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, 05:43:18 PM

Title: Jaleco Games
Post by: channelmaniac on May 04, 2014, 05:43:18 PM

Model: Psychic 5
Symtpom: Dead. Power supply fluctuates and/or shuts down.

Checked board for shorts. Could not find any. Checked the 5v line to the 2nd board and found it went to ground. Flipped the 2nd board over for proper orientation and tested game.

The way the connectors are wired if the board is plugged in backwards it will swap +5v and ground wires. The only thing that saved this board from damage was that it was plugged into switching power supplies that had automatically shut down.

Title: Re: Jaleco Games
Post by: channelmaniac on May 04, 2014, 05:43:33 PM

Model: Psychic 5
Symptom: Background graphics are corrupt.

Replaced a bad 6264 SRAM IC on the video board and tested.

Title: Re: Jaleco Games
Post by: channelmaniac on February 11, 2017, 01:24:56 PM

Model: P-47
Symptom: No audio

Audio would start to fade in a few minutes after the board was powered on. Recapped the audio section and tested.

Title: Re: Jaleco Games
Post by: channelmaniac on July 08, 2021, 07:00:16 AM

Model: P-47
Symptom: Dead

Board would partially boot enough to clear the screen, but CPU 2 was stuck in reset. Replaced cracked 74LS74 chip and tested. The LS74 appeared to have failed catastrophically internally and cracked open.

Title: Re: Jaleco Games
Post by: channelmaniac on January 07, 2022, 08:35:26 PM

Model: Naughty Boy
Symptom: No red

Patched a dead trace in the red output section of the PCB and tested.