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Archived from groups: rec.games.pinball (More info?)
I am testing a non-working STERN Solenoid Driver board out of the
machine. It is nearly identical to a Bally AS 2518-18, as is found on
early 80's games. At Q1 to Q 19 there are a series of SE 9302
transistors (to be replaced with TIP 102). I put the BLACK lead of my
DMM on the tab and the RED lead to each of the outer legs in turn.
Except for 2 of them, I get a NULL reading on the right leg and .5 to
..7 on the left leg. On two of them I get .6 or so on the right leg
also. Can ALL 17 of these transistors be BAD ? Or have I done something
wrong?
On the Lamp driver board, I get diode readings of .700 to .720 or so
on the MCR-106-1 transistors. Is this acceptable ?
Oh BTW, thanks LTG, I'll bet you answer this one first. )
I am testing a non-working STERN Solenoid Driver board out of the
machine. It is nearly identical to a Bally AS 2518-18, as is found on
early 80's games. At Q1 to Q 19 there are a series of SE 9302
transistors (to be replaced with TIP 102). I put the BLACK lead of my
DMM on the tab and the RED lead to each of the outer legs in turn.
Except for 2 of them, I get a NULL reading on the right leg and .5 to
..7 on the left leg. On two of them I get .6 or so on the right leg
also. Can ALL 17 of these transistors be BAD ? Or have I done something
wrong?
On the Lamp driver board, I get diode readings of .700 to .720 or so
on the MCR-106-1 transistors. Is this acceptable ?
Oh BTW, thanks LTG, I'll bet you answer this one first. )