Author Topic: Konami Games (Read 44861 times)

channelmaniac · « **Reply #100 on:** December 27, 2020, 10:59:46 PM »

Model: Track & Field
Symptom: Missing backgrounds

Replaced 3 sockets and 1 rotted legged EPROM. Cleaned the legs on the other 2 EPROMs and tested.

channelmaniac · « **Reply #101 on:** December 28, 2020, 01:39:38 AM »

Model: Track & Field
Symptom: Dead

Replaced 2 bad Fujitsu 74LS244 chips that had one dead output each. One was buffering address lines on the CPU and the other signals to the top board. Game booted but had no sound. Replaced a bad 2114 in the sound circuit and had working sound, but very low audio. Recapped the audio section and replaced the audio amplifier IC. Tested.

channelmaniac · « **Reply #102 on:** December 29, 2020, 01:30:43 AM »

Model: Gyruss
Symptom: Dead

Cleaned the legs on the custom ICs and tested. Game tried to boot, but failed. Installed the Gyruss test ROM and found ROM 2 on the main CPU was bad. Cleaned the legs on the Program ROMs and fixed that error. Next was the shared RAM at 17C and the Konami 1 CPU failure. The RAM was good. Cleaned the custom CPU's legs. Replaced the CPU socket, the Fujitsu 74LS138, and one of the 74LS157s that showed a bad pin on the logic comparator. Still failed. Replaced multiple Fujitsu 74LS245 ICs in that circuit and one bad 2114 RAM. Game booted but randomly lost sound. The SOUND ON signal was not making it to the top board. Replaced bad ribbon cable and tested.

channelmaniac · « **Reply #103 on:** December 29, 2020, 01:52:05 PM »

Model: Time Pilot 84
Symptom: Dead

Game came up with flickering garbage on the screen. The way it flickered appeared to be an open trace issue somewhere. Cleaned all the socketed chip legs and replaced a Fujitsu 74LS00 with dead outputs. Flickering gone, but the system still would not boot. Replaced three damaged caps in the reset circuit and noticed the 2 CPUs were socketed backwards - they face the opposite direction from all the other chips on the PCB. Board booted but had sprite issues with placement and appearance. Replaced a broken socket and a ROM with a detached ground leg in the sprite section. Appearance was fixed, but motion placement was off. Found and patched 4 gouged traces and tested the game.

channelmaniac · « **Reply #104 on:** December 30, 2020, 01:27:10 AM »

Model: Time Pilot
Symptom: Dead

Replaced 1 082 and 2 083 customs and their sockets because of pin rot. Tested. Replaced 2 1000uf caps on the audio board, cleaned the edge connector, and retested.

channelmaniac · « **Reply #105 on:** December 30, 2020, 01:29:33 AM »

Model: Aliens
Symptom Dead

Board had a note "works sometimes"

Fixed a gouged trace under the custom CPU and the board would boot but video was unstable. Cleaned the edge connector to fix the video issue. Board would boot to a RAM error and reboot until it was satisfied the RAM was OK, about 3 or so cycles. Resoldered one side of a custom chip to fix popped legs and the RAM error. Ran the extended self tests - all mask ROMs showed good, but the coin 1 input was stuck on. Replaced a bad 74LS253 and tested the game by playing through to the end.

channelmaniac · « **Reply #106 on:** December 30, 2020, 09:57:30 PM »

Model: Jungle Hunt
Symptom: Missing sounds

Cleaned the top board and ROM board. Replaced 5 40-pin sockets, 4 sound chips, and 1 Z80 CPU that had corrosion damaged legs. Tested.

channelmaniac · « **Reply #107 on:** December 30, 2020, 10:01:47 PM »

Model: Kick Start Wheelie King
Symptom: Dies during game play

Verified issue. Reprogrammed the program and graphics ROMs and tested.

channelmaniac · « **Reply #108 on:** January 03, 2021, 01:39:23 AM »

Model: Track & Field
Symptom: Dead. Garbage on screen.

Board would not boot Shoestring's test ROM. Checked CPU, customs, and first program ROM legs and all were clean. Inspected the PCB and found a solder smear between 2 vias shorting 2 data bus lines to the CPU. Fixed the solder smear and tested the game. It would play but played incorrect music and had no digitized audio. Replaced bad ribbon cable to fix the incorrect music and patched 2 damaged traces to restore the digitized audio. Cleaned the edge connector and tested.

channelmaniac · « **Reply #109 on:** January 16, 2021, 08:16:21 PM »

Model: Vendetta
Symptom: Fails self tests on boot

Game failed sound subsystem tests. Cleaned the edge connector, patched broken trace, and tested.

channelmaniac · « **Reply #110 on:** February 22, 2021, 11:37:32 PM »

Model: Track & Field
Symptom: Line and blocks in graphics

Cleaned the background and sprite ROM legs and tested.

channelmaniac · « **Reply #111 on:** February 22, 2021, 11:51:13 PM »

Model: Time Pilot '84
Symptom: Dead

Board had a white screen with little flickers down the left side.

Cursory exam found 3 of the 4 program ROMs toast- rodent pee. Replaced 4 sockets and 3 program ROMs. No change. CPUs were dead and had no activity on the clocks. Replaced Fujitsu 74LS04s at 13F and 13H. Had clocks but no read/write line activity. 2 new 68A09E CPUs. Still the same, but now had activity on proper CPU lines. No activity on the other side of the 74LS245s at 11J and 11F. Replaced the 74LS367 and LS244 on the address lines of the main CPU as they were rodent damaged. Now had activity, but no booting. Replaced bad 74LS02 at 15F and started hunting down dead gates. LS04 at 6F, LS153 at 3E and 3F and now had garbage on the screen instead of a white screen.

Replaced bad RAMs at 4F, 8B, 8C, 9B, and while the one at 9C was OK, I replaced it as well. The data bus was stuck on the RAM at 9F so I replaced the LS245s at 10F and 10G. Still no boot. Found a dead trace between the LS138 at 12J and the LS139 at 9F and patched it. Board tried to boot but had no text/backgrounds. Replaced LS377 at 2G. Board now tried to boot but failed the Sub CPU tests. Replaced bad ROM at 10E. It wouldn't reprogram. Game booted but had no sprites. Replaced bad 74LS377 at 12D. Game booted and had sprites but would continuously count up credits. Replace 74LS245 at 1B. Plays now, but has vertical lines in some sprites.

Board died during burn-in. If the main CPU data bus was touched with a logic probe it would try to boot. This one was a bitch and all the chips on the data bus were good. Looked for more dead gates, none were found. Started checking Fujitsu logic with an ohmmeter and found 86 ohms to +5v on pin 15 of the 74LS139 at 9G. Replaced it and the 74LS138 that drove it at 12J. Checked the 74LS139 at 16D and found a pin that measured 1.6K to +5v. Replaced it and that fixed the lines in the sprites.

Looked at the sound board. It had CPU activity, but no output. Removed the LA4460 sound chip to discover it was installed backwards by a prior tech. Replaced the amp chip and the 3 electrolytic caps in the audio section and played a few games.

channelmaniac · « **Reply #112 on:** March 15, 2021, 07:51:49 PM »

Model: X-Men
Symptom: Errors on boot

Board had 4 errors, all related to the sound subsystem. Replaced the sound hybrid module with an aftermarket one and tested.

channelmaniac · « **Reply #113 on:** March 17, 2021, 09:32:04 AM »

Model: X-Men
Symtpom: Low audio and static

Replaced the hybrid to find now has audio, but still has very bad static. Traced it back to the output of the original DAC on the hybrid module. Replaced the DAC and tested.

channelmaniac · « **Reply #114 on:** March 25, 2021, 06:06:50 PM »

Model: Simpsons
Symptom: Corrupt graphics

Tested and found no signal on pin 8 of one of the 74LS374 ICs. Patched the dead trace and tested.

channelmaniac · « **Reply #115 on:** March 27, 2021, 12:11:56 PM »

Model: X-Men 6 Player
Symptom: No sound, no picture from JAMMA connector

Removed solder globs from JAMMA connector and cleaned the edge connector. Tested and video was OK. Replaced bad sound hybrid and retested.

channelmaniac · « **Reply #116 on:** July 19, 2021, 07:58:40 PM »

Model: Lethal Enforcers
Symptom: No sound

Replaced sound hybrid with an aftermarket one and transferred the custom and DAC ICs over. Tested.

channelmaniac · « **Reply #117 on:** July 21, 2021, 09:50:52 AM »

Model: Simpsons
Symptom: Dead, stuck in watchdog reset

Board had some corrosion on chips.

Found that the trace from the Custom PROM at 11C pin 17 to the 74LS20 at 9D was open. Patched trace. Board would then boot but had an error for the IC at 12C (EEPROM.) Replaced bad 74LS174 at 10D, a Fujitsu chip with floating outputs. Board then booted to a solid white screen. Replaced all 4 corroded Program ROM sockets and cleaned the ROM legs before reinsertion. Tested.

channelmaniac · « **Reply #118 on:** August 20, 2021, 10:43:58 AM »

Model: X-men 6 player
Symptom: Low audio

Replaced sound hybrid module with an aftermarket one. Tested.

channelmaniac · « **Reply #119 on:** September 04, 2021, 10:16:18 PM »

Model: Time Pilot
Symptom: Sparkling sprites and clouds.

Replaced bad ROM 6 and tested.

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Author Topic: Konami Games (Read 44861 times)