Isn’t the led supposed to be blue when the amp is working normally ?
I’m getting rail and regulated voltages .
But the led is red if I remove the regulators the led will turn to blue .
I’m getting rail and regulated voltages .
But the led is red if I remove the regulators the led will turn to blue .
Ok I’m getting a problem with IC706.
It’s a LM317
With it in circuit I’m not getting proper voltages .
With it removed from the board this is what I get on the pads for it
Leg 1:-26.33
Leg 2:-26.22
Leg 3:0.00
It’s a LM317
With it in circuit I’m not getting proper voltages .
With it removed from the board this is what I get on the pads for it
Leg 1:-26.33
Leg 2:-26.22
Leg 3:0.00
I removed all of the regulators off the board since it didn’t make any sense .
Here is what I get on all of the pads now
IC705
Leg 1: pulsing voltage
Leg 2:-27.25
Leg 3: pulsing voltage
IC704
Leg 1:-0.68
Leg 2:-0.71
Leg 3:27.33
IC706
Leg 1:-25.36
Leg 2:-25.36
Leg 3:0.00
Here is what I get on all of the pads now
IC705
Leg 1: pulsing voltage
Leg 2:-27.25
Leg 3: pulsing voltage
IC704
Leg 1:-0.68
Leg 2:-0.71
Leg 3:27.33
IC706
Leg 1:-25.36
Leg 2:-25.36
Leg 3:0.00
Ok I think I have figured out what IC705 and IC704 are .
IC704 is a LM317
IC705 is a LM337
IC706 is the issue not sure what goes in that location since no matter if I put a 337 or a 317 the 3rd leg has no voltage at all
IC704 is a LM317
IC705 is a LM337
IC706 is the issue not sure what goes in that location since no matter if I put a 337 or a 317 the 3rd leg has no voltage at all
Ok I’m gonna hold off on this amp until morning when the parts arrive for it .
I’m putting in the original diodes that were defective from the beginning and I replaced with a different part number .
Once install I should be able to figure this out hopefully
I’m putting in the original diodes that were defective from the beginning and I replaced with a different part number .
Once install I should be able to figure this out hopefully
IC706
Leg 1 is fed off the middle pin of the negative rectifier
Leg 2 goes to a pin 8 ( vb2)on the driver ic IRS2093M
Leg 3 goes to the source leg of half of the outputs
Any ideas what goes on location IC706?
Leg 1 is fed off the middle pin of the negative rectifier
Leg 2 goes to a pin 8 ( vb2)on the driver ic IRS2093M
Leg 3 goes to the source leg of half of the outputs
Any ideas what goes on location IC706?
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Are those direct connections (0 ohms) or do they go through resistors?
Leg 3? High-side or low-side FETs?
leg 2 makes sense but not the others if they are 0 ohm connections.
Leg 3? High-side or low-side FETs?
leg 2 makes sense but not the others if they are 0 ohm connections.
Leg 1 goes to 1 side of a 2k resistor then to the middle leg of the negative rectifier.
Leg 2 goes to a 240 ohm resistor then to pin 8 of the IC
Leg 3 goes to a smd cap then to the source leg of the of the outputs . The middle leg of that output is connected to the output filter inductor
Leg 2 goes to a 240 ohm resistor then to pin 8 of the IC
Leg 3 goes to a smd cap then to the source leg of the of the outputs . The middle leg of that output is connected to the output filter inductor
I can't understand the circuit from the information you posted. Maybe someone else who has worked on one of these can. Try getting the diagram from Rockford.
Ok I think o figured this out now .
IC705 is a LM337 which controls the -15 volts on pin 4 of the opamp .
IC704 is a LM317 which controls the + 15 volts for the power led
IC706 is a LM317 which controls the +15 volts on pin 8 of the opamps
Now I have a new problem . The led is supposed to be blue when the amp is powered up and playing audio . The light remains red even tho the amp is producing rail and regulated voltages .
IC705 is a LM337 which controls the -15 volts on pin 4 of the opamp .
IC704 is a LM317 which controls the + 15 volts for the power led
IC706 is a LM317 which controls the +15 volts on pin 8 of the opamps
Now I have a new problem . The led is supposed to be blue when the amp is powered up and playing audio . The light remains red even tho the amp is producing rail and regulated voltages .
I get no drive on the outputs .
Is there a way I can test for drive at the driver ic or how do I test for drive in this amp ?
Is there a way I can test for drive at the driver ic or how do I test for drive in this amp ?