Detail Block Diagram (1 Of 3) - Panasonic TY-TP42P8-S Service Manual

9.3.

Detail Block Diagram (1 of 3)

Signal explanations
Signal Function
AD0-6 Address signals to switch LEDs and photo-transistors
SEL0-3 Selection signals for the LED and photo-transistor boards.(active LOW)
Selection for 3 to 8 line decoder.
3 TO 8 LINE DECODER(X-PHOTO:U1,X-LED:U3)
G2A C B A Y0 Y1 Y2 Y3 Selection board
L L L L L X-PHOTO 1 & X-LED 1
L L L H L X-PHOTO 2 & X-LED 2
L L H L L X-PHOTO 3 & X-LED 3
L L H H L X-PHOTO 4 & X-LED 4
RANGE1-2 Signals to change photo-transistor gain.
PHCOM1-4 Photo-transistor output signal(analog voltage) output
from each photo-transistor board.
LEDON Signals to light IR-LED.(active LOW)
PHON Signals to activate photo-transistor.(active LOW)
CONTROLLER BOARD
FUSE2
U10
USB
VIN2
J1
CONNECTOR
FUSE1
VBUS 1 VIN1
D- 2
D+ 3
U8
USBDM
U7
USBSP
EEPROM
U1
RESET
RESET
RESET
U6
SH2 SH1
+5V
Y1 Y
X
ANALOG
Y1
MULTI-
A
Z
PLEXER
B
C Z1
XTAL
+5V
20MHz
ALARM
+5V
LED
SW1
PEN
MODE
SW
TY-TP42/50P8-S
Detail Block Diagram (1 of 3)
3 TO 8 LINE DECODER(Y-PHOTO:U2,Y-LED:U4)
G2A C B A Y0 Y1 Selection board
L L L L L Y-PHOTO 1 & Y-LED 1
L L L H L Y-PHOTO 2 & Y-LED 2
+5V
U9
OUT1
OUT2
1B
POWER
CONTROL / SW NOR GATE
EN1 1Y
POWER SELECT
EN2 Q2
1A
PWREN
XTAL2 U11
USB DRIVER
6MHz
RS232C
DRIVER
TXD RXD
U3
RXD1 TXD1 TXD0 RXD0
J4
U4
AD0 1 AD0
BUFFER
RES
AD6 7 AD6
U5
SEL0 10 SEL0
SEL3 13 SEL3
LEDON BUFFER 9 LEDON
PHON 8 PHON
RANGE1 14 RANGE1
RANGE2 15 RANGE2
PWE
CPU
PENDATA 16 PENDATA
MD2
PHCOM 20 PHCOM
XTAL
ILEDCOM 21 ILEDCOM
+5V
EXTAL U12
Vref
17 +5V
ROUT1 DAT/GP0
18 +5V
ROUT2 CLK/GP1 INT
19 +5V
PENSW1 GP4 GP2
PENSW2 GP5
ALM
PEN DATA
CONVERTER
PENMODE
Y-PHOTO 2 BOARD
PHCOM
U3
CH0
PHOUT SW
COM INH
U5
PH ON,RANGE1,2
A B C Z
U6
OPTICAL NOISE CANCEL
GAIN CONTROL
+5V
J21
(42inch)
1 7 8 14 15 9 10 13 16 20 21 17 18 19
J11
(50inch)
J10 1 7 8 14 15 9 10 13 16 20 21 17 18 19
U3
PHCOM
CH0
PHOUT SW
COM INH
J9
U5
1
PH ON,RANGE1,2
7
10
13
A B C Z
U6
9
8
OPTICAL NOISE CANCEL
14
GAIN CONTROL
15
16
20
21
17
+5V
18
19
51
TO
X-PHOTO 3 BOARD
(J23:42inch)
J20
(42inch) TO
J10 X-PHOTO 4 BOARD
(50inch)
(J17:50inch)
1 AD0
7 AD6
8 PHON
14 RANGE1
15 RANGE2
9 LEDON
10 SEL0
13 SEL3
16 PENDATA
20 PHCOM
21 ILEDCOM
SEL0-3 17 +5V
+5V
U2
18 +5V
19 +5V
3 TO 8
LINE
DECODER
Y1
U8,U9
SELCOM
(U9:50inch
ONLY)
U4
AD0-2 AD3-6
U7
A B C
8ch 3 TO 8
Q1
ANALOG
LINE
MULTI-
DECODER
INH
PLEXER
COM
X Y Z1
PH.SINK1-8
PH.DRV1-7
(42inch)
PHOTO-TRANSISTOR
MATRIX PH.DRV1-10
(50inch)
P1-P52
(42inch)
P1-P78
(50inch)
Y-PHOTO 1
BOARD
SEL0-3
U2
3 TO 8
LINE
DECODER
Y1
SELCOM
U8,U9
U4
AD0-2 AD3-6
U7
A B C
8ch 3 TO 8
Q1
ANALOG
LINE
MULTI-
DECODER
INH
PLEXER
COM
X Y Z1
PH.SINK1-8
PHOTO-TRANSISTOR NO
+5V J11
MATRIX USE
17
+5V
P1-P78
PH.DRV1-10
18 +5V
19 +5V
21 ILEDCOM
20 PHCOM
16 PENDATA
10 SEL0
13 SEL3
9 LEDON
8 PHON
14 RANGE1
15 RANGE2
1 AD0
7 AD6
TY-TP42/50P8-S
Detail Block Diagram (1 of 3)
TY-TP42P8-S / TY-TP50P8-S