No red with WG K6100

Hello all:

Have a small problem with a WGK6100 in my Black Widow. I am not getting any red on the screen. I can get red, but I have to turn the screen setting way up - so much in fact that I see the vector trace lines. I thought it might be the transistor in the red portion of the neck board - so I swapped it out - no luck. Reading Greg Woodcock's repair faq on Gamearchive, he said:

No red; check:
      on neck board:
         R500 (open)
         R502 (shorted to nearby component)
         R510 (open)
         R511 (open or wrong value)
         R520 (open; red color can be seen but is very weak)
         R529 (open or wrong value)
         broken wire at R517 control

All are fine with the exception of R529. The schematics say it should be a 12K ohm resistor. But mine reads around 3K. I checked R530 and R531 (which should also be 12K according to the schems) - they read around 3K also. Finding this a bit odd - I checked the resistors on the neck board on my Tempest and they also read around 3K. So I assume that they resistors are correct. Just curious why they differ from the manual so.

Anybody have any ideas as what else I should check? I have a feeling the red gun needs to be boosted - but before I have that done I wanted to check with somebody else first. Thanks!

Walt
   

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Received on Sun Feb 27 13:50:19 2000