Chapter 5 279
Troubleshooting the IF Section
Troubleshooting the A15 Motherboard Assembly
IOB14 47 52 53
IOB15 18 23 24
LBIO 5
10
c
11
LINE_TRIG
18
c
60
LOG_LIN
52
c
31
LPWRON 19
59
c
LTIO
24
c
25
REF_CAL
53
cb
SWEEP_RAMP
b
51
c
28
VIDEO_IF
2
c
11
VTO_TUNE 11
29
b,c
a. 8590 E-Series, 8591C and 8594Q only.
b. Refer to the figure, “A15 Connectors with Additional Associated Circuitry” in this section.
c. Pin numbers indicate assembly where signal or voltage originates.
Table 5-7 A15 Motherboard Pin Designations (Continued)
Mnemonic Instrument Assemblies Card
Cages
a
A7 A8 A9 A11 A12 A13 A14 A16 Slots 1,
2, 3, 4
A15J1
A15J13
A15J7
A15J8
A15J9
A15J10
A15J11
A15J12
A15J2
A15J3,
4, 5, 6
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