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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, 06:58:38 PM
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Model: Sky Soldiers
Symptom: Corrupt Graphics
Background graphics and enemy ships were displayed with black dots that looked like a 'waffle' pattern. Replaced bad SRAM IC at L6. Tested.
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Model: Twin Cobra
Symptom: Missing graphic elements
Elements would reappear if the board was flexed or tapped.
Replaced bad socket on the PROM at location A25. Resoldered 7 bad solder joints. Cleaned legs on one EPROM. Tested.
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Model: Sky Shark
Symptom: Flickering graphics
Replaced 2 physically damaged 2148/2149 RAMs and tested.
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Model: Twin Cobra
Symptom: Doubled up screen
Repaired a gouged trace in the video memory circuits. Tested.