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AV-14F71
CONTENTS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM
PATTERN DIAGRAMS
MAIN PWB & CRT SOCKET PATTERN
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
FRONT VIEW
E
C
B
B C E
E C B
(G)(D)(S)
IC
BOTTOM VIEW
OUT
E
IN
1
IN
E
OUT
CHIP IC
TOP VIEW
N
N
N
1
N
2-2
TOP VIEW
CHIP TR
C
E C B
E C B
B
E
FRONT VIEW
TOP VIEW
1
N
1
N
N
1
N
No.51918
STANDARD CIRCUIT DIAGRAM
2-2
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
2-3
The components identified by the
critical for safety. For continued safety replace safety critical
components only with manufactures recommended parts.
2-5
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
2-9
following conditions.
(1)Input 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.
3.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit
K
M
Rated allowable power
No indication
Others
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
less than 1
Withstand voltage
No indication
Others
AC indicated
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
Type
symbol and shading are
No indication
MM
PP
MPP
MF
TF
BP
TAN
: Colour bar signal
(3)Coils
No unit
Others
: Original setting position
(4)Power Supply
when shipped
:DC 20k /V
:H
20µS/div
:V
5mS/div
Respective voltage values are indicated
:Others
Sweeping time is
(5)Test point
specified
:All DC voltage values
:Test point
(6)Connecting method
:R1209
R209
(7)Ground symbol
:LIVE side ground
:ISOLATED(NEUTRAL) side ground
:EARTH ground
:[
]
:DIGITAL ground
:[K
]
:[M
]
5.NOTE FOR REPAIRING SERVICE
This model's power circuit is partly different in the GND. The
:1/ 16 [W]
difference of the GND is shown by the LIVE : (
:As specified
ISOLATED(NEUTRAL) : (
taken for the following points.
:Carbon resistor
(1)Do not touch the LIVE side GND or the LIVE side GND and the
:Oxide metal film resistor
ISOLATED(NEUTRAL) side GND simultaneously. If the above
:Metal film resistor
caution is not respected, an electric shock may be caused.
Therefore, make sure that the power cord is surely removed from
:Metal plate resistor
the receptacle when, for example, the chassis is pulled out.
:Uninflammable resistor
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL)
:Fusible resistor
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.
:[pF]
Since the circuit diagram is a standard one, the circuit and
circuit constants may be subject to change for improvement
:[µF]
without any notice.
:DC50[V]
NOTE
:DC withstand voltage [V]
Due improvement in performance, some part numbers show
in the circuit diagram may not agree with those indicated in
:AC withstand voltage [V]
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.
AV-14F71
: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
:B2 (12V)
:B1
:9V
:5V
:Only test point display
:Connector
:Wrapping or soldering
:Receptacle
) side GND and the
) side GND.Therefore, care must be
Nov. 2001 No. 51918
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