Some cleaning and this will look nice
Backglass is OK26.11.2005:
Plastics and rubbers are taken out. See how the mylar has shrinked and left a dirt trace.
Rubbers were somewhat past their best before day.
These flippers have hit the ball quite many times.27.11.2005:
Battery leak is not acid but highly corrosive base, potassium hydroxide. It eats away circuit board foils, soldering and component legs. Usually a couple of IC's near the battery go too, when the corrosive substance slowly creeps into their casings.
Board in vinegar bath.First the corrosive stuff is neutralized with vinegar, use a toothbrush dipped in vinegar. There might be lots of bubbling in the board, that shows the vinegar is doing its job. After a few minutes the board must be thoroughly rinsed with warm water and dried. Two lowes IC sockets must usually be replaced, and many times also some resistors and transistors near the battery.
Playfield cleaned and new rubbers.
Close up shot reveals some wear.The CPU board was OK, but there are still problems with the connectors. I will try cleaning, and if that doesn't help then I must replace the CPU board connectors.
Sorry, no test games yet...10.6.2006:
Old and new connectors, and a tool to insert wires into connectors.The wires are not soldered into connectors, but instead, inserted into connectors with a special tool. A sharp edge inside connector penetrates through the wire insulation, making the electric contact. Very handy!
New connectors attached to boards.And finally, the game is working just fine! Many light bulb sockets were bad, but good cleaning and soldering the socket tube to the base part helped.