Agilent Technologies ESG series Manual de usuario

Part Number E4400-90388

Printed in USA September 2000 Supersedes: July 2000

Installation Note

Agilent Technologies ESG Series Signal Generators

(A Models) CPU/Motherboard (Q501 relocated to Chassis)

Replacement Kit: Part Number E4400-60238

Notice

The information contained in this document is subject to change without notice.

Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited

to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies

shall notbe liable for errors contained herein or for incidental orconsequential damages in connection with

the furnishing, performance, or use of this material.

Installation Note E4400-90388 3

ESG Series Signal Generators: Part Number E4400-60238

Introduction

This kit enables you to install a replacement CPU/Motherboard and relocate Q501 onto the signal

generator instrument chassis. The relocation of Q501 to the signal generator chassis eliminates the

mechanical stress on this component. You will perform the following major steps:

•check instrument functionality

• disassemble the instrument - external shell, rear panel, PC boards and cables

• remove Q501 and the CPU/Motherboard

• install the new CPU/Motherboard

• install Q501 onto the signal generator’s chassis

• connect Q501 to the CPU/Motherboard

• reassemble, verify, and calibrate the signal generator

Installation Kit Parts List

Product Affected:. . . . . . . . . . . . . . . . . . . . . . . . . . Agilent E4400A, E4420A, E4421A, E4422A, E4430A, E4431A, E4432A

and E4433A Series Signal Generators.

Serial Numbers: . . . . . .. . . . . . . . . . . . . . . . . . . . . All

Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All

To Be Performed By: . . . . . . . . . . . . . . . . . . . . . . . (X) Agilent Technologies Service Center

( ) Personnel Qualified by Agilent Technologies

( ) Customer

Estimated Installation Time: . . . . . . . . . . . . . . . . . 2 hours

Estimated Verification Time: . . . . . . . . . . . . . . . . 8 hours

Item Quantity Description Part Number

1 1 CPU/Motherboard E4400-600011

1Not available as a stand-alone

2 1 Q501 Assembly E4400-60221

3 1 Q501 Plate with PEM E4400-00040

4 1 Q501 Plate without PEM E4400-00041

5 1 Insulator Bushing 0340-1162

6 1 Screw 3MMX10 0515-0374

7 1 Installation Note E4400-90388

4 Installation Note E4400-90388

Tools Required

❏Ratchet 21 in-lb

❏Hand Torque Driver 9 in-lb

❏Hand Torque Driver 6 in-lb

❏Torxdriver T-10

❏Torxdriver T-15

❏5/8 Socket

❏3/16 Socket

❏9/32 Socket

Safety Considerations

WARNING Before you disassemble the instrument, turn the power switch off and

disconnect the line cord. Failure to unplug the Signal Generator can

result in personal injury.

CAUTION Electrostatic discharge (ESD) can damage or destroy electronic components. All

work on electronic assemblies should be performed at a static-safe workstation.

Installation Note E4400-90388 5

Check Instrument Functionality

The functionality check verifies that the signal generator powers up and that the internal instrument

check identifies no errors. The internal check returns an error message if a problem is detected.

1. Turn on power to the signal generator. Let the instrument warm up for at least five minutes.

2. Cycle the power to the signal generator. The green LED should light, and the instrument will

perform a check.

3. When the display illuminates, check to see if the ERR annunciator is on.

NOTE For instruments with Option 1E5, the error message ERROR 514, Reference Oven Cold

occurs whenever the signal generator is first connected to the AC line power. This error cannot

be cleared from the error queue until the internal reference has warmed up (approximately five

minutes).

4. If the ERR annunciator is displayed, review the error messages in the queue by pressing Utility >

Error Info. The first error message in the queue will be shown in the text area of the display. Refer to

the service guide for information about the error message.

If there is more than one error message (each message will be designated as 1 of n, 2 of n, etc.),

continue pressing the View Next Error Message softkey until you have seen all of the messages.

5. When you have resolved all of the error messages, press ClearErrorQueue(s)to delete the messages,

then restart this procedure at step 2.

6 Installation Note E4400-90388

Remove the Signal Generator Covers

1. Turn the signal generator’s power switch off and disconnect the line cord.

2. Refer to Figure 1. Remove the two strap handles (item 1) from each side of the signal generator by

loosening the two handle screws (item 2).

3. Remove the four bottom feet (item 3).

4. Remove the four rear feet (item 4) from the signal generator by removing the four screws (item 5)

that secure them.

5. Slide the signal generator cover (item 6) off the back of the signal generator.

Figure 1 Instrument Cover and Associated Parts

Installation Note E4400-90388 7

6. Refer to Figure 2. Remove the top chassis cover (item 2) by removing the 11 screws (item 1) that

secure it.

Figure 2 Top Chassis Cover Removal

8 Installation Note E4400-90388

7. Refer to Figure 3. Turn the signal generator over and remove the bottom chassis cover (item 3) by

removing the 15 bottom chassis cover screws (item 2).

Figure 3 Bottom Chassis Cover Removal

Installation Note E4400-90388 9

Removing the Rear Panel

1. Refer to Figure 4. Remove the nuts and washers securing the five BNC connectors (item 1) at the

base of the rear panel.

2. Remove the hex screws and washers that secure the AUXILIARY INTERFACE (item 2) and GPIB

connectors (item 3) to the rear panel.

3. Remove the 10 screws (item 4) that secure the rear panel to the signal generator chassis.

4. Pull the rear panel assembly away from the signal generator chassis.

Figure 4 Rear Panel View

10 Installation Note E4400-90388

Remove the PC Boards and Cables

1. Refer to Figure 5. If the signal generator has Option 1EH, remove the Baseband Generator board

(A7).

2. If the signal generator has Option UN3/4, remove the Baseband Generator board (A7) and the

Pattern Ram board (A8).

Figure 5 Instrument’s Top View

Remove the CPU/Motherboard

1. Refer to Figure 5. Disconnect A1W1, A3W1, B1W1, and B2W1 from the CPU/Motherboard (A14).

2. Disconnect W13 and A4W1 from the CPU/Motherboard (A14).

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