New Life Games LLC
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, 06:56:44 PM
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Model: Moon Alien Part 2
Symptom: Graphic corruption
Starfield was missing and backgrounds were solid color bars. Explosions were missing colors.
Signal /LSD0 was missing on IC 3L. Replaced bad 74194 at location 2K as it's output was missing. Starfield returned and colored bars went away. Replaced incorrect chip installed as motion RAM with the correct replacement IC to fix blank explosions. Recapped audio section. Game played but the colors were wrong. Replaced an incorrect color PROM at 6L and tested.
NOTE: This board uses 74S301 bipolar RAMs. An Intel 3107 is a direct replacement for these.
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Model: Crazy Climber
Symptom: Green vertical lines on screen
Replaced bad 2125A RAM at 8J. Tested board and found some controls not working. Replaced cracked resistor pack at RM2 and tested.
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Model: Seicross
Symptom: No sound
Replaced broken volume control and bad LM3900. Tested. Installed 2 missing screws, standoffs, and feet. Retested.
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Model: Dangar UFO Robo
Symptom: Graphic corruption
Replaced 4 corroded interconnect headers and 2 ribbon cables. Tested.
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Model: Dangar UFO Robo
Symptom: Graphics corruption
Replaced bad CPU socket and tested. Recapped PCB and retested.
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Model: Terra Cresta
Symptom: Dead, missing parts.
Replaced 2 missing ribbon cables, recapped the PCB (2 caps broken, 2 leaking), and installed missing mounting hardware. Tested.
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Model: Crazy Climber
Symptom: Control issues
Cleaned edge connector to fix control issues. Replaced missing audio amp chip and 3 capacitors in the audio output section. Checked all socketed ROMs and RAMs. Cleaned the video output connector to fix red output issue. Tested.