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Author Topic: Sega Games (Other Arcade)  (Read 33712 times)

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Offline channelmaniac

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Re: Sega Games (Other Arcade)
« Reply #20 on: May 07, 2014, 07:10:12 PM »
Model: Naomi
Symptom: Will not communicate with JAMMA adapter

Replaced broken USB port on the Naomi's I/O board. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Sega Games (Other Arcade)
« Reply #21 on: May 07, 2014, 07:10:25 PM »
Model: Naomi
Symptom: RAM Error. Will not boot cartridges

Self test showed error on IC29, the 62256 SRAM used for backup. Pin 20 on the RAM was stuck high. Removed leaking backup memory capacitor and the 8 pin EEPROM next to it. Cleaned up the leakage, resoldered 3 pins on the surface mount 74157, installed a new .1F supercap, new 8 pin socket, reinstalled the EEPROM, and patched a damage trace on the EEPROM. Tested.

This EEPROM is used to load configuration data into the Altera FPGA chip. Without it working correctly the board will not operate properly.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Sega Games (Other Arcade)
« Reply #22 on: May 07, 2014, 07:10:45 PM »
Model: Naomi
Symptom: RAM Error. Will not boot cartridges

Self test showed error on IC29, the 62256 SRAM used for backup. Pin 21 on the RAM was missing its signals. Removed leaking backup memory capacitor and the 8 pin EEPROM next to it. Cleaned up the leakage, installed a new .1F supercap, new 8 pin socket, reinstalled the EEPROM, and patched a damage trace between the BIOS ROM and IC29. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Sega Games (Other Arcade)
« Reply #23 on: May 07, 2014, 07:11:01 PM »
Model: Naomi
Symptom: Dead

CPU fan was frozen. Replaced CPU fan and bad case fan. Replaced leaking supercap and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Sega Games (Other Arcade)
« Reply #24 on: May 07, 2014, 07:11:14 PM »
Model: Naomi GD-ROM, 610-0617
Symptom: Dead

JAMMA I/O power cable and GD-ROM power cable were mixed up and the GD-ROM was killed with +12v on the 5v line.

Replaced the control board with the control board from a Sega Dreamcast and tested.

This model of GD-ROM uses the same board and laser assembly as the Sega Dreamcast.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Sega Games (Other Arcade)
« Reply #25 on: May 07, 2014, 07:11:30 PM »
Model: Naomi
Symptom: Missing audio on right channel

Replaced burnt 510 ohm surface mount resistor at R333S and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Sega Games (Other Arcade)
« Reply #26 on: May 07, 2014, 07:11:54 PM »
Model: Pengo
Symptom: Dead

Board was in a bulk buy and had been scavenged for parts.

Replaced missing 74LS04 and 74LS138 ICs. Board had no clock. Replaced 74LS368 at IC6. No change. Examined clock circuitry closely and saw a hairline crack in R17. Replaced R17 and board tried to boot. Cleaned EPROM legs and board booted, but had graphics problems.

Moving graphics were jerky in nature and backgrounds and text were flipped from the direction the player sprites were playing, similar to a flipped screen in cocktail mode, until after the first round of attract mode finished then were correctly oriented. Repaired 2 gouged traces, one going to an input to a 7489 Bipolar RAM, to fix the jerking graphics. The FLIP signal coming from the 74LS259 at IC 27 was improper on power up and corrected after the first round of attract mode. Replaced the IC 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: Sega Games (Other Arcade)
« Reply #27 on: May 07, 2014, 07:12:07 PM »
Model: Chihiro (House of the Dead III)
Symptom: Error 2: Mainboard Error

This system is a Microsoft XBox system with a Sega adapter board attached and a standard Naomi Network DIMM board and GD-ROM plugged in. The Sega adapter board had the same type of leaking .1F supercap that the Naomi 1 systems have. (Unsure on Naomi 2 as I haven't had one on the bench yet.)

Also, the Xbox system it's based off of has a 2.5v 1F supercap over on the front edge of the board. It leaks too and will corrode traces.

You MUST remove the caps, clean up the electrolyte leakage, and replace the caps. Check ANY and ALL traces around the .1F cap on the Naomi adapter board. Patch any damaged traces. Be careful as there is one trace that goes under a tiny 8 pin chip to a pin on the opposite corner and not straight up the side of that chip like it looks.

Patched 1 trace, replaced the supercaps, 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: Sega Games (Other Arcade)
« Reply #28 on: May 07, 2014, 07:12:24 PM »
Model: Naomi GD-ROM
Symptom: Will not read discs

Controller board had a smoked IC chip. Replaced the Toshiba TC9450AF IC with one from a donor board. 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: Sega Games (Other Arcade)
« Reply #29 on: May 07, 2014, 07:12:44 PM »
Model: Naomi GD-ROM
Symptom: Very noisy when seeking

Replaced laser head motor/gear and tested. Gear had cracked and spread far enough apart that it was causing the gears to click.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Offline channelmaniac

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Re: Sega Games (Other Arcade)
« Reply #30 on: May 07, 2014, 07:13:00 PM »
Model: Naomi GD-ROM
Symptom: Will not read discs

Replaced laser assembly with one from a physically damaged donor drive. 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: Sega Games (Other Arcade)
« Reply #31 on: May 07, 2014, 07:13:14 PM »
Model: Sega Naomi
Symptom: RAM Error

RAM Error: U29 bad

Removed leaking supercap, the 8 pin EEPROM, and the 42 pin BIOS and socket. Cleaned electrolyte from the board and jumpered 2 traces damaged by the leaking supercap. Replaced the 8 pin socket for the EEPROM and reinstalled the IC. Reinstalled the 42 pin socket and the BIOS chip. Reset the Backup RAM 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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  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #32 on: May 07, 2014, 07:13:26 PM »
Model: NAOMI
Symptom: Dead

Both the GPU and case fan were seized. Replaced both fans and tested. Replaced leaking memory supercap and re-tested.

NOTE: The NAOMI will NOT boot if the GPU fan is turning slow or not at all.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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Re: Sega Games (Other Arcade)
« Reply #33 on: May 07, 2014, 07:13:40 PM »
Model: Laser Ghost (System 18)
Symptom: No sync, Crackled sound

Cleaned board, cleaned edge connector with a fiberglass pencil, and replaced 2 physically damaged caps. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #34 on: May 07, 2014, 07:13:54 PM »
Model: ST-V
Symptom: Dead

Built a replacement shorting plug to go into connector CN5. Game then booted with a cartridge error. Ran Factory Tests on Slave CPU and it passed. Disassembled the Die Hard cartridge, cleaned the edge connector, reassembled, 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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  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #35 on: May 07, 2014, 07:14:10 PM »
Model: ST-V
Symptom: Dead

Resoldered the 2 SH-2 CPUs. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #36 on: May 07, 2014, 07:14:38 PM »
Model: ST-V
Tip: Building a shorting connector for CN5

The board will not boot without this shorting connector or a daughterboard plugged into CN5. Take a female jack that fits the connector (Same kind as on a Playchoice-10 motherboard) and built is as follows:

Cut and remove all soldertail pins from row C
Cut and remove pins A1 through A5
Cut and remove pins B1 through B5
Cut and remove pins A27 and B27
Bend pin A6 to touch B6, A7 to touch B7, A8 to touch A8, and so on for all the remaining pins on rows A and B.
Solder pin A6 to B6, A7 to B7, A8 to B8, and so on for all the remaining pins on rows A and B.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #37 on: July 27, 2014, 09:42:13 PM »
Model: NAOMI 2
Symptom: Leaking supercap

Cleaned up leakage from the supercap and patched two damaged traces.

Note: Most of the large group of traces near the supercap go to a pair of SOIC chips, but the 5th one in the group goes under them and down to the right most of the set of 4 thru-holes on the far side of the coin cell battery holder. If the traces have dark spots on them the electrolyte from the supercap has damaged the traces. Check continuity on them and patch as needed with 30ga Kynar wire.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #38 on: November 25, 2014, 07:10:40 PM »
Model: Bloxeed
Symptom: No sound

Replaced blown audio amp chip and one capacitor in the sound section. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
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Re: Sega Games (Other Arcade)
« Reply #39 on: November 27, 2014, 12:31:20 AM »
Model: Pengo
Symptom: Crash/reboot. Character placements on screen are wrong

Pin 40 on the custom CPU was broken at the ceramic body of the IC and causing the crashing/rebooting. Replaced the custom CPU with a standard Z80A and erased/reprogrammed the 8 program EPROMs with unencrypted ROM code from the pengo3u ROM set. Replaced 74LS161 at IC90 to fix the character placement issue. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

 

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