Yes. In the future, order the TL594 to keep in stock. The LM293 has a wider temperature range but I've never had any problem using the 393.
These rarely fail. Are you replacing them for a good reason?
These rarely fail. Are you replacing them for a good reason?
On this drawing pin 3 is REM and pin 4 is Remote. What tis the difference in this instance?
Pin 4 is energized on the main board with remote voltage applied with the driver board out of circuit, pin 3 is not. Should pin 3 have voltage also, or would this be voltage controlled by the driver board?
Pin 4 is energized on the main board with remote voltage applied with the driver board out of circuit, pin 3 is not. Should pin 3 have voltage also, or would this be voltage controlled by the driver board?
Is terminal 1 or 7 of the 393 going high? Which one?
If 7, check the equivalent of Q226 on the diagram.
If 7, check the equivalent of Q226 on the diagram.
I had it backwards, pin 1 high, check Q226.
494-1 is being driven high by the 393. 494-15 is high because it's tied directly to the 5v regulator.
Did you find Q226.
Does your board closely match the diagram I posted?
494-1 is being driven high by the 393. 494-15 is high because it's tied directly to the 5v regulator.
Did you find Q226.
Does your board closely match the diagram I posted?
What is the DC voltage across the B+ and ground terminals of the amplifier?
Post the DC voltage on all terminals of the 393. Copy and paste:
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Post the DC voltage on all terminals of the 393. Copy and paste:
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
B+ to Gnd: 11.5
Pin 1: 6.04
Pin 2: 2.4
Pin 3: 8.00
Pin 4: .003
Pin 5: 1.02
Pin 6: 2.87
Pin 7: .113
Pin 8: 11.46
Pin 1: 6.04
Pin 2: 2.4
Pin 3: 8.00
Pin 4: .003
Pin 5: 1.02
Pin 6: 2.87
Pin 7: .113
Pin 8: 11.46
Is this amp using the 11 pin audio driver board? If not, post a photo of the board.
Is D11 on the PS driver board shorted?
Is D11 on the PS driver board shorted?
Is this amp using the 11 pin audio driver board? Yes
Is D11 on the PS driver board shorted? It is labled D34 on this PS driver board but it checks ok in circuit.
Is D11 on the PS driver board shorted? It is labled D34 on this PS driver board but it checks ok in circuit.
Is Q226 still out of the circuit?
Are the solder pads for it cleaned up (no shorts between pads)?
Are the solder pads for it cleaned up (no shorts between pads)?