JVC MX-K50 Service Manual page 8

MX-K50
Removing the main board
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1. Disconnect the card wire from the connector FCW3
and the harness from the connector ECW1, JCW1,
JCW2 and HCW3 on the main board.
2. Disconnect the harness from the connector PCW1
on the fuse board.
3. Remove the screw G attaching the main board to the
front panel assembly. (See Fig.9)
4. Remove the two screws P attaching the heat sink to
the bottom chassis.
5. Pull out the voice board, if needed.
Removing the power cord
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1. Disconnect the power cord from the connector
RCW2 on the trans. board and pull up the power
cord stopper upward.
Removing the power IC
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1. Unsolder the power IC solder point.
2. Remove the two screws Q attaching the power IC to
the heat sink.
Removing the power transformer
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1. Remove the screw N attaching the trans. board to the
rear panel (see fig.12).
2. Disconnect the power cord from the connector RCW2
on the trans. board.
3. Disconnect the harness from the connector PCW1 on
the fuse board.
4. Remove the four screws R attaching the power
transformer on the bottom chassis.
1-8
(See Fig. 14)
(See Fig. 14)
(See Fig.15 and 16)
(See Fig .17)
ECW1
HCW3
Fuse board
PCW1
Trans. board
RCW2
Power cord
Power cord
stopper
Bottom chassis
Fig.14
Power IC solder point
Fig.15
Fig.16
Power transformer
R
Bottom chassis
Fig.17
FCW3
JCW2
JCW1
Main board
Voice board
Heat sink
P
Heat sink
Amp. board
(reverse side)
Q
Heat sink
Amp. board
Fuse board
PCW1
Trans. board
RCW2