Back to this amp .
I replaced every single smd transistor, and diode in the output section . I checked every single resistors in the output section .
Replaced every single opamp .
Amp still does the same thing as soon as I apply remote it likes to burn resistors instantly.R216,217,211,same with the 300 series parts
It burns pretty much every resistor in the output section for both channels .
Anyone know why this amp would do this ?
I replaced every single smd transistor, and diode in the output section . I checked every single resistors in the output section .
Replaced every single opamp .
Amp still does the same thing as soon as I apply remote it likes to burn resistors instantly.R216,217,211,same with the 300 series parts
It burns pretty much every resistor in the output section for both channels .
Anyone know why this amp would do this ?
Lift Q11. Do those resistors still burn?
Are the ±15v. ±17v... voltages on the diagram as they should be?
Are the ±15v. ±17v... voltages on the diagram as they should be?
Even with Q11 lifted it just burned like 10 resistors .
The regulated voltages are not correct at the locations according to the diagram .
The regulated voltages are not correct at the locations according to the diagram .
I’m getting full rail voltage at the points where I’m only supposed to have 17 volts .
I’ve replaced every single smd transistor and diode in the output section checked every resistor and replaced the burnt ones several times replaced all of the opamps
R16 and R25 still burn open .
I don’t know what is causing this issue but getting tired of replacing half the resistors everytime I power the amp up they burn
I’ve replaced every single smd transistor and diode in the output section checked every resistor and replaced the burnt ones several times replaced all of the opamps
R16 and R25 still burn open .
I don’t know what is causing this issue but getting tired of replacing half the resistors everytime I power the amp up they burn
Ok I replaced all the burned resistors again .
Checked every single resistor, diode and transistor in the output section .
Checked the programming resistors for the regulators all test fine off the board .
Replaced all of the electrolytic capacitors in the output section to rule those out .
Replaced R16,25
Replaced Q11
Is there anything else I should check before I power this amp up again I don’t want it to burn the resistors again since this will be like the 5th time
Checked every single resistor, diode and transistor in the output section .
Checked the programming resistors for the regulators all test fine off the board .
Replaced all of the electrolytic capacitors in the output section to rule those out .
Replaced R16,25
Replaced Q11
Is there anything else I should check before I power this amp up again I don’t want it to burn the resistors again since this will be like the 5th time
I checked the values of the programming resistors since I still
Get 50 volts on all 3 legs for the LM317T
And I read post #88 it doesn’t matter if only 1 resistor is in at a time if R25 is in only it burns if R16 is in only it also burns
Get 50 volts on all 3 legs for the LM317T
And I read post #88 it doesn’t matter if only 1 resistor is in at a time if R25 is in only it burns if R16 is in only it also burns
Ok I just replaced both regulators since they were shorted .
Anything else I should check before powering it up again I just don’t wanna burn the resistors since it a a lot of work to check everything again and replace the resistors when they burn
Also will the IRF3205Z’s work in this amp or should I use the non Z version
Anything else I should check before powering it up again I just don’t wanna burn the resistors since it a a lot of work to check everything again and replace the resistors when they burn
Also will the IRF3205Z’s work in this amp or should I use the non Z version
Last edited:
Amp powers up but I don’t get any regulated voltages .
I have +- 41 volts of rail voltage but no regulated voltages and the voltages on the gate legs for the fets is 8 volts
I have +- 41 volts of rail voltage but no regulated voltages and the voltages on the gate legs for the fets is 8 volts
R16
20.65
0.64
R25
-19.34
0.65
What value resistors go in these locations ?
According to the schematic they are 1k but if I put 1k resistors I the amp I don’t get and regulated voltages on the opamps
20.65
0.64
R25
-19.34
0.65
What value resistors go in these locations ?
According to the schematic they are 1k but if I put 1k resistors I the amp I don’t get and regulated voltages on the opamps
R16
20.65
0.64
R25
-19.34
0.65
What value resistors go in these locations ?
According to the schematic they are 1k but if I put 1k resistors I the amp I don’t get and regulated voltages on the opamps
20.65
0.64
R25
-19.34
0.65
What value resistors go in these locations ?
According to the schematic they are 1k but if I put 1k resistors I the amp I don’t get and regulated voltages on the opamps
The diagram says 1k. I don't know if that's an error. I doubt it is.
Remove Rx07 and Rx09 (4 resistors).
Do the resistors R16 and R25 heat up? Freeze them and tap remote until they begin to heat up. Do they heat up before the mute delay ends?
Remove Rx07 and Rx09 (4 resistors).
Do the resistors R16 and R25 heat up? Freeze them and tap remote until they begin to heat up. Do they heat up before the mute delay ends?
No they don’t heat up before the mute delay ends .
Do you have a picture of an 800a2 showing the area of R16 and R25 the 800a2 is the same board same layout .
I just want to confirm these are the correct value resistors since I do not get regulated voltages on the opamps
Do you have a picture of an 800a2 showing the area of R16 and R25 the 800a2 is the same board same layout .
I just want to confirm these are the correct value resistors since I do not get regulated voltages on the opamps