Technos Games

[channelmaniac]

Model: Double Dragon
Symptom: Incorrect colors

This board was tough to track down as it was missing signals, yet none were missing. Replaced IC67. Only its lower 4 bits were in use and they were tied to the lower four bits of IC68 which was why it was hard to track down. They were both Fujitsu 74LS245 ICs so they were both replaced.

[channelmaniac]

Model: WWF Superstars
Symptom: Smoked inputs

JAMMA harness was connected backwards and the board smoked near the connector.

Replaced 2 combination capacitor/resistor SIPs in the input circuit and tested. Replaced a 100uf cap on the back corner of the board that had one of its legs half ripped out. Retested.

[channelmaniac]

Model: Double Dragon 3, The Rosetta Stone
Symptom: Distorted sound and bad sync.

Replaced 2 broken capacitors in the audio section to fix the sound. Replaced two broken power filter caps. Cleaned the dirty edge connector with a fiberglass pencil to fix the sync issue. Tested.

[channelmaniac]

Model: Double Dragon
Symptom: Dead

Replaced bad EPROM 21a-1, reset DIPs, replaced multiple physically damaged caps, and tested.

[channelmaniac]

Model: WWF Wrestlefest
Symptom: Corrupt video

Removed, repaired, and reinstalled a custom with bent pins. Reflowed 2 other custom ICs. Repaired 4 gouged traces under text character ROM socket. Repaired broken solder joints on 2 background ROMs. Tested.

[channelmaniac]

Model: Double Dragon II
Symptom: Garbled graphics. Game crashes.

Board had corrosion issues in the sockets.

Replaced the 4 50-pin board interconnects and the 2 cables. Replaced 12 sockets on the CPU board and cleaned all the ICs before reinsertion. Did the same with 8 ICs on the video PCB. Board booted but the graphics for "The Revenge" was corrupt and in attract mode the characters were garbled. Address line A11 was stuck high on the graphics ROMs. Replaced a bad 74LS273 IC to fix that. During attract mode one of the enemy characters was corrupt. Replaced bad mask ROM on the video PCB and tested. Replaced four physically damaged capacitors and retested.