JVC AV-29L81B/-VT Schematics
AV-29L81B
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
BASIC CHASSIS
CH
AV-29L81B
CD-ROM No. SML200112
POWER
DISPLAY
MENU
SUPER
BASS
CHANNEL VOLUME
SYSTEM
SOUND MUTING
COLOUR
TV/VIDEO
123
456
PICTURE MODE
7809
CHANNEL SCAN
RETURN
-/--
OFF TIMER
ECO SENSOR
RM-C356 REMOTE CONTROL UNIT
RM-C356-1C
(-VT)
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No. 51903B
Nov. 2001
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 : Colour bar signal
Setting positions of each knob/button and variable resistor
(2)
: 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-29L81B
: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 : 1/10 [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.
Nov. 2001 No. 51903B
AV-29L81B
CONTENTS
SEMICONDUCTOR SHAPES ................................................................................................................................. 2-2
BLOCK DIAGRAM.......................................................................................................................................................... 2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/2) ............................................................................................................................. 2-5
MAIN PWB CIRCUIT DIAGRAM (2/2) ............................................................................................................................. 2-7
CRT SOCKET PWB CIRCUIT DIAGRAM....................................................................................................................... 2-9
FRONT CONTROL PWB CIRCUIT DIAGRAM ............................................................................................................ 2-11
PATTERN DIAGRAMS
MAIN PWB PATTERN....................................................................................................................................................... 2-13
CRT SOCKET PWB PATTERN ....................................................................................................................................... 2-15
FRONT CONTROL PWB PATTERN .............................................................................................................................. 2-16
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.51903B
N
BLOCK DIAGRAM
AV-29L81B AV-29L81B
J801
VIDEO-1
INPUT
J802,J803
COMPONENT
(VIDEO-2)
INPUT
J804
OUTPUT
TU001
TUNER
VIDEO
AUDIO L/MONO
AUDIO R
V/Y
CB
CR
AUDIO L/MONO
AUDIO R
VIDEO OUT
AUDIO L
AUDIO R
SCL
SDA
IF
43
44
42
19
MAIN PWB
28
SF101
FILTER
SF102
FILTER
29,30
SCL
SDA
1
3
IC702
EEPROM
IC301
COMB
FILTER
CF104,105
5.5 TRAP
6.5 TRAP
7
V1-V
8
V1-L
10
V1-R
3
V2-Y
2
V2-L
4
V2-R
37
Vout2
36
Lout2
35
Rout2
V3-V
L3-L
L3-R
Yin1
COUT1
YOUT1
IC801
VIDEO SW
MTV-V
MTV-R
MTV-L
Rout1
Vout1
Lout1
25
27
CB
CR
13
15
14
26
24
23
Q108
BUF
Q111
BUF
16
14
5,6
SYNC
CLAMP
6.0 TRAP
CF106
CF103
TRAP
29
24
2,3
62,63
43
42
47
48
46
23
SIF IN1
SIF IN2
IF IN1
IF IN2
IC701
V/C DEF.
PROCESSOR
SCL,SDA
SCL1
SDA1
CIN
CVBS/YIN
Y
U
V
7
ROUT
GOUT
BOUT
QSS OUT
VDRB(-)
VDRA(+)
HOUT
IF VOUT
10
64
Q104
BUF
Q109
BUF
51
52
53
35
21,22
33
38
SCL
SDA
5.5 FILTER
6.5 FILTER
32
1
R
G
B
CF140
CF142
Q130
BUF
IC602
SOUND
PROCESSOR
Q136
CF130
FILTER
BUF
20
12
BUF
Q132
Q137
BUF
IC665
FILTER
11
L, R
IC130
PIF/SIF
DETECTOR
5
2
AUDIO AMP
IC650
10
7
12
CRT SOCKET PWB
IC101
VIDEO AMP
VM OUT
FRONT CONTROL
PWB (2/2)
V01
VM
J801
HEADPHONE
JACK
SP
L
SP
R
J302~J304
FRONT IN
(VIDEO-3)
AC IN
VIDEO
AUDIO L/MONO
AUDIO R
TV/VIDEO
VOL+
REMOCON
RECEIVER
FRONT CONTROL PWB (1/2)
VOL- CH+ CH- MENU
POWER
LED
S901
POWER SW
F901
No.51903B No.51903B2-3 2-4
KEY_IN
REMOTE, LED
D901
RECT
IC901
POWER
REG
T901
SW
TRANSF.
PC901
VOLTAGE
FEEDBACK
IC951
ERROR
AMP
IC972
3.3V REG
IC973
12V REG
IC974
REG
L951
IC401
VERT OUT
Q522
H. OUT
3.3V_STB
12V
5V
8V
9V
32V
B1
T551
FBT
V
H
DY01
DEF YOKE
FOCUS1
FOCUS2
SCREEN
EHV
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