Agilent Technologies 54853A, Service Manual, Page: 8 / 194

Contents
Contents–2
4 Calibration
Equipment Required 4-2
Self Calibration Interval and Hardware Adjustments 4-2
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 flat panel display (FPD) 4-4
To run the self calibration 4-7
5 Troubleshooting
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 5-10
Front Panel Display Debug 5-11
Motherboard Verification 5-13
To configure the motherboard jumpers and setup BIOS 5-16
POST Code Listing 5-19
Front Panel Debug 5-21
Power Supply Trouble Isolation 5-22
Power Board Trouble Isolation 5-24
AutoProbe Board Trouble Isolation 5-25
To check the keyboard; Troubleshooting Procedure 5-26
To check the LEDs 5-27
To troubleshoot the acquisition system 5-28
Software Revisions 5-29
To check probe power outputs 5-30
To check the SVGA display board video signals 5-31
To check the backlight inverter voltages 5-32
6Replacing Assemblies
ESD Precautions 6-2
Tools Required 6-2
To return the oscilloscope to Agilent Technologies for service 6-3
To remove and replace the covers 6-4
To disconnect and connect Mylar flex cables 6-6
To remove and replace the AutoProbe assembly 6-7
To remove and replace the probe power and control board 6-9
To remove and replace the backlight inverter board 6-11
To remove and replace the front panel assembly 6-13
To remove and replace the keyboard and flat-panel display assemblies 6-16
To remove and replace the acquisition board assembly 6-19