[HELP] Madbean Pork Barrel/Boss CE-2 no signal

Started by slim_blues_boy, August 01, 2013, 01:10:30 PM

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slim_blues_boy

hi,

tried to build a CE-2 clone using Madbean Pork Barrel layout.
after all the work done, no signal at all when I tried it :icon_cry:

here is the voltage list (using LM317 Tonepad power supply):

IC 1 (JRC4558D)
1 = 2.8v
2 = 2.8v
3 = 2.8v
4 = 0v
5 = 2.8v
6 = 2.8v
7 = 2.8v
8 = 9.3v

IC 2 (TL062)
1 = 3.6 - 6.2v
2 = 4.6v
3 = 4 - 5.3v
4 = 0v
5 = 4.6v
6 = 4.6v
7 = 4 - 5.3v
8 = 9.3v

IC 3 (MN3101)
1 = 9.3v
2 = 4.7v
3 = 0v
4 = 4.7v
5 = 0.25v
6 = not used (8.4v)
7 = 2.5v
8 = 0.6v

IC 4 (MN3007)
1 = 9.3v
2 = 4.7v
3 = 4 - 4.3v
4 = 0.6v
5 = 0v
6 = 4.7v
7 = 6.2 - 6.4v
8 = 6.2 - 6.4v

Q1 (2N5088)
E = 1.4v
B = 1.9v
C = 9.3v

Q2 (2N5088)
E = 5v
B = 5.6v
C = 9.3v

Q3 (2N5088)
E = 2v
B = 2.5v
C = 9.3v

Q4 (2N5088)
E = 0v
B = 0.3v
C = 8.3v

Q5 (2N5088)
E = 0.4v
B = 0.9v
C = 9.3v

anybody has voltage reference from working unit, and maybe can show me what's wrong with mine?

got the BBD from China/Hong Kong, bad/fake BBD chips maybe?
or any other problems?

thank you

slim_blues_boy

updated voltage measurement

IC 1 (JRC4558D)
1 = 9.11v
2 = 9.09v
3 = min 0.13v, max 0.44v (from VB trim)
4 = 0v
5 = min 0.13v, max 0.44v (from VB trim)
6 = 8.79v
7 = 8.8v
8 = 9.17v

IC 2 (TL062)
1 = 1-7.9v (fluctuating, approximately)
2 = 4.4v - 4.7v (fluctuating, approximately)
3 = 3.2v - 6.1v (fluctuating, approximately)
4 = 0v
5 = 4.4v - 4.7v (fluctuating, approximately)
6 = 4.5v - 4.7v (fluctuating, approximately)
7 = 3.3v - 6.2v (fluctuating, approximately)
8 = 9.17v

IC 3 (MN3101)
1 = 9.1v
2 = 4.63v
3 = 0v
4 = 4.66v
5 = 0.25v
6 = 8.25v
7 = 2.5v - 2.9v (fluctuating, approximately)
8 = 0.59v

IC 4 (MN3007)
1 = 9.11v
2 = 4.66v
3 = 2.5v
4 = 0.59v
5 = 0v
6 = 4.63v
7 = 2.86v
8 = 2.86v

Q1 (2N5088)
E = 7.45v
B = 8.15v
C = 9.17v

Q2 (2N5088)
E = 2.63v
B = 3.15v
C = 9.17v

Q3 (2N5088)
E = 0v
B = min 0.13v, max 0.44v (from VB trim)
C = 9.17v

Q4 (2N5088)
E = 0v
B = 0.28v
C = 8.49v

Q5 (2N5088)
E = 1v - 3.2v (fluctuating, approximately)
B = 1.7v - 3.9v (fluctuating, approximately)
C = 9.11v

still got nothing but crackling noise. any help?