Base Unit (Operation) - Panasonic KX-TG4771B Service Manual

KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B

14.3. Base Unit (Operation)

16pin 1
HOOK1
HOOK2
HOOK_GND
HOOK3
LCD_VDD
LCD_GND
GND
LCD_SID
LCD_SCL
LCD_CD
LCD_RST
LCD_CS
LCD_BLT
LED901
SP_LED
LED903
MEG_LED
LED_GND
LED902
ANS_LED
16
13pin 1
NC
KEYS_C
KEYIN1
KEYIN3
KEYIN2
KEYS_D
KEYS_A
KEYIN4
KEYS_B
KEYIN5
KEYS_F
KEYIN6
KEYS_E
13
SW901
R9 56
R7 56
R11 220
R10 220
R8 220
RED
A K
RED
A K
RED
A K
GND
WHT
1
+
LCD-BACKLIGHT
2
-
BLK
UP ANS
ERASE/MUTE SOFT1
2 1 2 1 1 2 2 1
MSG4
1 2
MSG3
1 2
MSG2
1 2
RPT MSG1
STOP
LOCAT/IN T
2 1 1 2 1 2 2 1
2 3 HOLD/CONF
1
2 1 2 1 2 1 2 1
4 5 6
REDIAL/PAUS E
2 1 2 1 2 1 2 1
7 8 9 FLASH
2 1 2 1 2 1 2 1
* 0 # SP
2 1 2 1 2 1 2 1
KX-TG4771 SCHEMATIC DIAGRAM (Base Unit (Operation))
68
R12 1M
20
C9 1u 25
V0
19
C8 1u 25
V4
18
C7 1u 25
V3
17
C6 1u 25
V2
16
C5 1u 25
V1
15
CAP2N
14
C4 1u 25
CAP2P
13
C3 1u 25
CAP1P
12
CAP1N
11
C10 1u 25
CAP3P
10
VOUT
9
VSS
8
VDD
7
SI
6
SCL
5
A0P
4
/RESET
3
/CS1
2
1
GND
CN903
SOFT3 SOFT2
2 1 2 1
SKIP
1 2
DOWN
1 2
PCB
NC: No Components