JVC AV 27D502, Руководство по обслуживанию

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AV-27D502
8 No. 51797
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power supply cord.
2. Remove the 12 screws marked A as shown 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 CHASSIS
•
After removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and remove the
3 claws marked B under the chassis from the front cabinet as
shown in Fig.1.
2. Withdraw the chassis backward along the rail in the arrow direction
marked C as shown in Fig.1.
(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 TERMINAL BOARD
•
After removing the rear cover.
1. Remove the 4 screws marked D as shown in Fig.1.
2. When you pull out the TERMINAL BOARD in the direction of arrow
marked E as shown in Fig.1, it can be removed.
REMOVING THE FRONT CONTROL AND FRONT AV
INPUT PW BOARDS
•
After removing the rear cover and chassis.
1. Remove the 3 screws marked F and the 2 screws marked J as
shown in Fig.1.
2. Then remove the FRONT CONTROL PWB and FRONT AV INPUT
PWB.
(If necessary, take off the wire, connector’s etc.)
REMOVING THE LF PW BOARD
•
After removing the rear cover and chassis.
1. Lift the left side of the LF PWB while pressing the 2 PWB stoppers
marked G in the arrow direction marked H as shown in Fig.1.
2. Then remove the LF PWB.
(If necessary, take off the wire, connector’s etc.)
SPECIFIC SERVICE INSTRUCTIONS
REMOVING THE SPEAKER
•
After removing the rear cover.
1. Remove the 4 screws marked K as shown in Fig.1.
2. Withdraw the speaker backward.
3. Follow the same steps when removing the other hand speaker.
CHECKING THE MAIN PW BOARD
1. To check the back side of the MAIN 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 MAIN PW Board.
[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.
WIRE CLAMPING AND CABLE T YING
1. Be sure 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.