PD-42DX PD-42DX
PD-42DX
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
foll owing conditions.
(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 voltage values of signal circuit 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 uni t :[
K
M
Rated allowable power
No indication :1/ 16 [W]
Others :As specified
Ty pe
No indication
OM R
MFR
MPR
UNFR
FR
Compos ition resi stor 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
Electr olytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
]
:[K
]
:[M ]
:Carbon resistor
:Oxi de met al film resi st or
:Metal film resistor
:Metal plate resistor
:Uninflammable resistor
:Fusible resistor
:[µF]
:AC withstand voltage [V]
Ty pe
No indication
MM
PP
MPP
MF
TF
BP
TAN
(3) Coils
No unit
Others
(4)Power Supply
Respective voltage values are indicated
(5) Tes t poi nt
:Test point
(6)Con necti ng me thod
(7)Ground symbol
:LIVE side ground
:ISOLATED(NEUTRAL) side ground
:EARTH ground
:DIGITAL ground
5.NOTE FOR REPAIRI NG SERVICE
This model's power circuit is partly di fferent in the GND. The
difference of the GND is shown by the LIVE : ( ) side GND and the
ISOLATED(NEUTRAL) : ( ) side GND.Therefore, c are 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 o r 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 co nstant s ma y be subject to chan ge for impro vement
without any notice.
NOTE
Due improvement in performance, some part numbers show
in th e circuit diag ram may not agree with those indicate d in
the part list.
When ordering parts, please use the numbers that appear
in th e Parts List .
:Ceramic capacitor
:Metalized mylar capacitor
:Polypropylene capacitor
:Metalized polypropylene capacitor
:Metalized film capacit or
:Thin film capacitor
:Bipolar electrolytic capacitor
:Tantalum capacitor
µ
:[
H]
:As specified
:B1
:9V
:Only test point display
:Connector
:R ecept acle
:Wrapping or soldering
:B2 (12V)
:5V
CONTENTS
USING P.W. BOARD .......................................................................................................... 2-3
SEMICONDUCTOR SHAPES ........................................................................................... 2-3
BLOCK DIAGRAM - 1 ........................................................................................................ 2-4
BLOCK DIAGRAM - 2 ........................................................................................................ 2-5
CIRCUIT DIAGRAMS [RECEIVER UNIT]
MAIN PWB CIRCUIT DIAGRAM ....................................................................................................................... 2-7
AV SW PWB CIRCUIT DIAGRAM ................................................................................................................... 2-15
AV JACK PWB CIRCUIT DIAGRAM ................................................................................................................ 2-17
SUB TUNER PWB CIRCUIT DIAGRAM ...........................................................................................................2-19
DIST RELAY PWB CIRCUIT DIAGRAM ........................................................................................................... 2-21
DIST PWB CIRCUIT DIAGRAM ....................................................................................................................... 2-23
RECEIVER POWER CIRCUIT DIAGRAM ........................................................................................................2-41
MI-COM INTERFACE PWB CIRCUIT DIAGRAM ............................................................................................. 2-43
MI-COM PWB CIRCUIT DIAGRAM ..................................................................................................................2-45
FRONT CONTROL PWB CIRCUIT DIAGRAM ................................................................................................. 2-47
CIRCUIT DIAGRAMS [DISPLAY UNIT]
DISPLAY INTERFACE PWB CIRCUIT DIAGRAM ............................................................................................2-49
AUDIO PWB CIRCUIT DIAGRAM .................................................................................................................... 2-57
SPEAKER TERMINAL PWB CIRCUIT DIAGRAM ........................................................................................... 2-59
DISPLAY LED PWB CIRCUIT DIAGRAM ........................................................................................................ 2-61
DISPLAY SWITCH PWB CIRCUIT DIAGRAM ................................................................................................ 2-63
LINE FILTER PWB CIRCUIT DIAGRAM ...........................................................................................................2-65
SYSTEM POWER PWB CIRCUIT DIAGRAM ................................................................................................. 2-67
PDP POWER PWB CIRCUIT DIAGRAM .........................................................................................................2-69
PATTERN DIAGRAMS [RECEIVER UNIT]
RECEIVER POWER PWB PATTERN ............................................................................................................. 2-73
MAIN PWB PATTERN ..................................................................................................................................... 2-75
SUB TUNER PWB PATTERN .......................................................................................................................... 2-79
FRONT CONTROL PWB PATTERN ................................................................................................................ 2-81
MI-COM INTERFACE PWB PATTERN ........................................................................................................... 2-81
MI-COM PWB PATTERN ...............................................................................................................................2-83
DIST RELAY PWB PATTERN .......................................................................................................................... 2-84
AV SW PWB PATTERN .................................................................................................................................. 2-85
DIST PWB PATTERN ...................................................................................................................................... 2-87
AV JACK PWB PATTERN ...............................................................................................................................2-91
PATTERN DIAGRAMS [DISPLAY UNIT]
DISPLAY INTERFACE PWB PATTERN ........................................................................................................... 2-93
PDP POWER PWB PATTERN ........................................................................................................................ 2-95
SYSTEM POWER PWB PATTERN ................................................................................................................2-99
SPEAKER TERMINAL PWB PATTERN ..........................................................................................................2-99
AUDIO PWB PATTERN ................................................................................................................................. 2-103
LINE FILTER PWB PATTERN ........................................................................................................................ 2-105
DISPLAY SWITCH PWB PATTERN .............................................................................................................. 2-106
DISPLAY LED PWB PATTERN ..................................................................................................................... 2-106
VOLTAGE CHART [RECEIVER UNIT] ......................................................................... 2-107
VOLTAGE CHART [DISPLAY UNIT] .............................................................................. 2-110
WAVEFORMS .................................................................................................................2-112
No.52088
2-1
2-2
No.52088
PD-42DX
PD-42DX
USING P.W. BOARD
RECEIVER UNIT [TU-42DX]
MAIN P.W. BOARD LCA10045-02D (SMK-1301A)
AV SW P.W. BOARD LCA90068-02C (SMK-0S302A)
AV JACK P.W. BOARD LCA90102-01C (SMK-0J302A)
SUB TUNER P.W. BOARD LCA90069-01C (SMK-0F301A)
DIST RELAY P.W. BOARD LCA90071-01B (SMK-0Z311A)
DIST P.W. BOARD LCA10227-01D (SMK-0Z301A)
RECEIVER POWER P.W. BOARD LCA90066-01C (SMK-9301A)
MI-COM INTERFACE P.W. BOARD LCA90070-01C (SMK-0M311A)
MI-COM P.W. BOARD LCA20002-02C (SMK-0M301A)
FRONT CONTROL P.W. BOARD LCA90065-01C (SMK-8301A)
DISPLAY UNIT [VM-42DX]
DISPLAY INTERFACE P.W. BOARD LCA10212-02B (SSB-7366A)
AUDIO PWB P.W. BOARD LCA90050-04C (SMK-6065A)
SPEAKER TERMINAL P.W. BOARD LCA90049-04C (SMK-6165A)
DISPLAY SWITCH P.W. BOARD LCA90052-04B (SMK-0L365A)
DISPLAY LED P.W. BOARD LCA90051-04C (SMK-0L265A)
LINE FILTER P.W. BOARD LCA90047-04D (SMK-9265A)
SYSTEM POWER P.W. BOARD LCA90048-04D (SMK-9165A)
PDP POWER P.W. BOARD LCA10211-02C (SSB-9066A)
BLOCK DIAGRAM - 1
LIN+/RIN+/-
MAIN CV/Y
MAIN C
IC701
MAIN
MAIN
Y/RY/BY
MAIN
HD/VD
SUB CV/Y
SUB C
SUB
Y/RY/BY
SUB
HD/VD
CHROMA
DECODE
IC801
SUB
CHROMA
DECODE
3D Y/C
SEPARAT
Y/C
YC
IC251
Y/C
DIST PWB
CVBS
CVBS
YCC
YCY
IC802
3L COMB
FILTER
IC702
3L COMB
FILTER
Y/C
IC703
Y/C SW
L/R
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM V IEW
E
C
B
ECB
(G)(D)(S )
IC
B OT TO M V I EW FR O NT V I EW T OP V I EW
OUT
E
IN
IN OUTE
CHIP IC
N
N
BCE
FRONT VI EW
1 N
TOP VIEW
ECB
1
ECB
1 N
TOP VIEW
CHIP TR
1
C
BE
N
MAIN
Y/RY/BY
MAIN
HD/VD
SUB CV/Y
SUB C
SUB
HD/VD
IC005
SDRAM
IC001
3D NR
&
A-D CONVERT
IC003
A-D CONVERT
13.5M
MAIN HD/VD
Y/RY/BY
8
Y/RY/BY
8
27M
SUB HD/VD
IC101,IC201
DIST
PROCESS
Y
PB
PR
10
10
10
IC461
COLOUR
MANAGEMENT
&
OSD
COMPOSION
IC501
A-D
CONVERT
ON SCREEN
RGB
IC901
DVI
FORMAT
CONVERT
&
ENCRYPTION
TMDS_DATA0_N,P
TMDS_DATA1_N,P
TMDS_DATA2_N,P
TMDS_CLK_N,P
N
1
N
No.52088 No.52088
N
2-3 2-4