Post by a1tvtech on May 11, 2016 16:57:50 GMT -5
Hello! I am an experienced technician with a TV & Radio Technician License and FCC GROL... but I need help on this one!
I have a Pioneer Elite Receiver VSX-09TX that originally was blowing the 10 Amp mains fuse... I found that Q45 & Q55 (Surround Right Outputs) were both shorted. I replaced them and now it Powers on then displays "Power Off" a few seconds later.
I have checked the speaker wire outputs on the amp board for DC Voltage with the following results: FL @ (0v), FR @ (-6.5v), C @ (0v), SL @ (0v), SR @ (-25v)
Also checked IC1501 & IC1502 both are good.
I do have proper test equipment such as an SC61 Oscilloscope, PR57 Variable Isolation Transformer, Transistor Checker, ESR Meter and Digital Voltmeter.
Any help would be greatly appreciated!
Tim
I have a Pioneer Elite Receiver VSX-09TX that originally was blowing the 10 Amp mains fuse... I found that Q45 & Q55 (Surround Right Outputs) were both shorted. I replaced them and now it Powers on then displays "Power Off" a few seconds later.
I have checked the speaker wire outputs on the amp board for DC Voltage with the following results: FL @ (0v), FR @ (-6.5v), C @ (0v), SL @ (0v), SR @ (-25v)
Also checked IC1501 & IC1502 both are good.
I do have proper test equipment such as an SC61 Oscilloscope, PR57 Variable Isolation Transformer, Transistor Checker, ESR Meter and Digital Voltmeter.
Any help would be greatly appreciated!
Tim
