TROUBLE SHOOTING
Failure of the SMPS PCB.
Broken wire in [D8509 - 8518].
Broken wire in FUSE [F1801].
Broken wire in MAIN TRANS.
Disconnection of MAIN PCB [BN712], malfunction of [IC718] or
disconnection of 7P CARD WIRE inserted in [CN103].
Failure of the DC OFFSET DETECT.
Failure of the OVER HEAT DETECT.
Failure of the OVER CURRENT DETECT.
Failure of the power amplifier circuit.
Check the [CN103 : 1pin P3V3_UCON] of DIGITAL PCB
STANDBY LED flashes on/off every 0.5 seconds.
[IC105] or [IC104] failure of DIGITAL PCB.
Failure of the P_DWN detection.
Malfunction of [U101].
Failure of the power supply circuit.
Check insertion of the connector of the SMPS PCB.
Check insertion of each connector.
Check insertion of the connector of the DIGITAL PCB.
Check conduction of FUSE [F1801]
Check the [CN1800 : 1pin ST+6.8V] of SMPS PCB.
Check the conduction of the MAIN TRANS winding.
Check the conduction of [D8509 - 8518].
1. The power cannot be turned on
(STANDBY LED is not lit(STANDBY MODE))
2. The power cannot be turned on
(STANDBY LED is lit → light flashes)
No voltage
No conduction.
No conduction.
No conduction.
No voltage
With voltage
It conducts.
With voltage
Check the conduction of the MAIN TRANS winding.
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
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