JVC AV-21BT8ENS Service Manual page 6

AV-21BT8ENS AV-21BT8ENB
AV-21BT8EPS AV-21BT8EPB
AV-21BT8EES AV-21BT8EEB
AV-21BT80EP
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power c ord.
2. Remove the 5 screws marked A as shown in the Fig. 1.
3. Withdraw the rear cover toward you.
REMOVING THE MAIN PWB
" Removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and withdraw
the MAIN PWB backward.
(If necess ary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER
" Removing the rear cover.
1. Remove the 4 screws marked B, and remove speaker as s hown
in Fig. 1.
2. Remove the speaker.
REMOVING THE FRONT AV PWB
" Removing the rear cover.
" Removing the MAIN PWB.
1. Remove the 2 screws marked C.
2. Remove the FRONT AV PWB.
REMOVING THE HEADPHONE PWB
" Removing the rear cover.
" Removing the MAIN PWB.
1. Remove the 1 screw marked D.
2. Remove the HEADPHONE PWB.
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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 vertic ally so that you c an easily check
the back side of the PW Board.
[CAUTION]
" When erecting the PW Board, be c areful so that there will be no
contacting with other PW Board.
" Before turning on power, make sure that the wire connector is
properly connec ted.
" When conducting a check with power supplied, be sure to c onfirm
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 c able tie used for tying the wires together.
Should it be inadvertently removed, be sure to tie the wires with
a new c able tie.
No.52054