JVC AV-48WP34/AHA Service Manual page 19

! MAIN UNIT
" Remove the SPEAKER GRILLE.
" Remove the connector
BH
FRONT CONTROL PWB.
" Remove the REAR PANEL.
1. Remove 4 screws O! from front side.
2. Pull out the MAIN UNIT rear side.
NOTE :
" Except for confirmation of projection of images on the screen
and audio output through the speakers, the removed main
unit is still workable in the same state as if it is still built in the
TV set. Therefore, the main unit can be removed, if
necessary, for board diagnosis, electric testing, etc. apart
from confirmation of screen images and audio output.
" When wire clamps are removed during work, use care to
restore them precisely
Performance can be affected if these are not returned to the
original positions.
" Because of the large size, at least two persons are
recommended for removal and reassemble.
" When carrying the main unit, use care not to drop, shock or
shake it.
" Do not stain or damage the lens of the projection unit.
" Do not look through the projection unit.
# CHECKING THE P.W. BOARD
When checking the MAIN PWB, POWER & DEF PWB, etc., raise
the MAIN UNIT with the DIVIDER side down for the sake of
convenience. You can checking the MAIN P.W.B.
! LINE FILTER P.W. BOARD
" Remove the REAR PANEL.
" Remove the AV JACK BOARD.
1. Disconnect the connector
BOARD.
2. Remove 3 screws P attaching the LINE FILTER BRACKET and
earth wire.
3. Remove 2 screws Q attaching LINE FILTER P.W. BOARD.
4. Remove the LINE FILTER P.W. BOARD.
! MAIN CHASSIS
" Remove the REAR PANEL.
" Remove the AV JACK BOARD.
" Remove the LINE FILTER BRACKET.
1. Remove 2 screws R both side of the MAIN CHASSIS.
2. Remove 1 screws R' attaching the earth wire.
3. Pull out the MAIN CHASSIS for back side.
NOTE :
" If
necessary, remove the anode wires,
respectively.
, X , R , BG on the
to their original positions.
B F on the LINE FILTER P.W.
connectors,
MAIN UNIT
O
F
EARTH WIRE
P
P
LINE FILTER BRACKET
EARTH WIRE
R
MAIN CHASSIS
No. 51914
AV-48WP30
B
LINE FILTER BRACKET
Q
LINE FILTER P.W.BOARD
EARTH WIRE
R'
R
13