JVC AV16N81/VT, AV-16N81G/VT, AV-20N81/VT, AV-21D81/VT Schematics
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
AV-21D81
AV-20N81
AV-16N81
AV-16N81G
AV-21D81/VT
AV-20N81/VT
AV-16N81/VT
AV-16N81G/VT
CD-ROM No.SML200112
BASIC CHASSIS
CL-M
[AV-16N81G/VT]
CONTENTS
NOTE ON USING CIRCUIT DIAGRAMS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
PATTERN DIAGRAMS
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
[AV-20N81/VT]
[AV-16N81/
VT]
[AV-21D81/
VT]
2-1
2-2
2-3
2-5
2-13
No.51902
Dec. 2001
AV-21D81 AV-20N81
STANDARD CIRCUIT DIAGRAM
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 con ditions.
(1)Input signal : Colour bar signal
(2)Setting positions of
each knob/button and
variable resistor
(3)Internal resistance of test er
:DC 20k
/V
(4)Oscilloscope sweepi ng time
:H
20µS/div
:V
5mS/div
:Others
Sweeping time is
specified
(5)Voltage values
:All DC voltage values
Sin ce th e vo l tage val ue s of si gn a l cir cui t va ry to some ex ten t
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 DIAG RAM
(1)Resistors
Resistance value
No unit :[
]
K
:[K
]
M
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
: Original setting position
when shipped
5.NOT E FOR REPAIRING SERVI CE
This mod el's power cir cuit is pa rtly diffe rent 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 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
circ uit con stant s may be subj ect to chan ge f or i mprovem ent
without any notice.
NOTE
Due improvement in performance, some part numbers show
in th e ci rcui t diag ram may not agre e wi th tho se i ndic ate d i n
the part list.
When ordering parts, pl ease use t he numbers t hat appear
in the Parts List.
Type
MM
:M eta lized mylar cap ac i tor
PP
:Polypropylene capacitor
MPP
:Metalized polypropylene capacitor
MF
:Metalized film capacitor
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 display
(6)Connecting method
:Connector
:Wrapping or soldering
:Receptacle
(7)Ground symbol
:LIVE side ground
:ISOLATED(NEUTRAL) side gro und
:EARTH ground
:DIGITAL ground
:[M ]
Capacitance value
1 or higher :[pF]
less than 1
:[µF]
Withstand voltage
No indication :DC 50[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-16N81 AV-16N81G
CONTENTS
AV-21D81 AV-20N81
AV-16N81 AV-16N81G
SEMICONDUCTOR SHAPES
BLOCK DIA GRAM
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM(Tuner,Micro computer & Front control )
MAIN PWB CIRCUIT DIAGRAM(Picture & Audio)
MAIN PWB CIRCUIT DIAGRAM(Power & Deflection)
CRT SOCKET PWB CIRCUIT DIAGRAM
P ATTERN DIAGRAMS
MAIN PW B PAT TERN
CRT SOCKET PATTERN
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
IC
B O TT OM VI EW F R O NT V IEW TO P VI EW
CHIP IC
2-2
E
C
B
OUT
E
IN
N
N
ECB
N
1
N
IN OUTE
BCE
(G)(D)(S)
FRONT VIEW
1 N
TO P VI EW
ECB
1
N
No.51902
TO P VI EW
CHIP TR
ECB
1 N
1
2-2
2-3
2-5
2-7
2-9
2-11
2-13
2-15
C
BE
N
Dec. 2001 No. 51902
BLOCK DIAGRAM
CF103
4.5MH
Z
VIDEO
AMP
IC701
MICRO
COMPUTER
IC201
V/C DEF.
PROCESSOR
R G B
MAIN PWB
CRT SOCKET
PWB
R / G /B
IC702
MEMORY
IC651
AUDIO AMP
V
L
R
FRONT IN
VIDEO-3
FRONT
CONTROL PWB
L
R
OSD
V01
CRT
SCL
SDA
REG.
T921
SW
TRANSF.
Q971
LOW-B SW
IC941
ERROR AMP
IC921
POWER
REG.
PC921
VOLTAGE
FEEDBACK
D901
RECT
DY(V)
DY(H)
DEF.YOKE
H.
OUT
V.
OUT
ECO
SENSOR
REMOCON
RECEVER
KEY
LED
P SW
SCL
SDA
IC202
AUDIO SW
11
5
12
8
L.OUT
R.OUT
RF-IN
RF-IN
R.IN
L.IN
7
10
IC602
VOL&TONE
IC601
SURROUND
17
11
6
3
5
1
19
16
(L)
(R)
(L)
(R)
(V)
(L/R)
(L)
(R)
6
8
CF106
6.0 TRAP
Q208
BUFFER
IC101
P.IF/S.IF
DETECTOR
SF102
CF601
4.5 TRAP
CF604
5.5MHz FILTER
Q604
SIF AMP
TUNER
SF101
18
13
16
15
T101
VCO
(CW)
Q101
AMP
1110
7
5
4
SAW FILTER
SAW FILTER(PAL)
(A)
(V)
V-IN
V-IN
S-IN
FM OUT
V-OUT
VCC
VCC
SIF OUT
SIF IN
V
L
R
LINE
OUT
V
1
L1
R1
IN
VIDEO-1
4 53 141312
AC IN
ENA,DATA,CLOCK,LOCK
1 13
L
R
B1
IC421
VERT.OUT
Q522
H.OUT
FBT
FOCUS
SCREEN
EHV
H.OUT
V.OUT
V-OUT
V-IN
56 1
TV IN
47
SP
02
SP
01
SCL
SDA
Q 102
SW
13
CF104, 105
5.5/6.5 TRAP
Q107
BUFFER
CF608
6.5MHz FILTER
AV-21D81 AV-20N81
AV-16N81 AV-16N81G
AV-21D81 AV-20N81
AV-16N81 AV-16N81G
No.51902
2-3 2-4
No.51902
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