Is it common to have a loud hum from the speakers on this game? Mine's louder than the hum on my DK. Any way to reduce it?
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there should be a checklist of stuff for Asteroids hum.
i'd start with:
- cap/rebuild the AR; reflow any questionable solder. set voltage to +5 at the main PCB.
- check all resistors and diodes on the AR; i recently fixed a hum by replacing a bad diode.
- replace "big blue" capacitor.
- clean PCB edge connector.
- check molex connector pins. replace any suspect pins, especially on the edge connector molex.
- disconnect the marquee light, the monitor, and the coin door to eliminate them as suspects for bad grounds.
- recap the main PCB.
good luck!
- clean PCB edge connector.
- disconnect the marquee light, the monitor, and the coin door to eliminate them as suspects for bad grounds.
- replace "big blue" capacitor.
- check molex connector pins. replace any suspect pins, especially on the edge connector molex.
- cap/rebuild the AR; reflow any questionable solder. set voltage to +5 at the main PCB.
- replace TDA2002 amplifer ICs on AR board (TDA2003 can be substituted)
- check all resistors and diodes on the AR; i recently fixed a hum by replacing a bad diode.
- recap the main PCB.