Author Topic: Atari Games (Arcade) (Read 32716 times)

channelmaniac · « **Reply #20 on:** May 04, 2014, 05:25:45 PM »

Model: Centipede:
Symptom: Screen full of lines

The game powered up and the screen looked like an Atari 2600 without a cartridge installed. Checked the clock circuit and replaced bad 74LS163 ICs at M2 and P3. Board powered up but the screen was partially garbled. Replaced bad RAMs at L7, M7, and N7. Tested.

channelmaniac · « **Reply #21 on:** May 04, 2014, 05:25:57 PM »

Model: Centipede
Symptom: Stuck in watchdog

Cleaned the pins on the CPU and ROMs... Replaced the sockets and cleaned the pins on the POKEY and NVRAM chips. Tested board.

channelmaniac · « **Reply #22 on:** May 04, 2014, 05:26:09 PM »

Model: Centipede
Symptom: Dead. Nothing on screen.

Board was stuck in watchdog and had no output to the screen. Cleaned the legs of the CPU, POKEY, and ER2055 EAROM. Board would give a single beep when put in test mode now. Replaced the 2114 RAMs at F2 and H2. Board would then play blind. Board was missing the /HBLANK signal. Replaced bad 74LS107 at L4. Board then had video output but it was slightly garbled. Replaced the RAM at M5 then tested.

channelmaniac · « **Reply #23 on:** May 04, 2014, 05:26:21 PM »

Model: Area 51/Max Force combo
Symptom: Player 1 gun not registering hits

Board had attempted repair damage.

Replaced bad surface mount 74LS14 on the gun inputs. Patched damaged traces, and tested.

channelmaniac · « **Reply #24 on:** May 04, 2014, 05:26:33 PM »

Model: Centipede
Symptom: Player 2 stuck to the right side of the screen

Very odd symptom. Player 1 and Player 2 use the same controls and input circuitry. Replaced bad 74LS257 at D9.

Unsure why it was working perfect for player 1 and not player two! The chip showed bad on all 4 outputs on a BK 560A IC tester, but still worked fine for player 1. Head scratcher for sure!

channelmaniac · « **Reply #25 on:** May 04, 2014, 05:26:57 PM »

Model: Centipede
Symptom: Dead. Solid white screen.

Board was dead. Data bus line D1 was stuck low on the far side of the 74LS245 latch from the CPU. Replaced 74LS373 at J5 and would play blind but the sounds were off. Replaced bad POKEY to fix audio issues. Replaced bad 74LS289 Bipolar RAM at C8 to fix white screen issue. Board would play, but the archer would not move fully to the left and centipede would get stuck on the left 1/4 of the screen. The board would not pass self tests and would continuously beep. Used a Fluke 9010A to test the board and found RAM range 0500-05FF had a stuck bit. Replaced bad 2101 RAM at K5 and tested board.

channelmaniac · « **Reply #26 on:** May 04, 2014, 05:27:10 PM »

Model: Centipede
Symptom: Dead. Black Screen

Board would not read the RAM or ROMs with the Fluke 9010A. Found smeared solder short under ROM at J1. Fixed solder short and replaced ICs B1, C1, F2, H2, J2, J4, and P6 that were damaged by the solder short. Board was still dead, but the CPU was able to read and write to all of the RAMs and read the ROMs properly. Discovered board was missing VSYNC signal. Traced it back and discovered a 74LS163 at IC P4 instead of the proper 82S129 PROM. Programmed a replacement PROM and installed it. Tested board.

channelmaniac · « **Reply #27 on:** May 04, 2014, 05:27:26 PM »

Model: Centipede
Symptom: Would not coin up with the correct amount

Replaced bad DIP switch and tested.

channelmaniac · « **Reply #28 on:** May 04, 2014, 05:27:41 PM »

Model: Centipede
Symptom: Dead

Replaced bad ROM socket at J1. Reseated the other 3 ROMs. Tested.

channelmaniac · « **Reply #29 on:** May 04, 2014, 05:27:55 PM »

Model: Centipede
Symptom: Stuck in Reset

Board would boot to the game but constantly reset. Replaced bad RAM at H2 and tested.

channelmaniac · « **Reply #30 on:** May 04, 2014, 05:28:17 PM »

Model: Shuuz
Symptom: Excessive EEROM Retries error. Missing motion objects.

Replaced 28C16 chip. Replaced missing GAL chip at 97N with one programmed with code from the Atari GALery. Tested.

channelmaniac · « **Reply #31 on:** May 04, 2014, 05:28:30 PM »

Model: Area 51/Max Force Combo
Symptom: Will not boot.

Cleaned soda spill from board. Replaced IDE to Compact Flash Adapter. Tested.

channelmaniac · « **Reply #32 on:** May 04, 2014, 05:28:44 PM »

Model: Centipede
Symptom: Dead. No video.

Board had CPU and ROM activity but no horizontal or vertical sync or blanking signals. Replaced dead 74LS163 at N2 and tested.

channelmaniac · « **Reply #33 on:** June 03, 2014, 06:00:34 PM »

Model: Dig Dug
Symptom: No sound

Replaced the LM324 op amp as it was running hot. Replaced a dead 74LS174 at location 2M/N and tested.

channelmaniac · « **Reply #34 on:** September 20, 2014, 10:04:31 PM »

Model: Rolling Thunder
Symptom: No red or green on screen, only blue.

Replaced bad PROM at location 3R. Removed short on pin 4 of IC 3U to fix a blue shading issue. Tested.

channelmaniac · « **Reply #35 on:** January 20, 2016, 09:43:29 PM »

Model: Toobin'
Symptom: Missing colors on screen

Replaced a physically broken custom resistor pack in the video output section with one from a donor board and tested.

channelmaniac · « **Reply #36 on:** September 02, 2016, 07:16:31 PM »

Model: Dragon Spirit
Symptom: Garbage on screen

Board would play, but the screen was scrambled.

Replaced bad SRAM at L5 on the daughterboard and tested.

channelmaniac · « **Reply #37 on:** October 16, 2016, 09:01:41 PM »

Model: Tetris
Symptom: Dead. Garbage on screen

Replaced bad 6502A CPU and tested.

channelmaniac · « **Reply #38 on:** January 10, 2017, 06:53:05 PM »

Model: War: Final Assault
Symptom: Burning components

Replaced 2 shorted and burning 10uf @ 16v surface mount Tantalum capacitors and tested.

channelmaniac · « **Reply #39 on:** April 09, 2017, 07:05:16 PM »

Model: Centipede
Symptom: Dead

Replaced missing 12.096MHz crystal and straightened bent pins on 2 ICs. Board would boot to garbage. Replaced a bad 6502 CPU and tested game.

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Author Topic: Atari Games (Arcade) (Read 32716 times)