Thanks for the replies, guys!
Quote:
Originally Posted by Electronic M
I have a parts chassis (no cabinet trim no CRT) if you need anything.
|
Thanks for this as well! I may contact you if I need to purchase a part based on what everyone says.
Here is a link to the schematic (JPEG image on my box account)
https://app.box.com/s/8p6u58ccdusfxwhzi36npmc4t34aawyx
I have already replaced all the electrolytic (polar and non polar) and paper caps, but have left the ceramic caps alone. Still have only raster, scratchy sound and no pic. Changing the channels does nothing to what I see on the screen.
The test points are described in the service manual as follows:
TP1 should be -.35V and is the Horizontal Oscillator Base (reads on spec)
TP2 should be -.35V and is the Horizontal Stability Coil (reads on spec)
Test Points 3 - 5 on the Video/Audio/Sync board are quite off.
TP 3 should be 1.5V and is the Video IF Bias (reads -.2V)
TP 4 should be 10V and is the 1st Video Base (reads 7.4V)
TP 5 should be .05V and is the Sync Sep Base (reads -.05V)
Again, the +/- 11 volt supply reads quite low at around +/- 8.5v.
Thanks again for all your help.