DOWNLOAD Sony KV-28EW20B Service Manual ↓ Size: 5.39 MB | Pages: 55 in PDF or view online for FREE

Model
KV-28EW20B
Pages
55
Size
5.39 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-28ew20b.pdf
Date
PREV: Sony KD-36NX200E (serv.man2) Service Manual

Sony KV-28EW20B Service Manual ▷ View online

- 26 -
5-1.  BLOCK DIAGRAMS (2)
H1
PICTURE  TUBE
CN703
R
G
B
IK
TO A BOARD
T511 (FBT)
H
R
C
V
R
G
B
H
V
RCV
G2
G
4
G
2
TO A BOARD
CN003
1
2
3
6
+8V
1
3
CN1801
ROT -
ROT +
+
-
IC1801
ROTATION AMP
6
7
5
+
-
2
6
3
TO
ROTATION
COIL
NS CORRECT
7
C (    )
RGB OUT
3
1
5
2
R IN
G IN
B IN
IK
7
9
8
KR
KG
KB
IC701
1
5
6
2
CN2802
D3 (      )
4:3 SWITCHING
SWITCH
Q2801
SWITCH
RY2801
3
4
1
CN2801
TO A BOARD
CN501
1
5
6
2
CN2803
3
4
T2801
SW
TO D2 BOARD
CN8802
V DY
V- DY+
DY ASSY
H DY
H- DY+
H- DY-
V- DY-
H-DY+
H-DY+
H-DY-
H-DY-
V-DY-
V-DY+
H-DY+
H-DY+
H-DY-
H-DY-
V-DY-
V-DY+
6
7
2
IC7150
RECEIVER
2
1
LED
TO A BOARD
CN405
H8 (       )
LED AND SIRCS
RESPONSE
CN7150
SIRCS
+5V STBY
STBY 5V
CN8802
TO A BOARD
CN512
HDY-
IC8801
SMART MODE
DEFLECTION
8
2
1
6
SWITCH
Q8802
1
2
4
3
SWITCH
Q8801
3
1
SMART CORR
SWITCH
SWITCH
8V
8V
CN8801
TO D3 BOARD
CN2801
D2 (       )
SMART MODE
DEFLECTION
F3 (       )
AC INPUT,
FUSE
CN3601
LINE FILTER
T3602
1
2
1
2
CN3603
TO F6 BOARD
CN7602
POWER
CN7602
2
1
2
1
TO F3 BOARD
CN3603
CN7601
F6 (       )
POWER SWITCH
TO A BOARD
CN606
S7601
TO A BOARD
CN406
TO A BOARD
CN1200
FUNCTION
SWITCH
S900-S902
VIDEO
HEADPHONES
R
L
KEY
AUDIO L OUT
CN908
AUDIO L IN
AUDIO R IN
AUDIO R OUT
CN906
AUDIO L
AUDIO R
Y/CVBS
C
5
6
2
3
6
9
4
2
1
2
4
3
Y/C
J901
1
H2(         )
AUDIO IN,
Y/C IN, HEADPHONE IN
J900
1
WOOFER MUTE
9
NECK ASSY
CN1718
Q.P.
TO
A BOARD
CN510
QP OUT
Q1841
1
2
3
4
Q.P.+
Q.P.-
7
2
IC1902
DF/DQP/TIMING
+
-
3
1
2
+
-
5
7
6
+9V
IC1901
COMPARATOR
CN1809
1
DF
VM (            )
DYNAMIC FOCUS AND DQP
CN1701
7
- 27 -
5-2.  CIRCUIT BOARD LOCATION
5-3.  SCHEMATIC DIAGRAMS AND 
         PRINTED WIRING BOARDS
Note :
•
All capacitors are in µF unless otherwise noted.
•
pF : µµF 50WV or less are not indicated except for 
electrolytic types.
•
Indication of resistance, which does not have one for 
rating electrical power, is as follows.
Pitch : 5mm
Electrical power rating : 1/4W
•
Chip resistors are 1/10W
•
All resistors are in ohms.
k = 1000 ohms, M = 1000,000 ohms
•
: nonflammable resistor.
•
: fusible resistor.
•
: internal component.
•
: panel designation or adjustment for repair.
•
All variable and adjustable resistors have 
characteristic curve B, unless otherwise noted.
•
All voltages are in Volts.
•
Readings are taken with a 10Mohm digital mutimeter.
•
Readings are taken with a color bar input signal.
•
Voltage variations may be noted due to normal production
tolerences.
•
:  B  +  bus.
•
: B - bus.
•
: RF signal path.
•
: earth - ground.
•
: earth - chassis.
Reference Information
RESISTOR
RN
: METAL FILM
RC
: SOLID
FPRD
: NON FLAMMABLE CARBON
FUSE
: NON FLAMMABLE FUSIBLE
RS
: NON FLAMMABLE METAL OXIDE
RB
: NON FLAMMABLE CEMENT
RW
: NON FLAMMABLE WIREWOUND
: ADJUSTMENT RESISTOR
COIL
LF-8L
: MICRO INDUCTOR
CAPACITOR
TA
: TANTALUM
PS
: STYROL
PP
: POLYPROPYLENE
PT
: MYLAR
MPS
: METALIZED POLYESTER
MPP
: METALIZED POLYPROPYLENE
ALB
: BIPOLAR
ALT
: HIGH TEMPERATURE
ALR
: HIGH RIPPLE
Les composants identifiés par une trame et
par une marque      sont d'une importance
critique pour la sécurité. Ne les remplacer
que par des pièces de numéro spécifié.
specified.
Note :
The components identified by shading
and marked      are critical for safety.
Replace only with the part numbers 
specified in the parts list.
Note :
CVM Board
A Board
S1 Board
VM
C
H
D1
A
J
A2
N
D
A1
D2
C
A
VM Board
C Board
A Board
H2 Board
F3 Board
D3 Board
H8 Board
F6 Board
D2 Board
- 28 -
~
A Board IC Voltage Table
~
~
A Board Semiconductor Voltage Table ~
o
N
f
e
R
o
N
n
i
P
)
V
(
e
g
a
t
l
o
V
o
N
f
e
R
o
N
n
i
P
)
V
(
e
g
a
t
l
o
V
1
0
0
C
I
1
0
1
0
0
C
I
7
6
8
.
4
2
2
.
3
8
6
4
.
0
3
9
.
2
9
6
0
5
0
0
7
0
6
0
.
2
1
7
0
8
3
.
2
2
7
0
9
0
.
8
3
7
1
.
7
0
1
0
.
5
4
7
0
.
5
2
1
0
5
7
1
.
8
3
1
0
6
7
5
.
3
-
4
1
0
.
4
7
7
0
6
1
4
.
1
8
7
2
.
3
7
1
5
.
1
9
7
2
.
3
8
1
0
0
8
0
9
1
0
1
0
5
C
I
1
3
.
0
0
2
8
.
3
3
6
.
2
1
-
1
2
8
.
3
5
2
.
0
2
2
0
.
5
6
9
.
3
1
6
2
0
7
3
.
0
8
2
5
.
3
1
3
5
C
I
1
4
.
1
9
2
6
.
3
2
3
.
2
0
3
9
.
1
3
8
.
1
1
3
3
.
0
5
4
.
2
2
3
6
.
3
6
6
.
1
4
3
9
.
1
7
4
.
6
5
3
4
.
1
1
0
6
C
I
1
4
.
0
8
-
6
3
9
.
3
2
5
.
0
8
-
8
3
8
.
1
3
2
.
0
8
-
0
4
3
.
3
4
2
.
0
8
-
2
4
3
.
3
5
5
.
1
8
-
3
4
4
.
1
6
6
.
1
8
-
5
4
0
7
8
.
7
7
-
6
4
0
9
8
.
1
8
-
7
4
6
.
3
0
1
6
7
-
8
4
8
.
2
1
1
9
.
1
8
-
9
4
3
.
2
2
1
4
.
9
7
-
0
5
2
.
0
4
1
5
.
6
1
1
5
5
.
2
5
1
1
1
2
5
5
.
2
6
1
4
.
4
1
3
5
5
.
2
8
1
4
.
6
8
4
5
1
.
2
1
0
2
1
C
I
1
1
1
5
5
2
.
5
3
9
.
4
6
5
0
.
3
5
0
7
5
1
.
3
6
0
8
5
1
.
3
7
3
.
1
1
9
5
2
.
3
9
3
.
0
2
6
0
0
1
0
3
6
0
2
1
0
4
6
0
4
1
5
3
.
1
1
5
6
0
f
e
R
)
e
(
)
b
(
)
c
(
f
e
R
)
e
(
)
b
(
)
c
(
3
1
0
Q
0
7
.
0
0
4
0
6
Q
0
0
5
.
2
6
1
0
Q
0
0
3
.
3
8
0
6
Q
0
0
6
.
5
2
1
2
Q
0
7
.
0
0
9
0
6
Q
6
.
5
6
.
5
0
1
0
4
Q
8
.
4
2
.
4
8
.
1
1
1
4
Q
1
.
1
7
.
1
2
.
4
f
e
R
)
s
(
)
g
(
)
d
(
1
0
6
Q
6
.
5
8
.
4
3
.
5
6
0
6
Q
9
.
0
1
5
.
4
1
7
.
6
8
2
0
6
Q
2
.
4
1
1
.
5
8
7
0
6
Q
4
.
2
8
-
9
.
9
7
-
9
.
0
1
3
0
6
Q
8
8
0
5
3
5
Q
0
5
.
2
2
.
5
9
1.83 Vp-p (V)
20us/div
TP7
20us/div
1.88 Vp-p (H)
TP1
5ms/div
TP8
488 mVp-p (V)
20us/div
1.86 Vp-p (H)
TP3
20us/div
1.84 Vp-p (H)
TP2
20us/div
6.0 Vp-p (H)
TP4
20us/div
5.4 Vp-p (H)
TP5
20us/div
TP6
16.8 Vp-p (H)
5ms/div
50.8 Vp-p (V)
TP11
5ms/div
49.8 Vp-p (V)
TP9
20us/div
TP10
1.06 kVp-p (H)
~
A Board Waveforms ~
f
e
R
B
0
2
W
E
8
2
-
V
K
E
0
2
W
E
8
2
-
V
K
U
0
2
W
E
8
2
-
V
K
1
0
1
U
T
4
1
-
5
5
5
-
3
9
6
-
1
4
1
-
6
5
5
-
3
9
6
-
1
4
1
-
7
5
5
-
3
9
6
-
1
~
A Board Difference Table ~
- 29 -
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
O
P
Q
R
S
T
U
V
W
12
13
14
15
16
~ A Board Schematic Diagram [ Power Supply, Deflection, Small  Signal Board, Audio Amp ] page 1/2 ~
H8
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