Table Of Contents; Standard Circuit Diagram - JVC AV-28X37SUE Service Manual

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AV-28X37SUE, AV-28X37HKE, AV-28X35HKE,
AV-28X37HIE, AV-28H35SUE, AV-28X35HUE,
AV-28H35BUE

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 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
: Original setting position
variable resistor
when shipped
(3)Internal resistance of tester
:DC 20k /V
(4)Oscilloscope sweeping time
:H
20µs/div
:V
5ms/div
:Others
Sweeping time is
specified
(5)Voltage values
:All DC 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
:R1209
R209
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit
:[
]
:[ k
]
K
M
:[M
]
Rated allowable power
No indication
:1/ 16 [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
Composition 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]
Others
:DC withstand voltage [V]
AC indicated
:AC withstand voltage [V]
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
AV-28X37HKE AV-28X35HKE
AV-28X37HIE AV-28H35SUE
AV-28X35HUE AV-28H35BUE
Type
No indication
:Ceramic 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
:[ µ H]
No unit
:As specified
Others
(4)Power Supply
:B1
:9V
Respective voltage values are indicated
(5)Test point
:Test point
:Only test point display
(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 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.
No.52106
AV-28X37SUE
AV-28X37SUE
AV-28X37HKE AV-28X35HKE
AV-28X37HIE AV-28H35SUE
AV-28X35HUE AV-28H35BUE
CONTENTS
SEMICONDUCTOR SHAPES ........................................................................................... 2-2
BLOCK DIAGRAM............................................................................................................. 2-3
MAIN PWB CIRCUIT DIAGRAM ....................................................................................................................... 2-5
POWER & DEF PWB CIRCUIT DIAGRAM ....................................................................................................... 2-9
100Hz PWB CIRCUIT DIAGRAM ..................................................................................................................... 2-11
CRT SOCKET PWB CIRCUIT DIAGRAM ........................................................................................................ 2-15
FRONT CONTROL PWB CIRCUIT DIAGRAM ................................................................................................. 2-17
SIDE CONTROL PWB CIRCUIT DIAGRAM ..................................................................................................... 2-19
AV JACK PWB CIRCUIT DIAGRAM ................................................................................................................ 2-21
MAIN PWB PATTERN ..................................................................................................................................... 2-23
POWER & DEF PWB PATTERN ..................................................................................................................... 2-25
100Hz PWB PATTERN .................................................................................................................................... 2-27
CRT SOCKET PWB PATTERN ....................................................................................................................... 2-29
FRONT CONTROL PWB PATTERN ................................................................................................................ 2-29
SIDE CONTROL PWB PATTERN .................................................................................................................... 2-30
AV JACK PWB PATTERN ...............................................................................................................................2-30
:B2 (12V)
USING P.W. BOARD
:5V
P.W.B ASS'Y
AV-28X37SUE
MAIN PWB
SML-1002A-U2 SML-1902A-U2
POWER & DEF PWB
SML-2002A-U2
100Hz PWB
SML0Z001A-U2
CRT SOCKET PWB
SML-3002A-U2
FRONT CONTROL PWB
SML-8001A-U2
SIDE CONTROL PWB
SML-8101A-U2
AV JACK PWB
SML0J001A-U2
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
E
C
B
IC
BOTTOM VIEW
OUT
E
IN
CHIP IC
N
N
N
1
N
2-1
2-2
AV-28X37HKE
AV-28X35HKE
AV-28X37HIE
AV-28H35SUE
SML-1002A-U2
SML0Z002-U2
FRONT VIEW
B C E
E C B
E C B
(G)(D)(S)
FRONT VIEW
1
1
N
IN
E
OUT
TOP VIEW
1
N
No.52106
AV-28H35BUE
AV-28X35HUE
SML0Z001A-U2
TOP VIEW
CHIP TR
C
E C B
B
E
TOP VIEW
1
N
N

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