Reverb problem I have a Fender Roc Pro 1000 guitar amplifier and the reverb stopped working on it. I turn the knob all the way up and down and no reverb comes from it. Anyone know how I can fix this without having to pay for a store to do it?

Deciding the date depends on what part of the amp your serial number is.

This site might help:

http://www.fender.com/support/articles/amplifier-product-dating

Sch: http://www.schematicx.com/schematic/fender-acoustasonic-junior-jr-guitar-amplifier-schematic/

The unit is screwed down. There are two screws one at each end. Look hard you will find them. Most of the time there is a small transducer (coli of wire) the small wires are usualy broke.

The reverb should be quite strong. I would first look at the reverb volume pot R42 which is a 50K pot. I would also check the voltages on the test points near U4 (TLO-72 op amp tp13 and tp14) which amplifies the signal coming out of the box. It is possible the box has low power levels as well.
The problem is going to be around that section of the board if it isn't a dirty or dead(ish) pot.


The reverb should be noticeable enough to be annoying ;-]

Fender Amplifiers are notorious for their reliability issues.However, I'm sure that amp will sound sweet once you get everything working again!

The problem is likely your "tank". The tank contains the springs which create reverb as the guitar's signal is sent through them. A broken spring could be causing your problem.

Luckily, any of the larger music stores should have them avalible.

Good Luck!

-Sheeves

Your reverb spring is most likely broken. If it has electronic reverb, then the chip has gone out. For both of these problems, a qualified amplifier technician will have to look at it and replace the parts.


Hope that helps!

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First check if the reverb "tank cables" are on tighly where they attach.

If you touch each wire, the one that receives the output of the tank should hum. Quick and dirty test.

Here is an article that might help:http://www.guitarplayer.com/article/reverb-troubleshooting/jun-09/97165 Here is the schematic:http://www.fender.com/support/amp_schematics/pdfs/Hot_Rod_DeVille_Schematic.pdf Check to see if someone hasn't reversed the input and output cables at the reverb tank. Then troubleshoot the reverb section .

Try this article first for some ideas. http://www.guitarplayer.com/article/reverb-troubleshooting/jun-09/97165.