(Topic ID: 198509)

Tech: Bally Power Supply High

By TheCnyPinGuy

6 years ago



Topic Stats

  • 9 posts
  • 7 Pinsiders participating
  • Latest reply 6 years ago by G-P-E
  • Topic is favorited by 1 Pinsider

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    #1 6 years ago

    Hello All

    Working on a Kiss Bally

    Worked Perfect

    Moved from my buddy to my place

    Not no lamps on either driver work

    Test Point 1 is 44vdc - should be in the 6vdc range

    Any ideas why it would be so high ?

    No controlled lamps work right now

    If I play some I get a Super Bright flicker here and there

    Let me know what to look for on this game I assume in the J3 connector on PSU Transformer

    Thank you

    #2 6 years ago

    I will add that I did replace the 3 connectors on the board as the J1 and J2 were burnt and the pins on the board

    Also the headers on J3 but left connector alone as it was not burnt at all

    So really I would assume in did something wrong and now I messed up the Voltage to feature lamps

    Help me

    #3 6 years ago

    My initial thoughts are that one of two things has happened ~ either the transformer itself is going south and generating the wrong voltage (rarely happens) or a wire on the rectifier board is shorting out somewhere. Remove the rectifier and have a look at the back to ensure that all the solders are intact. The wires from the transformer to rectifier get pretty brittle and moving the game could have caused a short of some kind.

    Were J1 and J2 burnt BEFORE your problem or AFTER ?

    #4 6 years ago
    Quoted from TheCnyPinGuy:

    Hello All
    Working on a Kiss Bally
    Worked Perfect
    Moved from my buddy to my place
    Not no lamps on either driver work
    Test Point 1 is 44vdc - should be in the 6vdc range
    Any ideas why it would be so high ?
    No controlled lamps work right now
    If I play some I get a Super Bright flicker here and there
    Let me know what to look for on this game I assume in the J3 connector on PSU Transformer
    Thank you

    double check your work. sounds like your solenoid voltage is on the feature lamps. The bright flickers... lamps getting burned out?

    the bally wiring diagram page has color codes. You can use that and the schematic page to check the pin outs of the rectifier plugs.

    #5 6 years ago

    Triple check your work. Look for a wire out of place or a connector shifted over one pin (missing keying plug in housing).

    Did you have to behead the game for the move?

    #6 6 years ago

    And if you did indeed put +43VDC solenoid power to the controlled lights, expect to have a ton of burned out light bulbs, and some shorted or open SCRs on the lamp driver board.

    I encountered one game just like this where someone had put the fuses back in in-between fuse holders! Thereby feeding 43V to the feature lamps. And did some other damage too.

    #8 6 years ago

    Thank you I will double check this all again

    Yes I had to remove the head

    And I took pictures of my work before and after

    But I'll check again

    Worst case I'll order a new board

    This one has tons of burnt pads and jumpers etc

    Thank you all

    IMG_4139 (resized).PNGIMG_4139 (resized).PNG

    #9 6 years ago

    If staying with bottom mounted bridge rectifiers then you should replace both of them at the same time with the same type - even if one of them is still good. The tops MUST be flush with each other. The new bridges are slightly thicker, this will interfere with the shorter bridge rectifier in making contact with the heat sink.

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