JVC AV-29QH4BU, Service Manual

Page: 4 / 43

1-6 (No.YA086)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
(1) Unplug the power cord.
(2) Remove the 8 screws
[A] .
(3) Remove the 4 screw [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 FEATURE BOX PWB
• Removing the REAR COVER.
(1) Disconnect the connector PL409 and PL410 on the MAIN
PWB.
(2) Raise up the both sides and disconnect the FEATURE
BOX PWB.
3.1.4 REMOVING THE MAIN PWB
• Removing the REAR COVER.
(1) Remove the 4 screws [D] .
(2) Slightly raise the both sides of the MAIN PWB by hand and
withdraw MAIN PWB backward.
(If necessary, take off the wire clamp, connectors etc.)
(Be careful enough when developing a MAIN PWB.)
3.1.5 REMOVING THE SIDE CONTROL PWB
• Removing the REAR COVER.
• Removing the CHASSIS.
(1) Remove the 2 screws [E] , and remove the SIDE
CONTROL PWB.
3.1.6 REMOVING THE AV & HEADPHONE PWB
• Removing the REAR COVER.
• Removing the CHASSIS.
(1) Remove the 3 screws [F] , and remove the AV &
HEADPHONE PWB.
3.1.7 REMOVING THE POWER SWITCH PWB
• Removing the REAR COVER.
• Removing the CHASSIS.
(1) Remove the 2 screws [G] , and remove the POWER
SWITCH.
3.1.8 REMOVING THE LED PWB
• Removing the REAR COVER.
• Removing the CHASSIS.
• Removing the POWER SWITCH PWB
(1) Remove the 2 screws [H] , and remove the LED PWB.
3.1.9 REMOVING THE WOOFER & TWEETER
• Removing the REAR COVER.
(1) Remove the 4 screws [I] , and remove the WOOFER.
(2) Remove the 2 screws [J] , and remove the TWEETER.
(3) Remove an opposite side similarly.
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 PWB.
[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 PWB.
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.