JVC AV-21L31B/T, AV-29L31/T, AV-29L31B/T Schematics
AV-21L31B
AV-29L31
AV-29L31B
SCHEMATIC DIAGRAMS
COLOR TELEVISION
BASIC CHASSIS
CH
POWER
DISPLAY
MENU
CHANNEL VOLUME
CLOSED
MUTING
CAPTION
TV/VIDEO
123
456
PICTURE MODE
7809
100
RETURN
CHANNEL SCAN
OFF TIMER
ECO SENSOR
RM-C248 REMOTE CONTROL UNIT
RM-C248-2C
[AV-29L31
/T]
POWER
DISPLAY
MENU
BASS
CHANNEL VOLUME
CLOSED
MUTING
CAPTION
TV/VIDEO
123
456
PICTURE MODE
7809
RETURN
100
CHANNEL SCAN
OFF TIMER
ECO SENSOR
RM-C249 REMOTE CONTROL UNIT
RM-C249-2C
[AV-21L31B
[AV-29L31B
AV-21L31B
AV-29L31
AV-29L31B
CD-ROM No. SML200202
/T]
/T]
/T
/T
/T
[AV-21L31B/T] [AV-29L31/T, AV-29L31B/T]
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No. 51926
Jan. 2002
AV-21L31B /T
AV-29L31 /T
AV-21L31B
AV-29L31
AV-29L31B
AV-29L31B /T
q
NOTE ON USING CIRCUIT DIAGRAMS
STANDARD CIRCUIT DIAGRAM
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
:B1
: B2(12V)
:9V
:5V
9Respective voltage values are indicated
(5) Test point
: 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 the LIVE side GND and
ISOLATED(NEUTRAL) side GND at the same time with a measuring apparatus ( oscilloscope, etc.). 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.
Jan. 2002 No. 51926
AV-21L31B
AV-29L31
AV-29L31B
CONTENTS
SEMICONDUCTOR SHAPES ................................................................................................................................. 2-2
BLOCK DIAGRAM [AV-21L31B/T] ....................................................................................................................... 2-3
CIRCUIT DIAGRAMS [AV-21L31B/T] .................................................................................................................2-5
MAIN PWB CIRCUIT DIAGRAM (1/3) ............................................................................................................................. 2-5
MAIN PWB CIRCUIT DIAGRAMS (2/3, 3/3) ................................................................................................................... 2-7
PATTERN DIAGRAMS[AV-21L31B/T] ................................................................................................................ 2-9
MAIN PWB PATTERN......................................................................................................................................................... 2-9
MAIN (CRT SOCKET) PWB PATTERN ......................................................................................................................... 2-11
BLOCK DIAGRAM [AV-29L31/T, AV-29L31B/T] ......................................................................................... 2-13
CIRCUIT DIAGRAMS [AV-29L31/T, AV-29L31B/T] ................................................................................... 2-15
MAIN PWB CIRCUIT DIAGRAM (1/2) ........................................................................................................................... 2-15
MAIN PWB CIRCUIT DIAGRAM (2/2) ........................................................................................................................... 2-17
CRT SOCKET PWB CIRCUIT DIAGRAM..................................................................................................................... 2-19
FRONT CONTROL PWB CIRCUIT DIAGRAM ............................................................................................................ 2-21
PATTERN DIAGRAMS [AV-29L31/T, AV-29L31B/T] ................................................................................. 2-23
MAIN PWB PATTERN....................................................................................................................................................... 2-23
CRT SOCKET PWB PATTERN ....................................................................................................................................... 2-25
FRONT CONTROL PWB PATTERN .............................................................................................................................. 2-26
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.51926
N
BLOCK DIAGRAM [AV-21L31B/T]
AV-21L31B AV-21L31B
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
MAIN (CRT SOCKET) PWB
2
3
1
IC351
VIDEO AMP
8
7
9
J774
BASS SPEAKER
OUT
J770
HEADPHONE
JACK
SP
SP
V
V01
L
R
DY01
DEF YOKE
H
FOCUS1
B1
T551
SCREEN
FBT
EHV
No.51926 No.51926
2-3 2-4
CIRCUIT DIAGRAMS [AV-21L31B/T]
MAIN PWB CIRCUIT DIAGRAM(1/3
)
AV-21L31B AV-21L31B
FRONT INPUT
(
)
VIDEO-3
VIDEO-1
INPUT
COMPONENT
(
VIDEO-2
INPUT
OUTPUT
9.0V
BASS
SPEAKER OUT
5.0V
0V
0V
5.0V
4.9V
4.3V
4.9V
4.4V
4.9V
5.3V
4.3V
4.4V
7.0V
5.9V
4.3V
4.3V
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
1.9V
1.7V
4.1V
4.2V
3.4V
4.2V
5.1V
2.3V
1.7V
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
1.5V
0.2
V
5.0
V
5.0V
0V
0V
0V
2.9V
2.9V
2.4V
2.4V
3.3V
2.7V
4.8V
5.0V
3.3V
5.0V
2.7V
3.3V
5.0V
5.0V
1.7V
1.9V
5.0V
TO CRT SOCKET
PWB CN10T
3.3V
3.3V
5.05.0
V
V
3.3V
1.8V
1.6V
3.3V
3.3V
5.0
V
3.3V
2.8
3.3V
0V
0V
V
6.3V
3.1V
2.5V
2.7V2.8V 2.7V 5.1V0V3.3V0V1.5V0V 1.6V
8.3V
0V
V
V
3.8V
4.0V
3.0V
4.9V
0V
5.0V
5.0V
0V
9.0V
0V
4.3V
1.9V2.4V4.22.6V2.6
1.5V 3.7V
0.7V
0.8V
2.0V
8.3V8.3V
0V
3.3V
3.8V
1.9V
4.6V
3.6V
1.9
V
0V
3.9V
1.4V
2.0V
3.5V
2.6V
0.6V
2.1V
4.0V
0
1.9
1.9
V
V
V
33
IC701
)
2.8Vp-p(H
43
IC701
)
0.55Vp-p(H
IC701
1.0Vp-p(V
IC701
1.0Vp-p(V
IC701
IC701
21
22
42
1.04Vp-p(H
47
1.6Vp-p(H
)
)
)
)
TO
SPEAKER
)
4.4V
7
IC801
)
1.2Vp-p(H
IC801
2.2Vp-p(H
IC801
2.1Vp-p(H
IC801
2.2Vp-p(H
23
)
0V
-0.4V
27
0V
)
4.6V
-1.0V
5.0V
37
)
MAIN PWB ASS’Y(1/3
)
0V
-0.4V
0V
0V
0.6V
0V
0V
0V
0V
0.6V
33.8V
1.7V
5.0V
5.0V
SCH-1042A-H2
1.5V
9.0V
2.2V
0V
4.6V
1.9V
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
IC701
3.4Vp-p(H
IC701
3.6Vp-p(H
)
51
)
53
)
IC701
2.6Vp-p(H
52
)
2-5 2-6No.51926 No.51926
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