Disassembly; Tweeter - JVC AV-28ED5BN Service Manual

3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
(1) Unplug the power cord.
(2) Remove the 8 screws [A] as shown in the Fig. 1.
(3) Remove the 4 screws [B].
(4) Withdraw the REAR COVER toward you.
3.1.2 REMOVING THE BACK DOOR
• Remove the REAR COVER
(1) Remove the 2 screws [C].
(2) Withdraw the BACK DOOR toward you.
3.1.3 REMOVING THE MAIN PWB
• Remove the REAR COVER.
• Remove the BACK DOOR.
(1) Remove the 4 screws [D].
(2) Remove the MAIN PWB.
CAUTION :
If necessary, take off the wire clamp, connectors etc.
Be careful enough when developing a MAIN PWB.
3.1.4 REMOVING THE FEATURE BOX PWB
• Remove the REAR COVER.
• Remove the BACK DOOR.
(1) Disconnect the connector PL423 and PL424 on the MAIN
PWB.
(2) Raise up the both sides and disconnect the FEATURE
BOX PWB.
3.1.5 REMOVING THE SIDE CONTROL PWB
• Remove the REAR COVER.
(1) Remove the 4 screws [E].
(2) Remove the SIDE CONTROL PWB.
3.1.6 REMOVING THE BASE
• Remove the REAR COVER.
(1) Remove the 2 screws [F].
(2) Remove the BASE.
NOTE:
Work after fixing so that a CRT screen may be placed upside
down or it may not fall.
3.1.7 REMOVING THE POWER SWITCH PWB
• Remove the REAR COVER.
(1) Remove the 2 screws [G], and remove the POWER
SWITCH PWB.
3.1.8 REMOVING THE LED PWB
• Remove the REAR COVER.
• Remove the POWER SWITCH PWB.
(1) Remove the 2 screws [H], and remove the LED PWB.
3.1.9 REMOVING THE SPEAKER and TWEETER
• Remove the REAR COVER.
(1) Remove the 4 screws [I], and remove the SPEAKER.
(2) Remove the other hand SPEAKER in the same steps.
(3) Remove the 2 screws [J], and remove the TWEETER.
(4) Remove the other hand TWEETER in the same steps.
SECTION 3

DISASSEMBLY

3.1.10 CHECKING THE PW BOARD
• To check the back side of the PW Board.
(1) Pull out the PW Board. (Refer to REMOVING THE MAIN
PWB).
(2) Erect the PW Board vertically so that you can easily check
the back side of the PW Board.
CAUTION :
• When erecting the PW Board, be careful so that there will be
no contacting with other PW Board.
• Before turning on power, make sure that the wire connector
is properly connected.
• When conducting a check with power supplied, be sure to
confirm that the CRT EARTH WIRE (BRAIDED ASS'Y) is
connected to the CRT SOCKET PW board.
3.1.11 WIRE CLAMPING AND CABLE TYING
(1) Be sure to clamp the wire.
(2) Never remove the cable tie used for tying the wires
together.
Should it be inadvertently removed, be sure to tie the wires
with a new cable tie.
(No.YA316)1-5