Read Panasonic MC-E601 / MC-E603 Service Manual online
8 TROUBLE SHOOTING GUIDE
CONDITION
CHECKPOINT
METHOD OF INSPECTION
CAUSE / REMEDY
Motor fails to rotate.
(no noise is heard at
all).
(no noise is heard at
all).
Power cord connection
Check power cord continuity between
plug pins and contact base.
plug pins and contact base.
If there is no continuity, replace the power cord.
Motor continuity
Check
motor
continuity
between
carbon brush holder tabs.
If there is no continuity, replace the motor.
Carbon brushes
Check if there is gap between carbon
brush and conmutator.
brush and conmutator.
If
there
is
gap
between
carbon
brush
and
conmutator, replace both carbon brushes.
ON/OFF Switch
Check
continuity
across
switch
connections.
If there is no continuity, replace power control circuit.
Thermal cut-out
Check continuity across thermal cut-
out tabs.
out tabs.
If there is no continuity, replace thermal cut-out.
Triac
Check if the triac is in open circuit.
If it is in open circuit, replace power control circuit.
Power control circuit
Check if the diac is in open circuit.
If it is in open circuit, replace power control circuit.
Rotating potentiometer (VR2) Check if the potentiometer is in open
circuit.
If it is in open circuit, replace power control circuit.
Trimmer potentiometer (VR1) Place the rotating potentiometer at min.
power and check if the potentiometer
(VR1) is adjusted at 450W.
(VR1) is adjusted at 450W.
If it is adjusted at 450W and the motor doesn‘t work,
replace power control circuit.
replace power control circuit.
Motor runs but does
not suction.
not suction.
Hose or Suction inlet
Check if there is any blockage in the
hose or suction inlet.
hose or suction inlet.
If there is any blockage, remove it.
Dust bag / Central filter
Check if dust bag is full or dust
accumulated in central filter.
accumulated in central filter.
If the paper bag is full, replace it. If the central filter is
dirty, clean or replace it.
dirty, clean or replace it.
Noise or vibration.
Motor fan
Check dust accumulated in motor fan
(it could happen if the vacuum cleaner
has been used with a broken bag or
without central filter).
(it could happen if the vacuum cleaner
has been used with a broken bag or
without central filter).
If there is dust accumulated in motor fan, replace
the motor and check filter condition. (never try to
dismantle the motor fan).
the motor and check filter condition. (never try to
dismantle the motor fan).
Motor does not
change power.
(Runs always at full
speed).
change power.
(Runs always at full
speed).
Rotating potentiometer
Check if the potentiometer is short-
circuited.
circuited.
If it is short-circuited, power control circuit.
Power control circuit
Check if the power control circuit is
short-circuited.
short-circuited.
If it is short-circuited, replace it.
Motor runs
irregularly.
irregularly.
Rotating potentiometer
Check possible bad contact of the
rotating potentiometer PCB tracks.
rotating potentiometer PCB tracks.
If there is bad contact, replace power control circuit.
14
MC-E601 / MC-E603
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