JVC AV-21L81B(-BK), AV-25L81B(-BK), AV-29L81B(-BK) Schematics
AV-21L81B
AV-25L81B
AV-29L81B
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
BASIC CHASSIS
CH
DISPLAY
SUPER
BASS
CHANNEL VOLUME
SYSTEM
COLOUR
SOUND MUTING
TV/VIDEO
I/II
PICTURE MODE
CHANNEL SCAN
RETURN
ECO SENSOR
RM-C358 REMOTE CONTROL UNIT
POWER
MENU
123
456
7809
OFF TIMER
AV-21L81B
AV-25L81B
AV-29L81B
(-BK)
(-BK)
(-BK)
CD-ROM No. SML200111
POWER
DISPLAY
MENU
SUPER
BASS
CHANNEL VOLUME
SYSTEM
COLOUR
SOUND MUTING
TV/VIDEO
123
I/II
456
PICTURE MODE
7809
CHANNEL SCAN
RETURN
-/--
ECO SENSOR
RM-C358 REMOTE CONTROL UNIT
-/--
OFF TIMER
RM-C358-1C
[AV-21L81B
(-BK)
, AV-25L81B
RM-C358-1C
(-BK)
] [AV-29L81B
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
(-BK)
]
No. 51853
Oct. 2001
AV-21L81B (-BK)
AV-25L81B (-BK)
AV-21L81B
AV-25L81B
AV-29L81B
AV-29L81B (-BK)
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 : Colour 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 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.
Oct. 2001 No. 51853
AV-21L81B
AV-25L81B
AV-29L81B
CONTENTS
SEMICONDUCTOR SHAPES ................................................................................................................................. 2-2
BLOCK DIAGRAM [AV-21L81B-BK, AV-25L81B-BK] ..........................................................................2-3
CIRCUIT DIAGRAMS [AV-21L81B-BK, AV-25L81B-BK]
MAIN PWB CIRCUIT DIAGRAM (1/2) [AV-21L81B-BK, AV-25L81B-BK] ................................................................ 2-5
MAIN (2/2) AND CRT SOCKET PWB CIRCUIT DIAGRAMS [AV-21L81B-BK, AV-25L81B-BK]......................... 2-7
PATTERN DIAGRAMS[AV-21L81B-BK, AV-25L81B-BK]
MAIN PWB PATTERN [AV-21L81B-BK, AV-25L81B-BK] ............................................................................................ 2-9
CRT SOCKET PWB PATTERN [AV-21L81B-BK, AV-25L81B-BK] .......................................................................... 2-11
BLOCK DIAGRAM [AV-29L81B-BK] ............................................................................................................... 2-13
CIRCUIT DIAGRAMS [AV-29L81B-BK]
MAIN PWB CIRCUIT DIAGRAM (1/2) [AV-29L81B-BK]............................................................................................ 2-15
MAIN PWB CIRCUIT DIAGRAM (2/2) [AV-29L81B-BK]............................................................................................ 2-17
CRT SOCKET PWB CIRCUIT DIAGRAM [AV-29L81B-BK] ..................................................................................... 2-19
FRONT CONTROL PWB CIRCUIT DIAGRAM [AV-29L81B-BK] ............................................................................. 2-21
PATTERN DIAGRAMS [AV-29L81B-BK]
MAIN PWB PATTERN [AV-29L81B-BK] ....................................................................................................................... 2-23
CRT SOCKET PWB PATTERN [AV-29L81B-BK] ....................................................................................................... 2-25
FRONT CONTROL PWB PATTERN [AV-29L81B-BK] ............................................................................................... 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.51853
N
BLOCK DIAGRAM [AV-21L81B-BK,AV-25L81B-BK]
SCL
SCL
SDA
SDA
TU001
TU001
TUNER
J801
J801
VIDEO-1
VIDEO-1
INPUT
INPUT
J802,J803
J802,J803
COMPONENT
COMPONENT
(VIDEO-2)
(VIDEO-2)
INPUT
INPUT
J804
J804
OUTPUT
OUTPUT
J771-J773
J771-J773
FRONT IN
FRONT IN
(VIDEO-3)
(VIDEO-3)
TUNER
VIDEO
VIDEO
AUDIO L/MONO
AUDIO L/MONO
AUDIO R
AUDIO R
V/Y
V/Y
CB
CB
CR
CR
AUDIO L/MONO
AUDIO L/MONO
AUDIO R
AUDIO R
VIDEO OUT
VIDEO OUT
AUDIO L
AUDIO L
AUDIO R
AUDIO R
VIDEO
VIDEO
AUDIO L/MONO
AUDIO L/MONO
AUDIO R
AUDIO R
IF
IF
7
7
V1-V
V1-V
8
8
V1-L
V1-L
10
10
V1-R
V1-R
3
3
V2-Y
V2-Y
IC801
IC801
VIDEO SW
VIDEO SW
2
2
V2-L
V2-L
4
4
V2-R
V2-R
37
37
Vout2
Vout2
36
36
Lout2
Lout2
35
35
Rout2
Rout2
43
43
V3-V
V3-V
44
44
L3-L
L3-L
42
42
L3-R
L3-R
19
19
Yin1
Yin1
SCL
SCL
SDA
SDA
COUT1
COUT1
YOUT1
YOUT1
MTV-V
MTV-V
MTV-R
MTV-R
MTV-L
MTV-L
Lout1
Lout1
Rout1
Rout1
Vout1
Vout1
SF101
SF101
FILTER
FILTER
SF102
SF102
FILTER
FILTER
29,30
29,30
25
25
27
27
13
13
15
15
14
14
26
26
24
24
23
23
Q108
Q108
BUF
BUF
CB
CB
CR
CR
CF104,105
CF104,105
5.5 TRAP
5.5 TRAP
6.5 TRAP
6.5 TRAP
EEPROM
EEPROM
IC702
IC702
Q107
Q107
BUF
BUF
5,6
5,6
28
28
29
29
23
23
24
24
2,3
2,3
62,63
62,63
43
43
42
42
47
47
48
48
46
46
CF106
CF106
6.0 TRAP
6.0 TRAP
SIF IN1
SIF IN1
SIF IN2
SIF IN2
IF IN1
IF IN1
IF IN2
IF IN2
IC701
IC701
V/C DEF.
V/C DEF.
PROCESSOR
PROCESSOR
SCL,SDA
SCL,SDA
SCL1
SCL1
SDA1
SDA1
CIN
CIN
CVBS/YIN
CVBS/YIN
Y
Y
U
U
V
V
7
7
AV-21L81B
AV-21L81B
AV-25L81B AV-25L81B
51
ROUT
ROUT
GOUT
GOUT
BOUT
BOUT
QSS OUT
QSS OUT
VDRB(-)
VDRB(-)
VDRA(+)
VDRA(+)
HOUT
HOUT
IF VOUT
IF VOUT
51
52
52
53
53
35
35
21,22
21,22
33
33
38
38
10
10
64
64
Q109
Q109
BUF
BUF
SCL
SCL
SDA
SDA
5.5 FILTER
5.5 FILTER
6.0 FILTER
6.0 FILTER
6.5 FILTER
6.5 FILTER
32
32
1
1
R
R
G
G
B
B
CF140
CF140
CF141
CF141
CF142
CF142
Q130
Q130
BUF
BUF
IC602
IC602
SOUND
SOUND
PROCESSOR
PROCESSOR
CF130
CF130
FILTER
FILTER
20
20
12
12
19
19
Q136
Q136
BUF
BUF
12
12
BUF
BUF
Q132
Q132
L
L
R
R
BASS
BASS
IC850
IC850
OP AMP
OP AMP
Q137
Q137
BUF
BUF
8
8
L, R
L, R
9
9
3
3
4
4
11
11
MAIN PWB
MAIN PWB
IC130
IC130
PIF/SIF
PIF/SIF
DETECTOR
DETECTOR
IC650
IC650
AUDIO AMP
AUDIO AMP
CRT SOCKET PWB
CRT SOCKET PWB
2
2
3
3
1
1
10
10
20
20
13
13
23
23
IC351
IC351
VIDEO AMP
VIDEO AMP
8
8
7
7
9
9
J774
J774
BASS SPEAKER
BASS SPEAKER
OUT
OUT
J770
J770
HEADPHONE
HEADPHONE
JACK
JACK
SP
SP
L
L
SP
SP
R
R
V01
V01
AC IN
AC IN
VOL+
VOL+
VOL- CH+ CH- MENU
VOL- CH+ CH- MENU
POWER
REMOCON
REMOCON
RECEIVER
RECEIVER
S901
S901
POWER SW
POWER SW
POWER
LED
LED
F901
F901
No.51853 No.51853
KEY_IN
KEY_IN
REMOTE, LED
REMOTE, LED
D901
D901
RECT
RECT
IC901
IC901
POWER
POWER
REG
REG
T901
T901
SW
SW
TRANSF.
TRANSF.
PC901
PC901
VOLTAGE
VOLTAGE
FEEDBACK
FEEDBACK
IC951
IC951
ERROR
ERROR
AMP
AMP
2-3 2-4
IC972
IC972
3.3V REG
3.3V REG
IC974
IC974
REG
REG
L951
L951
IC401
IC401
VERT OUT
VERT OUT
Q522
Q522
H. OUT
H. OUT
3.3V_STB
3.3V_STB
5V
5V
8V
8V
9V
9V
32V
32V
B1
B1
T551
T551
FBT
FBT
FOCUS1
FOCUS1
SCREEN
SCREEN
EHV
EHV
V
V
DY01
DY01
DEF YOKE
DEF YOKE
H
H
CIRCUIT DIAGRAMS [AV-21L81B-BK,AV-25L81B-BK]
MAIN PWB CIRCUIT DIAGRAMS(1/2)[AV-21L81B-BK,AV-25L81B-BK]
TO
SPEAKER
BASS
SPEAKER OUT
0V
5.0V
AV-21L81B
AV-21L81B
AV-25L81B AV-25L81B
FRONT INPUT
(
)
VIDEO-3
VIDEO-1
INPUT
COMPONENT
(
VIDEO-2
INPUT
OUTPUT
)
R885
D806
MTZJ12C-T2
R884
D807
MTZJ12C-T2
9.0V
5.0V
4.4V
7
IC801
)
1.2Vp-p(H
23
IC801
)
2.2Vp-p(H
27
IC801
)
2.1Vp-p(H
37
IC801
)
2.2Vp-p(H
DIFFERENCE LIST(PARTS
R748 R749
SCH-1040A-BK
SCH-1043A-BK
2.7M
2.2M
No.51853 No.51853
)
2.2M
1.8M
K701
QQR1214-001Y
BW
4.9V
4.3V
4.9V
4.4V
4.9V
5.3V
4.3V
4.4V
7.0V
5.9V
4.9V
4.3V
4.3V
5.7V
4.9V
2.6V
2.1V
-1.0V
4.6V
5.0V
4.4V
4.9V
4.3V
9.0V
4.4V
5.0V
4.2V
4.2V
4.3V
4.3V
1.7V
0V
1.9V
1.7V
4.1V
4.2V
3.4V
4.2V
5.1V
2.3V
0V
-0.4V
0V
-0.4V
0V
0V
0.6V
0V
0.6V
0V
9.0V
3.0V
2.4V
9.0V
3.7V1.5V 8.3V 8.3V
0V
3.3V
3.8V
1.9V
3.6V
1.9
V
4.3V
4.6V
1.9V
2.6V
4.2V
TO CRT SOCKET
PWB CN10T
1.9V
2.6V
2.6V
3.3V
3.3V
5.0 5.0
V
5.0V
3.3V
V
3.3V 1.6V0V 1.5V 0V
1.8V
1.6V
3.3V
0V
1.9V
1.7V
3.3V
1.9
2.6V2.6 4.2V2.4
5.1V2.7V2.8V 2.7V
3.3V
3.3V 0V
8.3V
3.3V
0V
3.3V
5.0
2.8
V
V
1.5V
9.0V
2.2V
4.6V
4.9V
0V
0V
3.0V
V
V
V
2.0V
0.8V
0.7V
3.8V
3.0V
4.0V
0V
5.0V
5.0V
0V
0V
2.7V
4.8V
5.0V
5.0
V
5.0V
0V
3.3V
5.0V
2.7V
0V
0V
5.0V
33.8V
MAIN PWB ASS’Y(1/2
SCH-1040A-BK(AV-21L81B-BK
SCH-1043A-BK(AV-25L81B-BK
0V
3.9V
4.9V
4.9V
4.3V
1.4V
2.0V
3.5V
2.6V
0.6V
IC701
TDA9386N12S0555
2.1V
0
1.9
1.9
4.0V
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
)
2-5 2-6
: 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
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