Working on a Demo Man and need some help!
At this point I have no display so keep that in mind. Also no batteries installed on the cpu.
Main Problem: Having a boot issue: When powered on I get a loud pop sound in the speakers, the start button flashes on then goes off and then the coin door inserts light up followed by 1 "bong" sound from the sound board. All LED's on boards are doing what they should per manual. Now here's the funny part, at this point nothing else has happened, no lights, no movement, game will not start. (note: maybe 3 out of 10 or so power ons at this point the very far back left flasher under the PF where the car hits the target has either flashed onand off or actually stayed on for a number of seconds then eventually goes out after a bit, this is the ONLY light to show life at this point.)
Then CONSISTENTLY (happens every time) after sitting powered on for 4 to 5 minutes the playfield comes alive, lights on, claw moves back and forth and elevator up and down and again 1 sound board "bong." At this point the coin door switches will not coin up for a credit but you can press the service credit button to add some, start a game and basically plays as it should. What would cause this delay in booting up? Also note this is ONLY with the coin door closed. If door is open then PF never comes alive at all!
SIDE Note: When powered off there's a strange static noise that sounds like a wave at the ocean coming ashore, then a high pitch squeek followed by an abrupt "pop" / off sound. All taking maybe 5 seconds. Is this normal? Also to note, if I turn the game back on BEFORE this sequence completes (after game has come alive prior) then game will boot and PF comes alive straight away, if I turn the game back on 1 second after this sequence is complete then game will not come alive for the 4-5 min duration again.
Minor Problem: No display. (Note: I have confirmed the dmd itself to be good by testing in another game) Before powering on the game for the first time I went through and checked all the fuses to be correct. At first power on I immediately blew dot matrix board 3/8A fuses at F601 and F602. There is a definite hack on this board (see below) where someone has combined a resistor and diode at D3. Why would this be done and is it safe to replace with just the correct resistor? What else can I check to sort out why I have no display?
SIDE Question about WPC fuses: Concerning the 3/8A fuses at F601 and F602. My demo man and shadow manuals call for Fast Blow fuses although the pinwiki WPC fuse jpeg shows slow blow? After checking, my shadow has SB's installed and has run for years no issue. On this demo man I installed FB as per manual and they blew. Which is correct?
I've also seen conflicting info for fuse F115 on the Driver board concerning the 3/4 A fuse as to if its FB or SB???
Minor Concern: My CPU is an A-12742-20013 (think it had a '92 date on it) instead of the manual called for A-12742-50028. Although it seems to run ok once booted is this safe to use?
Minor Concern: Driver board has no #2 or #3 LED installed, is this common?
Minor Concern: Aux. Driver PCB board LED 1 + 2 stay on once powered on, is this correct? Couldn't find info in manual?
Minor Concern: No opto flippers? Just regular switches installed. Did they produce any of these without or did someone just not want to replace them when they broke or something?
Minor Concern: Speakers seem to have quite a bit of hum and is exaggerated/surges by things like when inserts all flash at once.
Other Concern: My transformer seems to be hacked, maybe the source of my speaker hum? See pics below. I have not removed any tape but seems 1 blk wire from trans. is just cut. The blk and white wires on far side of connector have been combined and go to the power interface. The blk wire coming from the power interface seems to be connected to a 2nd blk wire coming from the trans. and possibly attached to the white w/ blk strip wire? Whats going on here? Should I try and clean this up?
Any suggestions or people with similar issues before? All input is appreciated! thanks
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Toronto, ON
Chesterfield, MO
Gaborone
