(Topic ID: 213404)

Bally Corvette Schematics Dual H-Drive Board

By pinball_player

6 years ago



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IMG_2614 (resized).JPG
Road Show Dual H Schematic (resized).jpg
Motor Driver Board (resized).jpg
#1 6 years ago

Does anyone have a digital copy of the Bally Corvette schematic for the Dual H-Drive Motor Board? Specifically looking to know the value of the two ceramic resistors R13 and R27 and/or compatibility with Williams Road Show if anyone has experience.

Motor Driver Board (resized).jpgMotor Driver Board (resized).jpg

#2 6 years ago

Here is the road show schematic I am looking to compare against. The value listed for R13 and R27 in the road show manual is 5.5K Ohm at 5W - which is wrong - the board actually has a 5 Watt, 5.6 Ohm at 5% resistor installed. Based on the pic in my first post, I would guess the values for the corvette board are 5 Watt at 5 Ohm - can anyone confirm value or compatibility with Road Show?

Road Show Dual H Schematic (resized).jpgRoad Show Dual H Schematic (resized).jpg
IMG_2614 (resized).JPGIMG_2614 (resized).JPG

#3 6 years ago

If the boards are the same part number, then they are compatible. Let 'er rip.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info

1 year later
#4 4 years ago

Chris, can you repair these boards? I’ve got one that will run one motor but not the other. If you swap motor connections the other motor does run. Something in that board putting power out to one motor connector but not the other. Thanks! Mìke

Quoted from ChrisHibler:

If the boards are the same part number, then they are compatible. Let 'er rip.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#5 4 years ago
Quoted from MikeSinMD:

Chris, can you repair these boards? I’ve got one that will run one motor but not the other. If you swap motor connections the other motor does run. Something in that board putting power out to one motor connector but not the other. Thanks! Mìke

Yes sir. I can.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

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