JVC AV-27F475/S, AV-27F475/Z, AV-27F485/S, AV-27F485/Z Schematics
SCHEMATIC DIAGRAMS
COLOR TELEVISION
YA05320042
AV-27F475 /S, AV-27F475 /Z,
AV-27F485
CD-ROM No.SML200403
/S, AV-27F485 /Z
BASIC CHASSIS
GJ4
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.YA053
2004/3
AV-27F475/S, AV-27F475/Z,
AV-27F485/S, AV-27F485/Z
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 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
: H
: V
: Othters
: All DC voltage values
/V
20µs / div
5ms / div
Sweeping time is
specified
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
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]
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
(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.
: 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
: Only test point display
: Connector
: Receptacle
: Wrapping or soldering
: B2 (12V
: 5V
)
)
No.YA053
2-1
CONTENTS
SEMICONDUCTOR SHAPES ......................................................................2-2
BLOCK DIAGRAM........................................................................................2-3
CIRCUIT DIAGRAMS....................................................................................2-5
MAIN PWB CIRCUIT DIAGRAM ................................................................................................................ 2-5
AV SELECTOR PWB CIRCUIT DIAGRAM ................................................................................................. 2-9
CRT SOCKET PWB CIRCUIT DIAGRAM .................................................................................................. 2-11
FRONT CONTROL PWB CIRCUIT DIAGRAM .......................................................................................... 2-13
LED & POWER SW PWB CIRCUIT DIAGRAM ........................................................................................ 2-14
PATTERN DIAGRAMS .............................................................................. 2-15
MAIN PWB PATTERN .............................................................................................................................. 2-15
AV SELECTOR PWB PATTERN ............................................................................................................... 2-17
CRT SOCKET PWB PATTERN ................................................................................................................. 2-17
FRONT CONTROL PWB PATTERN ......................................................................................................... 2-18
LED & POWER SW PWB PATTERN ........................................................................................................ 2-18
CHANNEL CHART (US) ............................................................................. 2-19
CHANNEL CHART (CA)............................................................................. 2-20
USING P.W. BOARD
PWB ASS'Y nam e AV-27F475/S AV-27F475/Z AV -27F485/S AV-27F485/Z
MAIN P.W. BOARD SGJ-1551A -M2 SGJ-1552A- M2 SGJ-1556A-M2 SGJ-1557A -M2
AV SELECTOR P.W. BOARD SGJ-5506A-M2
CRT SOCKET P.W. BOARD SGJ-3511A- M2 SGJ-3514A -M2 SGJ-3511A- M2 SGJ-3514A -M2
FRONT CONTROL P.W. BOARD SGJ-6506A- M2
LED & POWER SW P.W. BOARD SGJ-7506A -M2
←←←
←←←
←←←
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW
CHIP TR
E
C
B
ECB
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
OUT
E
IN
IN OUTE
CHIP IC
N
N
N
1
N
B
(G)E(S)C(D)
TOP VIEW
1 N
1
N
ECB
ECB
1
1 N
C
BE
N
2-2
No.YA053
BLOCK DIAGRAM
INPUT 3
INPUT 1
INPUT 2
AUDIO
OUT
V3
L3
R3
Y/C
V1
L1
R1
L2
R2
L
R
FRONT
CONTROL
PWB
AUDIO OUT L/R
MPX
L1/R1
L2/R2
VTV
Y/C
IC5501
AV SW
V1
V2
V3
Y/C
L3/R3
IC5001
MTS DECODE
IC5201
V
3L DIGITAL
COMB
FILTER
Y/C
MTS DECODE/AUDIO CONTROL
SURROUND
AV SW PWB
TONE
CONTROL
VOLUME
CONTROL
L/R
CRT SOCKET PWB
Q3304
R/G/B
Q3306
RGB OUT
Q3103
Q3107
VM AMP
Q3109
VM
CRT
VM COIL
INPUT 2
COMPONENT
VIDEO
Y/V2 V2
Pb
Y, R-Y, B-Y
Pr
LF901
TU001
TUNER
IF
D901
IC101
IF DET
VTV
Y IN
V2
Y, R-Y, B-Y
IC911 IC921
POWER REG ERROR AMP
T921
SW
TRANSF.
C IN
Y PROCESS
Y
PC921
VOLTAGE
FEEDBACK
B1
CHROMA
PROCESS
Pb, Pr
Y/C
SYNC.
SEP
VM
SVM_OUT
BASE BAND
PROCESS
R/G/B
CUTOFF/
DRIVE
VERTICAL
PROCESS
H
RGB
SW
H_OUT
IC201
MAIN CPU/CLOSED CAPTION DECODE/
VIDEO PROCESS/RGB PROCESS/
SYNC. SEP/DEF PROCESS
OSD
GENERAT
CLOSED
CAPTION
DECODER
HORIZONTAL
PROCESS
V_OUT
V
MICOM
SDI1
L / R
IC641
SURROUND
(A.H.S)
IC651
BBE
IC621
AUDIO OUT
SPEAKER L
SPEAKER R
IC702
SCL1
MEMORY
DEF
YOKE
V
H
IC421
VERT OUT
Q511
H OUT
V
H
B1
FOCUS
T502
HVT
SCREEN
MAIN PWB
No.YA053 No.YA053
2-42-3
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