Trouble Shooting Guide - Panasonic MC-E8031 Service Manual

MC-E8031 / MC-E8031K / MC-E8033 / MC-E8033K

8 TROUBLE SHOOTING GUIDE

CONDITION
Motor fails to rotate
(no noise is heard at all)
Motor runs but there is no suction Hose or Suction inlet
Noise or vibration
Motor does not change power
(runs always at full speed)
Motor runs irregularly
CHECKPOINT
Power supply cord
Fuse
(Plug for UK only)
Fuse of P.C.B. Ass'y
(250V, 12 A)
Motor continuity
Check the motor performance. Apply a voltage directly to both
ON/OFF Switch
Triac (Inside of P.C.B.)
P.C.B. Ass'y
Dust compartment / Filters
Motor fan
Control Axis
P.C.B. Ass'y
control Axis
METHOD OF INSPECTION
Check power supply cord
continuity.
Check plug fuse continuity.
Check fuse continuity.
Check motor continuity between
carbon brush holder tabs.
sides of the motor terminal to see if
the motor performs as specified.
Check continuity across switch
connections
Check if the triac is in open circuit. If it is in open circuit, replace
Check the internal parts for
anything unusual. (burn-out, melt-
down, etc.)
Check if there is any blockage in
the hose or suction inlet.
Check if dust compartment is full
or there is dust accumulated in the
filters.
Check dust accumulated in motor
fan (it could happen if the vacuum
cleaner has been used without
central filter).
Check if the potentiometer is
short-circuited.
Check if power control circuit is
short-circuited.
Check possible bad contact of
P.C.B. Ass'y.
12
CAUSE / REMEDY
If there is no continuity, replace
the cord reel unit.
If there is no continuity, replace
the cord reel unit.
If there is no continuity, replace
P.C.B. Ass'y.
If there is no continuity, replace
the carbon brush or motor.
If the motor fails to perform,
replace it with new one.
If there is no continuity, replace
Switch or P.C.B. Ass'y.
P.C.B.Ass'y.
If anything is found unusual,
replace the P.C.B. assembly with
new one.
If there is any blockage, remove it.
If dust compartment is full, empty
it.If the filters are dirt of dust,
clean them out or replace.
If there is dust accumulated in the
motor fan, replace the motor and
check filter condition. (never try to
dismantle the motor fan)
If it is short-circuited, replace
power control circuit.
If it is short-circuited, replace it.
If there is bad contact, replace
P.C.B. Ass'y.