AV-27D104 AV-27D304
AV-27430 AV-27432
AV-27D104 AV-27D304
AV-27430 AV-27432
AV-27D104
AV-27430
/RA
, AV-27D104
/RA
, AV-27430
/SA
, AV-27D304
/SA
, AV-27432
/RA
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 manufac tures recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
following condit ions.
(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 v oltage values o f signal circui t 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.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 in dicated
(5) Tes t po i nt
:T est point
(6)Connecting method
(7)Ground symbol
:LIVE side ground
:ISOLA TED( NEUTRAL) side ground
:EARTH ground
:DIGITAL ground
5.NOTE FOR REPAIRING SERVI CE
This mode l's p ower circu it is p artly diff erent 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
circ ui t constant s may be subject to chan ge for i mpro vem ent
without any notice.
NOTE
Due improvement in performance, some part numbers show
in th e circui t diag ram may not agree wi th those indicated in
the part list.
When ordering parts, please use the numbers that appear
in th e Parts Li st .
/RA
, AV-27D304
, AV-27432
:Ceramic capacitor
:M etal ized my lar capa c ito r
:Polypropylen e ca pacitor
:Metalized polypropylene capacitor
:Metal ized film capacitor
:Thin film capacitor
:Bipolar electrolytic capacitor
:Tant alum capacitor
µ
:[
H]
:As specified
:B1
:9V
:Only test point display
:Connector
:Receptacle
/SA
:Wrapping or soldering
:B2 (12V)
:5V
/SA
CONTENTS
SEMICONDUCTOR SHAPES ......................................................................2-2
BLOCK DIAGRAM........................................................................................2-3
CIRCUIT DIAGRAMS....................................................................................2- 5
MAIN PWB CIRCUIT DIAGRAM ................................................................................................................ 2-5
PATTERN DIAGRAMS .................................................................................2-9
MAIN PWB P ATTERN ................................................................................................................................ 2-9
CHANNEL CHART (US)..............................................................................2-11
CHANNEL CHART (CA)............................................................................. 2-12
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIE W
E
C
B
ECB
BCE
(G)(D)(S)
FRONT VI EW
ECB
ECB
IC
BOTTO M V IEW FRONT VI EW TOP VIEW
OUT
E
IN
IN OUTE
1 N
1 N
CHIP IC
TOP VIEW
N
N
N
1
N
1
N
TOP VIEW
CHIP TR
1
C
BE
N
No.52102
2-22-1
No.52102
BLOCK DIAGRAM
AV-27D104 AV-27D304
AV-27430 AV-27432
AV-27D104 AV-27D304
A V -27430 AV-27432
INPUT 1
VIDEO
AUDIO
AUDIO
OUT
COMPO-
-NENT
INPUT
INPUT 2
AUDIO
V1
L1
R1
L
R
Y
Pb
Pr
L2
R2
Y/C
Y/Pb/Pr
TU001
TUNER
IF
Y/C
V1
L1/R1
L2/R2
V3
L3/R3
VTV
IC101
IF DET
IC851
AV SW
MPX
IC651
V
Y
C
Y/C OUT
SW
L/R OUT
IC251
Y/C SEP
L/R
Y/C
RM SW
V3
L3
R3
Y
C
R/G/B
L/R
R/G/B
Q301
Q321
CRT
INPUT 3
VIDEO
AUDIO
RGB DRV
CRT SOCKET
PWB
(Within MAIN PWB)
AC IN
MAIN PWB
LF901
D901
IC901
POWER IC
IC702
MEMORY
Y/Pb/Pr
T921
SW.
TRANSF.
IC201
MICOM/V/C/DEF
B1
L/R
HP
IC602
AUDIO AMP
L , R
HV
L R
L/R
L
SP L
R
SP R
Q521
H.OUT
IC421
VERT OUT
H
V
DY01
T521
HVT
FOCUS
SCREEN
(ITC)
No.52102 No.52102
2-3 2-4
Loading...