604 ohms.
Although it doesn't hold for all of the newer Rockford amps, in most amps, you can look at the counterparts in the other channel to find the value. In this amp, 1042 and 1043 are the same as 2042 and 2043.
Although it doesn't hold for all of the newer Rockford amps, in most amps, you can look at the counterparts in the other channel to find the value. In this amp, 1042 and 1043 are the same as 2042 and 2043.
I looked at the other 2 and all 4 were burnt in 2 pieces..
Left channel has very distorted output
Right channel has no output..
I replaced the resistors and they burnt up within 2 secs of power being applied..
So i guess i will have to take a look at what connects to them
Left channel has very distorted output
Right channel has no output..
I replaced the resistors and they burnt up within 2 secs of power being applied..
So i guess i will have to take a look at what connects to them
I replaced the A06 and A56 that connects to the 604 ohm resistors ..
Replace both resistors again and within 2 secs they burn up again..
Any ideas>?
Replace both resistors again and within 2 secs they burn up again..
Any ideas>?
It would appear that the bias transistor is not doing its job. It could be open, missing or has a bad connection between the MEHSA board and the main board.
I fixed the broken connection between the Meshaboard and the main board..
Amp is still burning up the resistors..
So at this point should i just replace the bias transistors since both channels are burning the resistors up ?
Amp is still burning up the resistors..
So at this point should i just replace the bias transistors since both channels are burning the resistors up ?
Did you conform, with a meter, that you have continuity between the legs of the 3-pin jumper and the bias transistor?
Shorted the bases The right channel the resistors burn up faster now..
The left channel they burnt up as well and also R1024 and R1025 also burnt up
The left channel they burnt up as well and also R1024 and R1025 also burnt up
Lift Q2009 and Q2010.
Remove the jumper.
Replace the two 604 ohm resistors. Do the resistors burn?
Does the amp draw excessive current with the bias pot fully counter-clockwise?
Does the bias pot work normally?
Do you have any DC across the speaker terminals for this channel?
Remove the jumper.
Replace the two 604 ohm resistors. Do the resistors burn?
Does the amp draw excessive current with the bias pot fully counter-clockwise?
Does the bias pot work normally?
Do you have any DC across the speaker terminals for this channel?
If i lift Q2009 and Q2010 the resistors no longer burn in that channel..
With the Bias pots fully counter clockwise the amp powers up and idle's perfectly..
Bias pots are working correctly..
I have -0.70 volts measured directly across the speaker terminals for the right channel
With the Bias pots fully counter clockwise the amp powers up and idle's perfectly..
Bias pots are working correctly..
I have -0.70 volts measured directly across the speaker terminals for the right channel
On R2024 i have 0 volts on 1 side and -13.65 volts on the other side
On R2025 i have 43.75 volts on both sides of it
On R2025 i have 43.75 volts on both sides of it
With the black probe on the ground terminal of the amp, what is the DC voltage on the negative terminal of C35?
Confirm that R63 and R65 are within tolerance.
Confirm that R63 and R65 are within tolerance.
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