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5V
TO DIGITAL
0V
CN301
RESET
11
KSCLK
10
KTXD
9
KRXD
8
KLATCH
7
KSTART
6
R301
JOG1
5
470
JOG2
4
R376
(
)
+5V
3
R302
GND
2
470
MICIN
1
R375
(
)
+5V1
TO DIGITAL
CN303
MICIN
1
2
GND
3
SW301
SW306
HELP
SW302
SW307
VOL+
COLLATE
SW303
SW308
VOL-
QUICK SCAN
SW304
SW309
AUTO ANSWER
SW305
SW310
+5V3
IC302
8
2
-2
1
3
4
C355
J180p
R356
330k
R355
6
C356
7
22k
5
0
IC302
-1
1 JOG1
2 GND
3 JOG2
SW351
JOG DIAL
MENU
RECORD
0
9
*
SW316
SW321
SW326
SW311
PLAY
4
MUTE
5
6
MESSAGES
SW312
SW317
SW322
SW327
1
RESOLUTION
2
CALLER ID
SW313
SW318
SW323
SW328
COPY/START
REDIAL/PAUSE
SP-PHONE
FLASH
/SET
SW314
SW319
SW324
SW329
DIRECTORY
IQ-FAX
8
7
INTERCOM
PROGRAM
SW315
SW320
SW325
SW330
+5V3
TO MIC
C353
MIC (+)
K0.015u
MIC (-)
+5V3
NC.....Not Used
+5V3
+5V2
IC301
30
17
RESET
VDD
31
40
SCLK
VDD
32
2
RXD
LED6
33
22
TXD
LED1
34
23
LATCH
RS
35
24
START
R/W
42
25
KIN0
E
3
26
KIN1
D4
7
27
KIN2
D5
8
28
KIN3
D6
11
29
KIN4
D7
12
36
KIN5
LED2
13
37
KIN6
LED3
14
38
KIN7
LED4
43
41
KSL0
LED5
44
5
ERASE
KSL1
XL8
1
6
KSL2
XL9
10
15
KSL3
XL12
4
16
SW331
KSL4
XL11
9
19
XL10
XL13
18
20
GND
XL14
39
21
GND
XL15
LOCATOR
SW332
3
SW333
STOP
SW334
#
SW335
+5V2
LCD CONTRAST
+5V1
0V
LED: ON
5V
LED: OFF
IN USE1
R310
(
)
IN USE2
R311
(
)
NEW MESSAGES
R312
270
5V
+5V2
0V
+5V2
R380
R382
(
)
(
)
SW353
SW352
R317
R315
3
1
3
1
100
4
2
100
4
2
DOCUMENT
DOCUMENT
SET SW
TOP SW
KX-FM90CE-W/KX-FM90HG-W : OPERATION BOARD(PCB3)
+5V2
TO LCD
CN302
5V
1 GND
0V
2 +5V
3 V0
4 RS
5 R/W
TO COB
6 E
7 D0
8 D1
9 D2
10 D3
11 D4
12 D5
13 D6
14 D7
+5V2
LED301
(
)
LED302
(
)
LED303
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