Panasonic MC-E761 - Manual (Page 17)

17
TROUBLE SHOOTING GUIDE
CONDITION CHECKPOINT METHOD OF INSPECTION CAUSE / REMEDY
Motor fails to rotate. Power cord Check power cord continuity between If there is no continuity,
(no noise is heard connection. plug pins and contact base. replace the power cord.
at all).
Motor continuity. Check motor continuity between carbon If there is no continuity, replace
brush holder tabs. the motor.
Carbon brushes. Check if there is gap between If there is gap between carbon
carbon brush and conmutator. brush and conmutator, replace
both carbon brushes.
ON/OFF Switch. Check continuity across switch If there is no continuity, replace
connections. ON/OFF switch.
Thermal cut-out. Check continuity across If there is no continuity,
thermal cut-out tabs. replace thermal cut-out.
Triac. Check if the triac is in open circuit. If it is in open circuit, replace it.
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.
Sliding potentiometer. Check if the potentiometer is in If it is in open circuit, replace it.
open circuit or if the lead wires If the lead wire connections
connection are not correct. are not correct, repair them.
Motor runs but there Hose or Suction inlet. Check if there is any blockage If there is any blockage,
is no suction. in the hose or suction inlet. remove it.
Dust bag / Central filter. Check if dust bag is full or dust If the paper bag is full, replace it.
accumulated in central filter. If the central filter is dirt,
clean or replace it.
Noise or vibration. Motor fan Check dust accumulated in motor fan If there is dust accumulated in
(it could happen if the vacuum cleaner motor fan, replace the motor and
has been used with a broken dust bag check filter condition. (never try to
or without central filter). dismantle the motor fan).
Motor does Sliding potentiometer. Check if the potentiometer is If it is short-circuited, replace it.
not change power. short-circuited
(Runs always
at full speed) Power control circuit Check if the power control circuit is If it is short-circuited, replace it.
short-circuited.
Motor runs Sliding potentiometer Check possible bad contact of the If there is bad contact,
irregularly. sliding potentiometer tabs. replace the sliding potentiometer.