Troubleshooting Flowcharts - Toshiba RAS-07SKHP-E Service Manual

9-5. Troubleshooting Flowcharts

9-5-1. 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?
NO
Does the thermal
fuse blow?
(Under PF. Terminal)
NO
Is the indication voltage
NO
(DC12V or 5V) of main
P.C. board correct?
YES
Is the voltage
NO
across C63 measured "Pre-check", or defective circuit
before power P.C. board block.
DC310V ~ 340V?
YES
Shut off the power
Is the voltage
supply once, and turn
NO
across C66
measured DC12V?
disconnecting the motor
connector CN10*.
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 blink?
YES
Does the power turn on
NO
by pushing the [
] button
of the
remote control?
YES
Parts (R21, R22, SG01,
YES
C01, C02, DB01, C63
M01) are defective.
Wrong wiring of
YES
AC cord or connecting
cable is defective.
Does the CN14
connector the wrong
connecting?
Refer to the paragraph
Is the voltage
across C66
it on again after
measured
DC12V?
Does the transmission
indicator of remote
control flash normally
and transmit certainly?
YES
(No problem)
NO
P.C. board is
defective.
YES
NO
YES
- 49-
FILE NO. SVM-07023
Operation
Check Items
Main cause
Countermeasure
Symptom
NO
Remote control is
defective.
Replace the remote
control.
Replace the
thermal fuse set.
Check connection.
Replace the main
P.C. board.
Re-wiring the cable.
Replace Fan motor
and P.C. board.
Replace P.C. board.