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Rustbucket Help

Started by Vtguy22, March 15, 2020, 05:28:29 PM

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Vtguy22

Hello,
  I am trying to debug my Rustbucket and am not having much luck.  The bypass seems to work fine, as does the blend.  No effect seems to be coming through though.  Below are my voltages and pics.  Any help would be appreciated.

IC1
1  0
2  0
3  0
4  -14.6
5  0
6  -1.8
7  .46
8  14.68

IC2
1  12.58
2  0
3  0
4  -14.6
5  -2.5
6  -1.8
7  14.68
8  12.20

IC3
1  0
2  0
3  0
4  -14.6
5  0
6  0
7  -.5
8  14.7

IC4
1  0
2  0
3  0
4  -14.6
5  0
6  0
7  .9
8  14.7

IC5
1  -7.3
2  -7.3
3  -7.3
4  0
5  0
6  0
7  -14.6
8  -14.6
9  -14.6
10  -7.2
11  -8.8
12  -14.6
13  -7.4
14  0

IC6
1  0
2  -7.1
3  -2.4
4  -13.5
5  -14.6
6  -8.8
7  -13.8
8  -13.8

IC7
1  0
2  14.5
3  0
4  0
5  0
6  1.8
7  0
8  0
9  0
10  0
11  0
12  0
13  14.55
14  14.55

IC8
1  0
2  0
3  14.4
4  0
5  0
6  1.8
7  0
8  0
9  0
10  0
11  0
12  14.5
13  0
14  14.5

IC9
1  0
2  0
3  0
4  -14.6
5  0
6  0
7  0
8  14.6

IC10
1  0
2  0
3  11.7
4  0
5  14.4
6  14.4
7  0
8  14.5

IC11
1  0
2  0
3  0
4  -14.6
5  -14.6
6  0
7  14.6
8  0

IC12
1  -14.2
2  0
3  0
4  -14.6
5  -14.4
6  0
7  14.7
8  0

IC13
1  5.09
2  0
3  -14.6
4  0
5  14.7


Q1
  .98
  1.3
  -2.5
Q2
  0
  -.5
  -1
Q3
  .88
  1.49
  .92
Q4
  .88
  1.48
  1.8
Q5
  0
  72mv
  -14.4
Q6
  .48
  0
  -5.2
Q7
  -14.6
  -14.6
  -14
Q8
  -14.6
  -14
  -14.6


Thank You,
Paul.

Scruffie

You need to re-flow that board first, I can see several cold joints.
Works at Lectric-FX

Vtguy22

Thanks, did that, it behaves the same.

jimilee

The above picture shows a missing a transistor, is it still missing.


Sent from my iPhone using Tapatalk
Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

Scruffie

Obviously Jimi's point is very important (nice catch!) but if it is installed, did your voltages change with the re-flow?
Works at Lectric-FX

Vtguy22

Thanks, yup it was there for testing.

The voltage changes were small, here are the new values:

IC1
1  0
2  0
3  0
4  -14.6
5  0
6  -1.4
7  .52
8  14.68

IC2
1  12.58
2  0
3  0
4  -14.6
5  -2.5
6  -1.8
7  14.68
8  12.20

IC3
1  0
2  0
3  0
4  -14.6
5  0
6  0
7  -.5
8  14.7

IC4
1  0
2  0
3  0
4  -14.6
5  .44
6  .46
7  1.07
8  14.7

IC5
1  -7.3
2  -7.3
3  -7.3
4  0
5  0
6  0
7  -14.6
8  -14.6
9  -14.6
10  -7.2
11  -8.8
12  -14.6
13  -7.4
14  0

IC6
1  0
2  -7.1
3  -2.4
4  -13.5
5  -14.6
6  -8.8
7  -13.8
8  -13.8

IC7
1  0
2  14.5
3  0
4  0
5  0
6  2
7  0
8  0
9  0
10  0
11  0
12  0
13  14.55
14  14.55

IC8
1  0
2  0
3  14.4
4  0
5  0
6  2
7  0
8  0
9  0
10  0
11  0
12  14.5
13  0
14  14.5

IC9
1  0
2  0
3  0
4  -14.6
5  0
6  0
7  0
8  14.6

IC10
1  0
2  0
3  11.7
4  0
5  14.4
6  14.4
7  0
8  14.5

IC11
1  0
2  0
3  0
4  -14.6
5  -14.6
6  0
7  14.6
8  0

IC12
1  -14.2
2  0
3  0
4  -14.6
5  -14.4
6  0
7  14.7
8  0

IC13
1  5.09
2  0
3  -14.6
4  0
5  14.7


Q1
  .98
  1.3
  -2.5
Q2
  0
  -.5
  -1
Q3
  .88
  1.49
  .92
Q4
  .88
  1.48
  1.8
Q5
  0
  140mv
  -14.4
Q6
  .48
  -.5
  -6.3
Q7
  -14.6
  -14.6
  -14
Q8
  -14.6
  -14
  -14.6