A personal repository of random information in compensation for a fatigued biological computer
Breaded After Hours » PinBall » Terminator 2
20131224 T2 purchased from Mike in Thorndon (Thanks Greg)
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Issues:
GI Issues:
Lots of trouble shooting information here:
http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#General_Illumination_Problems
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Fixed:
Set your DMM to AC Volts
Go to connector J120
Read the voltage across pins 1 and 7
Then, 2 and 8
3 and 9
5 and 10
6 and 11
All should be around 6.3
Then, repeat those tests on J121
Are any missing?
If so, pull the driver board, and put the meter on continuity test. This
is the one that beeps or buzzes to show 2 points are connected. Test the
following:
J115 pin 1 to ground. Note if this connection is broken, wacky GI
dimming can occur.
J115 pin 2 to fuse F106 (lower left) to J120/J121 pin 11, to J119
pin 1.
J115 pin 3 to fuse F110 (lower right) to J120/J121 pin 7.
J115 pin 4 to fuse F109 (upper right) to J120/J121 pin 8.
J115 pin 5 to fuse F107 (middle left) to J120/J121 pin 10.
J115 pin 6 to fuse F108 (upper left) to J120/J121 pin 9.
J115 pin 7 to Q10 top leg (triac lower rt). Q10 middle leg to
J120/J121 pin2.
J115 pin 8 to Q18 bottom leg (triac upper rt). Q18 middle leg to
J120/J121 pin1.
J115 pin 9 - key
J115 pin 10 to Q16 top leg (triac lower mid). Q16 middle leg to
J120/J121 pin5.
J115 pin 11 to Q14 top leg (triac upper mid). Q14 middle leg to
J120/J121 pin3.
J115 pin 12 to Q12 top leg (triac left). Q12 middle leg to
J120/J121 pin6, to J119 pin3.
Even if the traces *look* good, you should always check for continuity -
that's the #1 cause of GI problems after rebuilding.