MW9070B Optical Time Domain Reflectometer
Service Manual
♦ Read this manual before using the equipment. Keep this manual with the equipment.
MW9070B Optical Time Domain Reflectometer Service Manual
Second Edition
Read this manual before using the equipment. Keep this manual with the equipment.
Measuring Instruments Division Measurement Group
ANRITSU CORPORATION
Document No.: M-W1046BE-2.0
Safety Symbols To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Corporation uses the following safety symbols to indicate safety-related information. Insure that you clearly understand the meanings of the symbols BEFORE using the equipment.
Symbols used in manual
DANGER
This indicates a very dangerous procedure that could result in serious injury or death if not performed properly.
WARNING
This indicates a hazardous procedure that could result in serious injury or death if not performed properly.
CAUTION
This indicates a hazardous procedure or danger that could result in light-tosevere injury, or loss related to equipment malfunction, if proper precautions are not taken.
Safety Symbols Used on Equipment and in Manual (Some or all of the following five symbols may not be used on all Anritsu equipment. In addition, there may be other labels attached to products which are not shown in the diagrams in this manual.) The following safety symbols are used inside or on the equipment near operation locations to provide information about safety items and operation precautions. Insure that you clearly understand the meanings of the symbols and take the necessary precautions BEFORE using the equipment. This indicates a prohibited operation. The prohibited operation is indicated symbolically in or near the barred circle. This indicates an obligatory safety precaution. The obligatory operation is indicated symbolically in or near the circle. This indicates warning or caution. The contents are indicated symbolically in or near the triangle. This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled. MW9070B Optical Time Domain Reflectometer Service Manual 7 September 1995 (First Edition) 25 February 1997 (Second Edition) Copyright © 1995–1997, ANRITSU CORPORATION. All rights reserved. No part of this manual may be reproduced without the prior written permission of the publisher. The contents of this manual may be changed without prior notice. Printed in Japan ii
Safety Outline
For safety, do not open the equipment covers. If repair is required, contact the sales representative, branch office, or agent at the telephone number and address given in this document or in the equipment operation manual.
Before Use
Although not recommended by Anritsu Corporation, if it is really imperative to open the covers for emergency repair, take great care not to touch any dangerous parts. Always request repair by a trained engineer who understands the hazards.
Index
Appendixes Maintenance Performance Test
Operation
Setting Up
Anritsu Corporation will not accept liability for any injuries sustained as a result of opening the equipment covers.
iii
For Safety WARNING 1. ALWAYS refer to the operation manual when working near locations at which the alert mark shown on the left is attached. If the operation, etc., is performed without heeding the advice in the operation manual, there is a risk of personal injury. In addition, the equipment performance may be reduced. Moreover, this alert mark is sometimes used with other marks and descriptions indicating other dangers. 2. Laser radiation warning • NEVER look directly into the cable connector on the equipment nor into the end of a cable connected to the equipment. If laser radiation enters the eye, there is a risk of •
injury. Laser Radiation Markings on a following page shows the Laser Safety label attached to the equipment near the cable connector.
3. This equipment cannot be repaired by the user. DO NOT atRepair
tempt to open the cabinet or to disassemble internal parts. Only Anritsu-trained service personnel or staff from your sales representative with a knowledge of electrical fire and shock hazards should service this equipment. There are high-volt-
WARNING
age parts in this equipment presenting a risk of severe injury or fatal electric shock to untrained personnel. In addition, there is a risk of damage to precision parts.
iv
For Safety This equipment should be used in the correct position. If the cabinet is turned on its side, etc., it will be unstable and may be damaged if it falls over as a result of receiving a slight mechanical shock.
5.
When replacing the battery, use the specified battery and insert it with the correct polarity. If the wrong battery is used, or if the battery is inserted with reversed polarity, there is a risk of explosion causing severe injury or death.
6.
DO NOT short the battery terminals and never attempt to disassemble it or dispose of it in a fire. If the battery is damaged by any of these actions, the battery fluid may leak. This fluid is poisonous. DO NOT touch it, ingest it, or get in your eyes. If it is accidentally ingested, spit it out immediately, rinse your mouth with water and seek medical help. If it enters your eyes accidentally, do not rub your eyes, irrigate them with clean running water and seek medical help. If the liquid gets on your skin or clothes, wash it off carefully and thoroughly.
7.
This instrument uses a Liquid Crystal Display (LCD); DO NOT subject the instrument to excessive force or drop it. If the LCD is subjected to strong mechanical shock, it may break and liquid may leak. This liquid is very caustic and poisonous. DO NOT touch it, ingest it, or get in your eyes. If it is ingested accidentally, spit it out immediately, rinse your mouth with water and seek medical help. If it enters your eyes accidentally, do not rub your eyes, irrigate them with clean running water and seek medical help. If the liquid gets on your skin or clothes, wash it off carefully and thoroughly.
Falling Over
Before Use
4.
Outline
WARNING
Operation Appendixes Maintenance Performance Test
LCD
Index
Battery Fluid
Setting Up
Replacing Battery
v
For Safety CAUTION 1. Do not use any AC adapter other than the supplied accessory adapter. If another adapter is used, it may not meet the required specifications and the OTDR may be damaged. Grounding When the AC adapter is used, connect the ground line to earth. The OTDR may be damaged if the AC adapter is not grounded or there may be a danger of an electric shock.
2. Insert the batteries with the correct polarity when the DryCell Batteries are used, or the electrolyte may leak or the battery may explode. Never mix new and old batteries, or different types of batteries. Be sure not to short the battery pack contacts when it is detached. Do not dispose of batteries by incineration.
vi
Visible LD light source
IEC825
Class 1
Class 2
21 CFR 1040.10
Class 1
Class 2
Class 1 and Class 2 indicates the degree of danger of the laser radiation outlined below as defined by JIS, IEC825 and 21CFR1040.10. Class 1
Safe laser presenting no danger when used according to design specifications.
Class 2
Laser radiating in 400 to 700 nm wavelength range. In principal, this class of laser is not safe, but the danger to the eyes is eliminated by the eye avoidance reaction including the blink response.
Label Attachment Positions Aperture Label
Class-2 Safety Label (Only for optical unit option 05)
(21CFR 1040.10, only for US customers) (IEC 825) Class-1 Safety Label
Laser Symbol (Attached when vi(Only for optical unit option 05)
sual LD light source installed)
This international laser symbol indicates that the equipment uses class 2 laser light.
Index
Class-2 Safety Label
Before Use
OTDR light source
Setting Up
The danger classification specified by JIS, IEC825 and 21CFR1040.10 are explained below.
Operation
The warning labels shown below are attached near the laser-radiation locations.
Appendixes Maintenance Performance Test
This equipment uses parts radiating Class 1 or Class 2 laser radiation.
Outline
For Safety Laser Radiation Markings
(21CFR 1040.10, only for US customers)
vii
For Safety WARNING
FOR US CUSTOMERS Please Recycle. The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of it’s useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for recycling options or proper disposal. Before disposing of this product, discharge the battery, and then mail
Ni-Cd
the battery to your local recycling center. 1. Disconnect the ac adapter, if used. 2. Turn the power switch to on. 3. Leave the product on until the power indicator goes off; the battery is now discharged. 4. Remove the Ni-Cd Battery Pack. 5. Insulate the battery terminals with adhesive tape. 6. Mail it to your local recycling center, or to the following address. ANRITSU WILTRON COMPANY 685 Jarvis Drive, Morgan Hill, CA 95037, USA
viii
For Safety
FOR EU•EFTA CUSTOMERS Please
Read the following when using products to which the mark shown on the above is attached. The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of its useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste. Check with your local solid-waste disposal officials for details of recycling options or proper disposal in your area. Before disposing of this product, discharge the battery, and then mail the battery to your local recycling centre. 1. Disconnect the ac adapter, if used. 2. Turn the power switch to on. 3. Leave the product on until the power indicator goes off; the battery is now discharged. 4. Remove the Ni-Cd Battery Pack. 5. Insulate the battery terminals with adhesive tape. 6. Please recycle in accordance with your national or regional legislation.
Nach Gebrauch der Ver Kaufsstelle Zurückgeben.
Appendixes Maintenance Performance Test
Ni-Cd
Operation
Setting Up
Before Use
Recycle.
Outline
WARNING
Index
Après usage à rapporter au point de vente.
ix
For Safety CAUTION
back-up battery
This equipment uses a lithium battery to back-up the memory. This battery must be replaced by a service engineer when it has reached the end of its useful life; contact the Anritsu sales section or your nearest representative.
Storage media
This equipment uses plug-in memory cards (PMCs) as external media for storing data and programs.
Changing memory
If this media is mishandled, important data may be lost. To prevent this chance occurrence, all important data and programs should be backed-up. Anritsu will not be held responsible for lost data. Pay careful attention to the following points. In particular, never remove the PMC from the pulse tester, while it is being accessed. (PMC) • PMCs are easily damaged by static electric charges. • The back-up battery in SRAM plug-in memory cards has a finite life. Replace the battery periodically.
x
The fault is outside the scope of the warranty conditions described in the operation manual.
•
The fault is due to misoperation, misuse, or unauthorized modification or repair of the equipment by the customer.
•
The fault is due to severe usage clearly exceeding normal usage.
•
The fault is due to improper or insufficient maintenance by the customer.
•
The fault is due to natural disaster including fire, flooding and earthquake, etc.
•
The fault is due to use of non-specified peripheral equipment, peripheral parts, consumables, etc.
•
The fault is due to use of a non-specified power supply or in a non-specified installation location.
In addition, this warranty is valid only for the original equipment purchaser. It is not transferable if the equipment is resold. Anritsu Corporation will not accept liability for equipment faults due to unforeseen and unusual circumstances, nor for faults due to mishandling by the customer.
Anritsu Corporation Contact If this equipment develops a fault, contact Anritsu Corporation or its representatives at the address in this manual.
xi
Before Use Setting Up
•
Operation
Anritsu Corporation will repair this equipment free-of-charge if a malfunction occurs within 1 year after shipment due to a manufacturing fault, provided that this warranty is rendered void under any or all of the following conditions.
Appendixes Maintenance Performance Test
Anritsu Warranty
Index
Anritsu Corporation certifies that this equipment was tested before shipment using calibrated measuring instruments with direct traceability to public testing organizations recognized by national research laboratories including the Electrotechnical Laboratory, the National Research Laboratory and the Communication Research laboratory, and was found to meet the published specifications.
Outline
Equipment Certificate
CE Marking Anritsu affix the CE Conformity Marking on the following product(s ) accordance with the Council Directive 93/68/EEC to indicate that they conform with the EMC directive of the European Union (EU).
CE Conformity Marking
1. Product Name/Model Name Product Name:
MW9070 Series Optical Time Domain Reflectometer and Plug in Units
Model Name:
MW9070A/B, MW097 ~
,~ M Z 5 0 1 8 A ,
MZ5020A, SWA1702W
2. Applied Directive EMC : Council Directive 89/336/EEC Safety: Council Directive 73/23/EEC
3. Applied Standards EMC: Electromagnetic radiation: EN55011(ISM, Group 1, Class A equipment) Immunity: EN50082-1 Performance Criteria*
IEC801-2 (ESD) 4 kVCD, 8 kVAD
B
IEC801-3 (Rad.)
3 V/m
A
IEC801-4 (EFT)
1 kV
B
*: Performance Criteria A: No performance degradation or function loss B: Self-recovered temporary degradation of performance or temporary loss of function
Safety: EN61010-1
xii
(Installation Category II, Pollution Degree 2)
TABLE OF CONTENTS
For Safety ....................................................................
iv
SECTION 1 GENERAL .........................................
1
1.1 1.2
Introduction .......................................................... Safety Precautions ................................................
SECTION 2 2.1 2.2
1 1
PREPARATION ...............................
3
Introduction .......................................................... Precautions ...........................................................
3 3
SECTION 3
TROUBLESHOOTING ..................
5
3.1 Introduction .......................................................... 3.2 Recommended Test Equipment .......................... 3.3 Block Diagram ...................................................... 3.4 Troubleshooting ................................................... 3.4.1 Flowchart symbols ....................................... 3.4.2 Troubleshooting ...........................................
5 5 6 8 8 9
I
II .
SECTION 1 GENERAL 1.1 Introduction This manual describes the items required to troubleshoot and repair the MW9070B Optical Time Domain Reflectometer. Section 2 describes how to attach and remove the optical unit and the battery pack. Section 3 describes how to troubleshoot when trouble occurs during measurements or when abnormalities are detected during performance checks. Refer to the separate Operation Manual for details on operating procedures.
1.2 Safety Precautions WARNING Never look directly into the laser radiation emitted from the OUTPUT connector or the far-end of the connected fiber to be measured.
The MW9070B uses two types of laser diode as the light source. The output energy for the OTDR output conforms to 21 CFR 1040.10 (FDA) Class 1 specifications and IEC 825 Class 1 specifications. The output energy for the optional visible LD output conforms to 21 CFR 1040.10 (FDA) Class 2 specifications and IEC 825 Class 2 specifications. The LASER OUTPUT connector protective cover of the MW9070B is provided to protect the operator. Make sure of the line voltage to be applied when using AC adaptor. The optical unit must be attached and removed ONLY while POWER is OFF.
1
SECTION 1
2
GENERAL
SECTION 2
PREPARATION
2.1 Introduction This section describes the procedures for removing the optical unit and the battery pack from the MW9070B. Figures 2-1 through 2-3 show disassembled view of the MW9070B.
2.2 Precautions Always follow the procedure steps below before attach and remove.
CAUTION Follow the steps below before removing/mounting the optical unit and the battery pack. Turn off the POWER switch. Remove the AC adapter from the MW9070B.
(1) Removing the optical unit (see Fig. 2-1) Losen the two screws with a blade screwdriver and remove the optical unit.
3
SECTION 2
PREPARATION Fig. 2-1 (2) Removing the battery pack (see Fig. 2-2) Losen the two screws with a blade screwdriver or coin and remove the battery pack.
or (Coin)
Fig. 2-2 (3) Removing the optical connector (see Fig. 2-3)
Fig. 2-3 4
SECTION 3
TROUBLESHOOTING
3.1 Introduction This section describes the troubleshooting methods.
3.2 Recommended Test Equipment Table 3-1 lists the recommended test equipment for troubleshooting.
No. 1
Instrument and device Digital multimeter
Required specifications
Remarks
Measuring voltage r 0 to }100 Vdc
Table 3-1 Recommended Test Equipment
5
SECTION 3
TROUBLESHOOTING
3.3 Block Diagram Figure 3-1 shows a block diagram of the MW9070B, figure 3-2 shows a block diagram of the MW0970A/MW0972A/MW0973J/MW0975J/ MW0970B/MW0972B, figure 3-3 shows a block diagram of the MZ5018A. The part shown with chain line is for optional installation.
Integrated Processor ROM LCD
Disp. LSI
RAM (Not backed-up)
VRAM Serial Port 3.5" FDD
RAM (Backed-up)
Battery
RS232C Driver Real Time Clock
FDC CPU Peripheral LSI
Printer Port
Printer Driver
To/From Optical Unit
Memory Card I/F DC/DC Converter
From AC Adapter
Key SW LED Keyboard Port
Fig. 3-1 MW9070B Block Diagram
6
From Battery Pack
3.3 Block Diagram
To MW9070B ROM
Measure LSI
Fig. 3-2
A/D Converter
AMP
LD Driver
LD
LD Driver
LD
APD
Output
VLD out
MW0970A/MW0972A/MW0973J/MW0975J/MW0970B/MW0972B Block Diagram
Ni-Cd Battery
Battery Charger
To MW9070B
From AC Adapter
Fig. 3-3
MZ5018A Ni-Cd Battery Pack Block Diagram
7
SECTION 3
TROUBLESHOOTING
3.4 Troubleshooting Do not remove the optical unit and battery pack cover of the MW9070B. When occurring the trouble it is necessary to remove the cover, please contact your nearest Anritsu dealer or business office for repair.
3.4.1 Flowchart symbols The flowcharts in the Section 3 use the symbols shown below to explain the troubleshooting procedure.
Work
No Check
Yes
Repair Repair point and its contents
Note: Explanations described below the figures inside the bols are setting conditions for the MW9070B.
8
sym-
3.4
Troubleshooting
3.4.2 Troubleshooting (1) POWER lamp not lit.
START
Connect AC adapter, and turn on POWER switch. POWER lamp lit?
No
Repair MW9070B faulty
Yes Charge the MZ5018A Ni-Cd Battery Pack (about 14 hours). Replace the batteries with new ones if the MZ5020A Dry-Cell Battery Pack is use.
Remove the battery pack. Potential difference between (1) and (2) shown in the Fig. 3-4 more than 12 V? No
Repair MZ5018A or MZ5020A faulty
Fig.3-4 Yes Connect the battery pack, and turn on POWER switch. POWER lamp lit?
No
Repair MW9070B faulty
Yes END
9
SECTION 3
TROUBLESHOOTING (2) No display on the LCD display
START
Adjust contrast knob. Display appears?
No
Repair MW9070B faulty
Yes END
(3) Self check screen, not released MW9070B faulty. (4) Setup screen, not released
START
The optical unit connected?
Yes
No
Connect the optical unit.
(5) No waveform displayed Optical unit faulty.
10
Repair MW9070B or optical unit faulty.
3.4
Troubleshooting
(6) Data cannot be input from a stand-alone keyboard. START
Is the keyboard connector firmly
Repair
No
Firmly connect the keyboard.
connected to the mainframe? Yes Connect another keyboard to the mainframe.
Repair
Yes
Is data input normally?
Keyboard faulty
No
Repair MW9070B faulty
(7) The MW9070B performance out-of-specification
START
Clean the optical connector and optical fiber end face. Thereafter, execute the measurement. Performance out-of-specification?
Yes
Repair Optical unit faulty.
No END
11
SECTION 3
TROUBLESHOOTING (8) No printer output START
Printer cable disconnected?
Yes
Retry Connect printer cable tightly, and print out.
No Replace printer cable, and print out. Printer output normal?
Yes
Retry Printer cable faulty.
No
Call setup screen page 2.
Printer type set correctly?
No
Retry Set correct printer type, and print out.
Yes
Printer Dip-sw set correctly? Yes Repair MW9070B faulty.
12
No
Retry Set Dip-sw correctly, and print out. (For DPU411 printer and printer Dip-sw setting, refer to the MW9070B operation manual.)
3.4
Troubleshooting
(9) Memory card cannot be read/written START
Is your memory card an SRAM card
No
meeting to JEIDA V4 / PCMCIA R1.0?
The card cannot be used.
Yes
Set Target in the Setup Screen 2/2 to Memory card.
Prepare a card meeting to specifications. Set the write protect switch to Write Enable, if the card has it.
Format the memory card. Did it complete?
No
Repair MW9070B faulty
Yes Press the START key to collect the data.
No
Repair MW9070B faulty
And then save the data. Did it complete? Yes Leave the write protect switch to , Write Enable, and recall the saved data. Did it complete?
No
Repair MW9070B faulty
Yes The memory card in which the data cannot be written is faulty.
13
SECTION 3
TROUBLESHOOTING (10) Floppy disk cannot be read/written START
Set Target in the Setup Screen 2/2 to FD.
Prepare a good quality 3.5" floppy disk for scratch. WRITE ENABLE
Set write protect switch to write enable.
Format the floppy disk. Did it complete?
DISABLE
No
Repair MW9070B faulty
Yes Press the START key to collect the data.
No
Repair MW9070B faulty
And then save the data. Did it complete? Yes Leave the write protect switch to Write Enable, and recall the saved data. Did it complete?
No
Repair MW9070B faulty
Yes If you have a floppy disk in which data are written by annother MW9070B, use it. Yes
Were the data read correctly?
No
Repair MW9070B faulty
Yes Use the floppy disk in trouble again and read the data. Were the data read correctly? Yes END
14
No
The floppy disk faulty
3.4 (11)
Troubleshooting
Visible LD is not output.
START
Is the VLD ON displayed at the Setup screen?
Repair
No MW9070B
Yes
Clean the optical connector and fiber end face.
Is the output power in the range of -3.0 }1.5 dBm (Wavelength=635 nm) Yes
No
Repair Option 05 for MW0970A/0972A/0973J/ MW0975J/MW0970B/MW0972B optical units
END
15
SECTION 3
16.
TROUBLESHOOTING
ANRITSU CORPORATION 5-10-27, Minamiazabu, Minato-ku, Tokyo 106 Japan / Phone: 81-3-3446-1111
Document No.: M–W1046BE–2.0
Printed in Japan
