Weird sound / fixing accent

[x0xjesus]

I bought used x0xb0x for cheap price (mode machines) from eBay and some of it transistors have been replaced with 2SC536F transistors ... When I test it, it sounds like this (on beginning of clip, the accent is zero and at the end, it is on full):

https://www.dropbox.com/sh/r12psr9huwu5jwo/PiVRMA-RSM

Oscilloscope is on a way... Any suggestion how/what to measure to make it sound right?

Is it matter of tuning or is there more serious problem?

[antto]

it's pretty ugly
i can't say exactly, but it's as if there is severe DC offset somewhere
..in the VCA, or the VCF, i'm not sure

[x0xjesus]

here is a list of old transistors (which came with the machine)
and new ones, which were replaced :

Q20 = old C563KF5H = new 2SC563F
Q19 = old C563KF5H = new 2SC563F
Q18 = old C563KF5H = new 2SC563F
Q50 = old C563KF5H = new 2SC563F
Q5 = old C563KF5H = new 2SC563F
Q37 = old C563KF5H = new 2SC563F
Q32 = old C563KF5H = new 2SC563F
Q30 = old C563KF5H = new 2SC563F
Q40 = old C563KF5H = new 2SC563F
Q41 = old C563KF5H = new 2SC563F
Q24 = old C563KF5H = new 2SC563F
Q35 = old C563KF5H = new 2SC563F
Q29 = old C563KF5H = new 2SC563F

Q17 = old C1819GR2E = new 2SC563F

Q4 = old H945K2K4 = new 2SC563F
Q3 = old H945K2K4 = new 2SC563F

Q2 = old A733K13C = new 2SC563F

Q11 = old H945K2K4 = new 2SC563F
Q13 = old C1815GR2E = new 2SC563F
Q23 = old C1815GR2E = new 2SC563F
Q14 = old C1815GR2E = new 2SC563F
Q17 = old C1815GR2E = new 2SC563F
Q15 = old C1815GR2E = new 2SC563F
Q16 = old C1815GR2E = new 2SC563F

[MMM]

Q2 = old A733K13C = new 2SC563F

Please check again - this will not work correctly; Q1 and Q2 need to be 2SA733.

[x0xjesus]

Q2 = old A733K13C = new 2SC563F

Please check again - this will not work correctly; Q1 and Q2 need to be 2SA733.

You are right. I replaced the Q2 transistor and now the x0xb0x seems to work.