R420 open?
Matt Rossiter wrote:
>Hey all,
>
>I brought home a Centipede that had a dead monitor. I replaced the caps and
>installed a new HV unit. It now powers up, but only displays the right half
>of the picture with a line running down the middle -looks like a typical xy
>failure but on a raster game. So, basically I have a vertical deflection
>problem.
>
>Here's what I've done so far...
>
>1) Tested the transistors in the vertical output circuit - X401 and X402 -
>they test fine out of circuit. I believe the signals are good too when
>testing in circuit.
>2) FR401 (the fusible resistor) is fine.
>3) Checked the signals on IC 501 and they look good. Swapped in a new IC
>just to be sure.
>4) Checked other resistors and capacitors within the vertical output
>circuit.
>
>I just can't seem to trace down the problem, but it could be something
>simple I'm missing. Has anyone else run into a similar problem?
>
>
>Matt
>
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>
>
>
>
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Received on Mon Jul 28 05:14:07 2003
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