Hendrix Silicon Fuzz Face Mini - repair, or recycle?

[newfish]

Hi All,

Apologies if this is a recurring topic.  I have searched to see if anyone else has had similar issues, but couldn't find a thread describing these issues.

I bought a used Dunlop Jimi Hendrix Silicon Fuzz Face Mini (the paler blue one).
All has been good for the past few months, but the pedal has now stopped dealing out the rich, full amounts of fuzz we all know and some of us love.

The PCB is mostly SMD, with some sort of bypass circuitry going on (6-pole bypass switch with status LED).
The pedal is true bypass (I proved this by removing the battery).

The fuzz the unit now produces sounds anaemic, and a bit farty.

Here are the voltages from a known-good (9.1v) battery...

Q1 -
C 1.19v (I know this is too high)
B 0.55v
E 0.0v

Q2 -
C 4.55v
B 1.19v
E 0.58v

I have replaced the 33k resistor (SMD jobbie - toothpick and Jeweller's Loupe were a great help here) from the 9v supply to Q1's Collector, as this should be more like 0.5 - 0.7v, but the voltage remains the same.

Q2'S Base also looks to be too high, as it's being fed from Q1's Collector.

I've also replaced the transistors with a new pair of BC108s - both of which gave acceptable hfe readings before I soldered them in place.

I'm very much out of practice in troubleshooting, having not really built / fixed many pedals of late.

If anyone has any suggestions what to check next, I'd really appreciate the help.

[PRR]

Q1 -
C 1.19v (I know this is too high)

No; Q1 C should be two Vbes or 1.2V. It has to feed the Vbe of Q2, plus the drop at Q2 E, which comes around to Q1B, so should be Q1 Vbe. {EDIT} Germanium would be lower, tenths of a Volt, but the Subject says Silicon.

I wonder about capacitors?

[amptramp]

Every electrolytic capacitor is suspect and the fuzz control on a Fuzz Face is an electrolytic capacitor that is used to reduce the amount of signal feedback from the Q2 emitter to the Q1 base.  If the series resistance of this capacitor goes up, you will not get the full range of fuzz, rendering it anemic.  If the capacitance drops, fuzz will be limited at low frequencies, giving you something of a farty sound because the higher frequencies have to ride along with the less controlled low frequencies.

SMD electrolytic capacitors are at least large enough that you won't lose them on your workbench.

[newfish]

Thanks guys - it turns out that the input cap (2u2) was duff. 
I replaced that, and I now have all the fuzz I could ever wish for.

Cheers!