Has anyone changed any resistors in that area?
The op-amp has almost certainly been damaged by the voltage.
The op-amp has almost certainly been damaged by the voltage.
Doesnt appear that any resistors have been replaced..
Do i need to follow pin 6 back and check all resistors , and diodes?
Do i need to follow pin 6 back and check all resistors , and diodes?
81 volts across speaker terminals
If i remove the op-amp and measure the voltage on pad 6 it drops to 9 volts
If i remove the op-amp and measure the voltage on pad 6 it drops to 9 volts
Do you happen to have a high res pic of the board around the op-amp section?
Also do you know the value of C405 (sits by the op-amps) it is cracked in half
Also do you know the value of C405 (sits by the op-amps) it is cracked in half
Yes the pic is perfect Thanks a ton..
Voltage on Pin 6 is still at 39 volts also voltage on speaker terminals is 39 volts measured directly across them..
Do i need to trace the circuit back from pin 6 and see why its still at 39 volts or any ideas what to look for ?
Voltage on Pin 6 is still at 39 volts also voltage on speaker terminals is 39 volts measured directly across them..
Do i need to trace the circuit back from pin 6 and see why its still at 39 volts or any ideas what to look for ?
R414 and R412 form a voltage divider that should drop the voltage from what's on the speaker terminals to 1/100th of that voltage. Confirm that the end of R412 that's nearest to the R412 printed on the board is directly connected to the negative speaker terminals. If it is, confirm that R412 is within tolerance.
Does anyone have a full schematic of the board? FET112 FET110, FET106, FET105, FET111, FET109, and D401 all got burned out. Can't read the D401. Fixable?
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