Specific Service Instructions - JVC AV-34LS Service Manual

AV-34LS AV-34LX
AV-34LH AV-3408TEE

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the AC power cord.
2. Remove the 18 screws marked
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 CHASSIS (CHASSIS BASE AND
CONTROL BASE)
•
After removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and remove the
ı
2 claws marked under the chassis from the front cabinet as shown
in Fig.1.
2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connector's etc.)
* When conducting a check with power supplied, be sure to confirm
that the CRT earth wire is connected to the CRT Socket PWB and
the Main PWB.
REMOVING THE AV TERMINAL BOARD
•
After removing the rear cover.
1. Remove the 4 screws marked
2. When you pull out the AV Terminal board in the direction of arrow
Î
marked as shown in Fig.1, it can be removed.
REMOVING THE CONTROL BASE
•
After removing the rear cover and the chassis.
1. While pushing down the 2 claws maked
2. When you pull out the Control base in the direction of arrow maked
Ï
as shown in Fig. 2.
(If necessary, take off the wire, connector's etc.)
REMOVING THE SPEAKER
•
After removing the rear cover.
1. Remove the 4 screws marked
2. Withdraw the speaker backward.
3. Follow the same steps when removing the other hand speaker.
6
Å
as shown in Fig.1.
Ç
as shown in Fig.1.
´
as shown in Fig. 2.
˝
as shown in Fig.1.
CHECKING THE MAIN PW BOARD
1. To check the back side of the Main PWB.
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 Main PWB.
[CAUTION]
•
When erecting the chassis, be careful so that there will be no con-
tacting with other PW Board.
•
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.
No. 51854