JVC AV-34WP84 /ZA Service Manual page 10

3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
• Unplug the power supply cord.
(1) Remove the 16 screws [A] as shown in Fig.1.
(2) Remove the REAR COVER toward you.
NOTE:
When reinstalling the REAR COVER, carefully push it inward
after inserting the chassis into the REAR COVER groove.
3.1.2 REMOVING THE AV TERMINAL BOARD
• Remove the REAR COVER.
(1) Remove the 7 screws [B] as shown in Fig.1.
(2) When you pull out the AV TERMINAL BOARD in the
direction of arrow [a] as shown in Fig.1, it can be removed.
3.1.3 REMOVING THE CHASSIS
• Remove the REAR COVER.
(1) Slightly raise the both sides of the CHASSIS by hand and
remove the 2 claws under the both sides of the CHASSIS
from the front cabinet.
(2) Draw the CHASSIS backward along the rail in the arrow
direction [a] as shown in Fig.1.
(If necessary, take off the wire clamps, connectors etc.)
NOTE:
When conducting a check with power supplied, be sure to
confirm that the CRT earth wire is connected to the CRT
SOCKET PWB and MAIN PWB or DEF & POWER PWB.
3.1.4 REMOVING THE CONTROL BASE
• Remove the REAR COVER.
Remove the CHASSIS.
(1) While pushing down the claws [b] as shown in Fig.2.
(2) Remove the CONTROL BASE in the arrow direction
marked [c].
( If necessary, take off the wire clamps, connectors etc. )
3.1.5 REMOVING THE DIGITAL INPUT MODULE PWB
• Remove the REAR COVER
• Remove the AV TERMINAL BOARD.
(1) Remove the 2 screws [C] as shown in Fig.1.
(2) Remove the DIGITAL INPUT MODULE PWB in the arrow
direction [d].
NOTE:
If necessary, take off the wire clamps, connectors etc.
AV-34WP84/ZA 34WP84CP-S
DIGITAL INPUT MODULE
POWER CORD
AV TERMINAL
BOARD
1-10 (No.52170)
SECTION 3
DISASSEMBLY
CAUTION AT DISASSEMBLY
wire
SSB-7976A-M2
WJJ0247-001A
1 2
3 4
5 6
SB
connector
3.1.6 REMOVING THE DOME SPEAKER BOX
• Remove the REAR COVER.
(1) Remove the 2 screws [D] as shown in Fig.1.
(2) Remove the DOME SPEAKER BOX toward you.
(3) Follow the same steps when removing the other hand
speaker.
3.1.7 REMOVING THE SPEAKER / SPEAKER HOLDER
• Remove the REAR COVER.
• Remove the DOME SPEAKER BOX
(1) Remove the 2 screws [E] as shown in Fig.1.
(2) Remove the SPEAKER HOLDER toward you.
(3) Remove the 2 screws [F] as shown in Fig.1.
(4) Draw the SPEAKER toward you.
(5) Follow the same steps when removing the other hand
SPEAKER.
3.1.8 CHECKING THE PW BOARD
• To check the backside of the circuit board.
(1) Pull out the CHASSIS. (Refer to REMOVING THE
CHASSIS).
(2) Erect the CHASSIS vertically so that you can easily check
the backside of the PW Board.
CAUTION:
• When erecting the CHASSIS, be careful so that there will be
no contact with other PWB.
• Before turning the power on, make sure that the CRT earth
wire and other connectors are properly connected.
3.1.9 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.
Prior to disassembly, unplug the power cord from the wall
outlet without fail. (Turn the power "off".)
Short the SB connector (1) pin and (2) pin of the digital input
unit. (At the time of assembling)
Before the rear cover is inserted into the cabinet, release the
short-circuit between the SB connector (1) pin and (2) pin of
the digital input unit.
After releasing the short-circuit between the SB connectors,
do not turn the power on until the rear cover is inserted into
the cabinet.
Negligence in carrying out the above steps may cause the
inactivation of the TV.