Roland JC-120: no effects working, any tips?

[g1]

At the base of that transistor is D6, 15V zener.  Have you checked it and it's connections?

[rens]

At the base of that transistor is D6, 15V zener.  Have you checked it and it's connections?

Thanks for this reminder, the diode is blown and shorts to ground! I'll look for a replacement.

[rens]

Dear all, swapping the diode D6 did it; everything works fine. Thanks to all of you who helped, without you I would have been clueless!

Things that I fixed:
- disconnected legs 3 and 4 of IC5 (op-amp) that were connected during a previous faulty fix by someone; this restored the -15V supply.
- Replaced R195 in the power supply section for good measure, as its resistance was too low and might have blown something.
- Replaced transistor 2SC1624Y with a 2SD726 as the former measured 'closed'
- Replaced Zener diode D6 to restore +15V supply

Thanks again, everyone!

[phatt]

 :dbtu:
Good to hear you resolved the problem,, enjoy
Phil.