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(Topic ID: 288674)

Stellar Wars - Troubleshoot Upper Lane Lights

By sworton

3 years ago



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  • Latest reply 3 years ago by sworton
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#2 3 years ago
 
PLG

nplg

Pinside+ Frequent

US Columbus, OH

3y 52,050 53 8

Assuming all connectors are good, no shorts, etc, appears to be a problem in the Lamp Matrix. If comfortable troubleshooting at the board level, see page five of:

https://www.ipdb.org/files/2372/Williams_1979_Stellar_Wars_Schematics_February_1979_low_resolution_and_bleached_paginated.pdf

The attached lamp matrix can help.

SW-Lamps (resized).JPGSW-Lamps (resized).JPG
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#5 3 years ago
 
PLG

nplg

Pinside+ Frequent

US Columbus, OH

3y 52,050 53 8

Comfortable reading a schematic? If so, the driver transistor for Column 3 (appears to be Q67, double check though) needs to be checked with the diode test of a multimeter. A defective transistor can cause the lights to remain on.

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