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9-3. Troubleshooting Flowcharts
9-3-1. Power can not be Turned on (No Operation at All)
<Preliminary checks>
(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK.?
*
Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of
damage of the motor.
PC board 
is defective.
Symptom
Operation
Check Items
Main cause
Countermeasure
Shut off the power supply 
from AC outlet once and 
turn it on after 5 seconds.
Does the OPERATION 
lamp flash?
Does the transmission 
indicator of remote 
control flash normally and 
transmit certainly?
Remote control 
is defective.
Replace the 
remote control.
(No problem)
Does the fuse 
(F01) blow?
Replace the main 
PC board.
Wrong wiring of 
AC cord or connecting 
cable is defective.
Replace the 
thermal fuse set. 
Check connection.
Is the indication voltage 
(DC12V or 5V) of main 
PC board correct?
Is the voltage 
across C02 measured 
DC310V~340V?
Refer to the paragraph 
"Pre-check", or defective circuit 
before power PC board block.
Shut off the power 
supply once, and turn 
it on again after dis-
connecting the motor 
connector CN10
*
.
Is the secondary 
voltage of SW 
transformer measured 
DC35V, DC12V, 
and DC7V?
Motor is defective.
Is the secondary 
voltage of SW trans-
former (T01) measured 
DC35V, DC12V,
 and DC7V ?
YES
SW transformer 
(T01) or IC (IC01) 
for power supply
is defective.
Parts (R21, R109, SG01, 
C15, C01, DB01, C02, 
IC01, T01) are defective.
Does the power turn 
on by pushing the 
[START/STOP] button 
of  the remote control?
NO
YES
YES
NO
NO
YES
YES
NO
NO
NO
YES
YES
NO
YES
YES
NO
Does the thermal 
fuse blow?
(Under PF. Terminal)
NO
Replace the main 
PC board.