JVC AV-14F13/PH Service Manual page 34

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AV-14F13
AV-14F33
CONTENTS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
[AV-14F13]
[AV-14F33]
CIRCUIT DIAGRAMS
[AV-14F13]
MAIN PWB CIRCUIT DIAGRAM
MAIN PWB & CRT SOCKET PWB CIRCUIT DIAGRAM
[AV-14F33]
MAIN PWB CIRCUIT DIAGRAM
MAIN PWB & CRT SOCKET PWB CIRCUIT DIAGRAM
PATTERN DIAGRAMS
[AV-14F13]
MAIN PWB PATTERN
CRT SOCKET PWB PATTERN
(Within MAIN PWB )
[AV-14F33]
MAIN PWB PATTERN
CRT SOCKET PWB PATTERN
(Within MAIN PWB )
CHANNEL CHART
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
2
All manuals and user guides at all-guides.com
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.52021
AV-14F13
STANDARD CIRCUIT DIAGRAM
2-2
NOTE ON USING CIRCUIT DIAGRAMS
2-3
2-5
1.SAFETY
The components identified by the
critical for safety. For continued safety replace safety critical
2-7
components only with manufactures recommended parts.
2-9
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
2-11
following conditions.
2-13
(1)Input signal
(2)Setting positions of
each knob/button and
variable resistor
2-15
2-19
(3)Internal resistance of tester
2-17
(4)Oscilloscope sweeping time
2-20
2-21
(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]
,AV-14F33
/PH
/PH
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
:1/ 16 [W]
This model's power circuit is partly different in the GND. The
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
Due improvement in performance, some part numbers show
:DC withstand voltage [V]
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-14F13
AV-14F33
: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
Jul. 2002 No. 52021

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