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Author Topic: Konami Games  (Read 44263 times)

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Offline channelmaniac

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Re: Konami Games
« Reply #40 on: May 07, 2014, 07:01:03 PM »
Model: TMNT - Turtles in Time
Symptom: RAM Error

Removed foreign substance from the board and patched 1 trace. Tested.
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Re: Konami Games
« Reply #41 on: May 07, 2014, 07:01:15 PM »
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.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #42 on: May 07, 2014, 07:01:28 PM »
Model: Time Pilot
Symptom: Dead

Board would boot if powered on multiple times. Recapped reset circuit and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #43 on: May 07, 2014, 07:01:42 PM »
Model: Tutankham
Symptom: Dead

Board would boot if powered on multiple times. Recapped reset circuit and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #44 on: May 07, 2014, 07:02:04 PM »
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.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #45 on: May 07, 2014, 07:02:25 PM »
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.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #46 on: May 07, 2014, 07:02:42 PM »
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.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #47 on: May 07, 2014, 07:02:53 PM »
Model: Nemesis
Symptom: Dead

Replaced 2 74LS245 ICs and 2 SRAMs on the CPU board. Replaced 1 74LS273 IC on the video board. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #48 on: May 07, 2014, 07:03:08 PM »
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.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #49 on: May 07, 2014, 07:03:20 PM »
Model: X-Men
Symptom: No audio

Recapped the audio hybrid module and patched one trace on it. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Offline channelmaniac

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Re: Konami Games
« Reply #50 on: May 07, 2014, 07:03:39 PM »
Model: Gyruss
Symptom: No sound. Missing heatsinks. White line on top of screen.

Replaced bad audio amplifier and 4 100uf capacitors. Installed 2 heatsinks. Resoldered pulled cap on IC at A6 and cleaned the legs on the 3 PROMs to fix the video issue. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #51 on: May 07, 2014, 07:03:55 PM »
Model: Track and Field
Symptom: Corrupt graphics and speech.

Cleaned the speech ROM's legs and replaced the corroded socket. Jumpered a gouged trace on pin 2 of the 2128 SRAM chips. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #52 on: May 07, 2014, 07:04:10 PM »
Model: Track and Field
Symptom: Dead

Cleaned pins on the CPU and replaced bad socket. Cleaned pins on the ROMs at A1/A2. Board booted but had corrupt graphics. Replaced a bad 74LS377 to fix the graphics corruption. Graphics were misplaced horizontally and runner would run off the right side of the screen during the long jump on attract. Replaced 74LS08 @ 2F which had a dead output. Replaced 74LS139 at 14D which had a dead output to fix the graphics misplacement. Replaced bad 74LS273 at 13E to fix a background color problem. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #53 on: May 31, 2014, 01:38:10 AM »
Model: Double Dribble
Symptom: Dead. Loud constant beep from speaker

Board had multiple Fujitsu TTL logic failures.

Installed a missing 3.58MHz oscillator at G12. Replaced 74LS74 ICs at B16, B15, A11, D15, and G8, replaced a bad 74LS02 at F9, and replaced a bad 74LS00 at A17. Board would then boot but had missing and garbled graphics. Rearranged the ROMs back into the proper sockets and programmed replacements for I8, and I12. Game looked better, but still had garbled text on the screen. Replaced bad Mask ROM at E12. Player graphics were still corrupted. Replaced bad 4464 DRAM chips at I17 and I18 and board suddenly lost all backgrounds while retesting. Replaced bad 74LS32 at H12 to restore the backgrounds.

Game would play but had corrupt sounds instead of speech. Replaced bad 74LS374 at D7 to restore speech. Ran board through self tests and discovered DIP switch bank 2 was not working. Replaced a bad 74LS244 at H6 to restore DIP switch operation.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Offline channelmaniac

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Re: Konami Games
« Reply #54 on: September 17, 2014, 07:23:39 PM »
Model: Teenage Mutant Ninja Turtles
Symptom: Will not coin up. Player 2 will not move right

Board had attempted repair damage.

Replaced 2 005273 custom SIPs, patched 2 damaged traces, and replaced a bad 74LS253 at location A27. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #55 on: November 06, 2014, 09:15:02 PM »
Model: Sunset Riders
Symptom: Bad ROM at L7, lines in graphics

Straightened shorted bent pin on custom at 15H. Repaired bad trace between ROM at L7 and custom IC at 3J. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Konami Games
« Reply #56 on: November 14, 2014, 04:17:05 PM »
Model: Gyruss
Symptom: Garbage on screen. Physical damage.

Patched 4 damaged traces for data lines on the ROM at 19E. This restored the text and title screen but the globe on the title screen was corrupt and the motion objects were missing but would sometimes flicker in pieces on the screen. Found four dead address lines on the SRAM at 17C. Replaced 74LS157 at 18B to restore video and tested. Game would play but had random corruption on the screen. Replaced the remaining Fujitsu 74LS157 ICs at 17B, 19B, 17A, 17B, and 17C. Tested.

Reset DIP switches to standard from Free Play and board would coin up on power up. Replaced 74LS253 with shorted input at 3H, fixed a burned edge connector trace, and retested.
« Last Edit: November 14, 2014, 04:47:19 PM by channelmaniac »
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Offline channelmaniac

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Re: Konami Games
« Reply #57 on: November 14, 2014, 05:57:18 PM »
Model: Circus Charlie
Symptom: Dead

Cleaned edge connector. Replaced 2 47uf and 1 220uf cap in the reset circuit. Cleaned the legs on 2 graphics ROMs to fix corrupted graphics issues. Replaced bad ribbon cable to fix sound and coin-up issues. Installed missing hardware and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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Re: Konami Games
« Reply #58 on: November 15, 2014, 12:05:23 AM »
Model: Hyper Sports
Symptom: Dead. Garbage on screen.

CPUs are stuck in watchdog. The custom Konami CPU is dead. Replaced 74LS04 in the clock circuit at B3 on the CPU board to fix clock to main CPU. Board had random reboots and garbage on screen. Replaced bad socket on the 085 custom at C5 and cleaned the rusted and tarnished pins on the custom. Board would play but had 2 lines of garbage on screen and some random colored squares. Replaced the RAM at G10 to fix the garbage problem and the RAM at G9 to fix the colored square issue. Reset the DIP switches to clear the high score table and tested. Replaced missing hardware and reassembled the board stack.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Konami Games
« Reply #59 on: December 12, 2014, 11:31:52 PM »
Model: Track & Field
Symptom: Graphic corruption

Logo graphics and player sprites corrupted. Replaced bad 74LS245 at J16 and 2114 RAM at K15. Tested and found background had disappeared and would come back if background image ROMs were tapped. Cleaned legs on the background image ROMs and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

 

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