JVC AV-27F802 Schematic
AV-27F802
AV-27F802 STANDARD CIRCUIT DIAGRAM
q
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 : Color bar signal
(2)
Setting positions of each knob/button and
variable resistor
(3) Internal resistance of tester : DC 20kØ/V
(4) Oscilloscope sweeping time : H ⇒ 20µS/div
(5) Voltage values : All DC voltage values
: Original setting position when
shipped
:V ⇒ 5mS/div
: Others ⇒ Sweeping time is
specified
9Since the voltage values of signal circuit vary to some extent ac-
cording to adjustments, use them as reference values.
3. INDICATION OF PARTS SYMBOL [EXAMPLE]
• In the PW board : R1209
→
R209
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
: B2(12V)
:9V
:5V
9Respective voltage values are indicated
(5) Test point
: Test point
: Only test point display
4. INDICATIONS ON THE CIRCUIT DIAGRAM
(1) Resistors
Resistance value
•
No unit : [Ø]
K:[KØ]
M:[MØ]
Rated allowable power
•
No indication : 1/10 [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
9Composition 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]
9 Electrolytic Capacitors
47/50[Example] : Capacitance value [µF]/withstand voltage[V]
(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(NEUTRAL)
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 cir-
•
cuit constants may be subject to change for improvement without any notice.
Sep. 2000 No. 51757
AV-27F802
CONTENTS
SEMICONDUCTOR SHAPES ............................................................................................................................ 2-2
BLOCK DIAGRAM ......................................................................................................................................................2-3
CIRCUIT DIAGRAMS................................................................................................................................................ 2-5
MAIN PWB CIRCUIT DIAGRAM
MAIN, FRONT, POWER SW PWB CIRCUIT DIAGRAMS
PIP PWB CIRCUIT DIAGRAM
AV SW PWB CIRCUIT DIAGRAM
CRT SOCKET PWB CIRCUIT DIAGRAM
DAF PWB CIRCUIT DIAGRAM
LF PWB CIRCUIT DIAGRAM
PATTERN DIAGRAMS ...........................................................................................................................................2-21
MAIN PWB PATTERN .........................................................................................................................
AV SW, CRT SOCKET, DAF, FRONT, POWER SW, LF PWB PATTERN
PIP PWB PATTERN ............................................................................................................................
.................................................................................................................................. 2-5
................................................................................... 2-9
.................................................................................................................................... 2-11
............................................................................................................................. 2-13
.............................................................................................................. 2-15
.................................................................................................................................. 2-17
...................................................................................................................................... 2-19
2-21
..................................................... 2-23
2-25
SEMICONDUCTOR SHAPES
TRANSISTOR
E
C
B
ECB
IC
OUT
E
IN
IN E OUT
CHIP IC
N
N
EC
B
(G)(D)(S)
ECB
1N
TOP VIEW
1
ECB
1N
TOP VIEWBOTTOM VIEW FRONT VIEW
CHIP TR
C
B
E
TOP VIEWBOTTOM VIEW FRONT VIEW
1N
N
1
N
2-2 No.51757
N
BLOCK DIAGRAM
AV-27F802 BLOCK DIAGRAM
AV-27F802 AV-27F802
J602
COMPONENT
VIDEO-IN
J601
COMPONENT
VIDEO-IN
PIP PWB
AV SW PWB (1/2)
J501
INPUT1
J502
INPUT4
J504
INPUT2
J503
OUTPUT
J401
INPUT3
TU001
TUNER
RY
BY
Y
RY
BY
Y
SCL
SDA
TU001
TUNER
S-VIDEO
VIDEO
AUDIO L/MONO
AUDIO R
S-VIDEO
VIDEO
AUDIO L/MONO
AUDIO R
AUDIO L/MONO
AUDIO R
AUDIO L
AUDIO R
S-VIDEO
VIDEO
AUDIO L/MONO
AUDIO R
IF R, G, B
SCL
SDA
IC601
VIDEO2/VIDEO4
INPUT SELECT
V-PIP(TV)
AFC2
IC301
PIP
CONTROLLER
V-PIP(EXT.)
SCL
SDA
IC501
AV S W
R-Y
B-Y
Y
HP
VP
L/R
L/R
VIDEO
C
Y
IC381
AUDIO SW
OSD-R
OSD-G
OSD-B
MEMORY
VC-R
VC-G
VC-B
IC702
IC371
AMP
SCL
SDA
SCL
SDA
Y
C
IC701
MICRO
COMPUTER
IC101
1 CHIP DECODER
Y
IC151
Y/C SW
C
IF
SIF
MPX
V. OUT
H. OUT
Y
C
Y
C
CF021
CF041
VTV
3D Y/C MODULE PWB
IC201
3D Y/C
SEP.
SCL
SDA
Y
C
Y
Q302, Q303
AMP
SCL
SDA
MTS&TONE/VOL
L/R
L/R
C
IC001
CONTROL
L/R
IC202
MEMORY
Q311, Q312
AMP
CRT SOCKET PWB
IC151
SOUND
ENHACEMENT
AUDIO PROCESSOR
IC401
VERT OUT
Q511
H. OUT
R, G, B
RGB DRIVE
AV SW PWB (2/2)
IC401
AUDIO OUT
L/R
DAF PWB
V01
SP
L
SP
R
V
H
DY01
DEF YOKE
VOL+
VOL- CH+ CH- MENU
FRONT PWB
POWER REMOCON
RECEIVER
POWER SW PWB
ON TIMER
LED
REG.
AC IN
LF PWB
POWER SUPPLY
CIRCUIT
MAIN PWB
No.51757 No.51757
2-3 2-4
B1
T502
FBT
FOCUS
SCREEN
HV
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM
AV-27F802 AV-27F802
3D Y/C MODULE SAC-0Y501A
INPUT4
INPUT2
8.8V
4.5V
4.9V
0V
3.2V0V
4.2V
4.2V
4.2V
2.4V
7V
2.6V
2.6V
2.6V
4.3V
0V
0V
3.1V
3.1V
4.5V
0V0V
4.6V
IC101
47
1.0Vp-p(H
5.7
8.8
V
V
5.1
V
5.1
V
42
)
0.68Vp-p(H
)
8.8V
4.8V
4.1V
8.8V
4.6V
4.6V
0V
4.5V
0V
4.9V
2.4
2.1V
V
0V
4.8V
2.5V
8.8
V
3.3
2.4
3.8
V
V
4V
V
2.1V
8.8V
4.4
3.8
V
V
2.3V
1.6V
2.1V
8.8V
7V
5.7V
3.1
V
2.3V
2.2V
3.1V
2.3V
2.4V
8.8V
2.5V
0V 4.8V
3.9V
8.9V
6.8V
1.9V
3.1V
0.6V
0V
0V
0.9
0V
V
2.7V
3.3V
4.9V
8.8V
4V
3.4V
3.2
3.3V
V
4.2V
2.6V
3.3V
3.7V
IC101
1.9Vp-p(V
CNMD1
CNMD1
38
2.2Vp-p(H
1.6Vp-p(H
CNMD1
2.1Vp-p(H
)
4.9V
27
)
24
)
17
)
11.8V
2.6V
4.9V
3.3
V
11.8V
4.9V
15.7
V
8.8
V
12.7V
4.9
V
34
IC101
)
3.7V
3.1V
4.7V4.6V
2.4V
2.7V
4.7V
31.6V
0V
1.8V
8.8V
1.1V
4.9V
4V
3V
3.1V
1.7V
1.7V
0.6V
7.3
V
2.8V
4.8V
2.4V
2.4V
2.5V
0V3V0V
2.2V
2.2V
2.2V
8.9V
2.4V
2.7V
3.1V 0V
5.9V
1.5V
4.6
V
4.6Vp-p(H
8.8
V
9V
8.4
V
MAIN PWB ASS'Y
SAC-1501A-M2
CRT SOCKET
PWB
No.51757 No.51757
2-5 2-6
14
4.0Vp-p(H
IC101
15
)
3.5Vp-p(H
16
3.5Vp-p(H
)
)
MAIN PWB CIRCUIT DIAGRAM
AV-27F802 AV-27F802
PWB
37
)
TO INNER PIN PB
DAF
PWB
FOR ADJ.
CONNECTOR
TO CRT SOCKET PWB
4.4V
IC401
TO DAF PWB
11.8
V
3.9V
60Vp-p(V
2
IC401
)
32Vp-p(V
LF
0V
0.6V
14.1
2.5V2.5
-11.7V
V
V
0.2
14.6V
V
0.6V
-14.3V
1.4V
0V
0.7V
5V
4.4V
5V
5V
0V
)
17.6V
1100Vp-p(H
133V
764
T502 T502
)
150Vp-p(H
82
T502
90Vp-p(H
150Vp-p(H
T502
)
100Vp-p(H
T502
)
33Vp-p(H
T502
)
6Vp-p(V
)
9
)
B
Q501
0V
18.6V
155V
0V
1.8V
0V
5V
4.9V
PC921
TLP621(B
134V
)
11.2V
-12.2V
0.8Vp-p(H)140Vp-p(H
Q501
C
)
3.9V
0.6V
3.8V
-0.1V
3.2V
Q511
2.4Vp-p(H
B
)
0.6V
0.2V
72.4
V
3.4V
SAC-1501A-M2
No.51757 No.51757
2-82-7
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