TABLE
OF
CONTENTS
Section
Title
Page
Section
Title
Page
1.
GENERAL
4.
CIRCUIT
ADJUSTMENTS
1-1.
TV
Channel
Presetting
--:--ersereereeeeeeeeeseeeeeeeeeeeseeoes
4
4-1.
A
Board
Adjustments
---+-+++e-eeseereeee
eter
seer
eeeee
ecco
eees
25
1-2.
Basic
FUNCTIONS
s+orreeeeeeseseceeeseceeescceenssceencceesseeres
6
4-2,
B1
Board
Adjustments
25
1-3.
Special
FUNCtIONS:
ss
tec
teen
cereccenececceenncccceenecenaccceses
6
4-3.
D
Board
Adjustments
Ove
e
eet
e
er
eeeesccanncrves
26
1-4,
Use
of
the
Teletext
Service
-++---+eeecereeeteeeteereee
tones
7
4-4.
J1
Board
Adjustments
27
1-5.
Connections
and
Optional
Functions
cerrereserrcccecceeeee
9
4-5.
V
Board
Adjustments
Seema
e
merece
mene
ere
ences
eeeereseeeereucces
27
1-6.
General
Information
sseesessesceececcccccccceseccccssescesscce
10
4-6.
Secondary
Adjustments
Oem
e
ence
cee
ceca
sens
eneeteeneconennees
28
2.
DISASSEMBLY
5.
DIAGRAMS
2-1-1,
Rear
Cover
Removal
(21
inch)
<srrssssessseseseeeseeeeeeeees
12
5-1.
Block
Diagram-srrsssesseeeesesceeeesseeneeseeaerceeerenenereoes
29
2-1-2.
Rear
Cover
Removal
(25
inch,
29
inch)+:++++++++++++++86+
12
5-2.
Circuit
Boards
Location
-++++++ss++seeeeeeseeeeeeeeneeeeeereres
33
2-2,
Chassis
Assembly
Removal
«-:sssssereesrserrreeeseeeeereces
12
5-3.
Printed
Wiring
Boards
and
Schematic
Diagrams
--:-+--
33
2-3,
A
and
J1
Boards
Removal
-ccecrsecsccceetecctcseeceeseeenee
13
5-4.
S@MICONAUCHOIS:++11e
rte
seeeeteeseneeeseteetecnnesecesesveroens
65
2-4,
B1
and
V
Boards
Removal
«+s+s:essssereeescsceecsceceseenes
13
2-5,
Service
Position::::+reseerssseeeeseecsseececsececsenecensseceees
13
2-6-1.
Picture
Tube
Removal
(21
inch)
+++-+ss+eeeeeseeeeeeeeeeees
14
«6.
EXPLODED
VIEWS
2-6-2.
Picture
Tube
Removal
(25
inch,
29
inch)
-++++++++r+++++++
15
6-1.
Chassis
(KV-A2121D)
:ccccsesseeseesssteneeneeeersessuerioees
67
6-2,
Picture
Tube
(KV-A2121D)--c-ceresteesssreeseeeeeeenersre
aes
68
3.
SET-UP
ADJUSTMENTS
6-3.
Chassis
(KV-A2522D/A2921D)
«--e+ssesesereeseseseese
ees
69
6-4,
—_
Picture
Tube
(KV-A2522D/A2921D)
---1+++s+eeerre
eects
eee
70
(21
inch,
25
inch)
3-1.
Beam
Landing
16
3-2.
Convergence
::---
7
7.
ELECTRICAL
PARTS
LIST
--+s-+-reeseeeseeerees
a
3-3.
FOCUS
«eeccceccccccenecccccsncccesennescenneeesseneeseesensseensases
19
3-4.
Screen
(G2)
and
White
Balance
-++++++++++++seseeeeeeeeeeee
19
(29
inch)
3-1.
21
3-2.
22
3-3.
24
3-4,
24
(CAUTION)
SHORT
CIRCUIT
THE
ANODE
OF
THE
PICTURE
TUBE
AND
THE
ANODE
CAP
TOTHE
METAL
CHASSIS,
CRT
SHIELD,
OR
CARBON
PAINTED
ON
THE
CRT,
AFTER
REMOVING
THE
ANODE.
WARNING!!
AN
ISOLATION
TRANSFORMER
SHOULD
BE
USED
DURING
ANY
SERVICE
TO
AVOID
POSSIBLE
SHOCK
HAZARD,
BECAUSE
OF
LIVE
CHASSIS.
THE
CHASSIS
OF
THIS
RECEIVER
IS
DIRECTLY
CONNECTED
TO
THE
AC
POWER
LINE.
SAFETY-RELATED
COMPONENT
WARNING
!!
COMPONENTS
IDENTIFIED
BY
SHADING
AND
MARK
A
ON
THE
SCHEMATIC
DIAGRAMS,
EXPLODED
VIEWS
AND
INTHE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUBLISHED
BY
SONY.
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