Question about Fender Audio Players & Recorders
No reverb! the reverb dial very slightly changes the tone of 'hiss' that is produced when speaker is at a high volume, but there is no sign of any reverb at all.
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Posted on Jan 02, 2017
SOURCE: fender deluxe reverb
I would start by changing out 12AT7 (V4), is a common buffer stage to the vibrato and reverb audio path. If you have trouble identifying it, you can just swap out with a known good tube and see if it resolves your problem.
If that does not help, then time to go see an amp doctor. If youy are inclined. here is a circuit diagram that you may find useful in faultfinding the problem yourself.
I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.
Posted on Jun 19, 2008
It sounds like a failure in the preamp stages, but fortunately you can do a lot of troubleshooting externally.
Drive the "power amp input" jack with another source of audio that has some reasonable output... like a small CD player. If this works (no mind the level, just the quality, that will verify if the power amp is OK.
If the power amp is OK, the use the preamp out to another amplifier.
If it is OK, then the Power amp input jack switch MAY be bad, When nothing is plugged into these, the preamp is sent to the power amp by a switch on the power amp input jack.
If you do these tests, you can email me the results and I will give further tests to run.
Posted on Nov 19, 2009
SOURCE: Hiss in new fender frontman 65R
A certain amount of "hiss" is present in electronic amps due to the statistical noise in electronics.
The hiss should be WELL below the level you get when playing. If you put you ear to the speaker, expect to hear some hiss with nothing plugged in. Ten feet away it should be very faint.
Posted on Dec 31, 2009
There's a power output IC ( circuit) mounted to a small heatsink inside.
These are known to go bad...something like TDA 3020 on the part maybe?
It has 5 pins
You can get them at digikey.com
Posted on Apr 14, 2010
You actually have the "B" version as the original 25R doesn't have RCA jacks. Anyway, on with your problem...
I want you to do a test: With a set of headphones plug them into the preamp output and then play your guitar... don't expect much loudness, it may be very faint and will ONLY be in one of the sides of the headphones. This tests the preamp section... have the guitar volume wide open.
IF you can hear the guitar that way, then the switch contact on the PA INPUT jack (not the preamp output) is not making contact. These jacks are really poor and the problem is not that uncommon. Fix is to open the unit and increase the spring tension on the contact or replace the jack. Never use the jack as they worsen evertime you plug something into it.
Note that the failing switch symptom MAY be broken soldering in the vicinity of the jack so look for that also. And also check the soldering of the guitar input jack as that is a common problem. Always loop your guitar cable through the handle so tripping over the cable doesn't break the jack by yanking the plug sideways... another common problem.
Posted on Mar 25, 2011
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