Specific Service Instructions - JVC AV28L2EUGR Service Manual

AV28L2EUGR
AV28L2EUBL
AV28L2EUGY

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power cord.
2. Remove the 11 screws marked "A" as shown in the Fig. 1.
3. Withdraw the rear cover toward you.
REMOVING THE SIDE CONTROL JACK ASSEMBLY
" After removing the rear cover.
1. Remove the screw marked B as shown in the Fig.1.
2. While slightly raise the side control jack assembly, remove the 2
claws under the side control jack assembly.
3. Disconnect the connector "SR", "SL", "S", "F" and "K" as shown
in Fig 2.
REMOVING THE SIDE CONTROL PWB
" After removing the rear cover and side control jack assembly.
1. Remove the 3 claws "C" from back side of the side control jack
assembly as shown in Fig.2.
2. Pull out the SIDE CONTROL PWB.
REMOVING THE CHASSIS
" After removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and remove
the two claws under the both sides of the chassis from the front
cabinet.
2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER BOX
" After removing the rear cover.
1. Remove the 2 screws marked "D" as shown in Fig. 1.
NOTE : When removing the screws marked D of the speaker box
assembly, remove the lower side screw first, and then
remove the upper one.
2. Remove the 2 screws "E" attaching the speaker box.
3. Remove the 2 screws "F" attaching the speaker.
4. Follow the same steps when removing the other hand speaker.
REMOVING THE AV TERMINAL BOARD
" After removing the rear cover.
1. Remove the 3 screws marked "G" as shown in the Fig. 1.
2. Remove the 2 claws marked "H" under the CHASSIS as shown
in Fig. 3.
3. Remove the AV TERMINAL BOARD slightly in the direction of
arrow "I" as shown in Fig. 3.
6
CHECKING THE PW BOARD
To check the back side of the PW Board.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect the chassis vertically so that you can easily check the
back side of the PW Board.
[CAUTION]
" When erecting the chassis, 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.
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.
Connector
SR
SL
S
F
K
I
AV TERMINAL
BOARD
No.51778
C
SIDE CONTROL
PWB
C
(Back view)
Fig. 2
H
H
AV SW PWB
Fig. 3