JVC MX-J270V Service Manual page 9

Removing the main board
Prior to performing the following procedures, remove
the metal cover, the CD changer mechanism
assembly, the rear cover, the rear panel, the voltage
selector and the video board.
It is not necessary to remove the front panel
assembly.
1.
Disconnect the card wires from connector CN302,
CN306, CN307 and the harnesses from CN301,
CN305, CN901A and CN901B on the inside of the
main board.
2.
Disconnect the harness from CN312 on the video
board.
3. From the right side of the body, remove the screw M
attaching the main board to the chassis base.
~To remove the heat sink from
Prior to performing the following procedure, remove
the rear cover, rear panel, voltage selector and the
video board.
1. Remove the two screws N attaching the heat sink to
the main board. Remove the IC bracket 1 and 2 on
the back of the heat sink.
2.
Pull out the heat sink toward you.
Removing the DSP board
Prior to performing the following procedures, remove
the main board.
1. Release the two joints h and i using a screwdriver
and detach the DSP board toward you.
IC bracket 2
Heat sink
IC bracket 1
(See Fig.16 to 19)
the main board~
(See Fig.19)
Joint h
Joint i
DSP board
Fig.19
Main board CN302
CN301
CN305
CN312
Video board
CN901A,CN901B
Main board
Main board
N
MX-J270V
CN306
CN307
DSP board
Fig.16
M
Fig.17
DSP board
Heat sink
Fig.18
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