(Topic ID: 285582)

Congo - no power on AV board - J605 issues

By Redback37

3 years ago


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  • 20 posts
  • 8 Pinsiders participating
  • Latest reply 3 years ago by Redback37
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Molex pinout for US 120V (resized).jpg
voltage jumper (resized).JPG
AV board.pdf (PDF preview)

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#5 3 years ago
Quoted from Redback37:

Update:
Checked J604 pins output on AV board and at end of cable just before it plugs into the DMD board (both the same so not a wire in here): 
Pin 1 - -114.6 (LOW)
Pin 2 -88.9V (LOW)
Pin 3 - key
Pins 4 and 5 - 0V (ground)
Pin 6 - +5.1V (OK)
Pin 7 -  +11.7V (OK)
Pin 8 -  +62.5V (OK)
Rechecked all connections to transformer.
Rang out wires between J605 and Tx - good continuity.

The high voltage section of the WPC95 A/V board has 2 circuits the 62v and the -113v/-125v.

J605-1/2 (80v AC) input is correctly producing 62v DC (J604-8 62.5v) - not sure why/how you get a different input voltage at F601 (51.5v) and possibly your measurement of J605-3/4 (100v AC) at F602 (-63.6v) is not right either??

The HV power circuits do fail and best to simply replace the entire HV section on the board. Here is the HV repair kit that Marco sells https://www.marcospecialties.com/pinball-parts/WPC-SEMIHV20516

ChrisHibler might be able to add some further insight or advise how to best measure the input voltage from the transformer

#10 3 years ago
Quoted from Berserk:

yes this is a re-import, we were troubleshooting the transformer voltages last night.

The 12 pin plug in the power box is used to set the input voltage. The first pic shows the pin connections for 120V USA. You may have a DBV (Dollar Bill Validator) connection, the red circle in the 2nd pic shows how the plug should be wired which is the same voltage settings as the first pic but has the extra wires going the DBV connectors. If you have low line voltage at your place use the pinouts in the left diagram.

The other thing to potentially change is the fuse in the power box, from the WPC95 Schematics manual if the machine was in a country with 200-240V it'll have a 4A fuse and you'll need to swap it out for an 5A.

Molex pinout for US 120V (resized).jpgMolex pinout for US 120V (resized).jpgvoltage jumper (resized).JPGvoltage jumper (resized).JPG
#13 3 years ago
Quoted from Berserk:

That's great stuff Manny, thank you! We hadn't considered the wiring at the molex connector. I do remember seeing a pigtail coming off of the molex, so you maybe on to something with it.
We will also check the fuse, we did this before to see if it was good (it was) but didn't check the amps. We will check these tonight!

Let us know what you find or if your voltage jumper is different post a pic of it - really interested to find out what's going on here

The fact the LED 501 (5v) is intermittent would seem that you have other issues besides the high voltage to the DMD

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