Service Guide
Agilent Model 54835A/45A/46A Oscilloscopes
Glance
Trigger setup controls set mode and basic parameters
Service Policy
Ease of use with high performance
Display and Graphical Interface
Power
Trigger Setup Auxiliary Trigger Input
Horizontal
In This Book
3 Testing Performance
Contents
Contents 1 General Information
4 Calibrating and Adjusting
5 Troubleshooting
6 Replacing Assemblies
7 Replaceable Parts
8 Theory of Operation
General Information
General Information
Instruments covered by this service guide
Oscilloscopes Covered by this Service Guide
Users Quick Start Guide
Accessories supplied
Accessories supplied
Programmer’s Guide and Programmer’s Quick Reference
Options available
Options available
Accessories available
Accessories available
Chapter 1 General Information
Fan Safety Shield clips onto side of chassis with cover removed
Accessories available
Service Kit includes service software and fan safety shield
Chapter 1 General Information
Chapter 1 General Information
Specifications & characteristics
Specifications & characteristics
Acquisition
Agilent 54845A - 1.5 GHz 2-channel mode
Specifications & characteristics Vertical
Agilent 54835A - 500 MHz 4-channel mode
Agilent 54845A - 1.0 GHz 4-channel mode
Horizontal
Specifications & characteristics
Chapter 1 General Information
0 to -1 s or one full screen width
Specifications & characteristics Trigger
Chapter 1 General Information
Chapter 1 General Information
Specifications & characteristics Display
Measurements
Chapter 1 General Information
Specifications & characteristics FFT
Computer System/ Storage
CAT I and CAT II Definitions
Specifications & characteristics
Chapter 1 General Information
1-13
General Characteristics
Agilent Technologies 54835A/45A/46A general characteristics
Agilent Technologies 54835A/45A/46A general characteristics
Chapter 1 General Information
Agilent Technologies 54835A/45A/46A general characteristics
Chapter 1 General Information
Recommended test equipment
Recommended test equipment
Chapter 1 General Information
Recommended Test Equipment
Preparing for Use
Preparing for Use
Setting Up the Oscilloscope
To inspect the instrument
To inspect the instrument
To connect power
To connect power
A Three-wire Power Cable is Provided
To attach the optional trackball
To connect the mouse or other pointing device
To connect the mouse or other pointing device
To attach the optional trackball
To connect to the LAN card
To connect the keyboard
To connect the keyboard
To connect oscilloscope probes
To connect oscilloscope probes
To connect a printer
To connect a printer
To connect the GPIB cable
To connect an external monitor
To connect an external monitor
To tilt the oscilloscope upward for easier viewing
To tilt the oscilloscope upward for easier viewing
To power on the oscilloscope
To power on the oscilloscope
You Can Configure the Backlight Saver
1 Connect an oscilloscope probe to channel
To verify basic oscilloscope operation
3 Press the Default Setup key on the front panel
4 Press the Autoscale key on the front panel
To clean the instrument
To clean the instrument
To clean the display monitor contrast filter
Chapter 2 Preparing for Use
Specifications
Testing Performance
To test the dc calibrator
Equipment Required
Testing Performance
Testing Interval
Self-Test Verification
Test Record
Specifications
Performance Test Procedures
Operating Hints
3 Press Default Setup to set the oscilloscope to default conditions
To test the dc calibrator
2 Enable the graphical interface
1 Connect the multimeter to the front panel Aux Out BNC
9 The DVM should read near -2.500 V. Record the reading. V2 =
To test input resistance
To test voltage measurement accuracy
To test voltage measurement accuracy
1 Connect the equipment
Equipment Required
2 Press Default Setup to set the oscilloscope to default conditions
9 Select Channel 1 from the Setup menu
16 With the channel keys, set the active channel OFF and the next ON
3 Select Acquisition from the Setup menu
To test offset accuracy
2 Press Default Setup to set the oscilloscope to default conditions
6 Select Channel 1 from the Setup menu
11 Repeat steps 6 through 10 for the other lines in the table
To test bandwidth
To test bandwidth
Specification Equivalent Time
Real Time
487 mV
response dB
= 20log
= 20log 10 0.871 = -1.19dB
20 Select Acquisition from the Setup menu
To test time measurement accuracy
10 Select Acquisition from the Setup menu
Acquisition Setup for Equivalent Time Procedure
Source Selection for Delta Time Measurement
16 Change the signal generator frequency to 100 MHz 10 ns period
New Measurement Settings for Delta Time Measurement
2 Select Acquisition from the Setup menu
7 Clear measurements
Chapter 3 Testing Performance
To test trigger sensitivity
1 Press Default Setup 2 Select Acquisition from the Setup menu
4 Set horizontal time/div to 5 ns/div
5 Turn on Channel 1 and turn off all other channels
17 Adjust the horizontal sweep speed to 1 ns/div
Page
Agilent Technologies
Performance Test Record
394.947 to 395.053 ns
394.922 to 395.078 ns
Agilent 54845A/46A 395 ns ± 53 ps
300 mVpp at 500 MHz
Equipment Required
Calibrating and Adjusting
To check the power supply
Operating Hints
Mainframe Cal Factor Memory Error
Calibrating and Adjusting
Self Calibration Interval and Hardware Adjustments
Equipment Required
Loading New Software
Loading Default Oscilloscope Settings
Calibration Procedures
Chapter 4 Calibrating and Adjusting
To check the power supply
To check the power supply
Chapter 4 Calibrating and Adjusting
Refer to the following figure for testpoint locations
Connect the common lead of the voltmeter to the GND test point
To check the 715 Hz auxiliary output probe compensation squarewave
Flat-Panel Display Specifications
To check the flat panel display FPD
Chapter 4 Calibrating and Adjusting
When to Use this Procedure
5 Click Start
Chapter 4 Calibrating and Adjusting
To check the flat panel display FPD
8 Repeat steps 6 and 7 for all colors
6 Select a color by clicking the radio button for that color
To check the flat panel display FPD
Equipment Required
To run the self calibration
To run the self calibration
Let the Oscilloscope Warm Up Before Running the Self Calibration
Clear Cal Memory Protect to Run self calibration
4 Click Start, then follow the instructions on the screen
To run the self calibration
If calibration fails
Page
Troubleshooting
ESD Precautions
Troubleshooting
Safety
Tools Required
To install the fan safety shield
Default Setup
To troubleshoot the instrument
To troubleshoot the instrument
Troubleshooting
Chapter 5 Troubleshooting
Troubleshooting
To troubleshoot the instrument
B Check the display
Primary Trouble Isolation
A Perform power-up
Primary Trouble Isolation
E Run the Knob and Key selftest and the LED selftest
C Run oscilloscope self-tests
D Check the front panel
Primary Trouble Isolation
Check fan connections and power-on
Chapter 5 Troubleshooting
No Display Trouble Isolation Chart
Power-up
B Check the fan connections
No Display Trouble Isolation
A Remove the cabinet and install the fan safety shield
sequence
Power-on
Chapter 5 Troubleshooting
Power-On Sequence with External Monitor Connected
No Display Trouble Isolation
No Display Trouble Isolation
Chapter 5 Troubleshooting
POST memory test message
Power Supply Trouble Isolation Flowchart
Chapter 5 Troubleshooting
No Display Trouble Isolation
Power Supply Trouble Isolation
Power Supply Trouble Isolation
A Check the power supply voltages
Power Supply Voltage Limits
Power Supply Trouble Isolation
C Replace any shorted assembly
D Override the Remote Inhibit signal
Reconnect Assemblies and Cables
E Check +15 V Bias and Remote Inhibit cabling
F Replace the power supply
Power Supply Trouble Isolation
G Check for the oscilloscope display onscreen
To check probe power outputs
To check probe power outputs
To check the keyboard
To check the keyboard
1 Disconnect the power cord and remove the cover
To check the LEDs
To check the LEDs
Test by Rows
5 When you are finished, click Close
To check the LEDs
To check the motherboard, CPU, and RAM
To check the SVGA display board video signals
To check the SVGA display board video signals
To check the backlight inverter voltages
To check the backlight inverter voltages
POST Code Listing AMI Motherboard only
POST Code Listing AMI Motherboard only
Chapter 5 Troubleshooting
POST Code Listing
POST Code Listing AMI Motherboard only
Chapter 5 Troubleshooting
Uncompressed Initialization Codes
POST Code Listing AMI Motherboard only
Chapter 5 Troubleshooting
Completed post-video ROM test processing. If the EGA/VGA controller is not found, performing
POST Code Listing AMI Motherboard only
Chapter 5 Troubleshooting
The memory size was adjusting for relocation and shadowing. Clearing the Hit message next
POST Code Listing AMI Motherboard only
Chapter 5 Troubleshooting
Required initialization before the Coprocessor test is over. Initializing the Coprocessor next
To configure the motherboard jumpers and set up the BIOS
To configure the motherboard jumpers and set up the BIOS
To configure the motherboard jumpers and set up the BIOS
5-30
Agilent Technologies Service Note Describes Upgrade Details
To configure the motherboard jumpers and set up the BIOS
Configuring the AMI Series 727 Motherboard Jumpers
Chapter 5 Troubleshooting
To configure the motherboard jumpers and set up the BIOS
Series 727 Motherboard Jumpers
A 100-MHz Clock Is Required
AVOID DAMAGE TO THE CPU BY CORRECTLY CONFIGURING THE JUMPERS
fan will cause the CPU to overheat and malfunction
5-33
To configure the motherboard jumpers and set up the BIOS
1 Connect the power cable to the oscilloscope
5 Press F1 to run the WINBIOS setup
To configure the AMI Series 727 WINBIOS Parameters
System Keyboard Absent
6 Do the following within the setup program
WINBIOS Keyboard Commands
Do steps h-l ONLY if Your System has 64 Mb RAM
To configure the motherboard jumpers and set up the BIOS
7 Exit the Setup program, saving the changes you made
Chapter 5 Troubleshooting
Series 727 System Configuration Settings
VRM Connector
Chapter 5 Troubleshooting
Configuring the AMI Series 757 Motherboard for 200 MHz CPU
J5, J6, J7, J8
To configure the jumpers, set J5, J6, J7, J8, and J14 as shown in the following figure. Note that the pairs of pins on J6 and J7 are shorted the pairs of pins on J5 and J8 are open and all pins on J14 are open
Press F2 to load default values and continue
AMI Atlas-III PCI/ISA BIOS Release AMD-K6tm-/200 Checking NVRAM
XXXXXX KB OK WAIT INS Pressed RUN SETUP Press F1 to Run SETUP
Messages Vary Slightly
WINBIOS Keyboard Commands
6 Do the following within the setup program
To configure the motherboard jumpers and set up the BIOS
When to Do this Procedure
c Exit the BIOS Setup and save the changes you made
To configure the motherboard jumpers and set up the BIOS
Series 757 System BIOS Settings with 1.44 Mbyte floppy drive
Configuring the AMI Series 757 Motherboard for 300 MHz CPU
Chapter 5 Troubleshooting
To configure the motherboard jumpers and set up the BIOS
Series 757 Rev D Motherboard Jumpers
The jumpers you must check are J5, J6, J7, J8, J14, J15 and J16. You must also install a 2.2
To configure the motherboard jumpers and set up the BIOS
1 Connect the power cable to the oscilloscope
5 Press F1 to run the WINBIOS setup
3 Connect an external keyboard and a mouse to the oscilloscope
c Under Standard Setup, select Floppy A. Select Not Installed. Exit the Floppy A block. d Under Standard Setup, select Floppy B. Select Not Installed. Exit the Floppy B block
WINBIOS Keyboard Commands
System Keyboard Absent
To configure the motherboard jumpers and set up the BIOS
Series 757 System BIOS Settings with 120 Mbyte floppy drive
1 Set the PWR Power supply type select jumper to
To configure the motherboard jumpers and set up the BIOS
Use this procedure to set the FIC VA-503A motherboard BIOS
To Configure the FIC Series VA-503A Motherboard BIOS Parameters
5-48
To troubleshoot the acquisition system
To troubleshoot the acquisition system
To troubleshoot the acquisition system
Chapter 5 Troubleshooting
Acquisition Trouble Isolation 1 of
To troubleshoot the acquisition system
Chapter 5 Troubleshooting
Acquisition Trouble Isolation 2 of
To troubleshoot the acquisition system
Chapter 5 Troubleshooting
Acquisition Trouble Isolation 3 of
To troubleshoot the acquisition system
A A to D Converter Failed
Return the Known Good Attenuator to Original Channel
C Probe Board failed
E Temperature Sense failed
B FISO failed
D Offset DAC failed
K Interpolator failed
To troubleshoot attenuator failures
To troubleshoot attenuator failures
To troubleshoot attenuator failures
2 Press the Default Setup key, then the Autoscale key
4 Repeat steps 1 through 3 for the remaining input channels
Swapping Attenuators
Chapter 5 Troubleshooting
To troubleshoot attenuator failures
Select About Infiniium... from the Help Menu
Software Revisions
Enable the Graphical Interface
Software Revisions
Page
Replacing Assemblies
ESD Precautions
Replacing Assemblies
Tools Required
3 Protect the instrument by wrapping it in plastic or heavy paper
To return the instrument to Agilent Technologies for service
2 Remove all accessories from the instrument
5 Seal the shipping container securely
To remove and replace the cover
To disconnect and connect Mylar flex cables
1 Disconnect the power cable and remove the cover
To remove and replace the AutoProbe assembly
To remove and replace the AutoProbe assembly
To remove and replace the AutoProbe assembly
3 To replace the AutoProbe assembly, reverse the above procedure
AVOID DAMAGE TO THE RIBBON CABLE AND FACEPLATE
To remove and replace the probe power and control assembly
To remove and replace the probe power and control assembly
Avoid Interference with the Fan
To remove and replace the backlight inverter board
To remove and replace the front panel assembly
To remove and replace the backlight inverter board
To remove and replace the front panel assembly
6-10
9 To replace the front panel assembly, reverse the above procedure
Keep Long Screws Separate for Re-assembly
To remove and replace the keyboard and flat-panel display assemblies
To remove and replace the keyboard and flat-panel display assemblies
6-13
prevent cleaner from corroding FPD connections
PREVENT GLASS BREAKAGE
To remove and replace the keyboard and flat-panel display assemblies
To remove and replace the acquisition board assembly
To remove and replace the acquisition board assembly
Chapter 6 Replacing Assemblies
To remove and replace the LAN interface board
To remove and replace the LAN interface board
To remove and replace the GPIB interface board
To remove and replace the GPIB interface board
Acquisition cable W11 Keyboard cable W16
To separate the scope interface board and SVGA display board
To remove and replace the Option 200 sound card
To remove and replace the Option 200 sound card
To remove and replace the hard disk drive
To remove and replace the hard disk drive
To remove and replace the motherboard
To remove and replace the floppy disk drive
To remove and replace the floppy disk drive
7 Disconnect these cables from the motherboard
To remove and replace the motherboard
6-23
To remove and replace the power supply
To remove and replace the power supply
To remove and replace the fan
To remove and replace the fan
To remove and replace the CPU
To remove and replace the CPU
To remove and replace RAM SIMMs or SDRAM DIMMs
To remove and replace RAM SIMMs or SDRAM DIMMs
To remove and replace an attenuator
To remove and replace an attenuator
Do Not Remove the Attenuators from the Acquisition Board
If You Permanently Replace Parts
Chapter 6 Replacing Assemblies
To remove and replace an attenuator
Removing an Attenuator
To reset the attenuator contact counter
13 Repeat for each channel you need to change
To reset the attenuator contact counter
11 In the Attenuator Channel box, select the channel you are changing
Chapter 6 Replacing Assemblies
To remove and replace an acquisition hybrid
To remove and replace an acquisition hybrid
4 Loosely install the two M2 pan-head screws
The Hybrid Connector
2 Follow the procedure for removing the hybrid
3 Remove the two screws to remove the connector
1 Remove the acquisition board from the instrument
Power Cables and Plug Configurations Exploded Views
Replaceable Parts
Ordering Replaceable Parts Listed Parts Unlisted Parts
Replaceable Parts List
Replaceable Parts
Ordering Replaceable Parts
Power Cables and Plug Configurations
Power Cables and Plug Configurations
Power Cables and Plug Configurations
Chapter 7 Replaceable Parts
Chapter 7 Replaceable Parts
Exploded Views
Exploded Views
Chapter 7 Replaceable Parts
Fan and Acquisition Assembly
Exploded Views
Chapter 7 Replaceable Parts
Power Supply and PC Motherboard
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
120 Mbyte Floppy Drive Configuration for PC Motherboard Configuration
Exploded Views
Exploded Views
FIC VA-503A Motherboard for PC Motherboard Configuration
Chapter 7 Replaceable Parts
W17W20 A15 W14 A5 W11 A19
Chapter 7 Replaceable Parts
Exploded Views
Exploded Views
Sleeve and Accessory Pouch
Chapter 7 Replaceable Parts
Old version
Chapter 7 Replaceable Parts
Attenuator Assembly
Exploded Views
Replaceable Parts List
Replaceable Parts List
Exchange Assemblies
Replaceable Parts List Replaceable Parts
Chapter 7 Replaceable Parts
External Chassis Parts
Chapter 7 Replaceable Parts
Replaceable Parts List Replaceable Parts
Description
Chassis assembly compatible w/FIC motherboard configuration
Replaceable Parts List Replaceable Parts
Adapter board w/ 4 connectors - 120 MB drive to ribbon cables
Chapter 7 Replaceable Parts
PROBE I/O ASSEMBLY older style consists of MP16, MP54, and W13
Replaceable Parts List Replaceable Parts
All Configurations
Chapter 7 Replaceable Parts
Chapter 7 Replaceable Parts
Replaceable Parts List Replaceable Parts
INSULATOR-120 Mbyte FLOPPY DRIVE only on upgraded units
Cables
ACQUISITION CABLE w/ AMP-LATCHr connector on one end
Replaceable Parts List Replaceable Parts
ACQUISITION CABLE w/ AMP-LATCHr connector on each end
Chapter 7 Replaceable Parts
Page
SVGA Display Card GPIB Interface Card Probe Power and Control
Theory of Operation
Block-Level Theory Power Supply Assembly FPD Monitor Assembly
Acquisition System Front Panel Disk Drives Attenuators Motherboard
Chapter 8 Theory of Operation
Theory of Operation
Block-Level Theory
Front Panel
Block-Level Theory
Acquisition System
Disk Drives
SVGA Display Card
Probe Power and Control
Block-Level Theory
GPIB Interface Card
Block-Level Theory
Acquisition Block Diagram
Chapter 8 Theory of Operation
TIME BASE
Acquisition Theory
Attenuator Theory
Attenuator Theory
Acquisition Theory
Acquisition Modes
Acquisition Theory
Scope Interface Board
Page
Product Name
Safety
DECLARATION OF CONFORMITY
Model Numbers
Emissions
Safety
Product Regulations
Immunity
Safety Symbols
Document Warranty
Safety
Hazardous voltage symbol
Exclusive Remedies
Product Warranty
Limitation of Warranty
Assistance
