Read Panasonic MC-E7305 / MC-E7303 / MC-E7301 Service Manual online
4 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
Check power cord continuity.
If there is no continuity, replace the
power cord.
power cord.
Fuse (Plug for UK only)
Check plug fuse continuity.
If there is no continuity, replace the
fuse.
fuse.
Main fuse
Check main fuse continuity.
If there is no continuity, replace the
main fuse.
main fuse.
Motor continuity
Check
motor
continuity
between
carbon brush holder tabs.
If there is no continuity, replace the
motor.
motor.
ON/OFF Switch
Check continuity across ON/OFF
switch tabs.
switch tabs.
If there is no continuity, replace the
switch.
switch.
Thermal cut-out
Check continuity across thermal cut-
out connection points. (Assembled in
motor)
out connection points. (Assembled in
motor)
If there is no continuity, replace the
motor.
motor.
Triac
Check if the triac is in open circuit.
(Assembled in PCB)
(Assembled in PCB)
If it is in open circuit, replace P.C.B.
ass’y.
ass’y.
Power board
Check if the diac is in open circuit.
If it is in open circuit, replace P.C.B.
ass’y.
ass’y.
* Rotary potentiometer
Check if the potentiometer is in open
circuit.
circuit.
If it is in open circuit, replace power
control.
control.
Motor runs but there is no
suction.
suction.
Hose or Suction inlet, Tubes
and nozzle
and nozzle
Check for any possible blockage in the
indicated parts .
indicated parts .
If there is any blockage, remove it.
Dust bag / Central filter
Check if dust bag is full or central filter
is choked up.
is choked up.
If dust bag is full, replace with a new
one. If central filter is choked up,
remove and clean it out or replace.
one. If central filter is choked up,
remove and clean it out or replace.
Noise or vibration
Motor fan
Check dust accumulated in motor fan. If there is dust accumulated in the
motor fan, replace the motor and check
filter condition (never try to dismantle
the motor fan)
filter condition (never try to dismantle
the motor fan)
Motor does not change power
(runs always at full speed)
(runs always at full speed)
* Rotary potentiometer
Check possible bad contact of power
control potentiometer.
control potentiometer.
If there is bad contact, replace the
power control.
power control.
* Power board
Check if power board circuit is short-
circuited.
circuited.
If it is short-circuited, replace P.C.B.
ass’y.
ass’y.
Motor runs irregularly
* Rotary potentiometer
Check possible bad contact of power
control potentiometer.
control potentiometer.
If there is bad contact, replace power
control.
control.
NOTE: Parts marked with (*) only affect to model with power control.
7
MC-E7305 / MC-E7303 / MC-E7301
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