Nintendo Arcade

[channelmaniac]

Model: Donkey Kong
Symptom: Deconvert Special Forces back to DK. Screen rolls.

Replaced bad pots to fix screen rolling issue. Removed daughter board, graphics ROMs, color ROMs, 3 Bipolar PROMs, and removed 2 soldered jumpers. Installed new Z80 and Sound CPU sockets as the square pins on the daughterboard damaged them. Installed 4 newly programmed Program ROMs, 2 Sound ROMs, 2 Color ROMs, 4 Graphics ROMs, and 3 Bipolar PROMs.  Tested. Board had bad jump sounds. Patched 2 cut traces on the 4049 IC in the jump sound section and tested.

[channelmaniac]

Model: Punch Out
Symptom: Dead

Replaced missing 74LS14 on the CPU board /RESET line. Replaced bad CPU. Board powered up but was missing colors. Replaced a broken PROM socket at 8F and a bad PROM at 8E on the BAK PCB. Replaced broken transistor on the counter output circuit. Tested.

[channelmaniac]

Model: Donkey Kong 3
Symptom: No blue on display

Replaced bad 82S129 PROM at 1C on the CPU board. Tested.

[channelmaniac]

Model: Vs. Super Mario Bros
Symptom: Red screen, graphic corruption, reboots.

Replaced all 12 28-pin and all 4 40-pin sockets as they were corroded. Patched a gouged trace on the bottom of the PCB going to ROM 8B's control line. Reprogrammed the ROMs as they had been partially erased by exposure. Replaced the ROM at 6C as it failed to reprogram. Installed 2 missing transistors to restore the Green and Blue color outputs. Tested.

[channelmaniac]

Model: Vs. Super Mario Bros
Symptom: No sync, reboots

Replaced all 12 28-pin and all 4 40-pin sockets as they were corroded. Patched 6 battery damaged traces between the ROMs at 1A and 1B and 1 damaged trace between the ROMs at 2A and 2B. Reprogrammed the ROMs as they had been fully erased by exposure. Replaced a missing capacitor in the SYNC output circuit to restore video sync. Tested.

[channelmaniac]

Model: Vs. Castlevania module
Symptom: ROM Error on boot.

Reprogrammed the EPROM as it had been partially erased by exposure. Straightened a bent pin and tested.

[channelmaniac]

Model: Playchoice 10
Symptom: Garbage on screen

NES subsection was fine. The Z80 subsection had garbled junk on screen.

Replaced 74LS42 cartridge selector IC and patched one damaged trace. Tested.

[channelmaniac]

Model: Donkey Kong
Symptom: Dead. Garbage on screen.

Cleaned edge connector with a fiberglass pencil. Replaced bad Z80 and the corroded CPU socket. Reprogrammed the corrupted ROM at 5E. Tested. Board would attempt to play but had text garbage on screen and the girders were corrupt. Replaced 2x 2114 RAM chips and tested - no sound. Replaced corroded sound CPU socket and reprogrammed the Sound Program and Sound Sample ROMs as they were blank. Tested.

[channelmaniac]

Model: Punch Out
Symptom: Missing computer character

Replaced corroded power and video connectors on CPU board and the power and video cables. Symptom would come and go if board was flexed. Found 2 bodge capacitors next to C62 that were touching. Moved capacitors apart and tested.

[channelmaniac]

Model: Super Punch-Out
Symptom: Missing player character

Character ROMs had no output. Pin 22 was stuck high on each. The 74 LS139 at 6J was missing the G (Control) input on pin 15. Replaced 74LS04 at 6E and tested.

[channelmaniac]

Model: Donkey Kong
Symptom: 6 screens on display

Replaced bad 74LS04 in clock divider circuit. Tested.

[channelmaniac]

Model: Donkey Kong
Symptom: Missing characters

Board had no vertical sync. Replaced the VPOS pot. Replaced broken CPU socket. Picture had horizontal lines through it and no characters. Cleaned legs on the ROMs at 3N and 3P to fix the lines. Replaced 74LS283 chips at 7J and 7K to fix the character issues. Tested. Board had no digital sound. Cleaned sound CPU and both sound ROM legs. Replaced bad 6MHz crystal and tested. Digital audio was there, but was very low. Replaced OpAmp at 7K and tested.

[channelmaniac]

Model: Donkey Kong
Symptom: Dead, garbage on screen

No sync. Replaced both HPOS and VPOS pots to fix sync. Cleaned ROMs at 3N and 3P to fix horizontal lines across screen. Colors were incorrect. Replaced incorrect PROMs at 2N on the video board and 2F on the CPU board. This DK board was a conversion back to DK from "Herbie at the Olympics." Replaced broken CPU socket and broken ROM sockets at 5A and 5B. Reprogrammed bit-rotted program ROMs. Socketed and tested the DMA controller IC. Replaced Fujitsu 74LS04 @ 6D and 74LS259 chips at 5H and 6H. Board would now boot and clear the screen, but stop there. Replaced bad RAM at 4A and tested. No digital sound. Cleaned sound CPU and sound ROM legs. Reprogrammed bit-rotted sound ROMs and tested. Jump sound was stopping very short of the full sound. Replaced 4 physically damaged capacitors and tested.

[channelmaniac]

Model: Donkey Kong
Symptom: Missing parts

Replaced bad V-POS and H-POS pots. replaced missing 5A and 5B Program ROMs. Cleaned legs on the Program ROMs at 5C/5E and reprogrammed them. Replaced bad Sound ROM at 3H and missing Sound ROM at 3F. Board booted but had no sound. Replaced an 8088 CPU in the Sound CPU socket with the correct 8039 CPU. Tested. Graphics flickered colors and flickered to some different graphics. Replaced bad graphics ROM at 7C that had a failure reading properly on pin 9 when in the EPROM programmer. Cleaned the Color ROM legs. Tested.