JVC AV-21CS24, AV-21CX14 Schematics
SCHEMATIC DIAGRAMS
FLAT COLOUR TELEVISION
AV-21CS24 AV-21CX14
CD-ROM No. SML200407
BASIC CHASSIS
CW
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YA106
2004/7
AV-21CS24, AV-21CX14
STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS
1. SAFETY
The components identified by the
are critical for safety. For continued safety replace safety
critical components only with manufactures recommended
parts.
symbol and shading
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
(3) Internal resistance of tester : DC 20kΩ/V
(4) Oscilloscope sweeping time : H ⇒ 20µs/div
(5) Voltage values : All DC voltage values
: Original setting position when
shipped
:V ⇒ 5ms/div
: Others ⇒ Sweeping time is
specified
∗Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.
3. INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board : R1209 → R209
•
4. INDICATIONS ON THE CIRCUIT DIAGRAM
(1) Resistors
Resistance value
•
No unit : [Ω]
k:[kΩ]
M:[MΩ]
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 : Uninflammable resistor
FR : Fusible resistor
∗Composition 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]
∗Electrolytic Capacitors
47/50[Example] : Capacitance value [µF]/withstand voltage[V]
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
∗Respective voltage values are indicated
(5) Test point
(6) Connecting method
(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
circuit constants may be subject to change for
improvement without any notice.
NOTE
♦
Due improvement in performance, some part numbers
show in the circuit diagram may not agree with those
indicated in the part list.
When ordering parts, please use the numbers that appear
in the Parts List.
:B1
: B2(12V)
: 3.3V
:5V
: Test point
: Only test point display
: Connector
: Wrapping or soldering
: Receptacle
(No. YA106) 2-1
CONTENTS
SEMICONDUCTOR SHAPES ....................................................................................................................................2-2
BLOCK DIAGRAM ............................................................................................................................................................ 2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM [AV-21CS24] (1/3) ....................................................................................................... 2-5
MAIN PWB CIRCUIT DIAGRAM [AV-21CS24] (2/3), 3/3) .............................................................................................. 2-7
MAIN PWB CIRCUIT DIAGRAM [AV-21CX14] (1/3) ....................................................................................................... 2-9
MAIN PWB CIRCUIT DIAGRAM [AV-21CX14] (2/3), 3/3) ............................................................................................ 2-11
PATTERN DIAGRAMS
MAIN PWB PATTERN ...................................................................................................................................................... 2-13
VOLTAGE CHART ......................................................................................................................................................... 2-15
WAVEFORMS ................................................................................................................................................................... 2-16
SEMICONDUCTOR SHAPES
TRANSISTOR
TOP VIEWBOTTOM VIEW FRONT VIEW
CHIP TR
E
C
B
ECB
EC
B
(G)(D)(S)
ECB
ECB
C
B
E
IC
OUT
E
IN
IN E OUT
1N
1N
CHIP IC
TOP VIEW
N
N
N
1
N
1
N
P.W. BOARD ASS’Y NAME AV-21CS24 AV-21CX14
MAIN P.W. BOARD SCW-1005A SCW-1010A-H2
TOP VIEWBOTTOM VIEW FRONT VIEW
1N
2-2 (No. YA106)
J801
VIDEO-1
INPUT
TU001
TUNER
VIDEO
AUDIO L/MONO
AUDIO R
IF
J804
OUTPUT
AUDIO L
AUDIO R
VIDEO OUT
SF101
SAW FILTER
SF102
SAW FILTER
IC601
AUDIO AMP
MAIN PWB
13
23
9
3
VOL+
REMOCON
RECEIVER
VOL- CH+ CH- MENU
POWER
LED
AC IN
F901
POWER SW
S901
J806~J808
FRONT IN
(VIDEO-2)
VIDEO
AUDIO L/MONO
AUDIO R
T522
FBT
B1
SCREEN
FOCUS
EHV
D901
RECT
T921
SW
TRANSF.
L951
8V
12V
5V
STB3.3V
32V
IC951
ERROR
AMP
PC901
VOLTAGE
FEEDBACK
IC921
POWER
REG
IC973
12V REG
IC975
5V REG
IC972
3.3V REG
IC976
1.8V REG
IC974
1.8V REG
1, 7
5
IC401
V. OUT
Q522
H. OUT
SPEAKER L
SPEAKER R
J809
HEADPHONE
MAIN PWB
(CRT SOCKET)
R
G
B
V01
IC351
RGB OUT
V
H
DY01
DEF YOKE
1.8V
V1.8V
IC702
MAIN MEMORY
29, 30
SIF IN
IF IN
SIF DETECT
VIDEO
IDENT.
AUDIO
CONTROL
COMB FILTER
Y DELAY ADJ.
COLOUR
DEMOD
SYNC
SEP.
H. DRIVE
VIF DETECT/AGC/AFT
SOUND TRAP
TELETEXT DECODER
DIGITAL SIGNAL PROCESS
PEAKING SCAN
VELOCITY MOD.
U/V DELAY
RGB MATRIX
&
GAMMA
AUDIO
SELECT
VIDEO
SELECT
I/O
PORT
AUDIO
SELECT
V1
V3
L1
L3
R1
R3
VOUT
LOUT
ROUT
24, 25
58
51
49
50
34
35
48
36
37
ROUT
85
GOUT
BOUT
86
87
VDA,VDB
HOUT
22, 23
67
OUT_L
OUT_R
60
61
RRGGB
B
I2C
BUS
KEY_IN
REMOTE
LED
SCL0, SDA0
98,99
97
119
127,128
MAIN MICROCOMPUTER, TELETEXT DECODE,
IF/ VIDEO/SYNC/DEF PROCESS
IC701
V. DRIVE
MICRO
COMPUTER
BASE-BAND
DELAY LINE
Y
C
B-Y R-Y
SKIN TONE
U/V TINT
SATURATION
OSD/TEXT
INSERT
BLOCK DIAGRAM
No. YA106
2-3 2-4
No. YA106
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