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Author Topic: Midway Games  (Read 100788 times)

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Offline channelmaniac

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Re: Midway Games
« Reply #380 on: August 09, 2022, 11:56:25 PM »
Model: Space Invaders Deluxe
Symptom: Missing sounds. Problems with 2 player game

Daughter board had a note about loose edge connection contacts. Epoxied loose contacts back to the PCB. Replaced 5 LM3900 chips to fix sound issues. Unit would start a 2 player game but fire button would not work. Replaced bad DIP Switch bank. Switch 5 was open. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Re: Midway Games
« Reply #381 on: August 10, 2022, 09:53:33 PM »
Model: Space Invaders
Symptom: Dead

Cleaned pins on the daughter board. Replaced bad CPU and 4 mask ROMs that suffered from pin rot. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Midway Games
« Reply #382 on: August 11, 2022, 01:52:34 PM »
Model: Space Invaders
Symptom: Dead

Replaced bad CPU and tested. Replaced LM3900 at M5 to fix a missing Invader Hit sound effect. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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Re: Midway Games
« Reply #383 on: August 11, 2022, 10:58:26 PM »
Model: Space Invaders
Symptom: Dead

Replaced bad CPU. Replaced 4 resistors, 2 caps, and 1 SN76477 to return the mothership sound to working order. Replaced a physically broken cap to fix the missile fire sound. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

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Offline channelmaniac

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  • Few things are better than fixing an old game...
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Re: Midway Games
« Reply #384 on: August 15, 2022, 03:09:42 PM »
Model: Sea Wolf
Symptom: Dead

Replaced bad 74S04 to restore main clock. Replaced bad 9320 clock divider to restore the rest of the clocking signals. Replaced bad 7414 at D1 on the daughter board holding reset stuck. Replaced bad ROM socket causing graphic corruption. Replaced shorted 7414 at C1 on the turret input circuit. Replaced a bad 7417 IC and 4401 transistor on the daughterboard in the light control circuit. Replaced bad 7406 in the sound control circuit on the daughterboard.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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Re: Midway Games
« Reply #385 on: August 15, 2022, 03:12:56 PM »
Model: Ms Pac Man
Symptom: Dead. Garbage on screen.

Reset circuit was stuck low. Replaced shorted transistor at Q3, shorted diode at D2; bad 74LS161 with shorts on pins 7, 9, and 10 at 9C; and replaced a 74LS08 with a shorted input pin at 7H. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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  • Few things are better than fixing an old game...
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Re: Midway Games
« Reply #386 on: October 18, 2022, 06:03:14 PM »
Model: Ms Pac Man
Symptom: Dead. Nothing on screen

Replaced bad clock divider at 3S and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

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  • Few things are better than fixing an old game...
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Re: Midway Games
« Reply #387 on: October 18, 2022, 06:03:37 PM »
Model: Ms Pac Man
Symptom: Dead, garbage on screen

Replaced bad CPU socket 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: Midway Games
« Reply #388 on: October 26, 2022, 10:05:08 PM »
Model: Ms Pac Man
Symptom: Dead

Replaced the sockets for the Sync Bus Controller and VRAM Addresser. Cleaned the pins on the Sync Bus Controller module then installed both and the zip ties to hold them in place. 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: Midway Games
« Reply #389 on: November 20, 2022, 09:43:14 PM »
Model: Demolition Derby
Symptom: No audio

Tested main PCB and sound board OK. Had customer send in the amplifier PCB. Replaced 3 bad caps on the amplifier PCB and checked the solder joints on the connectors and audio amp ICs. 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: Midway Games
« Reply #390 on: November 23, 2022, 12:19:03 AM »
Model: The Grid
Symptom: Wave RAM errors

Reflowed Wave RAM and tested. Replaced 3 EPROMs giving errors on self test. Replaced corroded R322 and burned coil on pin 2 of the Player 3 Controls port. Installed three missing standoffs to help keep the board from flexing when it gets reinstalled.
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: Midway Games
« Reply #391 on: November 23, 2022, 12:20:53 AM »
Model: The Grid
Symptom: Dead. Missing parts.

Installed missing screw, nut, and insulator on the 3.3v regulator. Found the Security PIC was dead. Replaced with one from the other board the customer sent in and the board sprang to life. Replaced 3 EPROMs giving errors during self test. Reflowed one side of the ADSP-2104 and tested audio. Board now passed tests but had corrupt graphics. Reflowed the PFQP Wave RAM and tested. Installed 5 missing standoffs.
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: Midway Games
« Reply #392 on: December 01, 2022, 11:49:31 PM »
Model: Mortal Kombat 3
Symptom: Dead

Board wasn't dead... played blind.

Replaced shorted U91 and U75 and one 74ALS541 in the video output. This restored sync and a short burst of video during the Palette RAM test. Replaced U45 to get video to return. Replaced both Palette RAMs and the Orbit chip to fix Palette RAM errors. Replaced U33 to fix a U33 error after a reflow did not fix the issue. 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: Midway Games
« Reply #393 on: December 03, 2022, 01:46:51 PM »
Model: Ms Pac Man
Symptom: Dead. Flashing 0s on screen

Replaced all 6 2114 RAM chips and tested. One was bad, but the other five had disintegrating legs (rusted silver plated steel legs) so all were replaced to make the board more stable.
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: Midway Games
« Reply #394 on: December 13, 2022, 02:29:59 AM »
Model: Mortal Kombat 3
Symptom: Player 2 up and down not working

Replaced bad 74HCT541 chip 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: Midway Games
« Reply #395 on: December 13, 2022, 02:30:41 AM »
Model: Mortal Kombat II
Symptom: Graphics corruption and reboots during attract mode

Reflowed UE13 and replaced the 4 monolithic capacitors around it.
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: Midway Games
« Reply #396 on: January 06, 2023, 08:22:13 PM »
Model: WWF
Symptom: U33 error, garbage on screen

Board had a missing edge connector contact finger.

Reflowed U33 and patched a dead trace to fix the error. Cleaned up the battery socket and replaced the dead battery to fix a CMOS settings error. Used high-temp 2-part epoxy to affix a replacement edge connector finger contact and soldered it into the circuit. 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...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Midway Games
« Reply #397 on: January 30, 2023, 01:15:40 AM »
Model: Bosconian
Symptom: Sprite issues then many chips with broken legs after owner reseated chips.

Replaced all the 24/28/40/42 pin sockets and the unencapsulated resistor packs. Replaced ROMs with multiple broken legs at 3J on CPU board and 4D, 5L, 5M, and 5N on video board. Repaired broken leg on the 05xx and 50xx chips on the video PCB. Replaced 08xx chips at 2E and 2H as they had too many broken legs to repair. Repaired broken pins on chips at 3L, 3K, and 4H (51xx custom) on the CPU 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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  • 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: Midway Games
« Reply #398 on: February 16, 2023, 07:45:31 PM »
Model: WWF Wrestlemania
Symptom: Sound subsystem failure

A RAM was badly replaced as an attempted repair.

Replaced 2 open SMT coils on the sound RAMs. Removed the RAM and found Pin 6, Pin 11, and Pin 21 had broken connections. Installed a socket and patched the three traces. 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: Midway Games
« Reply #399 on: February 16, 2023, 09:48:37 PM »
Model: Mortal Kombat II
Symptom: Dead

Corroded pins on 2 ROMs

Replaced UJ22 and UJ23 ROMs and their sockets. Replaced corroded DSP CPU's PLCC socket and cleaned the chip's legs. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

 

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