Agilent Technologies 8590 Series Service Manual page 276

Table 5-7 A15 Motherboard Pin Designations
Mnemonic
A7
21.4 MHz IF
+10 V
22
+12 V
+15 V 3, 33
+5 V 19, 49
−15 V
4, 34
−8 VT
ACOM 2, 32
ADC_SYNC
ADR0
ADR1
ADR2
Troubleshooting the IF Section
Troubleshooting the A15 Motherboard Assembly
A8 A9
9
c
13, 32
1, 2, b
3, 20,
21,
c
22
9, 10,
b
11,
12,
28,
29,
30,
c
31
4, 5, b
6, 23,
24,
c
25
23
7, 26, 1-8,
27 10,
12,
14,
16,
18,
20
6
36
7
276
Instrument Assemblies
A11 A12
22, 23 1 20
29
b 8, 18
27
10, 20
b
6, 16
1-21, 2-5, 5- 10,
24-26, 7, 9, 15- 19
28, 11-15,
33- 44 17, 19
A13 A14 A16
22, b
44
b
23
b
29
27, 57
b b 8, 38
27 27
25,
26,
55, 56
b 9, 39
25
c
8
1- 21, 1, 3-7, 2, 4,
24-26, 9-24, 6,
28, 26, 32- 37
33- 44 28-30,
32-37,
41-43
c
30
c
11
c
41
c
12
Chapter 5
Card
a
Cages
Slots 1,
2, 3, 4
9, 39
26, 56
10, 40
2, 4, 6,
8, 29,
31-38,
59, 60
27
12
42
13