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John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum > Arcade and Pinball Discussions > Beginner's Help Corner > 4900 brightness
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Author Topic: 4900 brightness  (Read 3066 times)
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qrulz
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« on: October 15, 2015, 08:24:50 am »
How do I adjust the brightness on the WG 4900 in my Qbert?
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« Reply #1 on: October 15, 2015, 11:14:18 am »
Quote from: qrulz on October 15, 2015, 08:24:50 am
How do I adjust the brightness on the WG 4900 in my Qbert?

On the flyback, there are two knobs. One is screen, the other is focus. The screen pot is for brightness. The screen pot should be the lower pot.

There is also a black level pot on the PCB.

Consult this for further clarification:

http://pounceatron.dreamhosters.com/games/krull/WG-4901.pdf
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