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Author Topic: Konami Repairs  (Read 28987 times)
channelmaniac
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« on: September 15, 2008, 09:13:37 PM »

Fixed: TMNT (Teenage Mutant Ninja Turtles):
Symptom: Garbled background and foreground graphics

Repaired 2 gouged traces to fix the foreground objects. Resoldered cold solder joints on the background ROMs to fix background images and score/health display.
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channelmaniac
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« Reply #1 on: September 15, 2008, 09:13:57 PM »

Fixed: Crime Fighters:
Symptom: ROM error and garbled foreground graphics

Pulled the ROM and compared its checksum against the MAME database. ROM was good but the data line was held low. It connected to a Konami custom surface mount chip. Swapped out bad custom chip "051962" with one from a dead Konami parts board.
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channelmaniac
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« Reply #2 on: September 15, 2008, 09:14:14 PM »

Fixed: Run and Gun
Symptom: Dead

A physical inspection turned up 2 gouged traces and bent pins / busted solder joints on 2 surface mount ICs. Fixed the traces, bent pins, and busted solder joints. Board would still not boot. Checked the ROMs on the board. Replaced one bad Mask ROM, one bad EPROM, and erased/reprogrammed a third EPROM to match the code used in replacing the bad program EPROM.
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channelmaniac
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« Reply #3 on: September 15, 2008, 09:14:33 PM »

Fixed: Lethal Enforcers II
Symtom: No video

Replaced a broken 056820 hybrid IC with one from a parts board. Board works but the connectors between the top and bottom board are finicky. You have to push them together firmly to keep from getting graphic corruption on the foreground characters. Cannot fully test it since I don't have any guns to connect to it.
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channelmaniac
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« Reply #4 on: September 15, 2008, 09:15:03 PM »

Fixed: Run and Gun
Symptom: Ressurect parts board

A physical inspection turned up patched JAMMA connections, 5 missing ROMs and a missing sound CPU. Fixed the JAMMA connector, burned new EPROMs, and replaced the missing sound CPU. Board would boot but give RAM errors for 27H and 29H and a bad EEPROM error.

RAMs had no address line activity. Noticed one desoldered hole next to the RAMs. Checked the MAME board pics and the board was missing a chip - 74LS244. Replaced the missing chip and the board would boot and pass the RAM diagnostics but still gave an EEPROM error.

Found the reset instructions for Konami boards: power it up with the test switch pressed. This caused the game to reset the EEPROM data which finished the game repair.
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channelmaniac
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« Reply #5 on: September 15, 2008, 09:18:08 PM »

Model: Various Konami games
Tip: Resetting EEPROM data

When repairing Konami boards it is important to remember that the NVRAM data saved on the EEPROM chips is directly related to the versions of the code in ROMs/EPROMs on the game.

If you are replacing code with a different version, wheter to upgrade it or simply because that was what was available in MAME to use for repairs, you will most likely need to reset the EEPROM data. To do this hold down the test button located on the game board itself and turn power on. Release the switch when it tells you on the screen. You have just reset the EEPROM data.
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channelmaniac
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« Reply #6 on: February 07, 2009, 07:54:28 PM »

Model: Monster Maulers
Symptom: Corrupt graphics colors. Tapping board made problems come & go

Resoldered surface mount IC 25V and tested board.
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channelmaniac
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« Reply #7 on: February 19, 2009, 10:19:08 PM »

Model: Contra
Symptom: Horizontal white lines on the screen

The board had horizontal white lines through all background images. Player and power ups looked normal. Checked the ROMs on the board and found the video ROM at location 7F had all outputs stuck high.

The ROM was a 2Mb mask ROM with an odd pinout. Used a 27C400 EPROM to replace it. Tied pin 1 (A17) to ground. The pin was left floating on the board since it was unused on the 2Mb ROM.

Played a game to test the board.
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channelmaniac
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« Reply #8 on: March 07, 2009, 09:07:19 PM »

Model: Gokukyo Parodius (Fantastic Journey)
Symptom: Dead

Board would boot with out the ROM board attached. ROM board would boot when put on a different main board.

Swapped out connector CN106 and CN107 on the ROM board and CN106 on the main board. Tested game.

Connectors were spread out and very loose. The boards worked when swapped with different ones due to differences in tolerances.
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channelmaniac
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« Reply #9 on: March 16, 2009, 11:14:35 PM »

Model: Tokomeki Taisen Puzzle Dama
Symptom: Corrupt Graphics

Board had problems with the main board. Removing the ROM board and tapping on the main board would result in green flashes on the screen.

Resoldered 31S, 25S, and 16G. 14P had been replaced before and had bent pins. Straightened one pin and resoldered the chip.

Tested board.
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channelmaniac
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« Reply #10 on: May 05, 2009, 09:47:42 PM »

Model: Hyper Sports
Symptom: Dead

Board would display garbage upon power up. Checked and cleaned the program ROM legs. Repaired a corroded leg on the C06 EPROM then replaced corroded socketson the C05 and C06 EPROMs. The board would then power up and play but had graphics corruption on text elements.

Cleaned the EPROM and custom chip legs on the video board to finish the repair.
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channelmaniac
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« Reply #11 on: May 25, 2009, 01:35:55 PM »

Model: Martial Champion
Symptom: Corrupt Graphics.

Character graphics and some scaling background graphics corrupt. Some graphics partially off screen.

Board passes initial self tests. Pushing down on the surface mount ICs had no effect.

Pushed the test button and ran the Mask ROM test. ROM 22K, 20K, 19K, 17K, 12K, and 10K were showing to be bad. These ROMs were connected to the surface mount custom IC 055673 at location 14K. Resoldered the chip to fix the corrupt graphics.
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channelmaniac
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« Reply #12 on: June 05, 2009, 07:50:37 PM »

Model: Time Pilot
Symptom: Dead

Replaced 1 bad socket and cleaned the corrosion off and repaired a broken pin on a custom Konami IC. Replaced 1 corroded capacitor and resoldered one that had come loose from its solder. Tested board.
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channelmaniac
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« Reply #13 on: June 26, 2009, 08:59:31 PM »

Model: Time Pilot '84
Symptom: Burnt edge connector

Board had burnt edge connector contacts for the +5v and ground connections. Removed the bad traces and laid down new ones with copper tape. Tested.
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channelmaniac
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« Reply #14 on: August 17, 2009, 07:46:00 PM »

Model: The Simpsons
Symptom: Will not boot. Bad ROM error

Board had attempted upgrade and repair damage. Many plated through holes and traces were damaged on the sound ROM and around the sound ROM.

Replaced 2 bad sockets and patched 10 traces. Board would then boot but was stuck in a reboot cycle when trying to test the ROM in location 15C on startup. Reset only happened when the board was first powered on after sitting. Custom IC 051550 was resetting the system. Soldered JP1 to disable the watchdog to finish the repair.
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channelmaniac
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« Reply #15 on: August 17, 2009, 07:46:40 PM »

Model: Mystic Warriors
Symptom: EEPROM Error

EEPROM IC tested good. A check of pin 3 showed it was shorted to ground through approx 26 ohms. Replaced the shorted 74LS273 at location 15G, reset the EEPROM data, and tested the game. The game worked but was missing text and motion graphics. Resoldered the surface mount chip at 14K to finish the repair.
« Last Edit: October 21, 2009, 08:53:01 PM by channelmaniac » Logged

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channelmaniac
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« Reply #16 on: August 30, 2009, 01:00:40 AM »

Model: Metamorphic Force
Symptom: Left input for player one not working

Patched bad trace and tested board.
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channelmaniac
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« Reply #17 on: September 07, 2009, 12:44:07 AM »

Model: Mystic Warriors
Symptom: Board would start self test and stick at "RAM ROM CHECK"

Board would boot into an EEPROM test/initialization if the test button was held down when powered on but would lock up when trying to normally start. The hybrid sound module, part # 054986A was cracked into 2 pieces. Replaced the hybrid module with one from a donor board and tested the game.
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channelmaniac
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« Reply #18 on: October 21, 2009, 08:52:36 PM »

Model: Mystic Warriors
Symptom: Input problems

Checked the JAMMA edge connector with a logic probe and found correct logic levels: high when button is open and ground when closed.

Checked the traces through the resistor networks and back to the 74LS257 at 19B. Logic levels were good going to the chip. Replaced the bad chip and tested the game. Found some corrupt graphics. Resoldered the surface mount chip at 14K, 14J, and one side of 8J to fix.
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channelmaniac
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« Reply #19 on: January 01, 2010, 01:19:43 AM »

Model: The Simpsons
Symptom: Stuck in reset (Watchdog)

The data bus lines were stuck high. Checked the 74LS245 at 12D. It was good. Pin 22 at 13C and 15C should've mirrored pin 22 at 16C/17C but was stuck high. Repaired broken trace between 3F pin 8 and pin 22 of 13C/15C. Tested game.
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channelmaniac
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« Reply #20 on: January 01, 2010, 08:57:00 PM »

Model: Mikie
Symptoms: No audio

Board had physical damage. Replaced 3 broken capacitors, 1 LM324 Op-Amp, and the LA4460 audio output IC. Tested game and found corrupt graphics. Reprogrammed the EPROM at H1 with the code for the USA version. It had the Japanese version of code on it.
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channelmaniac
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« Reply #21 on: January 01, 2010, 09:00:13 PM »

Model: Mikie
Symptoms: Corrupt graphics

This board was in strange shape with extra chips on it. Removed 3 EPROMs with incorrect code from the board. The board had the 27128 version chips and some of the 2764 version of chips on it. The 2764 chips were not necessary for the game to operate. Verified the remaining EPROMs were correct and in the proper position on the board. Address lines A0 and A10 on the graphics EPROMs were stuck high. Replaced a bad 74LS373 IC at C6 to fix the graphics problems and tested the board.
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channelmaniac
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« Reply #22 on: March 20, 2010, 09:32:06 PM »

Model: TMNT
Symptom: Graphic Corruption

Model would play but had lines in the graphics. Replaced bad ROM and tested.
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channelmaniac
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« Reply #23 on: April 03, 2010, 10:30:10 PM »

Model: Metamorphic Force
Symptom: Graphic issues

Background and foreground graphics would disappear when board is flexed and/or tapped. Reflowed custom surface mount ICs at 7K, 12K, and 15K and tested.
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channelmaniac
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« Reply #24 on: April 03, 2010, 10:31:55 PM »

Model: Bucky O'Hare
Symptom: Missing color

The blue output was missing. The custom hybrid, number 054573 at location U73 had inputs but no outputs. Replaced the hybrid and tested.
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