arcade.shoggoth.com - Repair Log

Repair Log - Centipede

Game Room
Restorations
In Progress
Unusual PCBs
Repair Log
- Astro Fighter
- Bosconian
- Centipede
- Defender
- Donkey Kong
- Galaga
- Gauntlet
- Qix
- Satan's Hollow
Test Bench
Gone But Not Forgotten
For Sale
Links
Contact

Home

The Monitor

The monitor in this game was an Electrohome G07. There was no HV, and the fuses were blown. On this model of monitor, this is most often a bad flyback and bad HOT (horizontal output transister). They're pretty cheap to replace, so I popped in some new ones, re-capped the monitor, and it was as good as new.

The Power Supply

The fuses on the power supply block kept popping. I checked the four diodes used as a bridge rectifier on the Audio/Regulator II, and they had shorted. I replaced them.

The resistor R30 was burnt to a crisp. This is almost always caused by a bad contact between the PCB and the edge connector. I replaced R30 and replaced the pins in the edge connector.

Finally, just for preventative maintenance, I bought an A/R II repair kit from Bob Roberts and installed it.

The PCB

The PCB was dead, didn't display anything. I took the easy way out and got a new one from eBay.

See also:

Last Modified: 12/07/01