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. 🙂
Cleaning of the popularity counter that keeps track of which songs is the most popular are now finished. 🙂
There were pins to be cleaned and reinserted… 🙂
The mechanism for showing which song is playing was disassembled and cleaned.
Unfortunately there should be two small cogs on one of the wheels that were broken..
To make things worse one of the cogs were missing, so it is not possible to just glue them back.
Luckily the Jukebox will work whithout it until a replacement part is found.
This 55″ TV just went completely dead.
No power led, nothing…
Searching for shorts on the power driver board revealed a shorted Schottky rectifier that needed replacement.
(SK510C)
Fortunately it seems to be working after the change of that rectifier.
A little bit of cleaning later… 🙂
Now it is time for the “wheel” that keeps track of the selections.
There are a lot of pins and springs to be cleaned and then reinserted… 🙂
All the push-buttons (30 buttons) in the selector unit needed to be cleaned.
Most of them did not work… 🙂
Next up for cleaning is the credit unit.
Rather filthy… 🙂
Got the mechanism out on the workbench for a first look.
Some obvious problems, and needs a good clean and lubrication.
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. 🙂
