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Diagnostic Testing and Troubleshooting (2620A/2625A)
Power Supply Troubleshooting
5
5-7
A1U4 MICROPROCESSOR
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
61
NMI
STBY
RES
MP1
MP0
EXTAL
XTAL
Vss
NC
E
P70 RD*
P71 WR*
P72 R/W*
P73 LIR*
P74
P30 D0
P31 D1
P20
P21
DSCLK P22
RX P23
TX P24
DISRX P25
DISTX P26
EESK P27
NC
IRQ1* P50
IRQ2* P51
SWR1 P52
SWR2 P53
SWR3 P54
SWR4 P55
SWR5 P56
SWR6 P57
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
TRIG P60
P61
OPS* P62
EEDO P63
EEDI P64
DTR P65
PFAIL* P66
EECS P67
NC
Vcc
A15 A47
A14 P46
P45 A13
P44 A12
P43 A11
P42 A10
P41 A9
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
P32 D2
P33 D3
P34 D4
P35 D5
P36 D6
P37 D7
P10 A0
P11 A1
P12 A2
P13 A3
P14 A4
P15 A5
P16 A6
P17 A7
Vss
P40 A8
NC
A1TP16
A1TP5
A1TP3
A1TP11
A1TP4
A1TP6
A1TP17
A1TP15
Display
Connector
Option
Interface
RS-232
Connector
A1TP31
A1TP8
A1TP31
A1TP30
A1TP32 A1TP1
A1TP2
A1TP7
A1TP10
Digital
Input
A1TP14
A1TP9A1TP19
A1TP18
A1TP13
A1TP12
A1TP20
s32f.eps
Figure 5-1. Test Point Locator, Main PCA (A1)