Troubleshooting Flowcharts; Power Can Not Be Turned On - Toshiba RAS-10SA-E Service Manual

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.?
NO
Does the fuse
(F01) blow?
Does the thermal
fuse blow?
(Under PF. Terminal)
Is the indication voltage
NO
(DC12V or 5V) of main
PC board correct?
Is the voltage
NO
across C02 measured
DC310V~340V?
YES
Is the secondary
voltage of SW trans-
NO
former (T01) measured
DC35V, DC12V,
and DC7V ?
YES
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.
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION
lamp flash?
YES
Does the power turn
on by pushing the
[START/STOP] button
of the remote control?
YES
Parts (R21, R109, SG01,
YES
C15, C01, DB01, C02,
IC01, T01) are defective.
NO
Wrong wiring of
YES
AC cord or connecting
cable is defective.
NO
YES
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 .
Does the transmission
NO
indicator of remote
control flash normally and
transmit certainly?
(No problem)
Is the secondary
voltage of SW
NO
transformer measured
DC35V, DC12V,
and DC7V?
YES
– 38 –
NO
YES
PC board
is defective.
SW transformer
(T01) or IC (IC01)
for power supply
is defective.
Operation
Check Items
Main cause
Countermeasure
Symptom
Remote control
is defective.
Replace the
remote control.
Replace the
thermal fuse set.
Check connection.
Replace the main
PC board.
Replace the main
PC board.
Motor is defective.