Sony KV-20S90 Service Manual ▷ View online
— 21 —
KV-20S90 / 21SE43C
5-2. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM INFORMATION
SCHEMATIC DIAGRAM INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less
are not indicated except for electrolytics and tantalums.
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specifi ed.
All resistors are in ohms. K=1000, M=1000k
Indication of resistance, which does not have one for rating electrical
power, is as follows:
power, is as follows:
Pitch : 5mm
Rating electrical power :
1
/
4
W
1
/
4
W in resistance,
1
/
10
W and
1
/
8
W in chip resistance.
: nonfl ammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibillity.
: B+line.
: B-line. (Actual measured value may be different).
: signal path. (RF)
5-1. CIRCUIT BOARDS LOCATION
The components identifi ed by shading and
!
symbol are critical for safety. Replace
only with part number specifi ed.
The symbol
indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
Les composants identifi es per un trame et une marque
!
sont critiques pour la
securite. Ne les remplacer que par une piece portant le numero specifi e.
Le symbole
indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
Circled numbers are waveform references.
The components identifi ed by X in this basic schematic diagram have
been carefully factory-selected for each set in order to satisfy regulations
regarding X-ray radiation. Should replacement be necessary, replace
only with the value originally used.
been carefully factory-selected for each set in order to satisfy regulations
regarding X-ray radiation. Should replacement be necessary, replace
only with the value originally used.
When replacing components identifi ed by Y, make the necessary
adjustments as indicated. If the results do not meet the specifi ed value,
change the component identifi ed by X and repeat the adjustment until
the specifi ed value is achieved. (Refer to Safety Related Adjustments
on Page 14.)
adjustments as indicated. If the results do not meet the specifi ed value,
change the component identifi ed by X and repeat the adjustment until
the specifi ed value is achieved. (Refer to Safety Related Adjustments
on Page 14.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
perform the related adjustments.
REFERENCE INFORMATION
RESISTOR : RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
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
CAPACITOR : TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
SECTION 5: DIAGRAMS
A Board
C Board
Part Replaced ( )
Adjustment ( )
DY, C511, C574, C575, D572,
D573, D574, R582, R583, R584,
R585, R586, R578, R625, R626,
R640, R635,T504, IC301, IC521,
IC602.............................A Board
D573, D574, R582, R583, R584,
R585, R586, R578, R625, R626,
R640, R635,T504, IC301, IC521,
IC602.............................A Board
HV HOLD-DOWN
R582
R582
KV-20S90 / 21SE43C
— 22 —
5-3. BLOCK DIAGRAM AND SCHEMATICS
BLOCK DIAGRAM
O-ADJ
I-DSC
O-DSC
4
HD
HP/PROTECT
PWM-DC/VOLUME
REF
BOOST
OUT
5
D573
+B
2
3
4
5
7
8
9
10
11
12
14
15
13
1
2
4
3
1
3
4
5
6
8
9
2
10
11
V
L
R
V
L
R
S005
S004
S003
S002
S006
S007
S001
R660
PH600
T604
T603
J201
J202
PC123FY2
3P
3P
5
6
3
1
2
1
2
1
6
5
7
1
KR
KG
KB
2
1
DY ASSY
TUNING CONTROL,
Y/C/J
POWER SUPPLY,DEFLECTION,
H
G2
FV
HV
IC004
DETECTOR
TUNER/IF,AUDIO,MTS
{
}
4
3
2
1
VIDEO OUT
RF AGC
DAT
CLOCK
MUTE
VCC 5V
VCC 9V
VCC 30V
TU101
AFT OUT
BLOCK
ANTENNA
+30V
+5V
+9V
+9V
Q252
AGC
REAR A/V
(INPUT)
(INPUT)
VIDEO
AUDIO
VIDEO
AUDIO
(INPUT)
FRONT A/V
B-DAT
B-CLK
B-CLK
IC003
MEMORY
NVM 1K BIT
TO V1-L
TO V2-L
B CLK
B DAT
B INT
B DAT
B INT
CN203
POWER
TV/VIDEO
CHANNEL+
CHANNEL-
VOLUME+
VOLUME-
DEMO
AC
IN
DGC
DGC
CN601
CN602
F601
T601
STAND-BY/TIMER
D002
+12V
RY601
CONTROL
TUNING SYSTEM
IC001
CLOSED CAPTION
I-KEY
I-POWERN
I-RMCN
O-DGC
O-RELAY
I-RESET
I-PROT
I-VPN
O-OSDBLK
O-B
O-G
O-R
I-HP
IO-SDAT
O-MUTE
I-HSYNC
I-CVIN
O-VO
O-V1
I-AFT
O-BCLKN
IO-BDAT
I-BINTN
IO-BDAT
I-BINTN
I-AVCC
O-LED
O-VOL
O-AGC
IO-SCLKN
38
36
36
10
33
14
12
18
31
11
TO S1
TO S2
37
39
34
7
1
52
51
50
51
50
49
2
30
24
25
19
17
5
16
22
3
6
13
+7.5V
RY602
AC RECT
D601
IC601
CF001
8MHZ
Q608
Q607
PIT
POWER
CONTROL
IC602
D636
7.5V RECT
D615
+B RECT
D616
AUDIO VCC
D617
12V RECT
AUDIO VCC
+B
12V
9V-REG
SET +9V
STANDBY
+5V
STBY +5V
REG.
IC002
Q605
SET 7.5V
6
1
8
T501
Q501
H DRIVE
HP
Q300
H COMP
Q602
HP/PROT
Q002,003
Y.CHROMA.JUNGLE
MONOUT
IC301
CVBS2/Y2
CVBS1/Y1
TV/C2
R2IN
G2IN
B2IN
G2IN
B2IN
YS2/YM
VTIM
VD-
VD+
R OUT
G OUT
B OUT
IK IN
SCL
SDA
ABL IN
6
41
4
43
32
31
30
29
30
29
5
34
35
19
14
13
18
21
24
23
22
3
BUFFER
Q305,391
BUFFER
Q390
SW
Q203
Q001
VIDEO
BUFFER
Q205
H.SYNC.
SEP.
IC201
AUDIO SWITCH
S1
V1-L
S2
V2-L
1
2
3
4
5
7
AUDIO OUT
IC401
3
5
5
7
1
13
11
10
8
BUFFER
Q394
BUFFER
BUFFER
Q393
Q392
IK-BUFFER
Q301,302
V.OUT
IC541
IC541
DRIVER-
DRIVER+
1
7
3
6
V. BOOST
D502
+13V
V OUT
CN501
TP508
V DRIVE
+B
D502
H OUT
TP506
Q502
H OUT
H DRIVE
SWITCH
D581
SWITCH
D507
Q571
OCP
V.CONTROL HOLD
IC521
HOLD DOWN
REF.
H-PROT
TP503
+180V
TP504
+180V
RECT
D552
-13V
H-PROTECT
D574
TP501
TP502
+13V
115V
2
1
8
7
9
4
T504
FBT
ABL
HEATER
CN502
G2
FV
HV
PICTURE TUBE
20NX
CN1754
CRT DRIVE
V DY(+)
V DY(-)
H DY(-)
H DY(+)
TP507
V MID
CN301
CN401
CN402
SP902
SPEAKER
HEADPHONE
SPEAKER
J400
SP901
(R)
(L)
CN1752
B
G
R
IK
4
3
2
1
4 B
3 G
2 R
1 IK
1
2
3
5
7
8
9
CRT AMP
IC1751
B IN
G IN
R IN
VIP
REFERENCE
IK
R OUT
G OUT
B OUT
BA4D-905-BD
5
6
11
G2
FV
HV
6
-13V
RECT
D561
RECT
+13V
D562
STBY
+5V
6
5
4
3
2
2
1
2
1
1
2
BUFFER
Q303
+B
Q601
DGC RELAY
RELAY DRIVER
Q606,670
5V REG
Q650
BUFFER
Q556
20
AFCFIL
AUDIO SWITCH
S1
S2
1
2
3
4
5
7
IC202
V1-R
V2-R
L OUT
R OUT
TO V1-R
TO V2-R
+9V
+5V
RGB DRIVE
— 24 —
KV-20S90 / 21SE43C
(*) A BOARD VARIANT MODEL LIST
REF. NO.
LOCATION
KV-20S90
KV-21SE43C
C604
N-2
4700pF 250V
2200pF 250V
C605
N-3
4700pF 250V
2200pF 250V
C613
M-2
470µF 250V
330µF 400V
C616
N-3
#
0.022µF 400V
C617
N-3
#
220PF 1KV
C638
N-1
0.47µF 125V
#
D609
N-3
#
RU-1P
F601
O-1
1-533-795-11
1-532-506-51
IC601
N-3
STR-F6424
STR-F6454
R268
C-19
3.3K
4.7K
R269
D-19
3.3K
4.7K
R651
N-2
4.7M 1/2W 8.2M 1W
R652
N-1
#
1.8 10W
R658
N-3
#
100K 3W
R664
M-2
390K
270K
R698
M-2
#
270K
T603
M-5
1-433-816-11
1-433-817-11
THP601
O-2
1-810-597-11
1-809-827-11
VDR601
O-1
ENE271D-10A
ENE471D-14A
NOTE: # = Not Mounted
6
8
10
12
14
13
15
4
7
3
11
2
5
9
A BOARD WAVEFORMS
1
4.9 Vp-p (H)
3.6 Vp-p (8MHz)
1.0 Vp-p (H)
4.2 Vp-p (H)
8.6 Vp-p (V)
1.4 Vp-p (V)
2.0 Vp-p (8 MHz)
1.4 Vp-p (V)
3.0 Vp-p (H)
2.7 Vp-p (H)
3.4 Vp-p (H)
4.5 Vp-p (V)
1.3K Vp-p (H)
25.0 Vp-p (H)
91.3 KVp-p (H)
2.8 Vp-p (H)
30.3 Vp-p (V)
53.4 Vp-p (V)
29.4 Vp-p (V)
17
18
19
16
20
21
6.1 Vp-p (V)
110.5 Vp-p (H)
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