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Gottlieb, 1978You're currently viewing posts by Pinsider cro_pinman.
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You can not do "anything" to change situation - L17 ( unfortunately) MUST go on in lamp test .
Only "solution" is to remove fuse during lamp test, if you want check lamps.
....comes to mind.... did you check coil (A-18318) some (aftermarket) coils are "stronger" then
originals, and (of course ) on coils you have 24V or (elco boosted) 32V ?
Greetings from Croatia 
Similar "problems" on SYS1 are with any "extended" solenoid drive ( with "lamp" transistors)
e.g.- Count Down two banks
On Buck Rogers (only) vari-target is on "extended mode" (lamp transistor) and it is.... "inconspicuous"
Quoted from barakandl:On a side note, sys 1 lamp test is about useless as it happens so quick. I have better results in game play mode.
+1
Quoted from snyper2099:I tested the A-18318 coil and got 4 ohms resistance
Looks OK....did you measure voltage on solenoids ? (24 or 32V )
Quoted from snyper2099:test is designed to operate that way.
+1
Heh ) ...I assumed something like that, that's a reason to repeat the question about voltage on solenoids.
Solutions....
1. remove ADDED elco to get "normal" voltage ( 24 V )
("bad" side is weaker coils "strenght" - especially on flipers )
2. just ignore everything and do not activate the lamp test )
3. make (maybe) risky "move" and put "stronger" fuse (empirically adequate...like 4A SB)
( check the value of added elco on "24V" bridge rectifier....another option is lower value)
Quoted from snyper2099:There is currently no capacitor in that circuit that I can see.
Take look near 24V bridge rectifier ("output" wire is red) at bottom of the cabinet.
WITHOUT elco on this rectifier (and ALL coils ) voltage is 24 V, because you measured 32 V, you "have"
elco connected !! (somewhere )
Higher voltage (WITH elco) means higher current...and 2,5A fuse blows in lamp test ( because activation
pulse is longer vs. "normal" play )
Quoted from snyper2099:and here is where I stand with this wacky system1 crap...
Haha...I can NOT agree with you ) For sure...SYS1 have "some" weak points - BUT, it is very reliable pinball.
(of course, with few modifications, and quality maintenance )
I worked over 20 years with SYS1,(from 1980 to 2000) and some of my pins made over 100k games...I can't "imagine" other can endure "torture" as SYS1 )
Back to topic...
Ok, you had unreliable measure (at this point my limited knowledge of the language comes more "prominent" 
anyway... check proper trafo input wiring, because 28V seems to be little "high".
Quoted from snyper2099:I put a 3AMP time delay fuse on the bank in question and the fuse no longer trips. No idea if going with a 3AMP is less safe or not but I know that the fuse will blow if the coil or transistor ever becomes shorted for much longer than the 5 second lamp test...
From my "point of view" it's OK
cheers
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