Mitsubishi Electric PUZ-SWM60VAA Service Manual page 75

OPERATING PROCEDURE
4. Disassembling the electrical parts box
(V-type model only)
(1) Remove the electrical parts box. (See Photo 3-1)
(2) Disconnect all the connectors on the controller circuit board.
(3) To remove the controller circuit board, release it from
the supports.
(4) Remove the cont base front fixing screws
(3 for front/ 4 × 10) to remove the cont base front.
(The cont base front is fixed to the electrical parts box
with the hooks on the left side.)
(5) Disconnect all the connectors on the power circuit board.
(6) Remove the PB fixture fixing screws (4 for front/ 3 × 12)
to remove the PB fixture.
(7) To remove the power circuit board, remove the power
circuit board fixing screws (4 for front/ M3 × 12 and 2 for
front/ M4 × 12), then release the board from
the PB holder.
(8) For 60-80V models
Disconnect the connectors on the reactor,
then remove the reactor (DCL) fixing screws
(4 for rear/ 4 × 10) to remove the reactor.
For 100-120V models
Disconnect the connectors on the reactors,
then remove the reactor (DCL) fixing screws
(6 for rear/ 4 × 10) to remove the reactors.
(9) Remove the thermistor <Heat sink> (TH8) fixing screw
(1 for front/ M3 × 8) to remove the thermistor <Heat sink>
(TH8).
(10) To remove the heat sink, remove the heat sink fixing
screws (4 for front/ 4 × 10), then release the heat sink
from the PB holder.
Note 1: When reassembling the electrical parts box, make
sure the wirings are correct.
5. Disassembling the electrical parts box
(Y-type model only)
(1) Remove the electrical parts box. (See Photo 3-1)
(2) Disconnect all the connectors on the controller circuit board.
(3) To remove the controller circuit board, release it from the supports.
(4) Remove the cont base front fixing screws (3 for front/ 4 × 10) to
remove the cont base front.
(The cont base front is fixed to the electrical parts box with the
hooks on the left side.)
(5) Disconnect all the connectors from the noise filter circuit board
and resistor.
(6) To remove the noise filter circuit board, release it from the support.
Remove the resistor fixing screw (1 for front/ 4 × 10) to remove the
resistor.
(7) Remove the cont base fixing screws (3 for front/ 4 × 10)
to remove the cont base.
(The cont base is fixed to the electrical parts box with the
hooks on the left side.)
(8) Disconnect all the connectors from the converter circuit board.
(The converter circuit board is attached to the rear side of the
cont base.)
(9) To remove the converter circuit board, release it from the support.
(10) Disconnect all the connectors from the power circuit board.
(11) To remove the power circuit board, remove the power
circuit board fixing screws (4 for front/ M4 × 14), then
release the board from the support.
(12) Remove the thermistor <Heat sink> (TH8) fixing screws (2
for front/ M3 × 12) to remove the thermistor <Heat sink> (TH8).
(13) Disconnect the connectors from reactor (ACL4) first, then
remove the fixing screws of reactor and capacitor (3 for
front/ 4 × 10), and remove reactor and capacitor.
(14) Remove the PB Holder fixing screws (9 for front/ 4 × 10)
to remove the PB Holder.
(15) Remove the heat sink fixing screws (6 for front/ M4 × 8)
to remove the heat sink.
Note 1: When reassembling the electrical parts box, make
sure the wirings are correct.
OCH809A
PHOTOS/ FIGURES
Photo 4-1
Cont base front
Controller circuit board
Photo 4-3
Reactor
Reactors
For 60-80V
models
For 100-120V
models
Photo 5-1
Cont base front
Controller circuit board
Photo 5-3
Converter circuit board
Photo 5-5
Thermistor <Heat sink> (TH8)
75
Photo 4-2
Power circuit board
Photo 4-4
Thermistor <Heat sink> (TH8)
Heat sink
Photo 5-2
Resistor
Noise filter circuit board
Cont base
Photo 5-4
Power circuit board
Capacitor
Reactor
Heat sink