JVC PD-42V31BJE Serviceanleitung Seite 53

PD-42V31BJE, PD-42V31BSE, PD-42V31BUE
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
c r i t i c a l c o m p o n e n t s o n l y w i t h m a n u f a c t u r e s
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 : Original setting position when
shipped
(3) Internal resistance of tester : DC 20kΩ/V
(4) Oscilloscope sweeping time : H ⇒ 20µs/div
⇒ 5ms/div
: V
: 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]
•
: R1209 → R209
In the PW board
4. INDICATIONS ON THE CIRCUIT DIAGRAM
(1) Resistors
•
Resistance value
No unit : [Ω]
k : [kΩ]
M : [MΩ]
•
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]
AC indicated : AC withstand voltage [V]
Others : DC withstand voltage [V]
∗
Electrolytic Capacitors
47/50[Example] : Capacitance value [µF]/withstand voltage[V]
•
Type
No indication : Ceramic capacitor
MY : Mylar capacitor
MM : Metalized mylar capacitor
P P : Polypropylene capacitor
MPP : Metalized polypropylene capacitor
MF : Metalized film capacitor
TF : Thin film capacitor
BP : Bipolar electrolytic capacitor
TAN : Tantalum capacitor
(3) Coils
No unit : [µH]
Others : As specified
(4) Power Supply
: B1
: B2(12V)
: 9V
: 5V
∗
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 the LIVE side GND and
ISOLATED (NEUTRAL) side GND at the same time with a measuring
apparatus (oscilloscope, etc.). 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. YA013
CONTENTS
USING P.W. BOARD
.......................................................................................................................................... 2-3
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM - 1
........................................................................................................................................ 2-4
BLOCK DIAGRAM - 2
........................................................................................................................................ 2-5
CIRCUIT DIAGRAMS [RECEIVER UNIT]
MAIN PWB CIRCUIT DIAGRAM
AV SWITCH PWB CIRCUIT DIAGRAM
AV JACK PWB CIRCUIT DIAGRAM
DIST RELAY PWB CIRCUIT DIAGRAM
DIST PWB CIRCUIT DIAGRAM
MI-COM PWB CIRCUIT DIAGRAM
MI-COM INTERFACE PWB CIRCUIT DIAGRAM
RECEIVER POWER PWB CIRCUIT DIAGRAM
FRONT CONTROL PWB CIRCUIT DIAGRAM
CIRCUIT DIAGRAMS [DISPLAY UNIT]
DISPLAY INTERFACE PWB CIRCUIT DIAGRAM
AUDIO PWB CIRCUIT DIAGRAM
TEMP. SENSOR PWB CIRCUIT DIAGRAM
DISPLAY LED PWB CIRCUIT DIAGRAM
DISPLAY SWITCH PWB CIRCUIT DIAGRAM
LINE FILTER PWB CIRCUIT DIAGRAM
PATTERN DIAGRAMS [RECEIVER UNIT]
MAIN PWB PATTERN
............................................................................................................................................ 2-65
AV SWITCH PWB PATTERN
................................................................................................................................ 2-69
AV JACK PWB PATTERN ..................................................................................................................................... 2-71
FRONT CONTROL PWB PATTERN
DIST RELAY PWB PATTERN ............................................................................................................................... 2-73
DIST PWB PATTERN
............................................................................................................................................ 2-75
MI-COM PWB PATTERN
....................................................................................................................................... 2-79
MI-COM INTERFACE PWB PATTERN
RECEIVER POWER PWB PATTERN
PATTERN DIAGRAMS [DISPLAY UNIT]
DISPLAY INTERFACE PWB PATTERN
AUDIO PWB PATTERN ......................................................................................................................................... 2-85
LINE FILTER PWB PATTERN
.............................................................................................................................. 2-87
TEMP. SENSOR PWB PATTERN
DISPLAY LED PWB PATTERN
DISPLAY SWITCH PWB PATTERN
VOLTAGE CHART [RECEIVER UNIT]
VOLTAGE CHART [DISPLAY UNIT]
WAVEFORMS
....................................................................................................................................................... 2-94
2-1 2-2
....................................................................................................................... 2-3
............................................................................................................................ 2-7
.............................................................................................................. 2-15
................................................................................................................... 2-17
............................................................................................................. 2-19
........................................................................................................................... 2-21
..................................................................................................................... 2-39
............................................................................................... 2-41
................................................................................................. 2-43
.................................................................................................. 2-45
............................................................................................. 2-47
....................................................................................................................... 2-57
....................................................................................................... 2-60
........................................................................................................... 2-61
.................................................................................................. 2-62
............................................................................................................. 2-63
.................................................................................................................... 2-73
................................................................................................................ 2-80
.................................................................................................................. 2-81
.............................................................................................................. 2-83
......................................................................................................................... 2-88
............................................................................................................................ 2-88
.................................................................................................................... 2-88
.................................................................................................. 2-89
....................................................................................................... 2-92
No. YA013