Panasonic MC-CJ915-R747 Service Manual page 6

CONDITION CHECKPOINT FIGURE
ON/OFF
SWITCH
(in the P.C.B.
Assy)
1. The Motor TRIAC (on the
doesn't rotate. P.C.B. Assy)
2. The Power
Control doesn't
function.
POWER CON-
TROL VOL-
UME (in the
P.C.B. Assy)
The Cord cannot CORD REEL
be pulled out. UNIT
MOTOR CASE
UNIT
1. The Cord can-
not be rewound.
2. The pulled out
Cord cannot be
locked.
1. The suction DUST BAG
power is low. FILTER
2. The Motor EXTENSION
stops during WAND UNIT
vacuuming. HOSE C UNIT
(The Thermo
Protector in the
Fan Motor Unit
works.)
CHECK METHOD
• Check the continuity by press-
ing the On/Off Switch.
• Check that the Triac has not
been short-circuited.
If there is continuity between
T1 and T2, then there is a
problem in the components.
• The resistance between A and
B must be switchable.
Ω
0~470
• If the Cord cannot be pulled
out, press the Brake Lever and
confirm that the Cord can be
rewound.
Repeat operations to rewind
and pull out the Cord two or
three times and confirm that it
can be normally rewound.
Separate the Body and;
• Confirm that a sufficient num-
ber of spare turns have been
made.
• Confirm that the Cord Reel
Spring is working.
• Confirm that the Brake Lever
Unit is working correctly to stop
the Cord from rewinding.
Check for clogging with dust.
• Dust Bag
• Filter (in the Dust Box)
• Hose C Unit
• Extension Wand Unit
6
REMEDY
• If there is a problem, replace
the P.C.B. Assy.
• If there is a problem, replace
the P.C.B. Assy.
• If there is a problem, replace
the P.C.B. Assy.
• If it is impossible to resolve the
problem due to an abnormal
condition of the Cord, separate
the Body, untwist the Cord, and
rewind it. Or, replace the Cord
Reel Unit and rewind the Cord.
• Make spare turns according to
the engraved number of turns,
or;
Replace the Cord Reel Unit.
Replace the Motor Case Unit.
Remove dust.
• Replace any broken Dust Bag,
Filter, and/or Hose C Unit.