TROUBLE SHOOTING
1.1. Power Supply Connection Abnormalities
Does the POWER indicator blink in red immediately or after a fixed
period when the power supply is connected to the AC power inlet?
When the POWER button is pressed on the unit or the remote control, does the unit start with the
OLED not lit?
If pressing the "
OPEN/CLOSE
" button operates the tray, there may be a malfunction in the OLED or
display board.
Is the FUSE [
F901
] blown out?
Can the device be started up and can
Protection History
from "
Protection History Display Mode
" be checked?
Check the protection type.
See "
1-3. Protection History Display Mode
"
If the fuse [
F901
] breaks again after it has been replaced, there may be a short or overload in the power
supply.
1.3. Power Supply Voltage Abnormalities
".
YES
YES
NO
NO
NO
NO
YES
YES
1.2. Power Supply Detection Circuit Abnormalities
Are any of the connectors between SMPS PCB and the circuit boards defective or disconnected?
SMPS[
CN91
]-DAMP[
BN91
] , SMPS[
BN92
]-NETWORK[
CN92
] , SMPS[
BN93
]-MAIN[
CN93
]
Check if the connectors are connected as indicated in the wiring diagram and adjust the connections if
necessary.
If this does not re-establish contact in the wiring, replace the Wire Assy unit or the circuit board which
the wires are mounted on.
NO
YES
1. The unit does not power on
Are any of the connectors between AC INLET PCB and SMPS PCB defective or disconnected?
[
CN90
], [
BN90
]
Check if the connectors are connected as indicated in the wiring diagram and adjust the connections
if necessary. If this does not re-establish contact in the wiring, replace the Wire Assy unit or the circuit
board which the wires are mounted on.
YES
NO
Is there an abnormality in the power supply detection circuit?
[
D913, R974, 975, 976, 904, 969, 959, PC94, Q931
]
If there is a 50Hz or 60Hz signal in [
BN93
], the circuit is operating normally.
NO
There is an abnormality in the SMPS power supply detection circuit.
Replace any defective parts or the SMPS PCB.
YES
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
47
