Panasonic KX-T7740X (serv.man2) Service Manual ▷ View online
4 LOCATION OF CONTROLS
5 CONNECTION
Caution:
Ensure the cord is inserted in the groove to prevent damage to the connector.
6
KX-T7740X-B
6 DISASSEMBLY INSTRUCTIONS
1. Remove the Stand.
2. Remove Screw (A).
3. Remove the Lower Cabinet and Upper Cabinet.
7
KX-T7740X-B
4. Remove the Main Board from the Upper Cabinet.
8
KX-T7740X-B
7 IC DATA
Pin No.
Terminal Name
I/O Function
I/O Setting
Description
1
RE0/Vcref
I
Conp
Reference voltage for comparators
2
TEST/
I
-
Vcc Connection
3
OSC1
I
-
4MHz
4
OSC2
O
-
4MHz
5
RESET
I
-
6
X1
I
-
Not used Vcc Connection
7
X2
O
-
Open
8
GND
-
-
9
D00
I/O
I
Not used GND Connection
10
D01
I/O
I
Spare Open
11
D02
I/O
I
Spare Open
12
D03
I/O
O
DOUT Data Communication
13
D04
I/O
O
DCLR Data Communication
14
D05
I/O
O
KEY/LED-COM0
15
D09
I/O
O
KEY/LED-COM1
16
D10
I/O
O
KEY/LED-COM2
17
D11
I/O
O
KEY/LED-COM3
18
D12
I
I
DI Data Communication
19
D13/INT0
I
I
DI_INT Data Communication
20
R00/INT1
I/O
O
LED0
21
R01/INT2
I/O
O
LED1
22
R02/INT3
I/O
O
LED2
23
R03/INT4
I/O
O
LED3
24
R10
I/O
O
LED4
25
R11
I/O
O
LED5
26
R12
I/O
O
LED6
27
R13
I/O
O
LED7
28
R20
I/O
O
LED8
29
R21
I/O
O
LED9
30
R22
I/O
O
LED10
31
R23
I/O
O
LED11
32
R30
I/O
O
LED12
33
R33
I/O
O
LED15
34
R32/TOD
I/O
O
LED14
35
R31/TOC
I/O
O
LED13
36
R40/EVND
I/O
O
LED16
37
R41/SCK1
I/O
O
LED17
38
R42/SI1
I/O
O
LED18
39
R43/SO1
I/O
O
LED19
40
R60
I/O
O
LED20
9
KX-T7740X-B
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