Panasonic MC-E780 User manual

SPECIFICATIONS MC-E780 MC-E781 MC-E783
Power source AC230V AC230V AC230V
AC230-240V AC230-240V AC230-240V Depending on version
50Hz 50Hz 50Hz
Input power (max.) 1500W 1500W 1500W
Vacuum 30 kPa 30 kPa 30 kPa
Power cord length 5 m 5 m 5 m
Radio of operation 7.8 m 7.8 m 7.8 m
Net weight 6.1 kg 6.1 kg 6.1 kg
Dimensions (LxWxH) mm 410x282x255 410x282x255 410x282x255
Attachments:Floor nozzle •• •
Extension tube •• •
Dusting brush •• •
Crevice nozzle •• •
Specifications are subject to change without notice for further improvement.
MODELS MC-E780 / MC-E781 / MC-E783
Ref.: Z32T1000
Matsushita Electric España, S.A.
DIVISION DE ASPIRADORAS
Zona Industrial del Polígono de CELRÀ
17460 CELRÀ(Girona) SPAIN
Vacuum Cleaner

2
TABLE OF CONTENTS PAGE
SPECIFICATIONS ............................................................................... 1
SCHEMATIC DIAGRAM ....................................................................... 2
PICTORIALWIRING DIAGRAM ................................................................. 3
EXPLODED VIEW .............................................................................. 4
SPARE PARTS LIST ........................................................................... 8
REPLACEMENT OF MAIN PARTS ........................................................... 10
TROUBLE SHOOTING GUIDE ............................................................... 18
PACKING INSTRUCTIONS .................................................................... 19
SCHEMATIC DIAGRAM
MC-E780
Black
White
Yellow
Black
POWER
SUPPLY
AC 230-240 V
50 Hz ON/OFF
SWITCH
C5
D4
D5
AC1
D2
C6 R1
N
R3
CN2
T2
T1
G
CN1
DIAC
TRIACJ1
C4
C2
D3
R4
C3
THERMAL CUT-OUT MOTOR
+
M
Black
White
Yellow
Black
POWER
SUPPLY
AC 230-240 V
50 Hz ON/OFF
SWITCH
C5
D4
D5
AC1
D2
C6
VR22
VR21
R6
VR1
VR2
R1
N
R3
CN2
T2
T1
G
CN1
DIAC
TRIAC
C4
C2
D3
R4
C3
THERMAL CUT-OUT MOTOR
+
M
Grey
Blue
MC-E781 / MC-E783

3
PICTORIALWIRING DIAGRAM
MC-E780
MC-E781 / MC-E783
MOTOR
Yellow
Yellow
Black
Black
Black
White
CORD REEL
THERMAL
CUT-OUT
ON/OFF
SWITCH
POWER
CONTROL
CIRCUIT
Carbon brush holder
"S" marked
Carbon brush holder
"P" marked
MOTOR
Yellow
Yellow
Black
Carbon brush holder
"S" marked
Black
Black
White
CORD REEL
THERMAL
CUT-OUT
POTENTIOMETER
ON/OFF
SWITCH
POWER
CONTROL
CIRCUIT
Carbon brush holder
"P" marked
Blue
Grey

4
EXPLODED VIEW
24
25
20
21
39
22
23
42
38
41
44
45
40 37 36
38
19
43

5
EXPLODED VIEW
72
60
58
35
34
27 55
31
56
33
27
26
53
27
67
49
47
52
54
51
59 57
47
32
33
27
28
64
65
68
69
63
62
61
71
46
30
29
48
50
66
70

6
EXPLODED VIEW
6
7
10
8
3
9
2
5
1
4

7
EXPLODED VIEW
13
15
14
16
1717 18
12
11 74
76
79
77
78
75
80
73
InstruccionesdeManejo
Operatinginstructions
Manualdeinstruçoes
MC-E780,MC-E781,MC-E783
Matsushita Electric España,S.A.
DivisindeAspiradoras
ZonaIndustrialdel
PolgonodeCelr -17460CELR¸(Girona)Espaa
GENUINE
TYPE C-20
E
PAPERBAG
For Models:
MC-E7Series
MC-E87Series
MC-E88Series

8
SPARE PARTS LIST
REF. No. DESCRIPTION PART No. Pcs/Set REMARKS
1 HOSE UNIT AMC8A92T1034 1 ••• ✓
2 HOSE AMC8A01K0034 1 ••• ✓
3 HOSE CONNECTING TUBE AMC8A0281034 1 ••• ✓
4 CURVED TUBE UNIT AMC8A94P1034 1 ••• ✓
5 HOSE HOLDER AMC8A1125034 2 ••• ✓
6 ACCESSORY SUPPORT AMC8A73T1034 1 ••• ✓
7 CREVICE NOZZLE AMC8A13P1034 1 ••• ✓
8 DUSTING BRUSH AMC8A97P1034 1 ••• ✓
9 EXTENSION WAND (METALLIC) AMC8A12P1000 2 •• ✓
10 TELESCOPIC WAND AMC8A85P3100 1 •✓
11 FLOOR NOZZLE AMC8A99T1034 1 ••• ✓
12 FLOOR NOZZLE COVER AMC8A90T1034 1 ••• ✓
13 FLOOR NOZZLE BRUSH AMC8A89D1000 1 ••• ✓
14 FLOOR NOZZLE BASE PLATE AMC8A39D1000 1 ••• ✓
15 FLOOR NOZZLE SPRING AMC8A36D1000 2 ••• ✓
16 FLOOR NOZZLE LINEN RETAKE AMC8A41D1000 2 ••• ✓
17 FLOOR NOZZLE SCREW XTN35+25BFY 2 ••• ✓
18 FLOOR NOZZLE SCREW XTN35+14BFY 2 ••• ✓
19 DUST COVER (GREEN COLOUR) AMC8T01T00E1 1 •✓
DUST COVER (BLUE COLOUR) AMC8T01T00Z4 1 •✓
DUST COVER (YELLOW COLOUR) AMC8T01T1093 1 •✓
DUST COVER (GREEN COLOUR) AMC8T01T10E1 1 •✓
DUST COVER (BLUE COLOUR) AMC8T01T10Z4 1 •✓
DUST COVER (BLACK COLOUR) AMC8T01T3061 1 •✓
20 DUST INDICATOR AMC8I99T1000 1 ••• ✓
21 VALVE AMC8I07A1000 1 ••• ✓
22 VALVE SPRING AMC8I09T1000 1 ••• ✓
23 VALVE SUPPORT AMC8I22E1061 1 ••• ✓
24 INDICATOR COVER AMC8I17T1039 1 ••• ✓
25 TAPPING SCREW XTN4+18B 1 ••• ✓
26 UPPER BODY (GREEN COLOUR) AMC8C01T00E1 1 •✓
UPPER BODY (BLUE COLOUR) AMC8C01T00Z4 1 •✓
UPPER BODY (YELLOW COLOUR) AMC8C01T1093 1 •✓
UPPER BODY (GREEN COLOUR) AMC8C01T10E1 1 •✓
UPPER BODY (BLUE COLOUR) AMC8C01T10Z4 1 •✓
UPPER BODY (BLACK COLOUR) AMC8C01T1061 1 •✓
27 TAPPING SCREW XTN4+18B 5 ••• ✓
28 POTENTIOMETER BUTTON (ORANGE COLOUR) AMC8E17T10B0 1 •✓
POTENTIOMETER BUTTON (GREY COLOUR) AMC8E17T1039 1 •• ✓
29 BRAKE LEVER UNIT AMC8P96T1000 1 ••• ✓
30 BRAKE SPRING AMC8P2201000 1 ••• ✓
31 SWITCH PEDAL (ORANGE COLOUR) AMC8T14T10B0 1 •• ✓
SWITCH PEDAL (GREY COLOUR) AMC8T14T1039 1 •• ✓
32 CORD REEL PEDAL (ORANGE COLOUR) AMC8T13T10B0 1 •• ✓
CORD REEL PEDAL (GREY COLOUR) AMC8T13T1039 1 •• ✓
33 SPRING AMC8P2201000 2 ••• ✓
34 ELECTROSTATIC CLEAN AIR FILTER AMC8F28T1000 1 •• ✓
ELECTROSTATIC S-CLASS FILTER AMC8F28T3000 1 •✓
MC-E780
Applied for
all countries (✓)
MC-E781 MC-E783

9
SPARE PARTS LIST
REF. No. DESCRIPTION PART No. Pcs/Set REMARKS
35 EXHAUST COVER (GREEN COLOUR) AMC8T07T10E1 1 •• ✓
EXHAUST COVER (BLUE COLOUR) AMC8T07T10Z4 1 •• ✓
EXHAUST COVER (YELLOW COLOUR) AMC8T07T1093 1 •✓
EXHAUST COVER (BLAK COLOUR) AMC8T07T3061 1 •✓
36 LOWER BODY UNIT AMC8C99T0039 1 •✓
LOWER BODY UNIT AMC8C99T1039 1 •• ✓
37 CASTER AMC8R99D1034 1 ••• ✓
38 WHEEL AMC8R01T1039 2 ••• ✓
39 DUST COVER SEAL AMC8T04T1034 1 ••• ✓
40 SUCTION PACKING AMC8T12T1000 1 ••• ✓
41 FRONT COVER (GREEN COLOUR) AMC8T11T10E1 1 •• ✓
FRONT COVER (YELLOW COLOUR) AMC8T11T1093 1 •✓
FRONT COVER (BLUE COLOUR) AMC8T11T10Z4 1 •• ✓
FRONT COVER (BLACK COLOUR) AMC8T11T1061 1 •✓
42 TAPPING SCREW XTN4+18B 2 ••• ✓
43 CENTRAL FILTER AMC8F03D1100 1 ••• ✓
44 PAPER BAG CLAMP AMC8F02E1134 1 ••• ✓
45 PAPER BAG CLAMP SPRING AMC8F30E1000 1 ••• ✓
46 MOTOR SDS-1504P / AC230V AMC81SF04P00 1 ••• ✓
MOTOR SDS-1503P / AC230-240V AMC81SF03P00 1 ••• ✓Only to UK, Australia, N. Zealand.
47 CARBON BRUSH AMC8201C9801 2 ••• ✓
48 NOISE SUPPRESSOR AMC8E11K1000 1 ••• ✓
49 FRONT MOTOR SUPPORT AMC8E08T1000 1 ••• ✓
50 REAR MOTOR SUPPORT AMC8E09T0000 1 ••• ✓
51 CENTRAL MOTOR SUPPORT AMC8E13L1000 1 •• ✓
52 MOTOR COVER A AMC8D55T1000 1 ••• ✓
53 MOTOR COVER B AMC8D56T1000 1 ••• ✓
54 TAPPING SCREW XTN4+18B 3 ••• ✓
55 THERMAL CUT-OUT AMC8E1401200 1 ••• ✓
56 POWER CONTROL CIRCUIT AMC8E91T0000 1 •✓
POWER CONTROL CIRCUIT AMC8E91T3000 1 •• ✓
57 SLIDING POTENTIOMETER AMC8E1693000 1 •• ✓
58 ON/OFF SWITCH AMC8E01P1000 1 ••• ✓
59 REAR FILTER AMC8F31T1000 1 ••• ✓
60 EXHAUST SUPPRESOR AMC8T10T1000 1 •• ✓
61 CORD REEL UNIT AMC8PZ3P6000 1 ••• Applied to Australia and N.Zealand.
62 CORD REEL UNIT AMC8PZ1P6000 1 ••• Applied to UK and Ireland.
63 CORD REEL UNIT AMC8P88P6000 1 •••
64 CORD REEL UNIT AMC8P97P6000 1 •••
65 CORD REEL AMC8P90P1000 1 ••• ✓
66 RAIL BASE UNIT AMC8P93L1000 1 ••• ✓
67 POWER SUPPLY CORD AMC8EZ3L0061 1 ••• Applied to Australia and N.Zealand.
68 POWER SUPPLY CORD AMC8EZ1L0061 1 ••• Applied to UK and Ireland.
69 POWER SUPPLY CORD AMC8E98L0061 1 •••
70 POWER SUPPLY CORD AMC8E97L0061 1 •••
MC-E780
Applied for
all countries (✓)
MC-E781 MC-E783
Applied to Italy,
Switzerland and Portugal.
Applied to East Europen
countries & West countries,
except above.
Applied to Italy,
Switzerland and Portugal.
Applied to East Europen
countries & West countries,
except above.

10
SPARE PARTS LIST
REF. No. DESCRIPTION PART No. Pcs/Set REMARKS
71 CORD REEL SUPPORT UNIT AMC8P91T1000 1 ••• ✓
72 TAPPING SCREW (CORD REEL) XTT4*16C 1 ••• ✓
73 DUST PAPER BAG (PACK OF 5/PC.) AMC8F96T1000 1 ••• ✓ Detachable type C-20E
74 CLOTH DUST BAG (RE-USABLE) AMC8F99T1000 - ••• ✓ Optional
75 SET COVER AMC8Z05P1000 1 ••• ✓
76 CARTON BOX AMC8Z01T0000 1 •✓
CARTON BOX AMC8Z01T1000 1 •✓
CARTON BOX AMC8Z01T3000 1 •✓
77 CUSHION A AMC8Z02T1000 1 ••• ✓
78 CUSHION B AMC8Z03T1000 1 ••• ✓
79 CUSHION SUPPLEMENT AMC8Z09J2000 1 ••• ✓
80 OPERATING INSTRUCTIONS AMC8Z07T1010 1 •••
OPERATING INSTRUCTIONS AMC8Z07T1070 1 •••
OPERATING INSTRUCTIONS AMC8Z07T1020 1 •••
MC-E780
Applied for
all countries (✓)
MC-E781 MC-E783
Needed a screwdriver type
TORK T20 H
Depend on
language Spanish, English, Portuguese,
Italian, Finish and Greek
Depend on
language
German, Dutch, French,
Swedish, Norwegian and
Danish.
Depend on
language Russian
REPLACEMENT OF MAIN PARTS
IMPORTANT: Before replacing any part always
DISCONNECT THE CLEANER FROM THE
ELECTRICITY SUPPLY.
•MOTOR / CARBON BRUSHES
(1) Motor
1. To remove the dust cover first pull it out from one side and
then rotate it up wards to take it out. (Fig.1)
2. Remove cord reel and switch pedal prying out as indicated
with a flat-head screwdriver. (Fig. 2)
NOTE: When prying out take care not to damage the body.
Fig. 2
Fig. 1
Dust cover
Cord reel Pedal
Switch
Pedal
Flat-head
screwdriver

11
REPLACEMENT OF MAIN PARTS
3. Remove 7 screws from upper body and take out front cover
and upper body. (Fig. 3)
4. Take out cord reel ass’y and remove black and white lead
wires (provided with quick-connect terminal) from the
contact spring tabs. (Fig. 4)
Fig. 4
Motor unit
Fig. 3
Front cover Cord reel
Pedal Switch
Pedal
Upper
body
Lower body
Spring
Spring
Contact
spring
tabs
Cord reel
ass’y

12
REMPLACEMENT OF MAIN PARTS
5. Take out motor unit and remove sliding potentiometer,
exhaust suppressor, rear filter and central motor support.
Then disconnect yellow and black lead wires (provided with
quick-connect terminal) from the power control circuit tabs.
(Fig. 5)
6. Remove 3 screws from motor cover and separate cover A
and B. (Fig. 6)
7. Remove noise suppressor and disconnect yellow and black
lead wires (provided with quick-connect terminals) from the
carbon brush holder tabs.
Fig. 5
Remove
(quick-
connect
terminals)
Fig. 6
Exhaust
suppressor
(Except mod.
MC-E780)
Rear filter
Sliding
potentiometer
Central motor support
(Except mod. MC-E780)
Motor cover B
Motor cover A
Noise
suppressor

13
REPLACEMENT OF MAIN PARTS
8. Remove from the motor rear /front motor supports and
noise suppressor. (Fig. 7)
Fig. 7
9. Replace the motor with a new one and connect yellow and
black lead wires to the carbon brush holder tabs.
NOTE: Yellow lead wire should be connected to carbon
brush holder tab marked with letter “P”.
10.Reassemble front / rear motor supports and noise
suppressor.
NOTE: Make sure the lead wires are correctly positioned to
avoid be pinched between parts and adjust the position of
the rear motor support to the proper motor cover position.
(Fig. 8)
11. Reassemble motor coverA and B and refasten the screws.
NOTE: Before reassemble motor cover A, check the
thermal cut-out is correctly placed in its holding. (Fig. 9)
12.Place the motor unit and cord reel ass’y into the lower body.
13. Connect the lead wires according to the schematic diagram
and reassemble the remaining parts in the reverse order.
Fig. 9
Fig. 8
Front motor
support
Rear motor
support
Motor
Noise
suppressor
Motor cover B
Thermal cut-out
Carbon brush
holder “P”marked

14
Fig. 13
REPLACEMENT OF MAIN PARTS
(2) Carbon brushes
NOTE: The two carbon brushes should be replaced at
the same time.
1. Take out motor unit and remove motor cover A and B as
explained previously in paragraph (1) “Motor”, points 1-6.
2. Disconnect yellow and black lead wires (provided with
quick-connect terminals) from the carbon brush holder tabs.
3. Bend the metal end of the carbon brush holder and take out
the carbon brush. (Fig. 10)
4. Cut off the metal end of the carbon brush. (Fig. 11)
Fig. 12
Fig. 11
Fig. 10
Cut metal end
Carbon
brush
Carbon brush
Metal end
holes
5. Insert the new carbon brush into the brush holder and push
the carbon brush until the protruded pins of the brush holder
fix into the holes of the metal end. (Fig. 12)
6. Connect yellow and black lead wires to the carbon brush
holder tabs and reassemble motor unit.
7. Place motor unit and cord reel ass’y into the lower body.
8. Connect the lead wires according to the schematic diagram
and reassemble the remaining parts in the reverse order.
Metal end
•THERMAL CUT-OUT
1. Take out motor unit and separate motor cover A and B, as
explained previously in paragraph (1) “Motor”, points 1-6.
2. Take out thermal cut- out from its lodging and remove the
lead wires (provided with quick-connect terminal) from the
thermal cut-out tabs. (Fig.13)
3. Replace the thermal cut-out with a new one. Connect the
lead wires to the thermal cut-out tabs and reinstall it.
4. Reassemble motor cover A and B and refasten the screws.
5. Place motor unit and cord reel ass’y into the lower body.
6. Connect the lead wires according to the schematic diagram
and reassemble the remaining parts in the reverse order.
Termal cut-out
•POWER CONTROL CIRCUIT / ON/OFF SWITCH /
SLIDING POTENTIOMETER
(1) Power Control Circuit
1. Take out cord reel ass’y as explained previously in
paragraph (1) “Motor”, points 1-4.
2. Take out motor unit and disconnect yellow and black lead
wires (provided with quick-connect terminals) from the
power control circuit tabs. (Fig. 14)
Fig. 14
Remove
(quick-
connect
terminals)
Power control circuit
Thermal
cut-out tabs

15
REPLACEMENT OF MAIN PARTS
3. Remove power control circuit from its fastening points and
disconnect the lead wires from the power control circuit.
(Fig. 15)
4. Replace power control circuit with a new one and connect
the lead wires according to the schematic diagram.
5. Reinstall power control circuit in its holding points.
6. Place motor unit and cord reel ass’y into the lower body and
reassemble the remaining parts in the reverse order.
Fig. 15
Fig. 17
Fig. 16
(2) ON/OFF Switch
1. Remove upper body as explained previously in paragraph
(1) “Motor”, points 1-3.
2. Take out cord reel ass’y and motor unit.
3. Release power control circuit from its fastening points.
4. Remove ON/OFF switch from the power control circuit and
replace with a new one. (Fig. 16)
5. Place power control circuit in its fastening points.
6. Reinstall motor unit and cord reel ass’y into lower body
connect according to the shematic diagram and
reassemble the remaining parts in the reverse order.
Fastening points
ON/OFF
Switch
Power
control
circuit
(3) Sliding Potentiometer
1. Remove upper body as explained previously in paragraph
(1) “Motor”, points 1-3.
2. Take out the sliding potentiometer from its support and
remove lead wires (blue and grey) from the potentiometer
tabs. (Fig. 17)
NOTE: Observe the correct position of the lead wires
before installing the new one.
Sliding potentiometer
Grey lead wire
Blue lead wire

16
REPLACEMENT OF MAIN PARTS
Fig. 18
3. Replace the potentiometer with a new one and connect the
lead wires (blue and grey) to the potentiometer tabs.
4. Reinstall the potentiometer in its support and reassemble
the remaining parts in the reverse order. (Fig. 18)
•CORD REEL UNIT / POWER CORD
(1) Cord reel unit.
1. Remove upper body and cord reel ass’y as explained
previously in paragraph (1) “Motor”, points 1-4.
2. Before removing the screw that fix the cord reel unit and
cord reel support unwind the power cord to release the cord
reel spring efficiency. Them remove the screw .(Fig. 19)
Fig. 19
Fig. 20
3. Separate cord reel unit and cord reel support. (Fig. 20)
4. Replace the cord reel unit with a new one.
5. Reassemble cord reel unit and cord reel support and
refasten the screw.
NOTE: Wind up the power cord extra times as indicated on
the spring plate to maintain the cord reel spring efficiency.
6. Connect the lead wires according to the schematic diagram
and place the cord reel ass’y into place. Then reassemble
the remaining parts in the reverse order.
Cord reel ass’y
Cord reel support
Screw
Cord reel unit

17
REPLACEMENT OF MAIN PARTS
Fig. 21
Fig. 23
Fig. 22
(2) Power cord
1. Remove cord reel unit as explained previously in
paragraph (1) “Cord reel unit”, points 1-3.
2. Unwind the total power cord length from the cord reel.
3. Press and release the stopper on the cord reel and lift the
contact base by pushing its lower end. (Fig. 21)
4. Disconnect the power cord from the contact base and
replace it with a new one. (Fig. 22)
NOTE: Observe the colour of the power cord lead wires
before reinstalling the new one.
5. Insert the contact base through the cord reel slot and wind
up the total power cord length in the arrow direction as
indicated on the spring plate. (Fig. 23)
6. Reassemble cord reel unit and cord reel support and
refasten the screw. Then wind up the power cord extra
times as indicated on the spring plate to maintain spring
efficiency.
7. Place cord reel ass’y into the lower body . Connect the lead
wires according to he schematic diagram and reassemble
the remaining parts in the reverse order. Contact base
Blue wire
Brown wire
Stopper
Fig. 24
Brake lever
unit
Fig. 25
•BRAKE LEVER UNIT
1. Remove upper body as explained previously in paragraph
(1) “Motor”, points 1-3.
2. Turn upper body over exposing the underside and remove
brake lever unit by pressing it sidewards as indicated.
(Fig. 24)
3. Replace the brake lever unit with a new one and reinstall it
in its lodging. (Fig. 25)
4. Reassemble upper body and remaining parts in the reverse
order.
Brake lever unit
Spring

18
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.
Trimmer Potentiometer Place the sliding potentiometer at min. If it is adjusted at 450W
(VR1) power and check if the potentiometer and the motor doesn’t work,
(VR1) is adjusted at 450W. replace power control circuit.
Motor runs but Hose or Suction inlet. Check if there is any blockage If there is any blockage,
does not 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.
NOTE: Parts marked (*)only affect to mdels MC-E781 and MC-E783.

19
PACKING INSTRUCTIONS
12
34
56