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Williams Indiana Jones pinball machine 2nd repair part 1

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This machine i repaired for about 1.5 years ago came back with some new faults that had appeared.

This time the left jet bumper and the right slingshot had stopped working.

The left jet bumper coil had a wire that were no longer connected due to vibrations.
Soldering it back on solved that issue.

The right slingshot coil was fried and were replaced with a new one.
Further troubleshooting showed that the TIP102 transistor controlling this coil on the driver board had burned.

I have now started replacing all the components in that circuit. (Total of 7 components)

Williams Jungle Lord pinball machine part 7 – Finished

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Finished. 🙂

A broken diode on a roll over switch made it not responsive.
Replaced that with a 1N4004 and it is back in business.
(The remains of the old one seems to have been a 1N4148.)

Funny thing when i troubleshooted the right magnet that did not work, i discovered that it did not seem to ever have been working from factory.
The playfield had absolutely no wear over the magnet compared to the left one that had wear over it.
And one end of one wire from the magnet looked brand new, and could not ever have been soldered in, it just hung there. 🙂
Soldered it in, and now it works as it should.

All that remains now is a final wipe of the playfield and putting the glass back in, and polish it, then it is ready to be picked up.

Williams Jungle Lord pinball machine part 5

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Now the sound board is finally working including speech.

Replaced the capacitors and also had to socket and replace both the CPU and the PIA for it to work.
(And also IC5 4050 buffer were socketed and replaced.)

All the boards now seem to work.

It is now time for the playfield, drop targets, switches, lamps, rubbers.

Williams Jungle Lord pinball machine part 3

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The Power Supply Board is now ready to be reinstalled in the game and be tested.
All capacitors are changed and all connectors are resoldered.
All fuses are also replaced.
A new connector for the GI were installed because of the previous wires soldered directly to the board.
A new fuse holder were also soldered in on the original spot instead of the external fuse holder that they did previously.

Unfortunately i had to solder in new wires for the incoming power because the previously modder drilled the original holes bigger to fit the larger wire they soldered in…
(I did not want to solder in a new connector that had no support from the hole itself.)

Williams Jungle Lord pinball machine part 1

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I got this Williams Jungle Lord pinball machine in for repair.

It has not worked in many years and need a complete overhaul.
The batteries on the MPU had leaked and caused much corrosion on the driver board under it.

I have not tried to boot it up yet due to the leakage, and i also want to repair the rectifier board first to be sure that the voltages are correct.

The rectifier board also has some dubious repairs that i have to fix. 🙂

Williams Indiana Jones pinball machine part 2 – Finished

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This machine is now finished and returned to the owner.

A short summary of some of the repairs :

-CPU-board : Acid damages repaired, and damaged IC:s/resistors/capacitors were replaced.
-Driver board : Two new connectors for the G.I. is mounted, and some capacitors were replaced.
-Sound board : Re-seating of all connectors restored the sound.
-Opto board ball trough : Resoldering of all resistors fixed everything wrong with this board. 🙂
-Thermistor at the line filter was replaced because the old one gave up after about 20 power-ups. 🙂
-Linkage to right slingshot were broken off, so it were replaced.
-New bulbs, new rubber and a slight cleaning.

Game now works 100% for what i can tell. 🙂

Williams Indiana Jones pinball machine part 1

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I got this Williams Indiana Jones pinball machine in for repair.
This machine has multiple problems.

It starts up, and it is possible to start a game.

But it ejects two balls every time.
(Bad optos maybe?)

There are no music whatsoever, and no soundeffects, just a random “ding” now and then.

When i tried to get into the test menu, it did not respond to any of the buttons inside the coin door.
So i measured all the cables from the buttons up to the connector on the CPU-board, and they were all ok.
Tested the buttons again, but still no response.

I then removed the CPU-board and placed it on my workbench to give it a good visual inspection.
Acid-damage had taken 6 IC:s and some resistors/capacitors…

So i removed IC:s and the battery holder, and will clean the board up before putting in sockets and changing some resistors and capacitors.

The driver board also has some damage on some connectors due to heating, and some hacking has been done previously that i have to fix.