2NP
2-4-27
CT
YC23
LockPin2
5V
TD2-
TD3+
CT1
CT2
LP1
7
9
3
CONFM
GND
2
2
1
LP2
1
TD3-
GRLED_K1
3
GND
GND
TD2+
4
LockPin1
8
5
6
11
8
8
+5V6
TD4+
10
11
TD1-
9
9
SGND
5
6
6
2
3
3
4
+5V6
B9
6
JOB_LED
GND
4
B10
3
SGND
+5V
+5V6
YC30
VO1
VO2
10
2
2
1
YC7
LEFT X-
BOTTOM Y+
1
LED_C
YC6
LED_A
1
2
LED_A
VCOM
BEEP_POWERON
PANEL_RESET
LED_MEMORY
LED_PROCESSING
4
B1
GND
A10
A3
A9
INT_POWERKEY
60 VCOM
YC9
LED_C
2
+5V6
YC15
1
GND
P2C_SDAT
LED_ATTENTION
B5
B4
YC10
GND
B6
5
HUMAN_SENS_FAR
5V0
P2C_SBSY
ANY_KEY
19
20
13
12
13
15
20
17
18
16
LP1
B4
LP2
B8
B2
B1
D+_B
B2
B3
GND_A
LockPin4
AUDIO
LED_PROCESSING
LockPin3
LockPin2
GND_B
LockPin1
PANEL_RESET
BEEP_POWERON
D-_B
VBUS_B
A8
12
11
A10
A1
A3
C2P_SDAT
B10
B1
C2P_SCK
46
54
BO5
BO4
GO4
50 BO0
GO5
48
POL
HUMAN_SENS_NEAR
47
5
3
6
2
3
4
5
4
3
2
B2
B1
B9
B3
B8
B6
B4
B7
B10
41 RO3
44 GO0
42 RO4
GO3
GO2
GO1
43 RO5
4
6
6
5
C2P_SCK
ANY_KEY
5
40
RO0
39 RO1
B9
38
RO2
B10
B6
P2C_SBSY
8
8
15
14
14
P2C_SDAT
LED_ATTENTION
LED_MEMORY
9
A4
10
YC20
12
GRLED_A1
YWLED_A2
13
3
SPEED CONTROL
A1
D-_A
D+_A
A2
A3
VBUS_A
YWLED_K2
GND
+5V6
+5V6
5
1
6
TD4-
HUMAN_SENS_NEAR
4
3
5V0
3
YC12
1
LP3
ID
GND
LockPin3
LockPin2
LockPin1
LP1
LP2
LockPin(2)
DATA -
USB Host
GND
DATA +
VBUS
2
1
3
2
1
3
4
4
5
DATA+
3
5
4
14
5
1
2
7
YC21
DATA-
6
4
KEY5
NC
2
KEY6
NC
LED3
INT_POWERKEY_N
8
9
2
NC
5V0
1
1
2
6
7
8
KEY6
6
9
4
5
1
GND
4
NC
3
5
3
YC8
BOTTOM Y+
4
TOP Y-
RIGHT X+
BOTTOM
RIGHT
3
5V0
TP
LEFT
TOP
1
47
58
52
54
60
57
45
44
46
4
11
10
5
5
10
2
1
4
3
TOP Y-
YC1
RIGHT X+
3
3
2
LEFT X-
12
8
7
GND
INT_POWERKEY_N
11
3
4
6
7
8
9
10
4
6
NC
7
LED3
NC
41
45
43
42
40
39
37
38
35
36
34
33
32
31
30
28
29
YC3
N.C.
DTR
12
3
12
N.C.
17
17
20
27
V6
V5
25
26
N.C.
20
26 V4
RTS
4
DCD
RXD
6
5
24
25
V2
24
V3
SPK
DSR
10
9
8
7
CTS
RI
YC5
2
N.C.
1
2
23
+
20
22
22
21
CKS
23
21
TXD
20 GND
V1
GND
10
N.C.
10
2
N.C.
N.C.
8
1
8
CN3
19
17
19
17
DIO1
LD
18
N.C.
18
6
6
SHL
CTS
16
2
2
N.C.
DIO2
16
14
RI
15
15 GND
PHS CTS
14
9
14
14
PHS RI
GND
PHS DSR
13
12
12
SGND
13 VLS
12
1
+5V
11
DSR
11
SGND
11
13
14
19
14
11
11
12
12
9
4
-
2
TD1+
1
1
4
GND
YC11
A2
LOCKN
YC17
TX0P
GND
A1
TX0N
GND
GND
LCD_OFF
LIGHTOFF_POWERON
GND
5
JOB_LED
6
5V0
1
2
PROCESSING_LED
ATTENTION_LED
MEMORY_LED
5V6
3
4
5
1
2
3
4
19
6
4
13
+5V
12
VLS
5
10
10
10
PHS RXD
9
9
4
11
10
9
7
N.C.
6
KMTXD
7
RTS
11
+5V
2
15
15
3
SGND
SGND
N.C.
9
7
8
8
8
5
SGND
7
SGND
7
7
SGND
KMTXD
6
7
RXD
11
STVU
PHS DCD
UD
DCD
SGND
REV
5V
KMRXD
KMRXD
5
18
5
5
8
5
KMACK
4
4
4
PHS DTR
KMACK
4
9
PHS TXD
2
3
7
5V OUT
18
6
PHS RTS
6
3
DTR
SGND
FG
1
3
16
13
16
13
TXD
12 KMDET
FG
1
3
KMAS
(3CK)
3
3
3.3V2
1
2
NC
2
CN1
M PCB
CN2
1
10 KMDREQ
SGND
3.3V2
1
3
KMDREQ
1
11
YC20
1
VH
1
YC7
5
5
2
2
KMDET
1
NC
2
6
4
4
7
10
8
9
7
8
V12
33
34
V9
CKG
12
6
STVD
GND
VM
GND
30
27
V11
31
32 V10
28
29 V7
V8
37
35 V13
GND
36 V14
A4
AUDIO
A6
B2
A10
A5
A5
A4
B7
B3
B8
A4
B5
B9
B4
B7
B5
B6
P2C_SDIR
A6
A7
A8
B3
A7
A2
A9
A8
A7
B4
B7
B3
B8
1
3
LCD_OFF
GND
2
18
17
GND
LP4
1
1
VBUS
19
YC6
DATA-
DATA +
3
3
3
DATA+
2
2
GND
TX0N
LIGHTOFF_POWERON
DATA -
2
INT_POWERKEY
VBUS
1
LOCKN
DAT2
CD
GND
TX0P
VBUS
GND
VSS
6
VDD
10
LockPin(4)
14
15
16
DAT1
8
9
LockPin(3)
WP
12
COMMON
11
LockPin(1)
13
CD/DAT3
DAT0
7
CMD
VSS
3
YC31
4
CLK
5
1
2
30
27
28
29
ATTENTION
28
PROCESSING
GND
26
27
MEMORY
27
28
29
29
24
22
SCAN0
26
KEY3
25
23
20
21
21
20
23
22
19
KEY1
23
LED2
KEY2
KEY0
21
NC
20
LED0
LED1
17
GND
SCAN1
NC
SCAN3
14
13
16
13
13
KEY5
11
12 SCAN2
KEY4
9
SCAN4
12
KEY4
11
14
14
12
GND
13
10
SCAN4
SCAN2
20
21
22
14
18
15
19
17
19
16
25
25
30
15
16
24
17
18
24
26
15
KEY0
NC
JOB_LED
29
18
30
27
23
26
JOB_LED
25
GND
30
28
MEMORY
PROCESSING
ATTENTION
KEY1
NC
15
LED0
19
22
16
18
17
KEY3
KEY2
LED2
SCAN3
SCAN1
24
SCAN0
LED1
56
49
48
49
51
50
NC
59
59
3
4
NC
3
2
1
4
2
57 OE
BO1
51
BO2
53
52
BO3
1
1
58
2
1
VCOM
53
55
56
55
A6
1
5
5
2
6
6
Relay
Relay
3
A9
A7
A4
A3
HUMAN_SENS_FAR
2
2
JOB_LED
1
7
B5
B1
10
10
7
B2
P2C_SDIR
GND
C2P_SDAT
11
9
A1
A10
A1
A3
A8
A2
A9
A2
A5
A6
4
4
4
A5
16
LP3
YC26
YC22
ID
5
5
GND
VBUS
1
1
1
VBUS
GND
4
4
4
DATA -
2
2
2
DATA +
3
3
3
GND
DATA-
DATA+
MPWB
ID
5
5
LCD
OPPWB-M
Ethernet
Type A+B
SD card
NC
KEY
BOADE
CARD
READER
OPPWB-S
Summary of Contents for TASKalfa 2551ci
Page 1: ...SERVICE MANUAL Published in September 2016 842NP11A 2NPSM06A Rev A TASKalfa 2551ci ...
Page 10: ...This page is intentionally left blank ...
Page 97: ...2NP 1 1 2 74 This page is intentionally left blank ...
Page 259: ...2NP 1 3 162 U486 Details on the modes Figure 1 3 47 Item No Description ...
Page 473: ...2NP 1 5 62 This page is intentionally left blank ...
Page 497: ...2NP 2 1 22 This page is intentionally left blank ...
Page 555: ...2NP 2 3 48 This page is intentionally left blank ...
Page 584: ...Installation Guide DP 770 B Document processor DP 772 Document processor Installation Guide ...
Page 620: ...DP 773 Document processor Installation Guide ...
Page 646: ...PF 791 500 x 2 Paper feeder Installation Guide ...
Page 654: ...PF 810 3000 sheets deck Installation Guide ...
Page 667: ...DF 770 D Document finisher Installation Guide ...
Page 685: ...AK 740 Bridge unit Installation Guide ...
Page 687: ...PH 7A C D Punch unit Installation Guide ...
Page 708: ...DT 730 B Document tray Installation Guide ...
Page 710: ...5 2013 5 302LC56750 01 H F G D D 6 4 3 7 E C D D M4 8 M4 8 M4 8 M4 8 ...
Page 711: ...FAX System W B Installation Guide ...