E-2000 "7" Error (M7)

[shane]

When I start machine, I get a quick 6 in the far right LED followed by a 7 in the far left window indicating a M7 chip fault.

- I replaced the battery with a Li-ion rechargeable 3.7V - still get same code
- I reseated the M1, M2, M3 and M7 chips - still get same code

- Test Clips on MPU measures 5V
- Test Clips on I/O measures 5V
- Test Clips on PS measures 5V (+5), 7V (ZC) and 9V (+UR)

What should my next steps be to address this error code?

Thanks,

Shane

[GOS]

you have a e1000 board - the board with the battey on it - try reseating that board - check the 5101 proms on that board the fail

[Badbaud]

Solder a jumper across the contacts of RLY1.

Remove the RAM board and clean the mounting pins on the MPU board.

[shane]

Thanks for the quick replies GOS and Badbaud.

- How do I check the 5101 proms?
- Can I use 90% alcohol and Q-Tip to clean the mounting pins
- What is the purpose of jumping the contacts on the RLY1

Thanks again.  I'm new to all this and appreciate the help.

Shane

[Badbaud]

RLY1 is part of a low voltage detect circuit and due to old components will start stuttering for no reason causing the game to reset randomly.
Jumper the relay contacts to bypass those circuit interruptions.

[shane]

Should I jumper the contacts with wire or just solder across the contacts?

[Badbaud]

Jump the two outside legs of the relay together with a wire.

DO NOT jump the two inside legs, those are the relays coil and have voltage on them.