Let's Get Technical > Troubleshooting Problems

No Sound

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2ndmoto:
Hello Gents and Dames

Bought a MP-1 years ago off Ebay. After receiving it I never was able to get it to work. It Powers up fine, turning the OD1 and 2 to 10 and turning the Voicing all the up and I don't get any sound or any clipping LEDS. I replaced the tubes and still nothing. Tried both jacks (front and back). So I put it on the shelf and it has been sitting.

Seeing the Depot was back up, I thought I would dig around on here. I haven't seen any posts about this. Wanted to check and see if anyone has suggestions



Best Regards
-Jason 

MarshallJMP:
So no sound on both tube and SS channels?

2ndmoto:
Thanks for the reply,

Correct. No sound on clean, dist or S.S.. I did check voltage at the tube board. it was right at 198 VAC. However on the 6pin connector coming from the transformer, I am getting 16.5VAC between pins 4-6 and 5-6. Isnt this supposed to be 20ish? 

Best Regards
-Jason

Peter H. Boer:
If you have no sound on the SS channel too, it probably isn't a tube problem.

Sparker:
Check you have +15V DC and -15V DC across each of the big capacitors C124 (+15V DC) and C121 (-15V DC) near the transformer.

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