Service manual

-51-
TROUBLE DIAGNOSIS
Fig. 6 Trouble Diagnosis Flow when LOW VOLTAGE “SHUT DOWN” occurs
YES
YES
NO
NO
YES
NO
Unplug Connectors connecting High
Voltage and POWER PCB(CN806)
AC PWR "ON" =>
PWR "ON" with Remote Controller
"SHUT DOWN"
occur?
AC PWR "OFF" =>
AC PWR "ON" =>
PWR "ON" with Remote Controller
AC PWR "ON" =>
PWR "ON" with Remote Controller
Unplug Connectors connecting High
Voltage and DIGITAL PCB(CN601)
Unplug Connectors connecting High
Voltage and DATA PCB(CN7)
AC PWR "OFF"
"SHUT DOWN"
occur?
Replace High
Voltage Or
SCAN PCB
"SHUT DOWN"
occur?
Replace DIGITAL
Or DATA PCB
Replace MAIN
PCB
Replace SUB
PCB
Unplug Connectors connecting SUB
and POWER PCB(CN801)
Unplug Connectors connecting High
Voltage and POWER PCB(CN805)
Unplug Connectors connecting SUB
and MAIN PCB(JP117)
Turn AC PWR OFF
Set VOLTAGE SWITCH of POWER
PCB to LOW (Picture 6-2)