Service manual

AL-1661CS CIRCUIT DIAGRAM 13 - 22
MCU PWB (IEEE1284Interface section)
C244
0.1u
C245 0.1u
R326
OPEN
C233 100p
C232 100p
C231 100p
C230 100p
CN39 24FMN-BTK-A
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
C235 100p
C234 100p
C236 100p
C229 100p
C238 100p
R319 0J
C237 100p
IC34
74LVX161284
HD
1
A9
2
A10
3
A11
4
A12
5
A13
6
Vcc
7
A1
8
A2
9
GND
10
A3
11
A4
12
A5
13
A6
14
GND
15
A7
16
A8
17
Vcc
18
PLHin
19
A14
20
A15
21
A16
22
A17
23
HLH
24
HLHin
25
C17
26
C16
27
C15
28
C14
29
PLH
30
Vcc-cable
31
B8
32
B7
33
GND
34
B6
35
B5
36
B4
37
B3
38
GND
39
B2
40
B1
41
Vcc-cable
42
Y13
43
Y12
44
Y11
45
Y10
46
Y9
47
DIR
48
R209
10kJ
C240 100p
C239 100p
C241 100p
BR90 22J
1 2 3 4
8 7 6 5
C246 100p
C248 100p
C247 330p
BR89 22J
1 2 3 4
8 7 6 5
C249 100p
R197 10kJ
BR92 22J 1 2 3 4
8 7 6 5
R200 10kJ
BR91 22J 1 2 3 4
8 7 6 5
C242 0.1u
C243 0.1u
R196
3.3KJ
D39
11EQS06
R204 22J
CN28
IEEE1284_CN
D-GND
30
D-GND
26
HLHIN
35
D-GND
27
/INIT
31
D-GND
28
SG
16
D-GND
29
NC
15
SLCT
13
NC
34
Data 0
2
Data 1
3
FG
17
Data 2
4
D-GND
19
Data 3
5
D-GND
20
Data 5
7
D-GND
21
Data 6
8
D-GND
22
/SLCT IN
36
D-GND
23
/AUTO FD
14
D-GND
24
D-GND
25
/D STB
1
PLHOUT
18
/ACK
10
BUSY
11
PE
12
/FAULT
32
Data 4
6
Data 7
9
D-GND
33
Shield
R198 10kJ
/STB
PARAD7 PARAD6
/INIT /ACK BUSY /FAULT
PARAD1
SLCT
PARAD2 PARAD3
/REV
PARAD4
/SLCTIN
PARAD5
/AUTOFD PE
PARAD0
/STB
PARAD7 PARAD6
/INIT /ACK BUSY /FAULT
PARAD1
SLCT
PARAD2 PARAD3
/REV
PARAD4
/SLCTIN
PARAD5
/AUTOFD PE
PARAD0
EN5VVCC3
EN5VVCC3
EN5V
VCC3 EN5V
/INIT
/ACK
/AUTOFD
/STB
PARAD[7..0]
/REV
BUSY
/FAULT
/SLCTIN
PE
SLCT
/OA_RST
(2-D2)
(2-E2)
3.3V 5V
IEEE1284 Connector
F. G
IEEE1284 Driver/Receiver
(2-D2) (2-D2) (2-D2) (2-D2) (2-D2) (2-D2) (2-D2) (2-D2) (2-D2)
To NIC PWB
A A
B B
C C
D D
E E
4 4 3 3 2 2 1 1
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