Panasonic MC-CG462-RR79 / MC-CG462RR79 Service Manual ▷ View online
5
3 Troubleshooting 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 supply cord
Check power supply cord continu-
ity.
ity.
If there is no continuity, replace the
cord reel patition unit.
cord reel patition unit.
Fuse
(250V, 12A)
(250V, 12A)
Check fuse continuity.
If there is no continuity, replace Rail
Base unit.
Base unit.
Motor continuity
Check the conduction between the
terminals of the motor.
terminals of the motor.
If there is no continuity, replace the
motor.
motor.
ON/OFF
Switch
Check continuity across switch
connections
connections
At switch ON, if there is no continu-
ity, replace P.C.B.Unit.
ity, replace P.C.B.Unit.
P.C.B.Unit
Check the internal parts for any-
thing unusual. (burn-out, melt-
down, etc.)
thing unusual. (burn-out, melt-
down, etc.)
If anything is found unusual,
replace the P.C.B.Unit with new
one.
replace the P.C.B.Unit with new
one.
Motor runs but there is no suction Hose or Suction inlet
Check if there is any blockage in
the hose or suction inlet.
the hose or suction inlet.
If there is any blockage, remove it.
Dust bag / Secondary filter
Check if dust bag is full or Second-
ary filter is choked up.
ary filter is choked up.
If dust bag is foll, replace with a
new one. If Secondary filter is
choked up, remove and clean it out
or replace.
new one. If Secondary filter is
choked up, remove and clean it out
or replace.
Noise or vibration
Motor fan
Check dust accumulated in motor
fan (it could happen if the vacuum
cleaner has been used without cen-
tral filter).
fan (it could happen if the vacuum
cleaner has been used without cen-
tral filter).
If there is dust accumulated in the
motor fan, replace the motor and
check filter condition. (never try to
dismantle the motor fan)
motor fan, replace the motor and
check filter condition. (never try to
dismantle the motor fan)
Motor does not change power
(runs always at full speed)
(runs always at full speed)
Power control
Adjust the power control and check
whether or not the resistance var-
ies.
whether or not the resistance var-
ies.
If the resistance does not vary, then
replace the P.C.B.Unit.
replace the P.C.B.Unit.
P.C.B.Unit
Examine the triac in the P.C.B.Unit
and check whether or not T1 and
T2 are short-circuited.
and check whether or not T1 and
T2 are short-circuited.
If they are short-circuited, then
replace the P.C.B.Unit.
replace the P.C.B.Unit.
Motor runs irregularly
P.C.B.Unit
Check possible bad contact of
P.C.B.Unit
P.C.B.Unit
Replace P.C.B.Unit.
6
4 Disassembly and Assembly Instructions
Important notice: Before replacing any components, make sure to turn OFF the vacuum cleaner.
Remove the power plug from the outlet.
* Caution:
1. Do not attempt to modify the machine, parts, etc. when marking repairs.
2. Even if a wire is partially disconnected, do not attempt to repair and/or connect it when a wired unit is available as
service parts. Replace the overall section with a new wired unit.
3. Pull out and/or insert the fastening terminal without twisting it.
4.1.
Dust box cover assembly
removal
removal
1. Open the dust box cover assembly at an angle of approx.
45
°. Insert a flat-blade screwdriver between the upper
body and the dust box cover assembly and move it in the
direction of the arrow mark to remove the dust box cover
assembly from its right side.
direction of the arrow mark to remove the dust box cover
assembly from its right side.
4.2.
Separate the upper and lower
body units
body units
1. Remove the five screws fixing the upper body U and
lower body U.
2. Remove the screw fixing the upper body U from the rear
side.
7
3. Lift the upper body U to separate it from the lower body U.
4.3.
Printed circuit board AU
removal
removal
1. Remove the Control knob U and switch cover U.
2. Disengage the fast-on terminal of the lead wire (red) lead-
ing to the fuse and that of the lead wire (blue) leading to
the cord reel connected to the printed circuit board.
* Caution:
the cord reel connected to the printed circuit board.
* Caution:
Pull out the fastening terminal without twisting it.
Pull out by holding down the section indicated by an
arrow.
3. Remove the printed circuit board AU (with control).
* For removing the printed circuit board AU , first
remove the fast-on terminal for the connecting sec-
tion for the motor.
8
4.4.
Motor removal
1. Remove the dust box lid assembly. (Refer to paragraph
4.1 on P.6)
2. Remove the upper body from the lower body. (Refer to
paragraph 4.2 on P.6)
3. Remove the printed circuit board AU. (Refer to paragraph
4.3 on P.7)
4. Remove the two screws fixing the printed circuit board
holder and pull it out from the lower body.
5. Lift the motor set section from the lower body U.
6. Remove all components fitted to the motor.
a. Remove the motor support rubber (front).
b. Remove the motor support rubber (rear).
b. Remove the motor support rubber (rear).
c. Remove the motor support.
d. Remove the noise suppressor U.
e. Remove all lead wires.
e. Remove all lead wires.
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