Page 1
AV-21PM
AV-21PM
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
AV-21PM
+−
+
−
■ APPLICABLE MODELS
This standard circuit diagram is applicable to the following models.
However, there will be dif ferences between this model and the following applicable models. For the differences,
please refer to "PARTS DIFFERENCE TABLE" in the service manual of the following applicable models.
Basic Model (this Model)
AV-21PM
(Service Manual: No. 56055, Aug. 2000)
AV-21PM(-A) (Service Manual: No. 56056, Aug. 2000)
AV-21PM(AU) (Service Manual: No. 56057, Aug. 2000)
AV-21P7EE (Service Manual: No. 56058, Aug. 2000)
AV-21P4(BK) (Service Manual: No. 56059, Aug. 2000)
AV-21P7(PH) (Service Manual: No. 56061, Aug. 2000)
Applicable Models
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
No. 56055 2-1
No. 56055
Aug. 2000
Page 2
AV-21PM
2-2 No. 56055
Page 3
STANDARD CIRCUIT DIAGRAM
AV-21PM
■ NOTE ON USING CIRCUIT DIAGRAMS
1. SAFETY
The components identified by the
critical for safety. For continued safety replace safety critical
components only with manufactures recommended parts.
2. SPECIFIED VOL T AGE AND W AVEFORM 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
* 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 : 1/4 [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
* 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]
!!
! symbol and shading are
!!
: Original setting position when
shipped
: V ➞ 5mS/div
: Others ➞ Sweeping time is
specified.
● 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
: 12V
: 9V
: 5V
* Respective voltage values are indicated.
(5)Test point
: Test point
: Only test point display
(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 (NEU-
TRAL) 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
circuit constants may be subject to change for improvement
without any notice.
No. 56055 2-3
Page 4
AV-21PM
CONTENTS
SEMICONDUCTOR SHAPES ........................................................... 2-4
BLOCK DIAGRAM ............................................................................ 2-5
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM............................................................................................... 2-7
FRONT CONTROL PWB CIRCUIT DIAGRAM....................................................................... 2-11
CRT SOCKET PWB CIRCUIT DIAGRAM .............................................................................. 2-13
PATTERN DIAGRAMS
MAIN PWB PATTERN ............................................................................................................. 2-15
FRONT CONTROL PWB PATTERN ....................................................................................... 2-17
CRT SOCKET PWB PATTERN............................................................................................... 2-19
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
E
C
B
IC
BOTTOM VIEW
OUT
E
IN
CHIP IC
E
CB
IN E OUT
B
(G)C(D)E(S)
FRONT VIEW
1N
TOP VIEW
TOP VIEW
CHIP TR
C
E
CB
E
CB
1N
BE
TOP VIEWFRONT VIEW
1N
N
N
N
1
N
2-4 No. 56055
1
N
Page 5
BLOCK DIAGRAM
AV-21PM AV-21PM
REAR
IN
VIDEO
AUDIO
MAIN PWB
IC703
5V REG/RESET
IC702
MEMORY
TU001
TUNER
SCL
SDA
IF
34
RST
IC701
MICRO COMPUTER
2,3
SCL
SDA
3.58/
OTH
2537,38
Q102
IF AMP
OSD
RGB
Q103
SW
SCL/SDA
30,31,32
SF102
SF122
6,7,8
21 18,19
SAWQSS IN
EXT
RGB
VIDEO
VIDEO
IN
OUT
24 36 29
IC651
AUDIO AMP
AUDIO OUT
IC301
1 CHIP DECODER
AUDIO
IN
H.OUT
42 45
IN
3
30
SAW TOOTH
RGB
OUT
9
10,11,12
FRONT CONTROL PWB
ECO
REMOCON
KEY
IND.
R/G/B
SP01
SP01
HEADPHONE
VIDEO
FRONT IN
AUDIO
AC IN
CRT SOCKET PWB
RGB
DRIVE
V01
CRT
OUT
VIDEO
AUDIO
D901
RECT
IC921
POWER
REG.
PC921
VOLTAGE
FEEDBACK
T921
SW
TRANSF.
SCL/SDA
IC971
5/9V REG.
IC941
ERROR
AMP
P SW
F901
13
V.DRIVE &
CORRECITON
IC451
E/W PIN
2
E/W
Q462
SIDEPIN OUT
48
IC421
V.OUT
2
DY(V)
DY(H)
DEF. Y OKE
H.OUT
5V
9V
Q522
H.OUT
TP-B1
FOCUS
12V
T522
HVT
IC541
12V REG
SCREEN
EHV
No. 56055 No. 560552-62-5
Page 6
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/2)
AV-21PM AV-21PM
FRONT CONTROL PWB ASS' Y
CRT SOCKET PWB ASS' Y
AV21PM
SCG-1232A-H2 (AV-21PM)
No. 56055 2-7 No. 560552-8
Page 7
AV-21PM AV-21PM
MAIN PWB CIRCUIT DIAGRAM (2/2)
FRONT CONTROL PWB ASS’ Y
SCG-1232A-H2 (AV-21PM)
CRT SOCKET
PWB ASS’ Y
No. 56055 No. 560552-62-5
2-102-9
Page 8
FRONT CONTROL PWB CIRCUIT DIAGRAM
AV-21PM AV-21PM
FRONT CONTROL PWB ASS' Y
SCG-8001A-H2 (AV-21PM)
No. 56055 2-7 No. 560552-8
2-11
2-12
L01
DEG COIL
QQW0067-001
Page 9
CRT SOCKET PWB CIRCUIT DIAGRAM
MAIN
PWB
ASS' Y
AV-21PM AV-21PM
CRT SOCKET
MAIN
PWB
ASS' Y
SCG-3001A-H2 (AV-21PM)
No. 56055 No. 560552-62-5
2-142-13
Page 10
AV-21PM AV-21PM
PATTERN DIAGRAMS
MAIN PWB PATTERN
TP-E
( )
TP-91
(B1)
( )
FRONT
No. 56055 2-7 No. 560552-8
2-15
2-16
Page 11
FRONT CONTROL PWB PATTERN
AV-21PM AV-21PM
FRONT
( )
No. 56055 No. 560552-62-5
2-182-17
Page 12
CRT SOCKET PWB PATTERN
AV-21PM AV-21PM
TOP
( )
VICTOR COMPANY OF JAPAN, LIMITED
TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan
No. 56055 2-7 No. 560552-8
2-19
2-16
Printed in Japan
CTH 0008
CRT
Loading...