I was working on an upgrade of a Wiliams GG1 and installed electro couplers I removed the R2LC from the DC commander to route some wires. Replaced the R2LC and all the pins are correctly lined up. The couplers work and lights do also. When I try to reverse directions the lights will change but the motors only run in one direction. Any suggestions?
Thanks, Marty
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First stop would be to check the PGM/RUN switch, if it's in PGM it's a direction lock in conventional mode. Since you didn't say if you're testing in conventional or command mode, that's one thing that comes to mind.
John
Sorry I forgot to indicate this is occurring in command mode. Rechecked all of my wiring, could not find any problems I looked at the R4LC a cap (with arrow) might be slightly swollen. I included a picture.
Marty
Did you swap out the R2LC to see if it follows the board? The only way I can imagine the R2LC would do this is if one of the motor drive PWM outputs was dead. There is a forward and reverse PWM output, if one of those didn't function, that's what you'd see.
Yes I tried another R2LC with same results. Is that repairable or does it require a replacement of the board? Is the PWM on the R2LC or on the main board.
Marty
It sounds like the DC Commander has a problem, if the R2LC signals are good, they go directly to the motor driver on the DC Commander.
My first step is to check to see if there are components that aren't soldered correctly. On several of the ERR boards, I have discovered things like one side of a resistor not soldered. AAMOF, that exact symptom happened about a year ago on a customer install, and it turned out to be a poorly soldered component on the PWM signal path.
John,
I will take the board our tomorrow and see if everything is tight on the board. Thanks for your help
Marty
Inspect the SMT components closely to see if there's one end that didn't get soldered or has a poor solder joint.
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