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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, 06:55:18 PM
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Model: Gals Panic II
Symptom: No red output
A cursory exam of the board revealed 2 1/8 watt resistors, a 750 ohm and a 1k ohm, that were burnt. Replaced the resistors and checked the board. Still no red. Traced it back to the custom Kaneko hybrid IC, V-08D, on the red line. Replaced the hybrid with one from a donor board to finish the repair.
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Model: Gals Panic S
Symptom: Scratchy sounds and high pitched noises in audio.
Game had leaking capacitors on it. Recapped the audio section and tested.
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Model: Air Buster
Symptom: Sparkles on screen. Screen flickers badly
Replaced a physically broken 1K 1/8w resistor at location R1. This was in the video RAM circuitry. Desoldered the GAL PR-501 at location J13 and copied it to fix another board.
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Model: Air Buster
Symptom: Dead
Straightened bent pins on custom surface mount chip at C/D18 and reflowed IC. Replaced bad Z80 at K/L14. Replaced bad EPROM at K/L15. Replaced bad PAL at J13. Tested.
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Model: DJ Boy
Symptom: Dead
Replaced missing program ROM with one programmed with code from the MAME dumps. Board would boot but had no audio. Removed clipped leads from the missing LA4460 audio amp IC, installed a new amp IC, and recapped the audio section. Tested.