Konami Repairs

[channelmaniac]

Model: Simpsons
Symptom: Plays blind - random garbage on screen.

Board would sometimes work perfectly then on next power up be scrambled again. Resoldered damaged pins on 053247 at 7J and repaired 1 shorted trace where a solder pad was mashed into a neighboring trace. This helped but did not fix it. Replaced missing 051550 hybrid IC and tested. Board worked except was missing sounds 01 through 28. Found a factory solder bridge between pins 23 and 24 of 053260 at 3E. Removed the bridge and all the sounds are now working. Ran self tests and found the P4 down control stuck low. Replaced a bad 005273 hybrid module at S37 to fix. Played the game all the way through to check it out.

[channelmaniac]

Model: Hyper Sports
Symptom: Dead. Graphics corruption. Foreground AND background.

This is a board from hell. Not sure what happened to it but it HAD to be a power surge of some kind.

Replaced the 74LS04 on the CPU board to fix the dead CPU issue. On the video board, EPROM C26 was bad. Replaced. Signals on the address lines of C11 to C18 were incorrect. Replaced F15 and F16

Working backwards from the video outputs I found:
Output pins stuck on MOST LS157 ICs. Replaced C17, D17, E17, D16, and A4
Output pins stuck on D11, E11, E12, G12, E13, F13, G13, and F14.
Pins racing on D9, E9, E10, H10, and J10.

All of those chips tested bad on my EPROM programmer.

Now I have graphics but have some sparklies around border graphics and a missing title screen to track down. Bad LS377 at H12 on the video board. Replaced and the board is now fixed.

[channelmaniac]

Model: Hyper Olympics 84
Symptom: Dead

CPU board tested good by substitution. Replaced bad 504 and 082 custom Konami chips. Board now runs but has corrupt player graphics. Signal DM7 (pin 11 of H3) is stuck low causing the corruption. The chip at H3 and the chips it drives at J4 and H4 are all good. The CLK4 signal is incorrect. A check of a good board shows pulses in groups of 3 and the bad board shows pulses in groups of 2... Replaced a bad 74LS20 at location E16 to finish the repair.

[channelmaniac]

Tip: Konami custom chip replacements

Konami used some PC daughter boards to replace custom ICs.

PWB 402034 = Custom IC # 501
PWB 4000206A = Custom IC # 504

[channelmaniac]

Model: Mystic Warrior
Symptom: RAM Failure

Self test showed that 9E, 10E, and 11E had failed. Inspected the board and found 3 bent/shorted pins on the custom IC 054338 at 10C. Fixed the pins and tested the board.

[channelmaniac]

Model: Jail Break
Symptom: Audio issues

Reseated the audio CPU as it was partially out of the socket. Board would not accept any coin inputs for coin slot 1. Replaced a custom 005273 hybrid and the 74LS253 IC it was feeding. Tested game.

[channelmaniac]

Model: Hyper Olympics (bootleg)
Symptom: Short

Short circuit was caused by an extra ground wire not listed on the pinouts in the manual. This was shorting the -5v from the power supply to the ground through the Konami to JAMMA adapter. Cut the trace to the edge connector, replaced a physically damaged capacitor in the audio section, and tested.

[channelmaniac]

Model: Warzaid
Symptom: No sync

Replaced back chip a U31 and tested.

[channelmaniac]

Model: Bucky O'Hare
Symptom: Up control stuck on

Replaced bad hybrid module 005273A and a bad 74LS257 IC. Jumpered 1 bad trace and tested.

[channelmaniac]

Model: The Simpsons
Symptom: EEPROM Error and no red output

Removed a solder splash bridge between pins 15 and 16 of the IC at 11D and reset the EEPROM data to fix the error. Replaced the custom hybrid 052535 on the red output to restore proper colors.

[channelmaniac]

Model: The Simpsons
Symptom: Crashes Randomly

Board would pass self tests and play in attract mode but would crash randomly when playing the game and when running ROM tests from the menu. Replaced a mix-matched set of program EPROMs that were 120 to 200ns with 4 matched 100ns EPROMs. Board ran and passed all self tests. Played the game through to the end to test.

The 2 200ns EPROMs were too slow for the CPU and were causing random crashes..

[channelmaniac]

Model: Teenage Mutant Ninja Turtles
Symptom: RAM/ROM errors

Board had physical damage. Fixed bent pins on 3 custom ICs. Resoldered one side of 2 custom ICs to fix solder wipe shorts. Repaired 9 gouged traces. Tested.

[channelmaniac]

Model: Various
Tip: Konami 007232 Pinout

This is the D/A Converter IC used in many Konami games for sound effects along side the YM2151 FM music synthesizer chip.

Here is a preliminary pinout based on a Super Contra game that was pinned out. There are still unknown pins on the IC and missing functions that need to be mapped to it such as R/W and /IRQ. It is also missing a 3rd select line for ROM access select.

Code:

1 - CPU Data 0
2 - CPU Data 1
3 - CPU Data 2
4 - CPU Data 3
5 - CPU Data 4
6 - CPU Data 5
7 - CPU Data 6
8 - CPU Data 7
9 - Output Channel 1 - These connect to the 007340 DAC
10 - Output Channel 1
11 - Output Channel 1
12 - Output Channel 1
13 - Output Channel 1
14 - Output Channel 1
15 - Output Channel 1
16 - Gnd
17 - Output Channel 2 - These connect to another 007340 DAC
18 - Output Channel 2
19 - Output Channel 2
20 - Output Channel 2
21 - Output Channel 2
22 - Output Channel 2
23 - Output Channel 2
24 - ROM Data 7
25 - ROM Data 1
26 - ROM Data 8
27 - ROM Data 2
28 - ROM Data 6
29 - ROM Data 3
30 - ROM Data 4
31 - ROM Data 5
32 - Vcc

33 - ROM A0
34 - ROM A1
35 - ROM A10
36 - ROM A2
37 - ROM SELECT A1
38 - ROM A3
39 - ROM A4
40 - ROM A11
41 - ROM A5
42 - ROM A9
43 - ROM A6
44 - ROM A8
45 - ROM A7
46 - ROM A13
47 - ROM A13
48 - Gnd
49 - ROM A14
50 - ROM A15
51 - CLOCK (3.597Mhz)
52 - ?
53 - ?
54 - ?
55 - ROM SELECT A2 (Signal inverted on Super Contra by an LS04)
56 - Vcc
57 - Vcc
58 - CPUA0 (Signal inverted on Super Contra by an LS04)
59 - CPU A1
60 - CPU A2
61 - CPU A3
62 - ?
63 - /RESET
64 - Vcc

ROM SELECT signals are used by the 74LS138 on the ROM board of the Super Contra game to select one of 8 Sound ROMs

[channelmaniac]

Model: Super Contra
Symptom: Garbled Audio

This one took a long time to track down. Replaced female socket connector between the CPU board and the ROM board. Tested.

[channelmaniac]

Model: Teenage Mutant Ninja Turtles
Symptom: RAM Error

Replaced 1 SRAM, 1 74LS245, and 1 74LS32 IC. Tested.

[channelmaniac]

Model: TMNT - Turtles in Time
Symptom: RAM Error

Removed foreign substance from the board and patched 1 trace. Tested.

[channelmaniac]

Model: Time Pilot 84
Symptom: Graphic corruption

Replaced a bad 74LS273 and 74LS86 to fix the background graphics corruption. Replaced a bad 74LS273 to fix the player/enemy sprite corruption. Tested.

[channelmaniac]

Model: Time Pilot
Symptom: Dead

Board would boot if powered on multiple times. Recapped reset circuit and tested.

[channelmaniac]

Model: Tutankham
Symptom: Dead

Board would boot if powered on multiple times. Recapped reset circuit and tested.

[channelmaniac]

Model: Loco-Motion
Symptom: Reboots while playing. No audio.

Caps had leaked electrolyte out the negative leads. Removed caps, cleaned board, and recapped. Replaced 2 bad Program EPROMs. Audio IC had every pin clipped. Soldered on new leads and reinstalled. Tested board.

[channelmaniac]

Model: Teenage Mutant Ninja Turtles (TMNT)
Symptom: Low audio and distortion

Replaced bad audio pot, recapped audio section, and tested.

**edit**

Board was sent back for the same problem. Found that the problem was worse the longer it was on and that pin 12 of LM324 at U91 had spurious signals on it when the sound was going bad. Replaced 3 tantalum capacitors at C7, C12, and C8. Played through the whole game to test.

[channelmaniac]

Model: Life Force
Symptom: Dead, garbage on screen.

Replaced bad 74LS244 at 20D and 19J on the CPU board to fix it. Replaced bad 74LS04 at 10C and 74LS86 at 9D on the video board to finish the repair.

[channelmaniac]

Model: Nemesis
Symptom: Dead

Replaced 2 74LS245 ICs and 2 SRAMs on the CPU board. Replaced 1 74LS273 IC on the video board. Tested.

[channelmaniac]

Model: The Simpsons
Symptom: Dead

Removed 1 short from the bottom of the board where a trace was smeared over to the adjacent plated thru hole. Board booted but reported a bad RAM. Patched a damaged trace and tested.

[channelmaniac]

Model: X-Men
Symptom: No audio

Recapped the audio hybrid module and patched one trace on it. Tested.