while u are at it.
Measure the DC voltage at speaker terminals.
Can u hear the relay click?

 

while u are at it.
Measure the DC voltage at speaker terminals.
Can u hear the relay click?

There is no relay
There are a couple of fuses on the back where the speakers connect tho

 

Theres 0.03V on each channel

 

How's the heat sink temp. ?
& the R's

 

How's the heat sink temp. ?
& the R's

So far so good

 

15 min in and still OK

 

Measure the voltage drop across each 22R now. Post em.

Next
Now disconnect power .
Connect one speaker, one channel, L or R.
Play a song. Do not increase volume. Keep it low, Hear it and confirm the sound at low level.
If u increase the volume u will blow the 22R.

Do not play too long, the resistor will heat up.

Check the other channel too.

And I like to know whether u used heat sink compound or not to mount the output stage.?

Power down and let it cool

 

Measure the voltage drop across each 22R now. Post em.

Next
Now disconnect power .
Connect one speaker, one channel, L or R.
Play a song. Do not increase volume. Keep it low, Hear it and confirm the sound at low level.
If u increase the volume u will blow the 22R.

Do not play too long, the resistor will heat up.

Check the other channel too.

And I like to know whether u used heat sink compound or not to mount the output stage.?

Power down and let it cool

Voltage drop is 22 across each resistor
And yes i used heat compound

 

Okay i have sound in both channels

 

Is it 2.2V or 22V ?

 

Is it 2.2V or 22V ?

I dunno. I measured resistance tho and it was 22 ohm. I think it 2.2V, i used the diode check functiom on my multimeter

 

I asked u to measure the DC voltage not the resistance.

The voltage drop across the 22R when the amp is idling

 

I asked u to measure the DC voltage not the resistance.

The voltage drop across the 22R when the amp is idling

30V +/- on the resistors

 

Tht's not correct.

Do u know ohm's law?

Across the Resistor.

 

Ohhhhhh... 3.4V

 

Both of them and are they stable when u are not playing music.

Read the page in the service manual marked ( page 29, I think)

3-6 POWER AMPLIFIER ADJUSTMENT.

But do not adjust anything yet.
Tell me do u understand what it says

 

Both of them and are they stable when u are not playing music.

....yes.....,..

 

Tell me when u are done reading as said in post #156

 

Tell me when u are done reading as said in post #156

Okay done. So basically its saying to adjust the potentiometers until theres 25mV on the emitter?!?!?!

 

Not on emitter.

Across the 0.47R Emitter resistors.

First measure the voltage drop across the 0.47R emitter resistor The amp shud be in idle mode. Volume down & the amp should be left on for around 10m to warm up to do this.

Measure each and post ur results. Do not turn the VR's