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Does anything happen depending with change the position of the SW3 (line / reverse)
Input Jacks are insulated from the chassis via an insulating washer.
The preamp gets grounded over the shielded cable P3/ J3 (RCA jack)
Check shielded cable and RCA jack (P3 / J3)
From experience knows that female J3 oxide. Clean the any oxide or replace it.
The loudspeaker connection at the output stage is solid, with no output jack.
If there is a speaker jack, it must be insulated from the chassis.
Amp is earthed at one point.
Ground from grounded plug solder to earthed point amplifier.
The earthed point amplifier is the end of the ground capacitor (C25) that goes to the chassis.
For amplifiers with grounded plug removal (deleted) ground capacitor (C25) between line/ reverse switch and chassis.
See Note-Ground Switch on any SF Fender schematics
http://www.cnjradio.net/fenderamps/twin_reverb_sf_100_schem.jpg
Does anything happen depending with change the position of the SW3 (line / reverse)
Input Jacks are insulated from the chassis via an insulating washer.
The preamp gets grounded over the shielded cable P3/ J3 (RCA jack)
Check shielded cable and RCA jack (P3 / J3)
From experience knows that female J3 oxide. Clean the any oxide or replace it.
The loudspeaker connection at the output stage is solid, with no output jack.
If there is a speaker jack, it must be insulated from the chassis.
Amp is earthed at one point.
Ground from grounded plug solder to earthed point amplifier.
The earthed point amplifier is the end of the ground capacitor (C25) that goes to the chassis.
For amplifiers with grounded plug removal (deleted) ground capacitor (C25) between line/ reverse switch and chassis.
See Note-Ground Switch on any SF Fender schematics
http://www.cnjradio.net/fenderamps/twin_reverb_sf_100_schem.jpg
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