Copy and paste for following and fill in the blanks. AC volts.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Increase the input to about 1v at the RCA input and measure again.
Post the exact meter reading, including all zeros to the right.
Post the exact meter reading, including all zeros to the right.
cant get the volts at rca higher than 0.55 even at max gain
C9 .582-.695 .562-.634
C10 .550-.603 .287-.303
fluctuating slightly
C9 .582-.695 .562-.634
C10 .550-.603 .287-.303
fluctuating slightly
You're losing 1/2 of the signal across C10. It's either being loaded heavier than the other or it's defective.
Do you have a capacitance meter?
Do you have a capacitance meter?
Either replace, check or swap the two capacitors.
Since there is no real DC component, you may be able to jump the capacitor with a wire or another leaded capacitor.
Since there is no real DC component, you may be able to jump the capacitor with a wire or another leaded capacitor.
You shouldn't have to do that. If you can't easily get to the terminals, use a jumper wire to reach down to the terminals while measuring the output of that channel. With the jumper across the cap, does the level come up to the others?
Can you tell that I don't want you to damage the main board... as too many others have done. It's easy to do, difficult to repair properly and easy to avoid.
There have been so many images that have been sent to me via email and posted here that showed bits of the plated vias being ripped out of the main boards. This is permanent damage. It can be repaired to a point where the amp will function but the main board will always have damage. Would you want to buy an amp with that sort of damage?
Can you tell that I don't want you to damage the main board... as too many others have done. It's easy to do, difficult to repair properly and easy to avoid.
There have been so many images that have been sent to me via email and posted here that showed bits of the plated vias being ripped out of the main boards. This is permanent damage. It can be repaired to a point where the amp will function but the main board will always have damage. Would you want to buy an amp with that sort of damage?
Attachments
Are the RCA jacks feeding those capacitors directly?
Are you 100% sure that the level at the RCAs go into the board are precisely the same?
When posting these voltages ALWAYS post the exact meter reading. Even if they are zeros, post the number exactly as it's displayed on the meter. Your meter should display 3 digits to the right of the decimal point.
Are you 100% sure that the level at the RCAs go into the board are precisely the same?
When posting these voltages ALWAYS post the exact meter reading. Even if they are zeros, post the number exactly as it's displayed on the meter. Your meter should display 3 digits to the right of the decimal point.
well, i was wriggling the rca leads and the voltages changed. i swapped them with a new set and the voltages were the same. I rechecked the voltages at the speaker terminals whilst bypassing the two caps and found that c10 was the same as c9 both 2.5.