC-voltmeter it shows 165v. The socket-pin 3 is suppose to have a voltage of 115v, but show 160v. The resistors seem to be in order and seems to have the right value when I measure them. The capacitors C44, 45 and 46 is OK.
The sound does change in frequnce when I change contrast. Brighter picture results in lower frequence in the ticking. There seems to be lots of strange faults in my set. When I examine the contrast-cirquits, it seems to be connected to tube B10 (PCL84). Also here, the voltage does'nt agree with the schematic. Socket-pin nr. 6 (135v) show ca. 195v on the instrument.
Hope to get som more help!
/Johan