Toshiba AW-9500SBJ/SBK/SBX, Service Manual

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(3) Electrical part failure diagnosis (check with inspection mode)
No. PART Failure diagnosis method
1 Motor
Water intake valve
Drain valve motor
2 Drain valve motor
(Wind signal)
3 Revolution sensor
4 Water level sensor
5 Lid switch
Inspection mode
1
~
5
*: It should be each rated voltage.
:
:
:
:
Check voltage at locations to be
tested under standby status.
Do they show 220 V*?
Yes
With machine operated, check voltages at
locations to be tested.
Do they change from AC 220 V*
→
0 V?
Change
No
Associated electrical parts may be
failure, or lead unit connector
disconnected or breakdown.
No change
Program timer failure
Inner lock of motor and drain valve
etc. or lock of drive assembly.
Inspection mode
6
*: It should be each rated voltage.
:
:
:
:
Check voltage accross CN1 black
and CN3 red under standby status.
Does it show AC 220 V*?
Yes
Check above voltage after wind-up
completion.
Does it change from AC 220 V* to 0 V?
Change
No
Drain valve motor internal lead
breakdown, or lead unit connector
disconnected, or leads breakdown.
No change
Drain valve motor failure
Program timer failure
Inspection mode
7
Inspection mode
8
:
:
:
:
:
Do all water level indicators turn off
with no water filled on tub?
All turn off
Does water level indicator show a level
with water filled on the tub?
(For water level indication and water
level, refer to below)
Indication is apt to low
Either one of them
turns on
Is 3P connectors of
water level sensor
disconnected?
Disconnected
Connect
Indication is
apt to high
Water level sensor
part failure or program
timer failure.
Connected
No abnormality
Check air tube disengaged, broken
down, folded, foreign matter
clogged, water inversion onto air
trap, etc.
:
:
Inspection mode
9
:
:
:
Yes
No
Program timer failure
:
Check voltage across CN6 pink
and CN6 light green.
Does it show DC 5 V?
Rotates pulsator with hand and check voltage
across CN1 black and CN4 light green.
Does it change from DC 5 V
← →
0 V or vice versa?
Change
No change
Sensor case assembly or lead unit
connector disconnected, lead
breakdown.
:
:
:
Yes
No
Program timer failure
:
No change
Change
Check voltage across CN6 pink
and CN6 blue.
Does it show DC 5 V?
Does voltage across CN6 pink and CN6 blue change
from DC 5 V to 0 V when the lid is opened or closed?
Lid switch, or lead unit connector
disconnected, breakdown.
Water level indication vs. water level
Water level height
Water level
220 V
51 L approx. 353 mm
41 L approx. 298 mm
32 L approx. 228 mm
19 L approx. 138 mm
10 L approx. 73 mm