Panasonic MC-E8021-AR79 / MC-E8023-KR79 Service Manual ▷ View online
3. Remove screws from upper body and take out front cover
and upper body. (Fig.3)
*There are 2 latches in the back side of Upper body.
Please remove it by pulling strongly from the front side.
Please remove it by pulling strongly from the front side.
Important:
When
reassembling
the
Switch
Pedal,
please place ControlAxis and Switch Pedal in the right
place as they can fit.
place as they can fit.
4. Lift up cord reel unit and remove the two lead wires
(provided with quick-connect terminal) from the contact
springs. (Fig. 4)
springs. (Fig. 4)
5. Take out motor unit and remove motor cover. (Fig.5)
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MC-E8021-AR79 / MC-E8023-KR79
6. Disconnect the two lead wires (provided with quick-connect
terminals) from the motor tabs. (Fig.6)
7. Remove from the motor front / rear motor support and
replace with a new one. (Fig.7)
8. Reassemble front / rear motor support and connect the two
lead wires to the motor tabs. Place the motor cover and
reinstall the motor unit into the lower body.
reinstall the motor unit into the lower body.
9. Connect the lead wires according to the schematic diagram
and reassemble the remaining parts in the reverse order.
Note: Make sure the lead wires are correctly positioned
to avoid pinching them between parts.
to avoid pinching them between parts.
3.2. CARBON BRUSHES
Note: Replace both carbon brushes at the same time.
1. Take out motor unit and remove motor cover as explained
previously in paragraph 3.1 Motor, points 1-6.
2. Disconnect
lead
wires
(provided
with
quick-connect
terminal) from the motor tabs.
3. Remove the two screws from the carbon brush holder and
take it out. (Fig.8)
4. Replace the carbon brush unit with a new one and reinstall
it refastening with the screw.
5. Connect the lead wires according to the schematic diagram
and reassemble the motor unit.
6. Re-install motor unit, cord reel ass´y into their lodging and
reassemble the remaining parts in the reverse order.
3.3. AS FOR THERMAL CUT-OUT
1. Take out motor unit and remove motor cover as explained
previously in paragraph 3.1 Motor, points 1-6.
2. Disconnect
lead
wires
(provided
with
quick-connect
terminal) from the motor tabs.
3. The thermal cut-out is secured in the motor. (Fig.9)
*To change the Thermal Cut-out,replace the entire motor
with new one. You can´t replace only the Thermal Cut-out..
with new one. You can´t replace only the Thermal Cut-out..
4. Connect the lead wires according to the schematic diagram
and reassemble motor unit and remaining parts in the
reverse order.
reverse order.
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MC-E8021-AR79 / MC-E8023-KR79
3.4. CORD REEL UNIT
1. Remove upper body and take out cord reel ass`y as
explained previously in paragraph 3.1 Motor, points 1-4.
2. Press the blake lever and unwind the power supply cord
three times to release the cord reel spring efficiancy.
(Fig.10)
(Fig.10)
3. Detach cord reel unit and cord reel support by removing the
screw. (Fig.11)
4. Replace the cord reel unit with a new one and reassemble
with the cord reel support refastening the three screw.
Note: Wind up the power supply cord 2 extra times, as
indicated on the spring plate, to maintain the spring
efficiency.
indicated on the spring plate, to maintain the spring
efficiency.
5. Connect the lead wires according to the schematic diagram.
6. Reinstall cord reel ass´y into place and reassemble the
remaining parts in the reverse order.
* If the cord is damaged, replace the cord reel unit with
new one.
new one.
Reason:
If the cord has worn out, the cord reel spring or the
cord´s electric-welded zone may also be adversely
affected.
cord´s electric-welded zone may also be adversely
affected.
3.5. BRAKE LEVER UNIT
1. Remove upper body and cord reel assembly as explained
previously in paragraph 3.1 Motor, points 1-4.
2. To change the brake lever unit, replace the body partition
assy with new one. (Fig.12)
Reason:
The body partition and the brake lever cannot be
individually removed.
individually removed.
3.6. P.C.B. Unit
1. Remove upper body as explained previously in paragraph
3.1 Motor, points 1-3.
2. Remove connections from contact spring and take out
motor unit.
3. Remove P.C.B. Ass’y from its support by releasing the
fixing points. (Fig.13)
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MC-E8021-AR79 / MC-E8023-KR79
4. Remove from PCB the two lead wires provided with quick-
connect terminal. (Fig.14)
*The fuse is replaceable at the same time.
*The fuse is replaceable at the same time.
5. Open the cover, remove the small PCB (with ON / OFF
Switch) from its lodging and take out control Axis. (Fig.15)
ON/OFF Switch
Power control circuit is welded to ON/OFF Switch that is
connected to P.C.B.Assy.
You can cut off with weld it.
connected to P.C.B.Assy.
You can cut off with weld it.
6. Replace P.C.B. Ass’y with a new one and control Axis.
7. Connect the two lead wires (provided with quick-connect
terminal) to the PCB tabs and reinstall power control circuit
in its support. (Fig.17)
in its support. (Fig.17)
Note: Before reinstalling the circuit, make sure the lead
wires are correctly positioned in the cover slots.
wires are correctly positioned in the cover slots.
8. Place back the motor unit. Connect the lead wires
according to the schematic diagram and reassemble upper
body and remaining parts in the reverse order.
body and remaining parts in the reverse order.
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MC-E8021-AR79 / MC-E8023-KR79
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