Panasonic TY-TP65P8-S - Touch-screen - Wired, Service Manual

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10.2. Detail Block Diagram (1/3)
6
5
4
3
2
1
A B C D E F G H I
USB
POWER
SW
USB-RS232C
CONVERTER
PHOTO-
TRANSISTOR
MATRIX
U5
PHOTO-
TRANSISTOR
TOUCH
PEN
P1
EEPROM
U4
PIC12F629
U6
12MHz
U2
OUTLIGHT
CANCEL,
GAIN
CONTROL
U3
8ch
ANALOG
MULTIPLEXER
U1
+5V
J8
AD3-AD6
AD3-AD6
AD0-AD2
SEL2
LEDON
PHOUT2
3 TO 8 LINE
DECODER
U5
3 TO 8 LINE
DECODER
U6
U2, U4
5V
+
PHOTO-
TRANSISTOR
MATRIX
RESET
IC
U1 WCK
Vref
RES
RS232C
DRIVER
3 TO 8 LINE
DECODER
U5
BUFFER
U3
OUTLIGHT
CANCEL,
GAIN
CONTROL
U7
U8, U9
8ch
ANALOG
MULTIPLEXER
U6
CPU
U2
BUFFER
U4
U11
AD3-
AD6
AD3-
AD6
AD0-AD2
LEDON
PHOUT1
SEL1
RANGE1,2
3 TO 8 LINE
DECODER
U10
20MHz
Y-PHOTO 2 BOARD
J6
J7
CPU/Y-PHOTO 1 BOARD PEN-USB BOARD PEN RECEIVE BOARD
J3 J1
J2 J1
RANGE1,2
IR Ray
J5
1
2
3
4
5
6
7 1
2
3
4
5
6
7
8
10
11
12 10
22
21
AD0
AD1
AD2
AD3
AD4
AD5
AD6
LEDON
PHOUT3
PHOUT4
PHOUT5
SEL1
SEL2
SEL3
SEL4 13
14
15
16
17 SEL1
SEL2
SEL3
SEL4
SEL5
22
21 RANGE1
RANGE2 19 18 RANGE1
RANGE2
1 2 3 4 5 6 7 1 2 3 4 5 6 7 8
10
9
11 1212
10
9
11 1212
1 2 3 4 5 6 7 1 2 3 4 5 6 7 8
13 14 15 16 17 18 19
AD0 AD1 AD2 AD3 AD4 AD5 AD6 LEDON PHOUT3 PHOUT2 PHOUT4 PHOUT5
PENSW1
PENSW2
R-OUT1
R-OUT2
TXDOUTO
RXDOUTO
TXD1
RXD1
PENMODE
9
10
11
12
5
6
7
8
IRDATA 2 2
4
+5VIN
D-
D+ 1
2
3
9
10
11
12
5
6
7
8
4
2 2
18 19
RANGE1 RANGE2
13 14 15 16 17
SEL1 SEL2 SEL3 SEL4 SEL5
TOUCH PEN mode switch
ON (TOUCH PEN)
OFF (HANDWRITING)
SW2
Signal Function
AD0~AD6 Address signals to switch LEDs and phototransistors.
Signal explanations
Selection signals for the LED and phototransistor boards. (active LOW)
SEL1: Selects Y-LED 1 and CPU/Y-PHOTO 1
SEL2: Selects Y-LED 2 and Y-PHOTO 2
SEL3: Selects X-LED 1 and X-PHOTO 1
SEL4: Selects X-LED 2 and X-PHOTO 2
SEL5: Selects X-LED 3 and X-PHOTO 3
Signal to change phototransistor gain.
Phototransistor output signal (analogue voltage) output from each
phototransistor board.
Signal to light IR-LED. (active LOW)
SEL1~5
RANGE1~2
PHOUT1~5
LEDON
TY-TP65P8-S / TY-TPEN6
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