Need Fender Twin Reverb PR186 schematic

[MarkusBass]

I'm looking Fender Twin Reverb-Amp PR186 schematic. It looks like reissue. The tremolo circuit is solid-state on a separate PC board. Tremolo is not working and at the moment it blows fuses.

Mark

[g1]

I believe this is a 'european only' circuit, used in 65 Twin and 65 Deluxe re-issues in Europe. Pedro Vecino has posted about converting the 65 Deluxe re-issue to the old style circuit, but I have not come across a schematic of the SS trem board.

[MarkusBass]

Thanks, this is possible. The tremolo board is plugged in instead of the OP1 element:


And the tremolo board looks like this:


It seems that the reason that I cannot switch on the amp is that one, or two output tubes are shorted. I can switch on the amp with two tubes only. I may need to buy matched four.
Solving the problem with the tremolo may be more difficult.

Mark

[Enzo]

Contact Fender directly and tell them what you need. Mention the commonly circulated schematics do not include the solid state tremolo part, which seems to be problematical in your unit. See if they will provide the schematic.

[MarkusBass]

Thanks, I did it and I'm waiting for the answer.

[g1]

So it would seem there are 2 versions of the ss trem circuit. Not sure how old the amp you are working on is, attached is I think the early version of the ss ldr board.

[Enzo]

And be aware PR186 just means the Twin Reverb Reissue, not any one specific version of it.

[MarkusBass]

Thanks g1. This is exactly what I was looking for.

[MarkusBass]

Unfortunately, after providing a serial number of the amp to someone from Fender, instead of schematic I've got information about dimensions of the amp and shipping weight. This will not help me much. I'm curious what logic was used by the guy from Fender. I asked for schematic and got amp dimensions and weight . Very funny. Knowing the width of the amp I'll try to fix it .
If you need it, here it is:
Dimensions: Height: 19.87" (50.46 cm),
Width: 26.5" (67.31 cm),
Depth: 10.5" (26.67 cm)
Unit Weight: 64 lb (29.03 kg)
Shipping Weight: 70 lbs

Mark

[Enzo]

Yeah well, the real way around all that is to talk to them on the phone, which is a real long distance call for you.

[nickb]

You could try Fender UK:+44 333 200 8760 ask for parts.

[MarkusBass]

Thanks guys. I tried to be a little sarcastic but the truth is that I fixed the amp without the schematic.

[g1]

What was the fix?

[MarkusBass]

Following Fender approach I should list here the dimensions and weight of the amp .
The fix:
Shorted output tubes, the owner tried to use fast instead of slow fuses, shorted wires in the footswitch.

Mark