Keysight Technologies N5244/5B Service Manual page 107

Troubleshooting
Power Up Troubleshooting
1. Unplug the A23 test set motherboard ribbon cable from the A23 test set
motherboard (refer to
Motherboard" on page
2. Unplug the A23 test set motherboard to A24 IF multiplexer board ribbon
cable from the A24 IF multiplexer board (refer to
the A24 IF Multiplexer Board" on page
3. Unplug the front panel interface cable from the A1 front panel interface
board (refer to
Assembly" on page
4. Remove the A16 SPAM board (refer to
A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
5. Remove the A10 source board (refer to
A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
6. Remove the A5 source board, if present (refer to
the A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
7. Remove the A15 13.5 GHz synthesizer board (refer to
Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
8. Remove the A17 13.5 GHz synthesizer board (refer to
Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
9. Remove the A4 13.5 GHz synthesizer board, if present (refer to
and Replacing the A4–A17 Boards (For analyzers with serial numbers
prefixed MY/SG/US5150 and below)" on page
10.Remove the A14 frequency reference board (refer to
Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed
MY/SG/US5150 and below)" on page
11.Remove the A22 GPIB board (refer to
GPIB Board" on page
the A21 CPU board assembly.
12.Unplug the A55 hard disk drive from the A21 CPU board (refer to
"Removing and Replacing the A55 Solid State Drive (SSD)" on page
The minimum required assemblies to power up the analyzer are:
— A20 power supply
— A19 midplane board
— A18 system motherboard
— A21 CPU board
Keysight N5244B/45B Service Guide
"Removing and Replacing the A23 Test Set
7-38).
"Removing the A1 Front Panel Interface Board and Keypad
7-12).
7-36). Reinstall the A20 power supply assembly and
"Removing and Replacing
7-41).
"Removing and Replacing the
7-20).
"Removing and Replacing the
7-20).
"Removing and Replacing
7-20).
"Removing and
7-20).
"Removing and
7-20).
7-20)
"Removing and
7-20).
"Removing and Replacing the A22
"Removing
7-64).
4-13