JVC AV-21BT7EEB, AV-21BT7EES, AV-21BT7ENB, AV-21BT7ENS, AV-21BT7EPB Schematics
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AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
CD-ROM No.SML200201
CONTENTS
NOTE ON USING CIRCUIT DIAGRAMS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
WAVEFORM DIAGRAM
CIRCUIT DIAGRAMS
PATTERN DIAGRAMS
VOLTAGE TABLE
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
2-1
2-2
2-3
2-4
2-5
2-11
2-15
No.51878
Dec. 2001
AV21BT7ENS / AV21BT7ENB
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
foll owin g condition s.
(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)Oscil loscope sweeping time
:H
20µS/div
:V
5mS/div
:Others
Sweeping time is
specified
(5)Voltage values
:All DC voltage values
Sin ce the voltage values of si gnal 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 :[
]
K
:[K
]
M
Rated allowable power
No indication :1/ 16 [ W]
Others :As specified
Ty pe
No indication
:Carbon resistor
OM R
:Oxide metal film resistor
MFR
:Met al film resi stor
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.NOTE FOR REPAIRING SERVICE
This model's power circuit is partly different in the GND. The
difference of the GND is s hown 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 e xample, 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 a ny n otice.
NOTE
Due improvement in performance, some par t numbers show
in th e ci rcuit dia gram may not agree wi th those indicated i n
the part list.
When ordering parts, please use the numbers that appear
in the Part s List .
Ty pe
MM
:Metalized mylar capacitor
PP
:Polypropylene capacitor
MPP
:Metalized polypropylene capacitor
MF
:Metalized film capa citor
TF
:Thin film capacitor
BP
:Bipolar electrolytic capacitor
TAN
:Tantalum capacitor
(3) Coi ls
No unit
:[
µ
H]
Others
:As specified
(4)Power Supply
:B1
:9V
:5V
Respective voltage values are indicated
(5)Test point
:Test p oint
:Only test point display
(6)Connecti ng me thod
:Connector
:Wrapping or soldering
:Receptacle
(7)Ground symbol
:LIVE side ground
:ISOLATED(NEUTRAL) side ground
:EARTH ground
:DIGITAL ground
:[M ]
Capacitance valu e
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 C apacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
No indication
:Ceramic capacitor
:B2 (12V)
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
WAVEFORM DIAGRAM
MAIN PWB
AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
Q802 D
8Vp-p(H) 1.7Vp-p(H) 0.7Vp-p(H) 1.4Vp-p(H)
IC401 6pin IC050 6pin IC050 17pin
IC401 17pin
0.7Vp-p(H) 0.8Vp-p(H) 0.9Vp-p(H) 2Vp-p(H)
IC401 20pin
2Vp-p(H) 2Vp-p(H) 1Vp-p(H) 450Vp-p(H)
IC401 30pin
IC401 21pin
IC401 29pin IC401 19pin
Q605 5pinIC401 40pin
0.6Vp-p(V) 4.8Vp-p(V) 0.5Vp-p(V) 1.2Vp-p
CRT SOCKET PWB
35Vp-p(H) 35Vp-p(H) 35Vp-p(H)
2-4
IC501 34pinIC701 9pinIC401 47pin IC701 1pin
IC901 9pinIC901 8pinIC901 7pin
No.51878
Dec. 2001 No. 51878
AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
CONTENTS
AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
BLOCK DIAGRAM
SEMICONDUCTOR SHA PES
BLOCK DIAGRAM
WAVEFORM DIAGRAM
CIRCUIT DIAGR AMS
MAIN PWB CIRCUIT DIAGRAM
MULTISOUND PWB CIRCUIT DIAGRAM
CRT SOCKET PWB CIRCUIT DIAGRAM
HEADPHONE JACK PWB CIRCUIT DIAGRAM
FRONT AV PWB CIRCUIT DIAGRAM
PATTERN D IAGRAMS
MAIN, FRONT AV & HEAD PHONE JACK PWB PATTERN
MULTISOUND & CRT SOCKET PWB PATTERN
VOLTAGE TABLE
SEMICONDUCTOR SHA PES
TRANSISTOR
BOTTOM V IEW
E
C
B
ECB
BCE
(G)(D)(S )
FRONT VI EW
ECB
ECB
2-2
2-3
2-4
2-5
2-7
2-9
2-9
2-10
2-11
2-13
2-15
TOP VIEW
CHIP TR
C
BE
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
OUT
E
IN
IN OUTE
1 N
1 N
CHIP IC
TOP VIEW
N
N
N
1
N
1
N
1
N
2-2
No.51878No.51878
2-3
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