JVC XV-N50BK Service Manual page 9

2.1.3 Removing the mechanism assembly (See Figure 2, Figure 5, Figure 6)
• Prior to performing the following procedure, remove the top
cover.
• There is no need to remove the front panel assembly.
(1) Insert a kind of screwdriver in a hole located in the right
side of mechanism assembly, and push a lever until it can-
not be inserted any further. (See Figure 2)
(2) And then, a tray will come out. Remove the tray in an upper
direction, with slightly opening the lower part of fitting in an
outward direction. (See Figure 2)
(3) Remove the three screws C attaching the mechanism as-
sembly.
(4) The switch on a relay board is made into the "SHORT" side.
(5) Disconnect the card wire from connector CN101 on the
servo control and signal output terminal board.
(6) Remove the mechanism assembly by lifting the rear part of
the mechanism assembly.
ATTENTION:
Please be sure to make the switch on a relay board into a
"SHORT" side before disconnect a card wire from the connec-
tor CN101 on servo control and signal output terminal board.
Moreover, please be sure to make a switch into the "OPEN"
side after inserting a card wire in a connector CN101 at the
time of an assembly.
There is a possiblity of destroying the laser diode of a pick-up
unit with static electricity.
2.1.4 Removing the relay board (See Figure 7)
• Prior to performing the following procedure, remove the mech-
anism assembly.
(1) Remove the four screws D attaching the relay board.
(2) Disconnect the card wire from connector CN2,CN3 on the
relay board respectively.
(3) Disconnect the flexible wire from connector CN1 on the re-
lay board from pick-up unit.
ATTENTION:
At this time, please extract the wire after short-circuited
of two places on the wire in part c with solder. Please re-
move the solder two places of part c after connecting the
wire with CN1 when reassembling.
There is a possibility of destroying the laser diode of a
pick-up unit with static electricity.
Mechanism assembly
CN101
C
Servo control and signal
output terminal board
Fig.5
Mechanism assembly
Switch
SHORT SHORT OPEN OPEN OPEN
Fig.6
CN2
CN3
D
CN1
Relay board D
Fig.7
XV-N50BK,XV-N55SL
C
C
Relay board
Part c
D
D
(No.A0041)1-9