JVC AV-2154WE, AV-21WX14, AV-21WX14G, AV-21WX14S, AV-2154W User Manual

...
SCHEMATIC DIAGRAMS
FLAT COLOUR TELEVISION
YA11320048
AV-21WS24, AV-21WX14/G, AV-21WX14
CD-ROM No.SML200410
BASIC CHASSIS
CW
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YA113
2004/9
AV-21WS24, AV-21WX14/G,AV-21WX14/s, AV-2154W

STANDARD CIRCUIT DIAGRAM

NOTE ON USING CIRCUIT DIAGRAMS
/E
1.SAFETY
The components identified by the symbol and shading are critical for safety. For continued safety replace safety ciritical 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
(2)Setting positions of each knob/button and variable resistor
(3)Internal resistance of tester
(4)Oscilloscope sweeping time
(5)Voltage values
Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.
: Original setting position when shipped
: DC 20k/V
: H
: V
: Othters
: All DC voltage values
20µs / div
5ms / div
Sweeping time is specified
3.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board
: R209
R209
Type
No indication
MM PP MPP
MF TF BP
TAN
(3)Coils
No unit
Others
(4)Power Supply
Respective voltage values are indicated
(5)Test point
: Test point
(6)Connecting method
: Ceramic capacitor : Metalized mylar capacitor
: Polypropylene capacitor : Metalized polypropylene capacitor : Metalized film capacitor : Thin film capacitor : Bipolar electrolytic capacitor : Tantalum capacitor
: [µH]
: As specified
: B1
: 9V
: Connector
: Receptacle
: Only test point display
: Wrapping or soldering
: B2 (12V
: 5V
)
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit : [Ω]
K M
Rated allowable power No indication : 1/16 [W]
Others : As specified
Type
No indication
OMR
MFR
MPR
UNFR
FR
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
Capacitance value
1 or higher : [pF]
less than 1
Withstand voltage
No indication : DC50[V]
Others : DC withstand voltage [V]
AC indicated Electrolytic Capacitors
47/50[Example]: Capacitance value [µF]/withstand voltage[V]
: [k]
: [M]
: Carbon resistor
: Oxide metal film resistor
: Metal film resistor
: Metal plate resistor
: Uninflammable resistor
: Fusible resistor
: [µF]
: AC withstand voltage [V]
(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 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.
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.
)
(No.YA113)2-1

CONTENTS

SEMICONDUCTOR SHAPES .................................................................................................................................... 2-2
USING P.W.BOARD ........................................................................................................................................................ 2-2
BLOCK DIAGRAM ............................................................................................................................................................2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/3) ...............................................................................................................................2-5
MAIN PWB CIRCUIT DIAGRAM (2/3),( 3/3) ..................................................................................................................... 2-7
PATTERN DIAGRAMS
MAIN PWB PATTERN ......................................................................................................................................................... 2-9
VOLTAGE CHART .......................................................................................................................................................... 2-11
WAVEFORMS ................................................................................................................................................................... 2-12
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
TOP VIEWBOTTOM VIEW FRONT VIEW
OUT
E
IN
IN E OUT
1N
1N
1N
CHIP IC
TOP VIEW
1
N
1
N
USING P.W.BOARD
P.W. BOARD ASS’Y NAME AV-21WS24 AV-21WX14/G AV-21WX14/S AV-2154W/E
MAIN P.W. BOARD SCW-1037A-H2 SCW-1029A-H2 SCW-1030A-H2 SCW-1031A-H2
2-2(No.YA113)
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