Turned on the Poly 61 this morning and no sound, no read-out in program/parameter indicator; leds are stuck on for program, parameter, write and hold buttons. I’ve was happily playing this instrument last night; no thunderstorms, all the other synths connected to the same power are working fine. I didn’t see any troubleshooting section in the manual. Any ideas?
Some thing to check:
- Fuses on the power supply board.
- If your comfortable with a meter check the voltages on the power supply (CN24A connector)
Should be +15, -15 and +5VDC. - Check the on-board battery on the main board for leakage. The battery acid will corrode the copper traces on the main board affecting operation.
- Capacitors on the power supply should be changed due to their age.
Hope this helps.
Thanks, I “fixed” it by opening it up and closing it again. I’ll open it up again and follow these suggestions
Definitely check for battery leakage - that can make a huge mess of the circuit board. If it’s just starting to leak, fix it now before it spreads. I think the battery is more prone to leak after sitting unused for many months.