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