Specific Service Instructions; Disassembly Procedure - JVC AV-21W33 Service Manual

AV-21W33
AV-21W33B

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE TWIN PORT BASS BLASTER UNIT
[AV-21W33B only]
/T
1. Unplug the power supply cord.
2. Disconnect the Twin Port Bass Blaster Unit's cord from the rear of
the TV set.
3. Remove the Twin Bass Blaster Unit by pulling it upwards.
[REMARK]
•
After removing the Twin Port Bass Blaster Unit, proceed to the fol-
lowing procedure.
REMOVING THE REAR COVER
1. Unplug the power supply cord.
2. Remove the 9 screws marked
in Fig.1.
3. Withdraw the Rear cover toward you.
[CAUTION]
•
When reinstalling the rear cover, carefully push it inward after in-
serting the Main PWB into the rear cover groove.
REMOVING THE MAIN PW BOARD
•
After removing the rear cover.
1. Slightly raise the both sides of the Main PWB by hand, take off the
Ç
PB stopper marked from the front cabinet.
2. Withdraw the Main PWB backward.
(If necessary, take off the wire clamp and connectors, etc.)
REMOVING THE SPEAKER
•
After removing the rear cover.
1. Remove the 2 screws marked
2. Follow the same steps when removing the other hand speaker.
CHECKING THE MAIN PW BOARD
1. To check the back side of the Main PWB.
1) Pull out the Main PWB. (Refer to REMOVING THE MAIN PW
BOARD).
2) Erect the Main PWB vertically so that you can easily check its
back side.
[CAUTION]
•
Before turning on power, make sure that the CRT earth wire and
other connectors are properly connected.
•
When repairing, connect the Deg. coil to the DEG. connector on the
Main PWB.
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.
6
Å ı
and 4 screws maked as shown
Î
as shown in Fig.1.
No. 52075