Anritsu 690 B Series User manual

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SERIES
690XXB/691XXB
SYNTHESIZED CW/SIGNAL GENERATORS
MAINTENANCE MANUAL
P/N: 10370-10347
REVISION: C
PRINTED: AUGUST 2003
COPYRIGHT 2003 ANRITSU CO.
490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809

WARRANTY
The Anritsu product(s) listed on the title page is (are) warranted against defects in materials and
workmanship for one year from the date of shipment.
Anritsu's obligation covers repairing or replacing products which prove to be defective during the
warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for
warranty repairs. Obligation is limited to the original purchaser. Anritsu is not liable for consequen-
tial damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear.
Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by
the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifi-
cations of the product. No other warranty is expressed or implied, and the remedies provided herein
are the Buyer's sole and exclusive remedies.
TRADEMARK ACKNOWLEDGEMENTS
Adobe Acrobat is a registered trademark of Adobe Systems Incorporated.
NOTICE
Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers
as a guide for the proper installation, operation, and maintenance of Anritsu Company equipment
and computor programs. The drawings, specifications, and information contained herein are the
property of Anritsu Company, and any unauthorized use or disclosure of these drawings, specifica-
tions, and information is prohibited; they shall not be reproduced, copied, or used in whole or in part
as the basis for manufacture or sale of the equipment or software programs without the prior writt-
ten consent of Anritsu Company.

Table of Contents
Chapter 1 - General Information
1-1 SCOPE OF MANUAL.................1-3
1-2 INTRODUCTION ...................1-3
1-3 DESCRIPTION ....................1-3
1-4 IDENTIFICATION NUMBER ............1-5
1-5 ELECTRONIC MANUAL...............1-5
1-6 RELATED MANUALS ................1-5
Operation Manual ................1-5
GPIB Programming Manual ...........1-5
SCPI Programming Manual ...........1-5
1-7 OPTIONS .......................1-6
1-8 LEVEL OF MAINTENANCE.............1-8
Troubleshooting .................1-8
Repair......................1-8
Calibration ...................1-8
Preventive Maintenance .............1-8
1-9 STATIC-SENSITIVE COMPONENT HANDLING
PRECAUTIONS ...................1-8
1-10 PREVENTIVE MAINTENANCE ..........1-10
1-11 STARTUP CONFIGURATIONS...........1-11
1-12 RECOMMENDED TEST EQUIPMENT ......1-12
1-13 EXCHANGE ASSEMBLY PROGRAM .......1-14
1-14 REPLACEABLE SUBASSEMBLIES AND PARTS 1-14
Chapter 2 - Functional Description
2-1 INTRODUCTION ...................2-3
2-2 690XXB/691XXB MAJOR SUBSYSTEMS ......2-3
Digital Control..................2-3
Front Panel ...................2-4
Frequency Synthesis...............2-4
Analog Instruction................2-5
YIG, SDM, SQM Driver .............2-5
ALC/Modulation .................2-8
690XXB/691XXB MM i

RF Deck.....................2-8
Power Supply ..................2-8
Inputs/Outputs .................2-8
Motherboard/Interconnections ..........2-9
2-3 FREQUENCY SYNTHESIS .............2-9
Phase Lock Loops ................2-9
Overall Operation ...............2-10
RF Outputs 0.00001 to 65 GHz .........2-13
Frequency Modulation (691XXB only) ......2-14
Analog Sweep Mode (691XXB only) .......2-14
Step Sweep Mode................2-15
2-4 ALC AND MODULATION..............2-15
ALC Loop Operation ..............2-15
Amplitude Modulation (691XXB only)......2-18
Square Wave Modulation (691XXB only) ....2-18
2-5 RF DECK ASSEMBLIES ..............2-19
RF Deck Configurations ............2-19
YIG-tuned Oscillator ..............2-20
Power Level Control and Modulation ......2-20
RF Signal Filtering...............2-25
0.01 to 2 GHz Down Converter .........2-26
0.01 to 2.2 GHz Digital Down Converter ....2-27
Switched Doubler Module............2-28
Source Quadrupler Module ...........2-29
Power Level Detection/ALC Loop ........2-30
Step Attenuators ................2-31
Chapter 3 - Performance Verification
3-1 INTRODUCTION ...................3-3
3-2 RECOMMENDED TEST EQUIPMENT .......3-3
3-3 TEST RECORDS ...................3-3
3-4 CONNECTOR AND KEY LABEL NOTATION ...3-3
3-5 690XXB/691XXB POWER LEVELS .........3-6
3-6 INTERNAL TIME BASE AGING RATE TEST ...3-7
Test Setup....................3-7
Test Procedure..................3-8
ii 690XXB/691XXB MM
Table of Contents (Continued)

3-7 FREQUENCY SYNTHESIS TESTS ........3-10
Test Setup ...................3-10
Coarse Loop/ YIG Loop Test Procedure .....3-10
Fine Loop Test Procedure ............3-11
3-8 SPURIOUS SIGNALS TEST: RF OUTPUT
SIGNALS £2 GHz (£2.2 GHz UNITS
W/OPTION 21A) ..................3-12
Test Setup ...................3-12
0.01 - 2 GHz Test Procedure ..........3-12
0.01 - 2.2 GHz Test Procedure..........3-15
3-9 HARMONIC TEST: RF OUTPUT SIGNALS
FROM2TO20GHz ................3-16
Test Setup ...................3-16
2 - 10 GHz Test Procedure ...........3-17
11 - 20 GHz Test Procedure ..........3-18
3-10 SINGLE SIDEBAND PHASE NOISE TEST ....3-20
Test Setup ...................3-20
Test Procedure .................3-21
3-11 POWER LEVEL ACCURACY AND FLATNESS
TESTS........................3-24
Test Setup ...................3-24
Power Level Accuracy Test Procedure ......3-25
Power Level Flatness Test Procedure ......3-26
3-12 AMPLITUDE MODULATION TEST ........3-28
Test Setup ...................3-28
AM Input Sensitivity Procedure.........3-29
3-13 FREQUENCY MODULATION TESTS .......3-31
Test Setup ...................3-31
FM Input Sensitivity Procedure.........3-32
Chapter 4 - Calibration
4-1 INTRODUCTION ...................4-3
4-2 RECOMMENDED TEST EQUIPMENT .......4-3
4-3 TEST RECORDS ...................4-3
4-4 CALIBRATION FOLLOWING SUBASSEMBLY
REPLACEMENT...................4-4
4-5 CONNECTOR AND KEY LABEL NOTATION ...4-4
690XXB/691XXB MM iii
Table of Contents (Continued)

4-6 INITIAL SETUP....................4-7
Interconnection .................4-7
PC Setup — Windows 3.1 ............4-8
PC Setup — Windows 95/Windows 98......4-10
4-7 PRELIMINARY CALIBRATION ..........4-13
Equipment Setup................4-13
Calibration Steps................4-14
Alternate Reference Oscillator Calibration ...4-17
4-8 SWITCHED FILTER SHAPER CALIBRATION ..4-19
Equipment Setup................4-19
Log Amplifier Zero Calibration .........4-20
Limiter DAC Adjustment ............4-20
Shaper DAC Adjustment ............4-22
4-9 RF LEVEL CALIBRATION .............4-23
4-10 ALC SLOPE CALIBRATION (691XXB ONLY). . . 4-24
Equipment Setup................4-24
ALC Slope DAC Adjustment ..........4-25
4-11 ALC BANDWIDTH CALIBRATION ........4-28
Equipment Setup................4-28
Bandwidth Calibration .............4-28
4-12 AM CALIBRATION (691XXB ONLY)........4-30
Equipment Setup................4-30
AM Calibration Procedure ...........4-31
4-13 FM CALIBRATION (691XXB ONLY) ........4-34
Equipment Setup................4-34
FM Calibration Procedure ...........4-35
Chapter5-Troubleshooting
5-1 INTRODUCTION ...................5-3
5-2 RECOMMENDED TEST EQUIPMENT .......5-3
5-3 ERROR AND WARNING/STATUS MESSAGES...5-3
Self-Test Error Messages.............5-3
Normal Operation Error and Warning/
Status Messages ................5-7
5-4 MALFUNCTIONS NOT DISPLAYING AN ERROR
MESSAGE .....................5-10
iv 690XXB/691XXB MM
Table of Contents (Continued)

5-5 TROUBLESHOOTING TABLES ..........5-10
Chapter 6 - Removal and Replacement Procedures
6-1 INTRODUCTION ...................6-3
6-2 REMOVING AND REPLACING THE CHASSIS
COVERS .......................6-4
Preliminary ...................6-4
Procedure ....................6-4
6-3 REMOVING AND REPLACING THE FRONT
PANEL ASSEMBLY .................6-6
Preliminary ...................6-6
Procedure ....................6-6
6-4 REMOVING AND REPLACING THE A3, A5,
ORA6PCB......................6-8
Preliminary ...................6-8
Procedure ....................6-8
6-5 REMOVING AND REPLACING THE A4 PCB . . . 6-8
Preliminary ...................6-8
Procedure ....................6-8
6-6 REMOVING AND REPLACING THE A7 PCB. . . 6-10
Preliminary ..................6-10
Procedure ...................6-10
6-7 REMOVING AND REPLACING THE A9, A10,
A11, OR A12 PCB..................6-10
Preliminary ..................6-10
Procedure ...................6-10
6-8 REMOVING AND REPLACING THE A13
OR A15 PCB ....................6-11
Preliminary...................6-11
Procedure ...................6-11
6-9 REMOVING AND REPLACING THE A14 PCB ..6-11
Preliminary...................6-11
Procedure ...................6-11
6-10 REMOVING AND REPLACING THE A16
OR A17 PCB ....................6-13
Preliminary ..................6-13
Procedure ...................6-13
690XXB/691XXB MM v
Table of Contents (Continued)

6-11 REMOVING AND REPLACING THE A18
OR A19 PCB ....................6-13
Preliminary ..................6-13
Procedure ...................6-13
6-12 REMOVING AND REPLACING THE REAR
PANEL ASSEMBLY.................6-14
Preliminary ..................6-14
Procedure ...................6-14
6-13 REMOVING AND REPLACING THE A21 PCB ..6-17
Preliminary ..................6-17
Procedure ...................6-17
6-14 REMOVING AND REPLACING THE
A21-1/A21-2 PCB ..................6-18
Preliminary ..................6-18
Procedure ...................6-18
6-15 REMOVING AND REPLACING THE FAN
ASSEMBLY .....................6-19
Preliminary ..................6-19
Procedure ...................6-19
Appendix A - Test Records
A-1 INTRODUCTION...................A-1
vi 690XXB/691XXB MM
Table of Contents (Continued)

Table of Contents
1-1 SCOPE OF MANUAL.................1-3
1-2 INTRODUCTION ...................1-3
1-3 DESCRIPTION ....................1-3
1-4 IDENTIFICATION NUMBER ............1-5
1-5 ELECTRONIC MANUAL...............1-5
1-6 RELATED MANUALS ................1-5
Operation Manual ................1-5
GPIB Programming Manual ...........1-5
SCPI Programming Manual ...........1-5
1-7 OPTIONS .......................1-6
1-8 LEVEL OF MAINTENANCE.............1-8
Troubleshooting .................1-8
Repair......................1-8
Calibration ...................1-8
Preventive Maintenance .............1-8
1-9 STATIC-SENSITIVE COMPONENT
HANDLING PRECAUTIONS ............1-8
1-10 PREVENTIVE MAINTENANCE ..........1-10
1-11 STARTUP CONFIGURATIONS...........1-11
1-12 RECOMMENDED TEST EQUIPMENT ......1-12
1-13 EXCHANGE ASSEMBLY PROGRAM .......1-14
1-14 REPLACEABLE SUBASSEMBLIES AND PARTS 1-14
Chapter 1
General Information

Figure 1-1. Typical Series 690XXB/691XXB Synthesized CW/Signal Generator (Model 69187B Shown)

Chapter 1
General Information
1-1 SCOPE OF MANUAL This manual provides service information for all models of the Series
690XXB Synthesized CW Generator and the Series 691XXB Synthe-
sized Signal Generator. The service information includes replaceable
parts information, functional circuit descriptions, block diagrams, per-
formance verification tests, and procedures for calibration, trouble-
shooting, and assembly/subassembly removal and replacement.
(Throughout this manual, the term 690XXB/691XXB is used to refer
to the instrument.) Manual organization is shown in the table of con-
tents.
NOTE
Service information for the series 690XXB CW generators
and series 691XXB signal generators is combined into one
manual because identical model numbers of each series con-
tain the same assemblies, subassemblies, and components.
Differences between the series are noted where applicable
throughout the manual.
1-2 INTRODUCTION This chapter provides a general description of the Series 690XXB/
691XXB Synthesized CW/Signal Generators, identification numbers,
related manuals, and options. Information is included concerning level
of maintenance, replaceable subassemblies and RF components, ex-
change assembly program, and preventive maintenance. Static-
sensitive component handling precautions and lists of exchangeable
subassemblies and recommended test equipment are also provided.
1-3 DESCRIPTION The Series 690XXB Synthesized CW Generator and the Series
691XXB Synthesized Signal Generator are microprocessor-based, syn-
thesized signal sources with high resolution phase-lock capability.
They generate both discrete CW frequencies and broad (full range)
and narrow band sweeps across the frequency range of 10 MHz to
65 GHz. All functions of the 690XXB/691XXB are fully controllable lo-
cally from the front panel or remotely (except for power on/standby)
via the IEEE-488 General Purpose Interface Bus (GPIB).
The Series 690XXB Synthesized CW Generator and the Series
691XXB Synthesized Signal Generator each presently consists of
seven models covering a variety of frequency ranges and power levels.
Table 1-1, on page 1-4, lists models, frequency ranges, and maximum
leveled output.
690XXB/691XXB MM 1-3

1-4 690XXB/691XXB MM
GENERAL 690XXB/691XXB
INFORMATION MODELS
69XXXB
Model Frequency (GHz) Output Power Output Power
w/Step Attenuator
Output Power
w/Electronic
Step Attenuator
69X17B 0.01 – 8.4 GHz +13.0 dBm +11.0 dBm +9.0 dBm
69X37B 2.0 – 20.0 GHz +13.0 dBm +11.0 dBm +3.0 dBm
69X47B 0.01 – 20.0 GHz +13.0 dBm +11.0 dBm +3.0 dBm
69X67B 0.01 – 2.0 GHz 2.0 – 20.0 GHz
20.0 – 40.0 GHz
+13.0 dBm
+9.0 dBm
+6.0 dBm
+11.0 dBm
+7.0 dBm
+3.0 dBm Not Available
69X77B
0.01 – 2.0 GHz
2.0 – 20.0 GHz
20.0 – 40.0 GHz
40.0 – 50.0 GHz
+12.0 dBm
+10.0 dBm
+2.5 dBm
+2.5 dBm
+10.0 dBm
+8.5 dBm
0.0 dBm
–1.0 dBm
Not Available
69X87B
0.01 – 2.0 GHz
2.0 – 20.0 GHz
20.0 – 40.0 GHz
40.0 – 50.0 GHz
50.0 – 60.0 GHz
+12.0 dBm
+10.0 dBm
+2.5 dBm
+2.0 dBm
+2.0 dBm
+10.0 dBm
+8.5 dBm
0.0 dBm
–1.5 dBm
–2.0 dBm
Not Available
69X97B
0.01 – 2.0 GHz
2.0 – 20.0 GHz
20.0 – 40.0 GHz
40.0 – 50.0 GHz
50.0 – 65.0 GHz
+12.0 dBm
+10.0 dBm
+2.5 dBm
0.0 dBm
–2.0 dBm
Not Available Not Available
With Option 15A (High Power) Installed
69X17B 0.01 – 2.0 Ghz
2.0 – 8.4 GHz +13.0 dBm +17.0 dBm +11.0 dBm +15.0 dBm +11.0 dBm +11.0 dBm
69X37B 2.0 – 20.0 GHz +17.0 dBm +15.0 dBm +7.0 dBm
69X47B 0.01 – 2.0 GHz
2.0 – 20.0 GHz +13.0 dBm +17.0 dBm +11.0 dBm +15.0 dBm +11.0 dBm +7.0 dBm
69X67B 0.01 – 2.0 GHz 2.0 – 20.0 GHz
20.0 – 40.0 GHz
+13.0 dBm
+13.0 dBm
+6.0 dBm
+11.0 dBm
+11.0 dBm
+3.0 dBm Not Available
69X77B 0.01 – 50.0 GHz Standard Standard Not Available
69X87B 0.01 – 60.0 GHz Standard Standard Not Available
69X97B 0.01 – 65.0 GHz Standard Not Available Not Available
Table 1-1. Series 690XXB/691XXB Models
Note: In models with Option 22 that have a high-end frequency of £ 20 GHz, rated output power is reduced by 1 dB.
In models with Option 22 that have a high-end frequency of >20 GHz, rated output power is reduced by 2 dB.

1-4 IDENTIFICATION NUMBER All Anritsu instruments are assigned a unique six-digit ID number,
such as “875012”. The ID number is imprinted on a decal that is af-
fixed to the rear panel of the unit. Special-order instrument configura-
tions also have an additional special serial number tag attached to the
rear panel of the unit.
When ordering parts or corresponding with Anritsu Customer Service,
please use the correct serial number with reference to the specific in-
strument's model number (i.e., Model 69147B Synthesized Signal Gen-
erator, Serial No. 875012).
1-5 ELECTRONIC MANUAL This manual is available on CD ROM as an Adobe Acrobat Portable
Document Format (*.pdf) file. The file can be viewed using Acrobat
Reader, a free program that is also included on the CD ROM. The file
is "linked” such that the viewer can choose a topic to view from the
displayed "bookmark” list and "jump” to the manual page on which the
topic resides. The text can also be word-searched. Contact Anritsu
Customer Service for price and availablility.
1-6 RELATED MANUALS This is one of a four manual set that consists of an Operation Manual,
a GPIB Programming Manual, a SCPI Programming Manual, and a
Maintenance Manual.
Operation
Manual This manual provides instructions for operation of
the 690XXB/691XXB using the front panel controls.
It also includes general information, performance
specifications, installation instructions, and opera-
tion verification procedures. The Anritsu part
number for the Series 690XXB Operation Manual is
10370-10341; the part number for the Series
691XXB Operation Manual is 10370-10344.
GPIB
Programming
Manual
This manual provides information for remote opera-
tion of the 690XXB/691XXB using Product Specific
commands sent from an external controller via the
IEEE 488 General Purpose Interface Bus (GPIB). It
contains a complete listing and description of all
690XXB/691XXB GPIB Product Specific commands
and several programming examples. The Anritsu
part number for the Series 690XXB GPIB Program-
ming Manual is 10370-10342; the part number for
the Series 691XXB GPIB Programming Manual is
10370-10345.
SCPI
Programming
Manual
This manual provides information for remote opera-
tion of the 690XXB/691XXB using Standard Com-
mands for Programmable Instruments (SCPI)
commands sent from an external controller via the
690XXB/691XXB MM 1-5
GENERAL IDENTIFICATION
INFORMATION NUMBER

IEEE 488 General Purpose Interface Bus (GPIB). It
contains a complete listing and description of each
command in the 690XXB/691XXB SCPI command
set and examples of command usage. The Anritsu
part number for the Series 690XXB SCPI Program-
ming Manual is 10370-10343; the part number for
the Series 691XXB SCPI Programming Manual is
10370-10346.
1-7 OPTIONS The following instrument options are available.
q
Option 1, Rack Mounting. Rack mount kit containing a set of
track slides (90°tilt capability), mounting ears, and front panel
handles for mounting the instrument in a standard 19-inch
equipment rack.
q
Option 2A, 110 dB Step Attenuator. Adds a 10 dB per step
attenuator with a 110 dB range for models having a high-end fre-
quency of £20 GHz. Output power is selected directly in dBm on
the front panel (or via GPIB). Rated output power is reduced.
q
Option 2B, 110 dB Step Attenuator. Adds a 10 dB per step
attenuator with a 110 dB range for models having a high-end fre-
quency of £40 GHz. Output power is selected directly in dBm on
the front panel (or via GPIB). Rated output power is reduced.
q
Option 2C, 90 dB Step Attenuator. Adds a 10 dB per step
attenuator with a 90 dB range for models having a high-end fre-
quency of £50 GHz. Output power is selected directly in dBm on
the front panel (or via GPIB). Rated output power is reduced.
q
Option 2D, 90 dB Step Attenuator. Adds a 10 dB per step
attenuator with a 90 dB range for models having a high-end fre-
quency of £60 GHz. Output power is selected directly in dBm on
the front panel (or via GPIB). Rated output power is reduced.
q
Option 2E, 120 dB Electronic Step Attenuator. Addsa10dB
per step electonic attenuator with a 120 dB range for models hav-
ing a high end frequency of £8.4 Ghz. Output power is selected
directly in dBm on the front panel (or via GPIB). Rated output
power is reduced.
q
Option 2F, 120 dB Electronic Step Attenuator. Addsa10dB
per step electonic attenuator with a 120 dB range for models hav-
ing a high end frequency of £20 Ghz. Output power is selected di-
rectly in dBm on the front panel (or via GPIB). Rated output
power is reduced.
q
Option 9, Rear Panel RF Output. Moves the RF output con-
nector to the rear panel.
q
Option 11, 0.1 Hz Frequency Resolution. Provides frequency
resolution of 0.1 Hz.
1-6 690XXB/691XXB MM
GENERAL
INFORMATION OPTIONS

q
Option 14, Rack Mounting without Chassis Slides. Modifies
rack mounting hardware to install unit in console that has
mounting shelves. Includes mounting ears and front panel han-
dles.
q
Option 15A, High Power Output. Adds high-power RF compo-
nents to the instrument in the 2–20 GHz frequency range. Op-
tion 15A is standard in models having a high-end frequency that
is >40 GHz.
q
Option 16, High-Stability Time Base. Adds an ovenized,
10 MHz crystal oscillator with <5 x 10–10/day frequency stability.
q
Options 17A & 17B, No Front Panel. Deletes the front panel
for use in remote control applications where a front panel display
or keyboard control are not needed. Option 17A deletes the front
panel from 691XXB models; Option 17B deletes the front panel
from 690XXB models.
q
Option 18, mmWave Module Bias Output. Provides bias out-
put for 54000-xWRxx Millimeter Wave Source Modules. BNC
Twinax connector, rear panel.
q
Option 19, SCPI Programmability. Adds GPIB command
mnemonics complying with Standard Commands for Program-
mable Instruments (SCPI), Version 1993. SCPI programming
complies with IEEE 488.2-1987.
q
Option 21A, Digital Down Converter. Replaces the standard
Analog Down Converter (0.01 to 2.0 GHz) with a Digital Down
Converter (0.01 to 2.2 GHz).
q
Option 22, 0.1 Hz to 10 MHz Audio Frequency. Adds fre-
quency coverage below 10 Mhz. In models having a high-end fre-
quency of £20 GHz, rated output power is reduced by 1 dB; in
models having a high-end frequency of >20 GHz, rated output
power is reduced by 2 dB.
690XXB/691XXB MM 1-7
GENERAL
INFORMATION OPTIONS

1-8 LEVEL OF MAINTENANCE Maintenance of the 690XXB/691XXB consists of:
q
Troubleshooting the instrument to a replaceable subassembly or
RF component.
q
Repair by replacing the failed subassembly or RF component.
q
Calibration.
q
Preventive maintenance.
Troubleshoot-
ing The 690XXB/691XXB firmware includes internal
diagnostics that self-test most of the internal assem-
blies of the instrument. When the 690XXB/691XXB
fails self-test, one or more error messages are dis-
played to aid in troubleshooting the failure to a
replaceable subassembly or RF component. Chapter
5–Troubleshooting lists and describes the self-test
error messages and provides procedures for isolat-
ing 690XXB/691XXB failures to a replaceable subas-
sembly or RF component.
Repair Most instrument failures are field repairable by
replacing the failed subassembly or RF component.
Detailed instructions for removing and replacing
failed subassemblies and components are provided
in Chapter 6–Removal and Replacement Proce-
dures.
Calibration The 690XXB/691XXB may require calibration after
repair. Refer to Chapter 4–Calibration for a listing
of calibration requirements and calibration proce-
dures.
Preventive
Maintenance Preventive maintenance on the 690XXB/691XXB
consists of cleaning the fan honeycomb filter, de-
scribed in paragraph 1-10.
1-9 STATIC-SENSITIVE
COMPONENT HANDLING
PRECAUTIONS
The 690XXB/691XXB contains components that can be damaged by
static electricity. Figure 1-2 illustrates the precautions that should be
followed when handling static-sensitive subassemblies and compo-
nents. If followed, these precautions will minimize the possibilities of
static-shock damage to these items.
NOTE
Use of a grounded wrist strap when removing and/or replac-
ing subassemblies or components is strongly recommended.
1-8 690XXB/691XXB MM
GENERAL LEVEL OF
INFORMATION MAINTENANCE

690XXB/691XXB MM 1-9
GENERAL STATIC-SENSITIVE COMPONENT
INFORMATION HANDLING PRECAUTIONS
1. Do not touch exposed contacts
on any static sensitive compo-
nent.
2 Do not slide static sensitive
component across any surface. 3. Do not handle static sensitive components in areas where the
floor or work surface covering
is capable of generating a
static charge.
4. Wear a static-discharge wrist-
band when working with static
sensitive components.
5. Label all static sensitive
devices. 6. Keep component leads shorted together whenever possible.
7. Handle PCBs only by their
edges. Do not handle by the
edge connectors.
8. Lift & handle solid state de-
vices by their bodies – never
by their leads.
9. Transport and store PCBs and
other static sensitive devices
in static-shielded containers.
10. ADDITIONAL PRECAUTIONS:
·Keep workspaces clean and free of any objects capable of holding or storing a static charge.
·Connect soldering tools to an earth ground.
·Use only special anti-static suction or wick-type desoldering tools.
Figure 1-2. Static-Sensitive Compontent Handling Precautions