TROUBLE SHOOTING
1. POWER
1.1. The unit does not power on
TO "
1.2. Power Connection Wiring Abnormali-
".
Check that the LED is lit (when connected to the
AC inlet).
Does the POWER indicator blink in red immedi-
ately or after a fixed period of time?
Is the FUSE blown out?
MAIN FUSE[
F801
]
Can the "
Protection History
" be checked?
1-3. Protection History Display Mode
Check the Protection history.
[DC PROTECTION1]
Check the POWER PCB.
[DC PROTECTION2]
Check the AUDIO PCB.
Replace the FUSE [
F801
].
If the fuse blows again, proceed to "
".
(The problem may be a short circuit or overload.)
Is the OLED lit?
"
1.2. Power Connection Wiring Abnormalities
YES
YES
NO
YES
NO
NO
YES
1.2. Power Connection Wiring Abnormalities
"
1.3. Power Supply Voltage Abnormalities
"
Check the cable and its connection.
POWER PCB to MAIN PCB [
CN3000, CN3003
]
MAIN PCB to SMPS PCB [
CN441
]
POWER PCB to AUDIO PCB [
CN2000
]
If conduction does not recover, replace the
cable or circuit board.
OK
NG
"
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
42