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NLG Users Repair Logs and Other Ramblings. Request your very own topic. Just ask any site staff. => Channelmaniac's Arcadecomponents' Old School Repair Logs => Topic started by: channelmaniac on May 04, 2014, 06:57:30 PM
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Model: Battle Garegga
Symptoms: Flickering motion graphics
Player and enemy graphics flicker. Resoldered surface mount chip at location U30 and tested the board.
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Model: Sorcer Striker
Symptom: No audio and a blown cap
A note sent with the board said a cap had been blown by a faulty power supply in the cab.
Replaced 8 caps, the MB3730 audio amp IC, an LM324 op amp, and an LM358 amplifier IC. Every chip powered by +12v was bad and needed replacing. Luckily the 12v supply was only needed for the audio amplifier section of the game.
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Model: Battle Garegga
Symptom: Sound Section issues
Board came in with the description of "clean up sound section." Replaced 6 electrolytic capacitors, 1 audio amp IC, removed/reinstalled 2 poly caps, and replaced 2 shorting jumpers with correct resistors to keep the amp from running too hot. Installed mounting hardware for the amplifier IC and tested the game.
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Model: Battle Garegga
Symptoms: Flickering motion graphics and vertical streaking of all graphics
Player and enemy graphics flicker. Resoldered surface mount chip at location U30 and tested the board. Replaced a bad 74273 in the video output circuit to fix the streaking