johnvv
Member
Repairing the motor board on a Midway Wild Kingdom EM shooter and am having trouble identifying replacement parts. Probably an easy task for most, but hard for me... The board is circa 1971.
The only known documentation for the game is the schematic. From that, I have the value of some the parts. Attached is a picture of the board with either part value (from the schematic) or part # (from the actual part). It has taken me a bit to get this far and am hoping the gurus here can help me get to the home stretch so I can get modern replacement parts ordered.
Questions:
1. There are 5 x 3 leg "22K Trim POTS' on the board. No other specs known. Any suggestions on replacements? This the part that is in greatest need of replacement as they barely move anymore and are control the targets.
2. In the top center, you'll see a 4.7K ohm resistor, per the schematic. The color bands are (left to right) yellow, silver, red, green, brown. I'm guessing this is really a four band resistor and the brown is 'extra' as it makes no sense. Suggestions on what type of resistor and associated values to replace with?
3. Middle of the pic, 2 x .022uF +/-10% @ 250V polyester cap (thick red on top, orange, yellow, red). Leads are 10mm apart. Any suggestions for a modern, in stock, replacement?
4. Lower middle of the pic, 2 x .1uF +/-10% @ 250V polyester cap (thick brown on top, black, yellow, white, red). Leads are 10mm apart. Any suggestions for a modern, in stock, replacement?
5. For the resistors, what composition of resistor should I replace with: carbon comp., carbon film., ceramic comp., etc.?
The parts in question appear to be original parts based on their solder points, but you never know. I'm most confident the POTs are original. Other parts on the board have been replaced over the years (e.g. parts on left side are mostly replacements while parts on right side appear mostly original).
Thanks in advance for any suggestions and help.
The only known documentation for the game is the schematic. From that, I have the value of some the parts. Attached is a picture of the board with either part value (from the schematic) or part # (from the actual part). It has taken me a bit to get this far and am hoping the gurus here can help me get to the home stretch so I can get modern replacement parts ordered.
Questions:
1. There are 5 x 3 leg "22K Trim POTS' on the board. No other specs known. Any suggestions on replacements? This the part that is in greatest need of replacement as they barely move anymore and are control the targets.
2. In the top center, you'll see a 4.7K ohm resistor, per the schematic. The color bands are (left to right) yellow, silver, red, green, brown. I'm guessing this is really a four band resistor and the brown is 'extra' as it makes no sense. Suggestions on what type of resistor and associated values to replace with?
3. Middle of the pic, 2 x .022uF +/-10% @ 250V polyester cap (thick red on top, orange, yellow, red). Leads are 10mm apart. Any suggestions for a modern, in stock, replacement?
4. Lower middle of the pic, 2 x .1uF +/-10% @ 250V polyester cap (thick brown on top, black, yellow, white, red). Leads are 10mm apart. Any suggestions for a modern, in stock, replacement?
5. For the resistors, what composition of resistor should I replace with: carbon comp., carbon film., ceramic comp., etc.?
The parts in question appear to be original parts based on their solder points, but you never know. I'm most confident the POTs are original. Other parts on the board have been replaced over the years (e.g. parts on left side are mostly replacements while parts on right side appear mostly original).
Thanks in advance for any suggestions and help.