Added 8A SB fuses for the two bridge rectifiers.
Due to a Williams design flaw these were not fused from factory, so if one of them shorted the game could catch fire and burn down your house. 🙂
I also changed the rectifiers for new ones.
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.)
I just changed the capacitors on the power supply board.
The big one is the last one to replace.
I have ordered it, and when it arrives i will change it.
Next is resoldering the pins. (Connectors)
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. 🙂
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. 🙂
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.
It is now up and running, but with one of my other working MPU boards that were on stock.
I have started to work with the MPU board that was in this game.
(Acid and component removal.)
The solenoid board was repaired, the only damage was the high voltage section.
All transistors were bad and the resistor at R51 was torched, so all components in the high voltage section were replaced.
I only kept some of the resistors that were still ok.
The capacitor for the high voltage are still the same because i don´t have a new one on stock, but will get it asap.
The capacitor for the 5v were replaced, and i also did the “future proofing”.
(Adding ground jumpers for the capacitors.)
All the #44 bulbs were replaced with new ones, and all the rubbers are new.
All the plastics were cleaned and polished.
(The playfield also got a light cleaning.)
The rectifier board needed a new fuse holder for the GI.
I also cleaned the header pins, and replaced the plastic connectors terminal pins.
(The cleaning of the header pins is a temporary fix, i still need to replace all three of them when i receive the new ones that i ordered.)
Two displays were replaced with working used ones.
(One of the two bad displays blew the fuse in the high voltage section, and the other one was simply not working.)
Things that still need some attention :
The lamp socket at the left pop bumper needs to be replaced.
It has a voltage drop between the underside and the socket on the top side, so the bulb will not come on.
The lamp socket at the last letter A in “MANIA” have a bad connection.
Needs to be cleaned or replaced.
MPU board needs some components and traces replaced due to corrosion from the battery acid.
The three .156″ headers on the rectifier board needs to be replaced with new ones.
I bought this Bally Silverball Mania pinball machine (Made 1980) two days ago.
It was listed as non working.
It stood in a corner of a garage and has probably not been working for several years.
All the rubber bands has dried out with cracks in them, and one flipper rubber had snapped off and was just laying there semi-attached.
When i prepared it for transport and was to take out the ball, it was missing. 🙂
The MPU-board seem to still have it´s original battery.
(Yes, it has leaked.. 🙂 )
I will not even try to power it up in this state.
Firstly i will have to check all the boards, and replace burnt connectors etc.
(Voltages, capacitor changes, solenoid board upgrading and so forth.)
All this is coming, so just wait for it. 🙂
The playfield doesn´t seem to be badly worn, with just a few small areas where the wood is visible.
The top glass seems to be in good shape.
I have a 122-125 transformer with a rectifier board from a Bell Games pinball machine.
I am now replacing the Bell Games rectifier board with a PindoraBox AS-2518-18 rectifier board.
One 40-pin socket are now replaced.
Also added the missing green LED.
