Sony KV-21FA340 Service Manual ▷ View online
KV-21FA340/21FA540/29FA340/29FA540
KV-21FA340/21FA540/29FA340/29FA540
10
1-1. REAR COVER REMOVAL
(KV-29FA540
PICTURED)
SECTION 1: DISASSEMBLY
1-2. CHASSIS ASSEMBLY REMOVAL
(KV-21FA540
PICTURED)
Chassis Assembly
Claw
CV Board
1 Lift to remove Subwoofer
from top of Rear Cover.
2 Remove screws from back of cover.
5 Screws SCREW +BVTP 3X12 TYPE2 TT (B)
1
Screw +BVTP 4X16 TYPE2 IT-3
3 Remove screws from sides of cover.
3 SCREW +BVTP 4X16 TYPE2 IT-3 each side
(KV-29FA340/29FA540 Only)
(KV-29FA340/29FA540 Only)
2
SCREW +BVTP 4X16 TYPE2 IT-3 each side
(KV-21FA340/21FA540 Only)
4 Remove screws from top of cover.
4 SCREW +BVTP 4X16 TYPE2 IT-3
(KV-29FA340/29FA540 Only)
(KV-29FA340/29FA540 Only)
2
SCREW +BVTP 4X16 TYPE2 IT-3
(KV-21FA340/21FA540 Only)
5 Remove rear cover
2
1
3
4
5
KV-21FA340/21FA540/29FA340/29FA540
KV-21FA340/21FA540/29FA340/29FA540
11
1-3. SERVICE POSITION
(KV-21FA540
SHOWN)
1 Disconnect the CN501 cable from the A Board.
2 Press on catch tab to release A Board.
3 Gently pull the K1 or K2 Board and the A Board forward to access the HC Board.
4 Disconnect the speaker cable from the HC Board.
5 Gently continuing pulling the A Board and HC Board forward to place in
service position.
6 Reconnect CN501 and speaker cables
A Board
CV Board
HC Board
K1 Board (KV-21FA540/29FA540 Only)
K2 Board (KV-21FA340/29FA340 Only)
K2 Board (KV-21FA340/29FA340 Only)
KV-21FA340/21FA540/29FA340/29FA540
KV-21FA340/21FA540/29FA340/29FA540
12
1. Discharge the anode of the CRT and remove the
anode cap.
2. Unplug all interconnecting leads from the
defl ection yoke, neck assembly, degaussing coils
and CRT grounding strap.
and CRT grounding strap.
3. Remove the CV Board from the CRT.
4. Remove the chassis assembly.
5. Loosen the neck assembly fi xing screw and
remove.
6. Loosen the defl ection yoke fi xing screw and
remove.
7. Place the set with the CRT face down on a
cushion and remove the degaussing coil holders.
8. Remove the degaussing coils.
9. Remove the CRT grounding strap and spring
tension devices.
10. Unscrew the four CRT fi xing screws [located on
each CRT corner] and remove the CRT [Take
care not to handle the CRT by the neck].
care not to handle the CRT by the neck].
1-4. PICTURE TUBE REMOVAL
WARNING: BEFORE REMOVING THE ANODE CAP
High voltage remains in the CRT even after the power is disconnected. To avoid electric shock,
discharge CRT before attempting to remove the anode cap. Short between anode and CRT
coated earth ground strap.
High voltage remains in the CRT even after the power is disconnected. To avoid electric shock,
discharge CRT before attempting to remove the anode cap. Short between anode and CRT
coated earth ground strap.
ANODE CAP REMOVAL PROCEDURE
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to
remove the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon
painted on the CRT.
remove the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon
painted on the CRT.
REMOVAL PROCEDURES
HOW TO HANDLE AN ANODE CAP
1. Do not use sharp objects which may cause damage to the surface of the anode
cap.
2. To avoid damaging the anode cap, do not squeeze the rubber covering too
hard. A material fi tting called a shatter-hook terminal is built into the rubber.
3. Do not force turn the foot of the rubber cover. This may cause the shatter-hook
terminal to protrude and damage the rubber.
Turn up one side of the rubber cap in
the direction indicated by arrow a .
the direction indicated by arrow a .
Use your thumb to pull the rubber
cap fi rmly in the direction indicated
by arrow b .
cap fi rmly in the direction indicated
by arrow b .
When one side of the rubber cap separates from
the anode button, the anode cap can be removed
by turning the rubber cap and pulling it in the
direction of arrow c .
the anode button, the anode cap can be removed
by turning the rubber cap and pulling it in the
direction of arrow c .
a
b
Anode Button
c
4
6
8
10
7
3
1
9
5
2
13
KV-21FA340/21FA540/29FA340/29FA540
KV-21FA340/21FA540/29FA340/29FA540
☛
KV-21FA340/21FA540 MODELS ONLY
CABLE WIRE DRESSING
Dress right speaker wire using a purse lock (4-
072-499-12) as picture shown.
072-499-12) as picture shown.
REV 1.5
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