Mitsubishi Electric MXZ-2C20NA2 Service Manual page 147

OPERATING PROCEDURE
(14) Disengage all the catches of the PB cover, and remove
the PB cover (Photo 9).
(15) Remove the screw fixing the outdoor power P.C. board
and all the screws fixing the outdoor power P.C. board
and the heatsink (Photo 10).
(16) Disengage all the catches of the outdoor power P.C.
board, and lift the outdoor power P.C. board (Photo 10).
(17) While lifting the outdoor power P.C. board, disconnect the
lead wires, the connectors, and the earth wires; then
remove the outdoor power P.C. board (Photo 11).
NOTE: When reassembling, pass the lead wire of the
CN171 thorough the notch and behind the lead
wire of the compressor (Photo 12).
(18) Remove all the screws of the heatsink fixing parts and
remove the heatsink fixing parts (Photo 13).
NOTE: Some units have only 1 heatsink fixing part.
(19) Remove the heatsink.
Photo 11
(NA, NA2, NA3)
Connetor of CN171
Earth wires of TBE2, TBE4
OBH702N
Photo 9
Photo 10
Screw of the power
P.C. board
Screws of the power
P.C. board and the
heatsink
(NA4)
Lead wires of
TAB1, TAB2
Connetor
of CNAC1
147
PHOTOS/FIGURES
Catches of PB cover
Connetor of CN171
Earth wires of
TBE3, TBE4, TBE5
Catches of the
power P.C. board
Connetor
of CNAC1
Lead wires of
TAB1, TAB2