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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 August 06, 2018, 09:47:28 PM

Title: EPOS Games
Post by: channelmaniac on August 06, 2018, 09:47:28 PM

Model: The Glob (Pac-Man upgrade)Symptom: Locks up
Replaced bad U2 and U3 ROMs and tested. The original EPROMs suffered bit rot.

Title: Re: EPOS Games
Post by: channelmaniac on June 20, 2020, 11:07:14 PM

Model: The Glob (Pac Man upgrade)
Symptoms: Leaking capacitors, broken chip

Replaced the 2 main filter capacitors and cleaned the old electrolyte from the PCB. Replaced missing ROM at 6F and broken Bipolar PROM at 1M. Tested. Board had no sync. Replaced bad 74LS161 to restore horizontal sync and 74LS08 to restore missing composite sync. Board would not boot. Replaced bad Z80 CPU and tested.