I've got one light out on the playfield. Its the 1000 pt bonus light. Can't seem to find any schematics for the lamp driver to figure out which component is bad. The bulb/socket test good. Which SCR? Also, no sound. The SB 100 it came with is tan and has a lot of labeled unused "holes". Appears factory. I've reflowed solder on all the header pins. Any help would be appreciated.
Nugent uses the same game ROMs as Lectronamo, so you can use the Lectronamo schematics found online as a guide. In this case, the 1,000 bonus light is activated by SCR Q14 on the lamp board.
Regarding the sound board, grab the Hot Hand schematics - it has the best quality scan of the SB-100 circuit diagram. Start by checking the voltages at the test points.
There's 4 pages of good info here:
http://www.techdose.com/projects/Stern-Pinball-SB100-Sound-Board/346/page1.html
Oh, one more thing.
Since someones replaced the sound board with the later rev C-1 board in your game, you must make sure that dip switch 23 on the MPU board is set to ON to select "Computer type sounds", otherwise you will get no sound. Setting this switch to OFF requires a SB100 with the chime simulation components fitted and the rev C-1 board doesn't have them.
Quoted from Quench:Nugent uses the same game ROMs as Lectronamo, so you can use the Lectronamo schematics found online as a guide. In this case, the 1,000 bonus light is activated by SCR Q14 on the lamp board.
Regarding the sound board, grab the Hot Hand schematics - it has the best quality scan of the SB-100 circuit diagram. Start by checking the voltages at the test points.
There's 4 pages of good info here:
http://www.techdose.com/projects/Stern-Pinball-SB100-Sound-Board/346/page1.html
Hey, thanks for the correction and saving kitty time and trouble with my mis-info...
Q14 was the SCR in question. Now all lights work. Been working on getting 5 displays going. I fiddled w/the pots on the soundboard and noticed a change in the speed and tone in the noise coming from the speaker, but still no game sounds. The saga continues....thanks for the help so far guys.
Quoted from cody_chunn:Hey, thanks for the correction...
You've been a little quiet around here lately, hope everything's ok 
Quoted from pinkid:I fiddled w/the pots on the soundboard and noticed a change in the speed and tone in the noise coming from the speaker, but still no game sounds.
Were these "noises" while the game was trying to play sounds or just some background noise?
Check the supply voltages at these test points on the sound board:
TP7 = 12VDC
TP9 = 10VDC
TP6 = 5VDC
TP4 = Ground reference
These sound board test points are the outputs of the tone generators. Since they're square waves with about 50% duty cycle, you should measure about 2.5V (half the 5V supply voltage) with your multi-meter.
TP2 = 2.5V
TP3 = 2.5V
TP5 = 2.5V
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