I have a GamePlan Sharpshooter that I almost have finished. There are two 500 point red standup targets in the upper left hand corner of the playfield that score when hit but do not play a sound effect. The drop targets also score, light their letter light, but do not make a sound. Is this correct? Did GPN run out of space on the sound board?

I've also noticed that there are some other abnormal features on this game: two of the four pop bumpers lights' are in the GI circuit, and two are feature lights that go off and on. The 2X, 4X, etc. Bonus lights between the flippers are not part of the Attract Mode sequence, when they would be in a BLY, WMS or GTB game.

Gentlemen,

Thanks for this info. I will do some digging a post the results.

Update: I thought that the lower/lower and upper/right pop bumper lights were in the GI circuit because they were wired into GI lamps. That violated a basic rule of pinball diagnosis: "Just because it was wired that way when you GOT it, does not mean that it is SUPPOSED to be wired that way."

Some previous owner had removed the blue/white wires that go from the pop bumper lamp socket to the 5 watt resistor, and wired them to a GI bulb socket. Switched the wires back their resistors: the lamps do not light when the lower 500 point target is hit. That's why the guy switched them.

The four 5-watt resistors appear to be 8.2 ohm (gray/red/gold), but they all test at between 5.9 and 6.1 ohms, with a cheap meter.

Bad transistor in the Lamp Driver board?

The Q47 tests bad. The one in there now is a Motorola 7852 and the schematics call for a MCR 106-7.
Can I replace it with a TIP-102?

I found an old sound board from another Sharpshooter that I had before, I installed it and the two missing sounds appeared! I would like to be able to fix the missing sounds and sell it as a working board. I will reflow the connectors, but is this most likely a transistor or chip issue?

Thanks,

Alan

Not quite sure what the names of the missing sounds are.

According to one schematic the sounds are: gunshot, ricochet, horse (pony), rattlesnake, howl (whoop), 6 chimes and explosion. Also, on the "B" 76477 which has the multiple sounds, the schems list: decay, SLF, trigger and one shot.

With what appears to be the 100% working board, all switches (except outhole and flippers) emit a sound:
slingshot & 10-point switches - hi-toned beep (chime?)
500-point targets - medium-toned beep (chime?) *missing on other board
all rollovers and kicker - low-toned boop (chime?)
drop targets - one gunshot * missing on other board
spinner - horse (pony)
pop bumpers - ricochet
50,000 point rollover - 7 second long decending tone
game over - machine gun(?) plus one gunshot at the end, different from machine gun

I haven't heard the explosion which is on chip "A" 76477, the rattlesnake or howl (warble). Perhaps the board is not 100% after all.

Does this narrow down the areas where I should check on various transistors and chips? Isn't there a way to ground a leg on a chip or trans in order to play the sound? And how do I do that without blowing up the whole game?

Thanks for you help,

Alan