Shaka 5 debug help pls

[Al Heeley]

Heres the schematic to Jack orman's Shaka 5 version.
http://www.muzique.com/schem/shaka5.gif
I'm getting the following voltages at the semiconductors:
[Note: IC1 is not a TL072 dual op amp but a 4558 type]
[Note: Q1 & 2 are 5457 type instead of J201's]

IC: pin 1 = 9.18
Pin 2 = 9.18
Pin 3 = 9.6
Pin 4 = 9.6
Pin 5 = 9.23
Pin 6 = 9.18
Pin 7 = 9.09
Pin 8 = 9.62

Q1: d=9.62, s=9.62, g=9.57
Q2: d=9.62, s=9.62, g=9.17

Q3: d=g=8.96, s=9.35
Q4: d=g=9.62, s=8.7

[aron]

WOW, something's terribly wrong. It's like everything is shorted out to the power rail. The 4558 is a dual op amp.
Can we see the board and how are you measuring this?

[Al Heeley]

Here's the layout:
http://www.muzique.com/schem/shaka5a.gif
I have the -ve probe of the multimeter on the - of the battery and am probing the legs with the +ve probe

---oops , hold on, done something stupid - need the jack plug in to make the circuit, let me go measure again...

[aron]

Put the black probe on ground of the circuit and then probe around again.

[Al Heeley]

That's better:
IC:
1=8.9
2=8.9
3=0
4=0
5=4.0
6=4.8
7=4.76
8=9.4

Q1: g=0.05, s=0.7, d=5.38
Q2: g=4.5, s=5.38, d=9.44

Q3: d=g=0, s=0.01
Q4: d=g=0, s=0

Looks like some seriously poorly mosfets. The pins are reversed to the diagram but both share the common d&g's

[petemoore]

That's better:
IC:
1=8.9  These unused pins...
2=8.9....
3=0....
4=0 Gnd. [ok
5=4.0   Looks quite reasonable
6=4.8   Also good
7=4.76     Yupp
8=9.4     V+ [ok

Q1: g=0.05, s=0.7, d=5.38
Q2: g=4.5, s=5.38, d=9.44
  Q1 is the bottom of a Mu amp, the 'gain transistor, Q2 biases Q1.
  And I would move to the audio probe to try to find the problem.
  Actually I'd use thumbuzz, but an audio probe is a good way to isolate...the symptoms which prompt a debug.
Q3: d=g=0, s=0.01
Q4: d=g=0, s=0
  These are used as clipping diodes, and will reduce output 'some, they can be lifted for test, say, if signal is lost between the DC blockers where these reside.