JVC AV-16N73/VT, AV-21D73/VT Schematics
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
BASIC CHASSIS
AV-21D73
AV-16N73
AV-21D73/VT AV-16N73/VT
CD-ROM No.SML200209
CG
[RM-C367GY]
CONTENTS
NOTE ON USING CIRCUIT DIAGRAMS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
PATTERN DIAGRAMS
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
[AV-16N73/VT]
[AV-21D73/VT]
2-1
2-2
2-3
2-5
2-13
No.52037
Aug. 2002
AV-21D73
STANDARD CIRCUIT DIAGRAM
AV-21D73
/VT
AV-16N73
/VT
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The components identified by the symbol and shading are
critical for safety. For continued safety re place safety critical
components only with manufac tu res recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
following cond itions.
(1)Input signal : Colour bar signal
(2)Setting positions of
each knob/button and
variable resistor
(3)Internal resistance of tester
:DC 20k
/V
(4)Oscilloscope sweeping time
:H
20µS/div
:V
5mS/div
:Others
Sweeping time is
specified
(5)Voltage values
:All DC voltage values
Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.
3.INDICAT ION OF PARTS SYMBOL [EXAMPLE]
In the PW board
:R1209
R209
4.IND ICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit :[
]
K
:[K
]
M
Rated allowable power
No indication :1/ 16 [W]
Others :As specified
Type
No indica tion
:Carbon resistor
OMR
:Oxide metal film resistor
MFR
:Metal film resistor
MPR
:Metal plate resistor
UNFR
:Uninflammable resi stor
FR
:Fusible resistor
C omposition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
: Original setting position
when shipped
5.NOTE FOR RE PAIRIN G S ERVICE
This m ode l' s pow er circu it is p ar tly di ff ere nt 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 sid e GND or the LIVE si de 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 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 ci rcuit 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, plea se use the numbers t hat appear
in the Parts List.
Type
MM
:M etal ized mylar capa c i tor
PP
:Polypropylene capacitor
MPP
:Metalized polypropylene capacitor
MF
:Metalized film capac itor
TF
:Thin film capacitor
BP
:Bipolar electrolytic capaci tor
TAN
:Tantalum capacitor
(3)Coils
No unit
:[
µ
H]
Others
:As specified
(4)Power Supply
:B1
:9V
:5V
Respective voltage values are indicated
(5)Test point
:T est po int
:Only test point d isplay
(6)Connecting method
:Connector
:Wrapping or soldering
:Receptacle
(7)Ground symbol
:LIVE side ground
:ISOLATED(NEUTRAL) side ground
:EARTH ground
:DIGITAL ground
:[M ]
Capacitance value
1 or higher :[pF]
less than 1
:[µF]
Withstand voltage
No indication :DC50[V]
Others :DC withstand voltage [V]
AC indicated
:AC withstand voltage [V]
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
No indication
:Ceramic capacitor
:B2 (12V)
AV-16N73
AV-21D73
AV-16N73
No.52037
Aug. 2002 No. 520372-16
AV-21D73
AV-16N73
CONTENTS
AV-21D73
AV-16N73
CRT SOCKET PWB PATTERN
SEMICONDUCTOR SHAPES
BLOCK DIA GRAM
CIRCUIT DIAGRAMS
MAI N PWB CIRCUI T DIAGRA M
P ATTERN DIAGRAMS
MAIN PW B PATTERN
CRT SOCKET PWB PATTERN
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
E
C
B
ECB
BCE
(G)(D)(S )
FRONT VIEW
ECB
ECB
TO P VI EW
CHIP TR
C
BE
2-2
2-3
2-5
2-13
2-15
TOP
8
6
3
W270
E
5
3
R
C354
3
6
3
R
5
3
R
-4
P
T
R366
Q351
B
4
C
7
L351
/R
G
7
R360
SCREEN
T
G2
R
/G
R
7
-4
P
3
C
3
C
6
3
3
W
5
G2
R
3
5
3
R356
1
5
R359
2
RK
GK
B
5
6
3
BK
R362
R
L354
MARK
1
R369
4
U
NEAMX5 94V-0
C
E
6
5
3
C
HE
Q353
H
3
5
3
L
IC
B O TT OM VI EW F R O NT V IEW TO P VI EW
OUT
E
IN
IN OUTE
1 N
1 N
CHIP IC
TO P VI EW
N
N
N
1
N
1
N
R364
R346
1
N
C357
D356
W
R
R
D352
7
3
3
R351
B
5
4
3
2
5
3
3
5
3
D
6
7
5
W
3
R
R349
3
L
2
5
C
Q352
R3
E
7
4
8
4
3
R
GK
R361
55
C
W338
RK
G1
G1
5
5
3
8
5
3
R
1
5
3
K
4
5
3
D
R
A
M
7
6
3
R
5
HE
5
5
3
D
T
K
1
SK351
BK
H
2
H
-E
9
4
3
1
F
K
C
D351
G1
TP-47B
E1
-1
1
\4
/2
2
0
\4
TP-E
2-2
No.52037No.52037
2-15
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