Siemens MCM-19T1, Service Manual

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N BOARD SCHEMATIC DIAGRAM
MCM-19T1
[Micro, DSP]
1
2
3
4
A
B
C
N
4
A
1
2
3
4
A
B
C
4
A
DIODE
D1001 C2
D1002 A3
D1003 A3
D1017 B2
D1018 A4
IC
IC1001 A3
IC1003 B4
TRANSISTOR
Q1001 A1
Q1002 B2
CONDUCTOR SIDE
COMPONENT SIDE
N BOARD WAVEFORMS
N TO D BOARD CONNECTOR VOLTAGES
CN1001 1/2
pin volt
1 3.93
2 GND
3 GND
4 0.06
5 0.06
6 0.07
7 5.02
8 5.02
9 0.07
10 GND
11 GND
12 1.64
13 1.44
14 3.83
15 1.43
16 4.60
17 1.56
18 1.59
19 1.56
20 1.48
21 4.00
22 --
23 0.01
24 4.16
25 0.01
26 1.39
27 3.41
28 2.36
29 GND
30 3.48
CN1001 2/2
pin volt
1 GND
2 0.46
3 1.32
4 GND
5 1.28
6 0.00
7 5.02
8 1.62
9 1.55
10 2.17
11 GND
12 1.64
13 5.03
14 GND
15 GND
16 -0.42
17 5.02
18 N.C
19 N.C
20 N.C
21 N.C
22 N.C
23 2.52
24 0.00
25 0.00
26 3.64
27 1.07
28 5.06
29 GND
30 GND
CN1003
pin volt
1 GND
2 4.81
3 4.83
4 0.01
5 4.70
6 GND
7 4.35
8 5.02
9 0.47
10 0.04
11 0.48
CN1004
pin volt
1 0.56
2 0.06
3 0.12
4 0.19
5 0.30
6 GND
7 4.54
All voltages are in V
All voltages are in V
B C E
Q1001 0.84 4.47 0.84
Q1002 0.91 5.03 0.91
All voltages are in V
IC1001
pin volt
1 0.03
2 2.95
3 2.92
4 3.41
5 0.01
6 0.01
7 4.92
8 5.02
9 5.02
10 GND
11 5.03
12 0.00
13 0.00
14 -0.41
15 5.06
16 4.16
17 3.92
18 2.48
19 3.83
20 0.32
21 5.02
22 0.12
23 5.03
24 4.70
25 0.03
26 0.03
27 0.46
28 0.19
29 GND
30 4.54
31 5.03
32 0.45
33 0.06
34 4.81
35 4.83
36 4.33
37 4.70
38 0.00
39 5.02
40 5.03
41 GND
42 3.82
43 GND
44 2.41
45 2.31
46 5.06
47 5.06
48 0.06
49 5.02
50 5.02
51 0.12
52 3.64
53 5.07
54 5.02
55 5.03
56 GND
N BOARD IC VOLTAGE LIST
N BOARD TRANSISTOR
VOLTAGE LIST
N BOARD
SEMICONDUCTOR LOCATION
IC
IC1001 A2
IC1002 C3
IC1005 B1
IC1006 A3
IC1007 C2
TRANSISTOR
Q1003 B2
N BOARD
SEMICONDUCTOR LOCATION
3.38V
p-p
(H) 3.56V
p-p
(8MHz)
5.03V
p-p
(V)
5.00V
p-p
(H)
3.25V
p-p
(H)
1 2
3 4
5
4.mcm N schem.p65 5/19/99, 4:24 PM 1
022-83718162
www.chinadse.org
022-83715667