Agilent Technologies ESA-L1500A Installation and operation manual

Part Number E4411–90047 Supersedes E4411–90042
Printed in USA June 2000
Installation Note
Agilent Technologies ESA-L1500A Spectrum Analyzer
Power Supply Upgrade Kit Number E4411-60021

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
shallnotbeliableforerrorscontainedhereinorforincidentalorconsequentialdamagesinconnectionwith
the furnishing, performance, or use of this material.
© Copyright 1998-2000 Agilent Technologies, Inc.

Installation Note E4411–90047 3
E4411-60021 Power Supply Upgrade
Introduction
This kit has been provided to reduce excess noise in the power supply of the ESA-L1500A spectrum
analyzer.
Installation Kit Parts List
Table 1 Parts Kit E4411-60021 Contents
Product Affected: . . . . . . . . . . . . . . . . . . . . . . .. ESA-L1500A Spectrum Analyzer
Serial Numbers: . . . . . . . . . . . . . . . . . . . . . . . US37451286 and Below Require This Upgrade
The Following Exceptions Do Not Require
This Upgrade:
US37451120, US37451121, US37451122,
US37451123, US37451124, US37451143,
US37451203, US37451212, US37451223,
US37451229, US37451230, US37451238,
US37451243, US37451253, US37451256,
US37451261, US37451263, US37451264,
US37451266, US37451268, US37451270,
US37451272, US37451277, US37451279,
US37451281, US37451284
To Be Performed By: . . . . . . . . . . . . . . . . . . . . (X) Agilent Technologies Service Center
(X) Personnel Qualified by Agilent
Estimated Installation Time: . . . . . . . . . . . . . 1.25 Hours
Estimated Verification Time: . . . . . . . . . . . . . 0.5 Hour
Item Quantity Description Part Number
1 1 Daughter Board E4401-60090
2 1 Capacitor, 4700 pF, 100V (small bubble cap. labeled 472K) 0160-4831
3 1 Capacitor, 4700 pF, 250V (rectangular cap. labeled 4n7 Y2) 0160-4439
4 1 Capacitor, 1000 pF, 100V (small bubble cap. labeled 102K) 0160-4574
5 2 Resistor, 10 ohm 0757-0346
6 1 Resistor, 1 ohm 0698-8812
7 1 Insulation Sleeve 0890-0099
8 1 Label, Power Supply Assembly (E4401-60111) 7121-7526
9 1 Label, Power Supply Main Power Board (E4401-60103) 9320-6209
10 1 Installation Note E4411-90047

4 Installation Note E4411–90047
Tools Required
WARNING A High Pot Test—also known as High Potential or Dielectric Withstand
Test—is required after working on the high voltage section of the power
supply. Ensure suitable test equipment is available for this test before
performing this upgrade.
Figure 1 TORX Tool
WARNING Opening covers or removing parts is likely to expose dangerous voltages.
Disconnect the product from all voltage sources before opening covers.
WARNING The spectrum analyzer contains potentially hazardous voltages. Failure
to heed the safety precautions can result in severe or fatal injury.
CAUTION Electrostatic discharge (ESD) can damage or destroy electronic components. All
work on electronic assemblies should be performed at a static-safe workstation.
Refer to the documentation that pertains to your instrument for information
about static-safe workstations and ordering static-safe accessories.
Description Part Number
TORX Hand Driver—Size T10 8710-1623
TORX Hand Driver—Size T15 8710-1622
Soldering Iron and Solder

Installation Note E4411–90047 5
Procedure
Removing the Outer Case
1. Disconnect the spectrum analyzer power line.
2. Carefully place the analyzer on the work surface with the front frame facing down.
Refer to Figure 2.
3. Remove the four screws (1) that hold the rear frame (2) and outer case (4) in place.
4. Pull the instrument outer case and rear frame off toward the rear of the instrument.
CAUTION The Rear EMI Gasket (3) that clips onto the rear panel can come loose. Note the
correct position to reattach the gasket.
Figure 2 Outer Case, Rear Frame Removal

6 Installation Note E4411–90047
Removing the Inner Shield
1. Refer to Figure 3. Remove the 16 screws (2), (3), and (4) attaching the inner shield (1) to the chassis.
If the tracking generator option is installed, the screw labeled (4) will not be present. In that case,
there will be only 15 screws (2) and (3).
Figure 3 Inner Shield Removal

Installation Note E4411–90047 7
2. Refer to Figure 4. The inner shield (1) can now be removed from the chassis.
Figure 4 Inner Shield

8 Installation Note E4411–90047
Removing the Front Frame
Refer to Figure 5.
1. With the instrument still on its face, remove the two screws (1) on the bottom side of the instrument
that secure the front frame to the RF assembly.
2. Place the instrument with the top side facing up. Remove the two screws (2) that secure the front
frame subpanel to the chassis.
3. Slide the front frame (4) forward until it catches on the tabs (3) on the sides of the chassis.
Figure 5 Front Frame Assembly Removal

Installation Note E4411–90047 9
Removing the Power Supply Assembly
Refer to Figure 6.
1. Remove the vibration support bar (2) at the top rear of the instrument by pinching in the ends of the
bar and rotating upward. The support can be removed by sliding it out of the holes in each assembly.
CAUTION If forced, the vibration support can be broken; remove with care.
2. Remove the single screw (3) securing the A5 power supply assembly (4) to the chassis at the rear of
the instrument.
3. Carefully pull up on the power supply assembly to remove it from the motherboard connector.
Figure 6 Vibration Support

10 Installation Note E4411–90047
Removing and Modifying Power Supply Board
Refer to Figure 7.
WARNING Before opening the cover of the power supply, ensure that at least 5
minutes have elapsed since the line power has been disconnected from
the unit. Opening covers any soon is likely to expose dangerous voltages.
1. Remove the four screws (1) securing the top cover (2) to the power supply assembly.
2. Unplug the fan (5) from the power board (3). Remove the top cover with the fan (2).
3. Unplug the incoming power line (7) from the power board (3).
4. Remove the three screws (6) that secure the power board (3) to the casing.
5. Remove the power board (3) from the casing.
Figure 7 Power Supply Assembly 1