Rockford 800a2

[imraneesa]

It is 40v

 

[Perry Babin]

If y0u drive a strong signal into the amp, do you see a signal on the collectors of Q306 and Q307?

If yes, difference on level between the two collectors?

 

[imraneesa]

Q306 = 21.6v has square wave.
Q307 = 19.6v has square wave.

 

[Perry Babin]

Are those AC or DC voltages?

What did the output look like with those signals there?

 

[imraneesa]

What i mentioned are AC voltages.
DC voltages of Q306 is 8v and Q307 is 7.27v.
The output waveform is attached.
Q310 base and emitter has square wave but emitter has no wave.

 

[Perry Babin]

Q310 base and emitter has square wave but emitter has no wave. <<??

 

[imraneesa]

Sorry I mean collector has no wave. And the transistor is tested good I also changed it and no change.

 

[Perry Babin]

With the black probe on the emitter, what's the DC voltage on the base of Q310? No signal and with signal.

Do you have -15v on one terminal of R317?

Is R317 within tolerance?

 

[imraneesa]

Emitter to base with signal 3.7vdc
Emitter to base without signal 1.45vdc
R317 has -19.3vdc. Resistor is good.

 

[Perry Babin]

Are R323 and R325 within tolerance?

D302 still out of circuit?

 

[imraneesa]

Yes resistors R323 and R325 are good. D302 D305 are still out of circuit.

 

[Perry Babin]

Q307 open?

 

[imraneesa]

Yep. Thank you so much.