AV-21L31B
AV-25L31B
SCHEMATIC DIAGRAMS
COLOR TELEVISION
BASIC CHASSIS
CH
AV-21L31B
AV-25L31B
CD-ROM No. SML200110
POWER
DISPLAY
MENU
BASS
CHANNEL VOLUME
CLOSED
MUTING
CAPTION
TV/VIDEO
123
456
PICTURE MODE
7809
CHANNEL SCAN
RETURN
100
OFF TIMER
ECO SENSOR
RM-C249 REMOTE CONTROL UNIT
RM-C249-2C
(-PH)
(-PH)
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No. 51905
Sep. 2001
AV-21L31B(-PH)
AV-25L31B(-PH)
STANDARD CIRCUIT DIAGRAM
q
NOTE ON USING CIRCUIT DIAGRAMS
1. SAFETY
The components identified by the symbol and shading are
critical for safety. For continued safety replace safety critical
components only with manufactures recommended parts.
2. SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
following conditions.
(1) Input signal : Color bar signal
(2)
Setting positions of each knob/button and variable resistor
: Original setting position when
shipped
(3) Internal resistance of tester : DC 20kØ/V
(4) Oscilloscope sweeping time : H ⇒ 20µS/div
:V ⇒ 5mS/div
: Others ⇒ Sweeping time is
specified.
(5) Voltage values : All DC voltage values
9Since the voltage values of signal circuit vary to some extent ac-
cording to adjustments, use them as reference values.
3. INDICATION OF PARTS SYMBOL [EXAMPLE]
• In the PW board : R1209
→
R209
Type
•
No indication : Ceramic capacitor
MY : Mylar capacitor
MM : Metalized mylar capacitor
PP : Polypropylene capacitor
MPP : Metalized polypropylene capacitor
MF : Metalized film capacitor
TF : Thin film capacitor
BP : Bipolar electrolytic capacitor
TAN : Tantalum capacitor
(3) Coils
No unit : [µH]
Others : As specified
(4) Power Supply
9Respective voltage values are indicated
(5) Test point
AV-21L31B
AV-25L31B
:B1
: B2(12V)
:9V
:5V
: Test point
: Only test point display
4. INDICATIONS ON THE CIRCUIT DIAGRAM
(1) Resistors
Resistance value
•
No unit : [Ø]
k:[kØ]
M:[MØ]
Rated allowable power
•
No indication : 1/16 [W]
Others : As specified
Type
•
No indication : Carbon resistor
OMR : Oxide metal film resistor
MFR : Metal film resistor
MPR : Metal plate resistor
UNFR : Non-Flammable resistor
FR : Fusible resistor
9Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2) Capacitors
Capacitance value
•
1 or higher : [pF]
less than 1 : [µF]
Withstand voltage
•
No indication : DC50[V]
AC indicated : AC withstand voltage [V]
Others : DC withstand voltage [V]
9 Electrolytic Capacitors
47/50[Example] : Capacitance value [µF]/withstand voltage[V]
(6) Connecting method
: Connector
: Wrapping or soldering
: Receptacle
(7) Ground symbol
: LIVE side ground
: ISOLATED(NEUTRAL) side ground
: EARTH ground
: DIGITAL ground
5. NOTE FOR REPAIRING SERVICE
This model’s power circuit is partly different in the GND. The difference
of the GND is shown by the LIVE : ( ) side GND and the
ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be taken
for the following points.
(1) Do not touch the LIVE side GND or the LIVE side GND and the
ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore,
make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out.
(2) Do not short between the LIVE side GND and ISOLATED(NEUTRAL)
side GND or never measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side
GND at the same time. If the above precaution is not respected , a
fuse or any parts will be broken.
Since the circuit diagram is a standard one, the circuit and cir-
•
cuit constants may be subject to change for improvement without any notice.
Sep. 2001 No. 51905
AV-21L31B
AV-25L31B
CONTENTS
SEMICONDUCTOR SHAPES............................................................................................................................ 2-2
BLOCK DIAGRAM ...................................................................................................................................................... 2-3
CIRCUIT DIAGRAMS................................................................................................................................................2-5
MAIN PWB CIRCUIT DIAGRAM (1/2)
MAIN (2/2) AND CRT SOCKET PWB CIRCUT DIAGRAMS
PATTERN DIAGRAMS ............................................................................................................................................. 2-9
MAIN PWB PATTERN
CRT SOCKET PWB PATTERN
...................................................................................................................................................... 2-9
.................................................................................................................................. 2-11
....................................................................................................................... 2-5
............................................................................. 2-7
SEMICONDUCTOR SHAPES
TRANSISTOR
E
C
B
ECB
IC
OUT
E
IN
IN E OUT
CHIP IC
N
N
EC
B
(G)(D)(S)
ECB
1N
TOP VIEW
1
ECB
1N
TOP VIEWBOTTOM VIEW FRONT VIEW
CHIP TR
C
B
E
TOP VIEWBOTTOM VIEW FRONT VIEW
1N
N
1
N
2-2 No.51905
N
BLOCK DIAGRAM
AV-21L31B AV-21L31B
AV-25L31B AV-25L31B
J801
VIDEO-1
INPUT
J802,J803
COMPONENT
(VIDEO-2)
INPUT
J804
OUTPUT
J771-J773
FRONT IN
(VIDEO-3)
AC IN
TU001
TUNER
VIDEO
AUDIO L/MONO
AUDIO R
V/Y
CB
CR
AUDIO L/MONO
AUDIO R
VIDEO OUT
AUDIO L
AUDIO R
VIDEO
AUDIO L/MONO
AUDIO R
VOL+
SCL
SDA
IF
7
V1-V
8
V1-L
10
V1-R
3
V2-Y
IC801
VIDEO SW
2
V2-L
4
V2-R
37
Vout2
36
Lout2
35
Rout2
43
V3-V
44
L3-L
42
L3-R
19
Yin1
VOL- CH+ CH- MENU
REMOCON
RECEIVER
S901
POWER SW
POWER
LED
F901
SCL
SDA
COUT1
YOUT1
MTV-V
MTV-R
MTV-L
Lout1
Rout1
Vout1
FILTER
FILTER
SF101
SF102
29,30
25
27
13
15
14
26
24
23
28
SIF IN1
29
SIF IN2
23
IF IN1
24
IF IN2
43
42
47
48
46
PROCESSOR
SCL,SDA
SCL1
SDA1
CIN
CVBS/YIN
Y
U
V
D901
RECT
2,3
62,63
IC702
EEPROM
CB
CR
Q111 Q109
BUF
5,6
CF106
TRAP
Rout1
Lout1
REMOTE, LED
KEY_IN
IC701
V/C DEF.
QSS OUT
7
IC901
POWER
REG
ROUT
GOUT
BOUT
VDRB(-)
VDRA(+)
HOUT
IF VOUT
10
64
BUF
VOLTAGE
FEEDBACK
51
52
53
35
21,22
33
38
T901
SW
TRANSF.
PC901
IC951
ERROR
AMP
SCL
SDA
32
1
IC972
3.3V REG
IC974
REG
L951
R
G
B
Q150
BUF
IC602
SOUND
PROCESSOR
IC401
VERT OUT
Q522
H. OUT
Lout1
Rout1
20
12
19
3.3V_STB
5V
8V
9V
32V
MAIN PWB
2
SCL
SDA
40
41
L, R
L
R
BASS
12
IC850
OP AMP
IC601
MULTI SOUND
PROCESSOR
9
3
4
8
30,31
IC650
AUDIO AMP
20
13
23
CRT SOCKET PWB
2
3
1
IC351
VIDEO AMP
J774
BASS SPEAKER
OUT
J770
HEADPHONE
JACK
8
7
9
SP
L
SP
R
V
V01
DY01
DEF YOKE
H
FOCUS1
B1
T551
SCREEN
FBT
EHV
No.51905 2-3 2-4 No.51905
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAMS(1/2
TO
SPEAKER
FRONT INPUT
(
)
VIDEO-3
VIDEO-1
INPUT
COMPONENT
(
)
VIDEO-2
INPUT
OUTPUT
R885
R884
IC801
1.2Vp-p(H
IC801
2.2Vp-p(H
IC801
2.1Vp-p(H
IC801
2.2Vp-p(H
DIFFERENCE LIST(PARTS
SCH-1022A-H2
SCH-1023A-H2
AV-21L31B
AV-25L31B
AV-21L31B
AV-25L31B
)
BASS
SPEAKER OUT
0V
0V
5.0V
4.9V
4.3V
4.9V
4.4V
4.9V
5.3V
4.3V
4.4V
7.0V
R804
D806
D807
9.0V
5.0V
4.4V
5.9V
4.9V
4.3V
4.3V
5.7V
4.9V
2.6V
2.1V
4.4V
4.9V
4.3V
9.0V
9.0V
4.4V
5.0V
4.2V
4.2V
4.3V
4.3V
1.7V
1.9V
1.7V
4.1V
4.2V
3.4V
4.2V
5.1V
2.3V
3.0V
2.4V
2.6V
1.9V
4.2V
1.9V
2.6V
2.6V
8.3V
7.4V
0V
3.7V
3.7V
3.7V
3.7V
0.1V
3.7V
0V
5.0V
0.2
V
5.0V
0V
7
)
23
)
27
)
4.6V
AUDIO MUTE
0V
-0.4V
0V
-1.0V
5.0V
0V
-0.4V
0V
0V
0.6V
37
)
0V
0V
MAIN PWB ASS’Y(1/2
)
SCH-1022A-H2(AV-21L31B-PH
SCH-1023A-H2(AV-25L31B-PH
)
)
0.6V
)
R749R748
2.7M
2.2M
2.2M
1.8M
2-5 2-6No.51905 No.51905
0V
0V
2.9V
2.9V
2.4V
2.4V
1.5V
2.7V
4.8V
5.0
V
5.0V
3.3V
5.0V
2.7V
3.3V
0V
0V
5.0V
33.8V
5.0V
5.0V
1.7V
1.9V
5.0V
TO CRT SOCKET
PWB CN10T
3.3V
3.3V
3.3V
5.0 5.0
V
V
1.8V
1.6V
3.3V
3.3V
AUDIO MUTE
5.0
2.8
3.3V
0V
V
V
AUDIO MUTE
1.5V
9.0V
2.2V
0V
4.6V
1.9V
1.7V
5.0V
3.3V3.3V 1.6V0V 1.5V 0V 3.3V 0V 5.1V2.7V2.8V 2.7V
0V
0V
8.3V
6.3V
2.5V
4.9V
3.1V
2.6V2.6 4.2V2.4V1.9
V
3.8V
3.0V
5.0V
0V
V
4.0V
0V
5.0V
9.0V
0V
4.3V
8.3V 8.3V
3.7V1.5V
0V
3.3V
2.0V
3.8V
0.8V
0.7V
1.9V
3.6V
1.9
V
0V
3.9V
1.4V
2.0V
3.5V
2.6V
0.6V
4.6V
2.1V
4.0V
0
1.9
1.9
V
V
V
33
IC701
)
2.8Vp-p(H
43
IC701
)
0.55Vp-p(H
51
IC701
)
3.4Vp-p(H
53
IC701
)
3.6Vp-p(H
IC701
1.0Vp-p(V
IC701
1.0Vp-p(V
IC701
IC701
IC701
21
22
42
1.04Vp-p(H
47
1.6Vp-p(H
52
2.6Vp-p(H
)
)
)
)
)
NOTE
: OPTION(NON MOUNT
X
: BUS WIRE
BW
: NRSA63J-0R0X
0
: 2SC2412K/QR/-X
1
: 2SA1037AK/QR/-X
2
: MA111-X
3
: DTC124EKA-X
5
: 2SC1740S/QR/-T
7
)
AV-21L31B
AV-25L31B
AV-21L31B
AV-25L31B
MAIN(2/2)AND CRT SOCKET PWB CIRCUIT DIAGRAMS
4.0A
AC110V-240V
QEZ0552-227
19.6V
291V
0V
2.4V
DEG COIL
)
0.7Vp-p(V
2
IC401
)
2Vp-p(V
9.0V
0V
1000/25
IC401
30Vp-p(V
20Vp-p(V
)
6
)
14.4V
0.3
V
5
IC401
)
60Vp-p(V
7
100/16
IC401
5Vp-p(V
100/16
)
47/35
5.3V
9.8
9.1V
3.3V
5.1
2.7
V
V
V
100/16
0.9V
-13.1V
0.3V
-15.2V
14.6V
2.0
2.0V
9.0V
1.9V
V
6.6V
2.5V
2.4
V
TO
MAIN
PWB
CN00T
3
IC401
1
IC401
CRT SOCKET
CRT SOCET PWB ASS'Y
SCH-1022A-H2
(
AV-21L31B-PH
SCH-1023A-H2
(
AV-25L31B-PH
TO
CRT
)
)
PICTURE TUBE
MAIN PWB ASS'Y(2/2
SCH-1022A-H2(AV-21L31B-PH
SCH-1023A-H2(AV-25L31B-PH
DIFFERENCE LIST(PA RT S
134.2V
26.6V
27.7V
0V
B
)
Q521
2Vp-p(H
)
Q522
B
2.4Vp-p(H
0V
0V
0.6V
T551 T551
)
150Vp-p(H)150Vp-p(H
0V
6
7
)
20.6V
-0.1V
FOR ADJ.
CONNECTOR
270
T551
25Vp-p(H
4
)
T551
90Vp-p(H
8
)
T551
1140Vp-p(H
10
)
134.2V
133.8V
0V
5.0V
0V
)
)
)
Q521
45Vp-p(H
C
)
9
T551 T551
)
8Vp-p(H
96Vp-p(H
2
)
NOTE
: OPTION(NON MOUNT
X
: BUS WIRE
BW
: NRSA63J-0R0X
0
: 2SC2412K/QR/-X
1
: 2SA1037AK/QR/-X
2
: MA111-X
3
)
33Ø
R592R591R542R529R528R524R494R493R414R413R373R369R364R354
2.2Ø2.2kØ150kØ1.2Ø1.2Ø33Ø22kØ6.8Ø5.6Ø390kØ2.2kØ2.2kØ2.2kØSCH-1022A-H2
DEF YOKE
3.9Ø4.7kØ120kØ0.47Ø0.47Ø82Ø47Ø33kØ12Ø2.7Ø120kØ1.8kØ1.8kØ1.8kØSCH-1023A-H2
D953D522D521C960C956C955C592C529C528C525C524C354C353R593
NOT USEDRU3AM-LFC4ERB06-15-F1100µF/160VNOT USEDNOT USED100µF/160V4.7µF/250V0.15µF0.0047µF0.006µFNOT USED4.7µF/250V1kØSCH-1022A-H2
RGP10J-5025-T331DF6N-FC5RH3G-F1220µF/160V220µF/35V470pF220µF/160V2.2µF/100V0.22µF0.011µF0.0045µF0.0022µF1µF/250V820ØSCH-1023A-H2
Y956Y955K953 V01 L01DY01 CP952 T551T521L524L523L480D956
IM-BWNOT USEDNOT USEDA51LSH196XQQW0118-001QQD0044-001NOT USEDQQH0104-001CE40203-00CJ1QQLZ034-430QQR1005-002QQLZ016-821RU3AM-LFC4SCH-1022A-H2
A60LST196X
IM-BWQQR1214-001YQQW0119-001QQD0043-001ICP-N50-YQQH0097-001QQR1229-001QQLZ034-240QQR1137-005QQR1138-00131DF6N-FC5SCH-1023A-H2
NOT USED
No.51905 2-7 2-8 No.51905
PATTERN DIAGRAMS
MAIN PWB PATTERN
AV-21L31B
AV-25L31B
AV-21L31B
AV-25L31B
B1
()
()
FRONT
No.51905 No.51905
2-9 2-10
CRT SOCKET PWB PATTERN
AV-21L31B
AV-25L31B
TOP
()
No.51905
2-11
VICTOR COMPANY OF JAPAN, LIMITED
HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan
AV21L31BPHSK #4
AV25L31BPHSK #4
Printed in Japan
VP0109
SW
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