Text preview for : 16_03_01.pdf part of PANASONIC KX-FT938 SERVICE MANUAL
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+5VA
DB6 DB5 DB7 DB4 R/W RS E V0 VDD
+5VA
+5V 680 R34
VSS
CN2
10
+5V R19 4.7 C17 Z0.22u
9
8
7
5
4
3
2
R47 C28
DG
3.3K 6.3V100u 2.2K
AG
( ) NC
R35
C25
C99
J180p R39 560K
1
6
TO LCD
+5V
R37 Q4 B1ABDF000026 6.3V220u 39K
C26 K0.01u C22 K0.01u
AG ( ) NC TO MIC
MIC+ MICR17 R16
TO DIGITAL
K1KA10B00215 Z0.1u Z0.1u
+5V
CN1
MICIN +5V DG KSTART KLATCH KRXD KTXD KSCLK 1 2 3 4 5 6 7 8
R48
C1
C2
C3
AG
AG
LED1
R1 R2
0 R18 18K R24
TXD 33 RXD 32 SCLK 31 RESET 30 D7 29 D6 28 D5 27 D4 26 E 25 RWB 24 RS 23
2.2K
( )
150
0 R14 R15 R25 820 1K
R3 R4 R5
0 0 0 K330p J120p
0
OPERST 9 NC 10
C13
K0.01u
K330p
C14
270
J120p
K330p
( )
C4
C6
C7
C9
( )
+5V
+5V R50 33
+5VL
KSL0
KSL1
KSL2
KSL4
KSL3
1 KSL2 2 LED6 3 KIN1 4 LED7 5 XLED8 6 XLED9 7 KIN2 8 KIN3 9 XLED10 10 KSL3 11 KIN4
C15
Z0.1u
34 LATCH 35 START 36 LED2 37 LED3 38 LED4 39 VSS-39 40 VDD-40 41 LED5 42 KIN0 43 KSL0 44 KSL1
IC1
LED1 22 XLED15 21 XLED14 20 XLED13 19 VSS-18 18 VDD-17 17 XLED11 16 XLED12 15 KIN7 14 KIN6 13 KIN5 12
R20
4 1 2
R22 100 C19 [4] Z0.1u C16 +5VL K0.01u
4.7K
3 [0] SW39
DOCUMENT TOP SW
+5V
KIN0
KIN1
KIN2 KIN3
KIN4
KIN5 KIN6 KIN7
R21
R23
4.7K
1
KIN0
KIN4
KIN3
KIN2
KIN7
KIN1
KIN6
KIN5
4 3
100 K0.01u
2
SW38 C20
TP1
FAX/START
*
0
#
NAVI LEFT
BOARDCAST
SKEY 6
ERASE
CN5
SW1
SW6
SW11
SW16
SW21
SW26
SW31
SW36 TP2
KSL0
COPY 7 8 MONITOR NAVI DOWN SKEY 3 MENU PLAYBACK
SW2
SW7
SW12
SW17
SW22
SW27
SW32
SW37
KSL1
STOP 4 9 PAUSE NAVI UP SKEY 2 AUTO ANSWER RECORD
SW3
SW8
SW13
SW18
SW23
SW28
SW33
SW29[3]
KSL2
1 2 3 FLASH NAVI RIGHT SKEY 5
SW4
SW9
SW14
SW19
SW24
SW34
KSL3
CALLER ID 5 6 REDIAL NAVI CENTER SKEY 1 SKEY 4
SW5
SW10
SW15
SW20
SW25
SW30
SW35
KSL4
KX-FT938FX : OPERATION BOARD SCHEMATIC DIAGRAM