JVC AV-21KJ1SEF/A /B, AV-21KJ1SNF/A /B, AV-21KJ1SPF/A /B Schematics
AV-21KJ1SEF
/A, /B
AV-21KJ1SNF
AV-21KJ1SPF
/A, /B
/A, /B
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 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
:H
:V
:Others
:All DC voltage values
/V
20µS/div
5mS/div
Sweeping time is
specified
3.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit :[
K
M
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
]
]
:[K
:[M ]
:Carbon resistor
:Oxide metal film resistor
:Metal film resistor
:Metal plate resistor
:Uninflammable resistor
:Fusible resistor
:[µF]
Withstand voltage
No indication :DC50[V]
Others :DC withstand voltage [V]
AC indicated
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
Type
No indication
MM
PP
MPP
MF
TF
BP
TAN
(3)Coils
No unit
Others
:AC withstand voltage [V]
4.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.
:Ceramic capacitor
:Metalized mylar capacitor
:Polypropylene capacitor
:Metalized polypropylene capacitor
:Metalized film capacitor
:Thin film capacitor
:Bipolar electrolytic capacitor
:Tantalum capacitor
µ
:[
H]
:As specified
No.52135
Oct. 2003 No. 52135
2-1
CONTENTS
SEMICONDUCTOR SHAPES........................................................................ 2-2
BLOCK DIAGRAM ........................................................................................ 2-3
CIRCUIT DIAGRAMS .................................................................................... 2-5
MAIN PWB CIRCUIT DIAGRAM ............................................................................................................... 2-5
FRONT AV PWB CIRCUIT DIAGRAM .................................................................................................... 2-19
HEADPHONE PWB CIRCUIT DIAGRAM ............................................................................................... 2-20
PATTERN DIAGRAMS ................................................................................ 2-21
MAIN PWB PATTERN ............................................................................................................................. 2-21
FRONT AV PWB PATTERN ..................................................................................................................... 2-23
HEADPHONE PWB PATTERN ................................................................................................................ 2-24
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW
CHIP TR
E
C
B
ECB
B
(G)E(S)C(D)
ECB
ECB
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.52135
BLOCK DIAGRAM
L
TU201
PLL/VST TUNER
SERVICE
CONNECTOR
IC500
EEPROM
(MEMORY)
I2 C
IC501
CONTROLLER
AUDIO
IF
OUT
IC403
VIDEO PROCESSOR
IC401(MONO)
AUDIO AMP
R
IC701
HP AMP
CRT
IC900
RGB AMP
AC IN
KEYPAD
IR
SENSOR
IC800
SMPS
+115V B+
+12V
+8V
+5V
+5V STBY
SWITCHING
CIRCUITS
SCART1
VIDEO
SVHS FAV
IC600
VER AMP
Q603
HOR DRIVE
VER. DEFL.
HOR. DEFL.
TR601
FBT
No.52135 No.52135
2-42-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM [1/6]
IC501
µ CONTROLLER
0V 0V 0V 0V
MEMORY
(EEPROM)
4.8V
4.8V 4.7V 4.6V
4.8V
1.6V
4.8V
4.8V
0.7V
0V
1.0V
4.8V
4.7V
4.6V
0.1V
0.1V
0.1V
0.3V
0V
0V
0.6V
0.6V
0.6V
3.6V
4.8V
0.2V
0.2V
0.2V
4.8V
4.8V4.8V
4.1V
4.8V
4.8V
4.5V
1.3V
0.4V
4.8V
4.7V
0.5V
1.4V
0V
0V
0V
1.8V
0.5V
4.5V
0V
0.4V
0.4V
0.7V
4.9V
0.1V
0.8V
1.1V
1.1V
1.3V
0.6V
4.8V
0V
0V
IC 501 40
6
2.5V 6.2V 0V 4.7V 0V 4.9V 4.9V 0V 26.9V 0V 0V
IC 501 41
4.5
MAIN PWB
(1/6)
(µ CONTROLLER)
VE-20121217
VE-20127567
VE-20121219
(AV-21KJ1SEF/A)
(AV-21KJ1SNF/A)
(AV-21KJ1SPF/A)
VE-20129868
VE-20129871
VE-20129884
No.52135 No.52135
(AV-21KJ1SEF/B)
(AV-21KJ1SNF/B)
(AV-21KJ1SPF/B)
2-5 2-6
MAIN PWB CIRCUIT DIAGRAM [2/6]
IC403
VIDEO PROCESSOR
MAIN PWB
(2/6)
(VIDEO PROCESSOR)
IC401
AUDIO AMP
(STEREO)
7.2V
7.2V
14.5V
0V
0V
0V
0V
4.92V
4.7V
0V
1.3V
14.6V
7.3V
0.6V
4.4V
4.9V
0V
2.4V
2.4V
4.3V
0V
0V
0V
4.8V
0V
0V
2.2V
7.8V
0V
2.9V
1.6V
3.1V
2.2V
2.4V
2.4V
2.6V
1.8V
0V
3.8V
4.9V
3.0V
2.3V
3.8V
3.8V
7.9V
3.6V
0V
3.8V
0V
4.9V
4.6V
4.7V
4.0V
0.2V
2.5V
6.0V
5.5V
4.7V
3.1V
0V
4.3V
2.3V
VE-20121217 (AV-21KJ1SEF/A)
VE-20127567 (AV-21KJ1SNF/A)
VE-20121219 (AV-21KJ1SPF/A)
VE-20129868 (AV-21KJ1SEF/B)
VE-20129871 (AV-21KJ1SNF/B)
VE-20129884 (AV-21KJ1SPF/B)
0V
3.1V
2.4V
3.1V
1.6V
5.1V
0.1V
4.1V
4.2V
4.2V
4.3V
IC301
AUDIO AMP
(MONO)
7.2V
IC 403 30
4
IC 403 31
3
IC 403 32
4
IC 403 48
6
IC 403 47
6
No.52135 No.52135
2-82-7
2.4V
1.6V
2.4V
0V
2.2V
2.3V
2.3V
4.3V
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