Question about Onkyo TX-SV525 Receiver
I have traced the amplifier circuit and found one shorted final transistor with a burned resistor associated with the transistor.The bad transistor was the left rear channel.I replaced both rear channel transistors with a new matched set and the burned resistor.I found no other problems in the circuit.I powered it up and the display reads PROTECT,with no output.I have a service manual,but I can find nothing about the protection circuit....
HOWDY, NOW YOU COULD TRY THIS ONE: POWER THE RECEIVER UP , THEN PUSH&HOLD !THE VIDEO 1 BUTTON, THEN TURN THE PIECE IN THE OFF (STANDBY MODE ) ,IT WILL SAY "CLEAR SO IT SHOULD BE BACK TO IT,S ORIGINAL FACTORY SPECIFICATION,S. SUCCES ! AMSTERDAMCOWBOY-HOLLAND-NOW FLORIDA! 4-EVER
HOWDY, NOW YOU COULD TRY THIS ONE: POWER THE RECEIVER UP , THEN PUSH&HOLD !THE VIDEO 1 BUTTON, THEN TURN THE PIECE IN THE OFF (STANDBY MODE ) ,IT WILL SAY "CLEAR SO IT SHOULD BE BACK TO IT,S ORIGINAL FACTORY SPECIFICATION,S.
SUCCES ! AMSTERDAMCOWBOY-HOLLAND-NOW FLORIDA! 4-EVER
Posted on Oct 23, 2007
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Posted on Jan 02, 2017
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Look under the wide ribbon cable going to the front panel. There is a cluster of components on the main board that make 12V and 6V power for different things. There is a pair of 12 ohm and a 1 ohm resistor. These run very hot and over time will take out the motherboard underneath. If these resistors disconnect the unit will cycle on and off rapidly. I found this out when I was replacing the resistors and repairing the circuit board.
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