Just Scored a Bally 6803 MotorDome from a pinsider. Game is in OK shape but was VERY dirty. Cleaned it up and have played a couple games, its pretty fun but the music is trash.
Issues that need fixin'
CRAZY UPPER FLIPPER (FIXED!!!): the left upper flipper goes into machine gun mode when the button is held...haven't researched yet.
Attempt 1 - can see that the thinner wire coming from one of the pins going into the coil wrapping is damaged, tried soldering it back together, worked for like 2 flips then broke again, going to replace the solenoid ( AQ-25-500 34-5050 )
Attempt 2: Replaced coil with new one, WORKS!!!!
DISPLAY VOLTAGE LOW (FIXED!!!) : Sitting around 135 VDC, adjusted the POT up, checked the supply 230VDC and its also around 140-150....
Attempt 1 - going to replace the filter Cap ( 160uf / 350V )
Attempt 2 - replaced filter cap, voltage very high, adjusted down with POT to 170, flicker fixed!
MISSING FLASHERS (FIXED!!): The Flashers behind the "turbo booster" sign work, but the flashers behind the goggles/and lightning bolts do not work
Attempt 1 : replaced all flash bulbs with known working flashers - the left lightning bolt and the "Turbo Booster" flashers work but the goggles and right Lightning bolt still don't work will try replacing the transistors next (need part #)
Attempt 2 - unlit GI light was actually a flasher socket with wrong bulb installed, replaced with flash bulb, now left AND right flashers working, only remaining failing flasher is Visor. The flashers are all wired up in 3 bulb series, if one bulb goes out the entire flasher will not work!!
Attempt 3 : Pulled Main board, Q20 Transistor was burnt up and physically damaged, removed, replaced with TIP 122 transistor, installed backwards
blew 8A fuse
Attempt 4: replaced tip122 transistor and diode, now flasher is stuck ON...not sure how to proceed.
Attempt 5: replaced IC @ U20, flasher still stuck on, unsure how to proceed.
Attempt 5: checking diode @ Q20 - In attempt 4 I mistakenly used a 1n4001 diode, needs to be 1N4004 or higher value. replaced, WORKS!!
BAD PLAYFIELD LIGHTS(FIXED!!#): One set of lights off, one set stuck on - these games use a multiplexed light driver, the lights that match (lightning bolt 1, spinner 1) are stuck ON, and OFF (Lightning bolt 4 and spinner 4). I am planning on replacing the transistors that drive these two sets of lights. Weird issue though, when I remove the bulb from spinner 1, the lightning bolt 1 light operates normally, but when the bulb is inserted it and its partner become stuck on. Thinking i'm gonna change the resistor (diode?) on the socket as well just in case.
Attempt 1 - replaced SCRs at Q51 and Q27, lit/spin 5 is working 100%, light 5 is aame, will replace diode on socket next
Attempt 2 - replaced diodes on light sockets, works!
ONE GI IS OUT (FIXED!!!): not sure why just one, socket looks OK,
Attempt 1: tried a couple different bulbs but none of them work in that spot (bulbs are tested good, and other GI's are on).
Attempt 2 - this is actaully a FLASHER socket, replaced with flasher bulb, tested, works!!!
those are the fixes, once i get them down I'm going to change the music to mode 2 (sounds but no BGM) and use a WAV trigger to inject some 8 bit metal. This game gets a bad rap but so far Im digging it. Too bad there's no multiball.
Issues that need fixin'
CRAZY UPPER FLIPPER (FIXED!!!): the left upper flipper goes into machine gun mode when the button is held...haven't researched yet.
Attempt 1 - can see that the thinner wire coming from one of the pins going into the coil wrapping is damaged, tried soldering it back together, worked for like 2 flips then broke again, going to replace the solenoid ( AQ-25-500 34-5050 )
Attempt 2: Replaced coil with new one, WORKS!!!!
DISPLAY VOLTAGE LOW (FIXED!!!) : Sitting around 135 VDC, adjusted the POT up, checked the supply 230VDC and its also around 140-150....
Attempt 1 - going to replace the filter Cap ( 160uf / 350V )
Attempt 2 - replaced filter cap, voltage very high, adjusted down with POT to 170, flicker fixed!
MISSING FLASHERS (FIXED!!): The Flashers behind the "turbo booster" sign work, but the flashers behind the goggles/and lightning bolts do not work
Attempt 1 : replaced all flash bulbs with known working flashers - the left lightning bolt and the "Turbo Booster" flashers work but the goggles and right Lightning bolt still don't work will try replacing the transistors next (need part #)
Attempt 2 - unlit GI light was actually a flasher socket with wrong bulb installed, replaced with flash bulb, now left AND right flashers working, only remaining failing flasher is Visor. The flashers are all wired up in 3 bulb series, if one bulb goes out the entire flasher will not work!!
Attempt 3 : Pulled Main board, Q20 Transistor was burnt up and physically damaged, removed, replaced with TIP 122 transistor, installed backwards
Attempt 4: replaced tip122 transistor and diode, now flasher is stuck ON...not sure how to proceed.
Attempt 5: replaced IC @ U20, flasher still stuck on, unsure how to proceed.
Attempt 5: checking diode @ Q20 - In attempt 4 I mistakenly used a 1n4001 diode, needs to be 1N4004 or higher value. replaced, WORKS!!
BAD PLAYFIELD LIGHTS(FIXED!!#): One set of lights off, one set stuck on - these games use a multiplexed light driver, the lights that match (lightning bolt 1, spinner 1) are stuck ON, and OFF (Lightning bolt 4 and spinner 4). I am planning on replacing the transistors that drive these two sets of lights. Weird issue though, when I remove the bulb from spinner 1, the lightning bolt 1 light operates normally, but when the bulb is inserted it and its partner become stuck on. Thinking i'm gonna change the resistor (diode?) on the socket as well just in case.
Attempt 1 - replaced SCRs at Q51 and Q27, lit/spin 5 is working 100%, light 5 is aame, will replace diode on socket next
Attempt 2 - replaced diodes on light sockets, works!
ONE GI IS OUT (FIXED!!!): not sure why just one, socket looks OK,
Attempt 1: tried a couple different bulbs but none of them work in that spot (bulbs are tested good, and other GI's are on).
Attempt 2 - this is actaully a FLASHER socket, replaced with flasher bulb, tested, works!!!
those are the fixes, once i get them down I'm going to change the music to mode 2 (sounds but no BGM) and use a WAV trigger to inject some 8 bit metal. This game gets a bad rap but so far Im digging it. Too bad there's no multiball.
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