ranukic
Active Member
I was able to zero the voltage but I cannot get the bias adjusted above 20mA.
I rebuilt the F-2624 board replacing
R33/34 = 180ohm 1/2w
R39/40 = 10ohm 1/2w
R41-44 = 150ohm 1/2w
R47-50 = 4.7ohm 1/2w
TR1-4 = KSC1845
C01/02 = 0.47/50V audio grade nichicon
C05/06 = 470/6.3V audio grade nichicon
C07/08 = 330/63V audio grade nichicon
C09/10 = 100/25V audio grade nichicon
D01-04 = 1N4148
D05/06 = 2X 1N4148 in series
D07-16 = 1N4148
Zd01/02 = 1N525B
STV-3H = 3X UF1004 in series
I verified the readings of the following resistors that I did not replace
R21/22
R25-28
R31/32
R35-38
I also have a spare F-2624 board that I am getting the same readings with so I have confidence that the issue is not on the boards.
Does anyone have any suggestions for where I should check? Did I make a similar substitute mistake on both boards?
Also, does anyone have what the readouts should be on pins 05-28 where the amp board plugs into the power supply? I have found a few but I would like to record all the readings onto the schematic I have.
Thanks
I rebuilt the F-2624 board replacing
R33/34 = 180ohm 1/2w
R39/40 = 10ohm 1/2w
R41-44 = 150ohm 1/2w
R47-50 = 4.7ohm 1/2w
TR1-4 = KSC1845
C01/02 = 0.47/50V audio grade nichicon
C05/06 = 470/6.3V audio grade nichicon
C07/08 = 330/63V audio grade nichicon
C09/10 = 100/25V audio grade nichicon
D01-04 = 1N4148
D05/06 = 2X 1N4148 in series
D07-16 = 1N4148
Zd01/02 = 1N525B
STV-3H = 3X UF1004 in series
I verified the readings of the following resistors that I did not replace
R21/22
R25-28
R31/32
R35-38
I also have a spare F-2624 board that I am getting the same readings with so I have confidence that the issue is not on the boards.
Does anyone have any suggestions for where I should check? Did I make a similar substitute mistake on both boards?
Also, does anyone have what the readouts should be on pins 05-28 where the amp board plugs into the power supply? I have found a few but I would like to record all the readings onto the schematic I have.
Thanks