Agilent Technologies 45A No Display Trouble Isolation, To check the keyboard To check the LEDs

Contents

Mainframe Cal Factor Memory Error 4-2 Operating Hints 4-3

Loading Default Oscilloscope Settings 4-3 Loading New Software 4-3 Calibration Procedures 4-3

To check the power supply 4-4

To check the 715 Hz auxiliary output (probe compensation squarewave) 4-6 To check the flat panel display (FPD) 4-7

To run the self calibration 4-10

5 Troubleshooting 5-2

Safety 5-2
Tools Required 5-2
ESD Precautions 5-2
Keystroke Conventions 5-2
Default Setup 5-3
To install the fan safety shield	5-3
To troubleshoot the instrument	5-4
Primary Trouble Isolation 5-6
No Display Trouble Isolation 5-9
Power Supply Trouble Isolation	5-13
To check probe power outputs	5-16
To check the keyboard 5-17
To check the LEDs 5-19
To check the motherboard, CPU, and RAM 5-21

To check the SVGA display board video signals 5-22 To check the backlight inverter voltages 5-23 POST Code Listing (AMI Motherboard only) 5-24

To configure the motherboard jumpers and set up the BIOS 5-29 To troubleshoot the acquisition system 5-49

To troubleshoot attenuator failures 5-56 Software Revisions 5-59

6Replacing Assemblies 6-2

ESD Precautions 6-2

Tools Required 6-2

To return the instrument to Agilent Technologies for service 6-3 To remove and replace the cover 6-4

To disconnect and connect Mylar flex cables 6-5
To remove and replace the AutoProbe assembly	6-6
To remove and replace the probe power and control assembly 6-8
To remove and replace the backlight inverter board 6-9
To remove and replace the front panel assembly	6-9

To remove and replace the keyboard and flat-panel display assemblies 6-12 To remove and replace the acquisition board assembly 6-14

To remove and replace the LAN interface board	6-15
To remove and replace the GPIB interface board	6-16

To remove and replace the scope interface board and SVGA display board 6-17 To separate the scope interface board and SVGA display board 6-18

To remove and replace the Option 200 sound card 6-19 To remove and replace the hard disk drive 6-20

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