ts5 help

[pfindeis]

Someone gave me a ts5 that doesn't work.
It passes signal in bypass but nothing when switched on.
I tried using a probe but am lost trying to figure it out.

Any ideas?

thanks, Pete

[The Tone God]

Follow the "DEBUGGING - What to do when it doesn't work" sticky and report back.

Andrew

[pfindeis]

that would work if i could follow the only schematic i found. it doesn't look the same as my ts5.
http://bryant02.home.att.net/schematics/TS5.gif

[George Giblet]

The PCB should have something like "PCB-TS5-101A" written down the edge of the board on the top overlay text.

I haven't trace the TS5 in detail but it sure looks like the schematic you posted the link for.

What feature makes you think otherwise.  The footswitch circuit is missing that's all.  The footswitch +JFET switching circuit is very similar to the TS9.  I think there was even a TS5 schematic around showing the footswitch circuit.

[TheBigMan]

Check the board for 2 2SK118 FETs.  Use your audio probe there and check to see if there is distorted signal there.  If there is then you have a switching problem, if not then it's in the signal path.

[wampcat1]

that would work if i could follow the only schematic i found. it doesn't look the same as my ts5.
http://bryant02.home.att.net/schematics/TS5.gif

That schem looks correct (minus switching, as pointed out). Audio probe may be your best bet.

bw

[George Giblet]

Is the LED is coming on?

[dosmun]

Check the Opamp

[Gus]

People the first thing you should check is the mini switch on the circuit board of a soundtank.

If it works in bypass. You know 1/2 of the fet circuit is good and the transistor buffers are working and there is a good chance the rest of the effect circuit is fine.  The switching section might be the problem

The switch in the sound tanks can sometimes go out of alignment with the plastic piece.

The switch operates a flip flop circuit that IIRC should always start the effect in bypass.

If the switch does not swich the circuit, jumper the connections like a momentary switch to check if the switch is bad

[pfindeis]

Ok this is really hard never having done this before but
I guess what confused me was that it didn't show the switching circuit.

the led is coming on

when i plug in my guitar and amp the is signal going through in bypass but no signal when the led is on.

i checked the opamp with the audioprobe and there is signal on pins 2 and 3. pin 3 seems to be a bit louder.
no signal on any other pins

thanks for everybody's help

Pete

[pfindeis]

any ideas or shall i throw it across the room

[dosmun]

Replace the opamp.

[petemoore]

  Yes, throw it first, that may correct something that is wrong with it...then..
  Follow the "DEBUGGING - What to do when it doesn't work" sticky and report back.
  As far as getting it to function, It may not be necessary to change the opamp, I would test it first./.

[Jay Doyle]

Gus has it nailed in my opinion.

The chance of it being the opamp is next to nil. Those are rated for a higher voltage than most of the caps in there. It is pretty hard to fry an opamp in our circuits with 9V, which in most cases is barely above the maximum value ratings of a lot of specs.