Anritsu MW9076 Series Service Manual
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Anritsu MW9076 Series Service Manual

Anritsu MW9076 Series Service Manual

Optical time domain reflectometer
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MW9076 Series
Optical Time Domain Reflectometer
Service Manual
Read this manual before using the equipment. Keep this manual with the equipment.

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Summary of Contents for Anritsu MW9076 Series

  • Page 1 MW9076 Series Optical Time Domain Reflectometer Service Manual Read this manual before using the equipment. Keep this manual with the equipment.
  • Page 4 ANRITSU CORPORATION 5-10-27, Minamiazabu, Minato-ku, Tokyo 106-8570 Japan / Phone: 81-3-3446-1111 Document No.: M–W1659BE Printed in Japan...
  • Page 5 MW9076 Series Optical Time Domain Reflectometer Service Manual Fifth Edition Read this manual before using the equipment. Keep this manual with the equipment. Measurement Solutions ANRITSU CORPORATION Document No.: M-W1659BE-5.0...
  • Page 6 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.

  • Page 7: For Safety

    Although not recommended by Anritsu Corporation, if it is really im- perative to open the covers for emergency repair, take great care not to touch any dangerous parts.
  • Page 8 4. This equipment cannot be repaired by the user. DO NOT attempt to open the cabinet or to disassemble internal parts. Only Anritsu- Repair trained service personnel or staff from your sales representative...
  • Page 9 For Safety WARNING 5. This equipment should be used in the correct position. If the cabi- net is turned on its side, etc., it will be unstable and may be dam- Falling Over aged if it falls over as a result of receiving a slight mechanical shock.
  • Page 10 For Safety Laser Radiation Markings This equipment uses parts radiating Class 1 or Class 2 laser radia- tion. The warning labels shown below are attached near the laser- radiation locations. The danger classification specified by JIS, IEC Pub 60825-1 and 21CFR1040.10 are explained below.
  • Page 11 Anritsu sales section or your near- est representative. This equipment uses ATA memory cards as external media for stor- Storage media ing data and programs.
  • Page 12 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 unfore- seen and unusual circumstances, nor for faults due to mishandling by the cus- tomer.
  • Page 13 Please contact ANRITSU or the sales representatives of Anritsu if there are any doubts or questions about the dis- posal of waste. Trademark MS-DOS is a registered trademark of Microsoft Corporation...
  • Page 14 CE Marking Anritsu affixes the CE Conformity Marking on the following product (s) in accor- dance 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...
  • Page 15 Anritsu affixes the C-tick marking on the following product (s) in accordance with the regulation to indicate that they conform with the EMC framework of Australia/New Zealand C-tick marking N274 1. Product Name/Model Name Product Name: Optical Time Domain Reflectomater...
  • Page 17 About This Manual This is the service manual of the MW9076 Series Optical Time Domain Reflecto- meter for smooth maintenance and service work of the service personnel, and does not supplied to customers. Only used for service personnel. Refer to the separate operation manual (an accessory supplied to the equipment) for handling the instruments.

  • Page 18: Table Of Contents

    Table of Contents For Safety ............About This Manual ........Section 1 General......... 1.1 Introduction ..............1.2 Safety Precautions ............. Section 2 Preparation ........2.1 Introduction ..............2.2 Precautions ..............2.3 Installing and Removing the Unit and the Battery Pack ............Section 3 Troubleshooting......

  • Page 19: Section 1 General

    Section 1 General Introduction ............ Safety Precautions ........

  • Page 20: Introduction

    OUTPUT connector or the far-end of the connected fiber to be measured. The MW9076 Series OTDR uses up to 4 types of laser diodes as the light source, respectively. The output energy for the OTDR output conforms to 21 CFR 1040.10 (FDA) Class 1 specifications and IEC 825-1 Class 1 specifications.
  • Page 21 Section 2 Preparation Introduction ............ Precautions ............ Installing and Removing the Unit and the Battery Pack ..........2.3.1 Installing and Removing the OTDR Main Unit ..........2.3.2 Installing the Battery Pack ....2.3.3 Replacing the Optical Connector ..2.3.4 Removing the Optical Channel Selector ..........

  • Page 22: Section 2 Preparation

    Section 2 Preparation Introduction This section describes the procedures for removing the unit and the battery pack from the MW9076 Series OTDR. Figs. 2-1 through 2-5 show the disassembled views of the OTDR and the display unit. Precautions Always follow the procedure steps below, before attach and remove.

  • Page 23: Installing And Removing The Unit And The Battery Pack

    2.3 Installing and Removing the Unit and the Battery Pack Installing and Removing the Unit and the Battery Pack 2.3.1 Installing and Removing the OTDR Main Unit This section explains how to install and remove the OTDR main unit (MW9076 Series OTDR).
  • Page 24 Section 2 Preparation 2.3.2 Installing the Battery Pack This section explains how to install/remove the battery pack to/from the OTDR. Read the following explanation when replacing the battery pack. Screw Attachment Battery pack Fig. 2-2 Installing the battery pack (See Fig. 2-2) (1) Insert the battery pack into the OTDR main unit.
  • Page 25 2.3 Installing and Removing the Unit and the Battery Pack 2.3.3 Replacing the Optical Connector To replace the optical connector, pull the lever towards you until the hook is released. Then, remove the connector by lifting it. (See Fig. 2-3) OTDR I/O connector Light source output connector Visible LD light source...
  • Page 26 Section 2 Preparation 2.3.4 Removing the Optical Channel Selector The removing procedures of a built-in optical channel selector (MU960001A/2A/ 3A) are explained below. (See Fig. 2-5) (1) Turn off the power to the OTDR. (2) Remove the OTDR main unit. For details, refer to “Section 2.3.1 Installing and Removing the OTDR Main Unit”...
  • Page 27 2.3 Installing and Removing the Unit and the Battery Back Screws for OTDR main unit OTDR main unit Connector Connectors Screws for optical channel selector Optical channel selector Display unit Fig. 2-5...
  • Page 28 Section 2 Preparation 2-8.
  • Page 29 Section 3 Troubleshooting Introduction ............ Recommended Test Equipment ....Block Diagram ..........Troubleshooting ..........3.4.1 Flowchart Symbols ......3.4.2 Flowchart ..........3-10 3.4.3 After Repaired ........3-13...

  • Page 30: Section 3 Troubleshooting

    Section 3 Troubleshooting Introduction This section describes the troubleshooting methods. Recommended Test Equipment Table 3-1 lists the recommended test equipment for troubleshooting. Table 3-1 Recommended Test Equipment Instrument and device Required specifications Remarks External VGA monitor VGA conversion cable Ordering No. J0978 For connection to external (see ordering information) monitor...

  • Page 31: Block Diagram

    3.3 Block Diagram Block Diagram Figs. 3-1 to 3-6 show the block diagrams of the MW9076B/C, MW9076B1, MW9076D1, MW9076J/K, MU250000A/A1/A4, and MU960001A/2A. The parts shown with broken line are optional. Exchange module of To/From MW9076B/C main frame From/To Display unit Display Unit Selector and FET Switch...
  • Page 32 Section 3 Troubleshooting To/From Exchange module of MW9076B1 main frame From/To Display unit Display Unit Selector and FET Switch Measure LSI Battery Charger driver converter Battery Amplifier Pack module Battery Optical module Controller Directional Coupler Exchange Exchange module of module of Optical Visible LD Power Meter...
  • Page 33 3.3 Block Diagram Exchange module of To/From MW9076D1 main frame From/To Display unit Display Unit Selector and FET Switch Flash Measure LSI Disk Battery LD driver Charger Battery Pack module module module module Battery Optical Optical Controller Directional Directional Coupler Coupler converter Optical...
  • Page 34 Section 3 Troubleshooting Exchange module of To/From From/To Display unit Display Unit MW9076J/K main frame Selector and FET Switch Measure LSI Battery Charger driver converter Amplifier Battery module Pack Optical module Directional Battery Coupler Controller Exchange Flash module of Disk Visible LD MW9076J/K-01 Optical Fiber Cable to be measured...

  • Page 35: Main Unit

    +12, 5, 3.3 V Exchange module of Key switch ISA bus +5, 3.3 V EEPROM Exchange module of To/From A2 ENCODER Main Unit Selector and Flash Disk FET Switch Battery Charger Battery Pack (MW9076 Series Main flame) Fig. 3-5 MU250000A/A1/A4...
  • Page 36 Section 3 Troubleshooting Exchange module of Optical Channel Selector MU960001A To/From Display unit To/From Main Unit Interface Circuit 1 × 4 Optical EEPROM Switch Exchange module of Optical Channel Selector MU960002A To/From Display unit To/From Main Unit Interface Circuit 1 × 5 Optical 1 ×...

  • Page 37: Troubleshooting

    3.4 Troubleshooting Troubleshooting Do not remove the optical unit and battery pack cover of the MW9076 Series OTDR. 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...

  • Page 38: Flowchart

    AC adapter Power lamp lit? Exchange Set up mode appear MU250000A/A1/A4 on display? A1 MAIN PKG, Key Switch or Card PC Exchange Check the display unit. (See Flowchart (2) and Main unit (3)). Is it OK? (MW9076 Series OTDR) 3-10...
  • Page 39 (3) Symptom: Doesn’t start up START Exchange BIOS or RAM checking MU250000A/A1/A4 comments appear? A1 MAIN or See Fig. 3-7. OS loading comment appears? See Fig. 3-8. Exchange OTDR setup window appears? Main unit See Fig. 3-9. (MW9076 Series OTDR) 3-11...
  • Page 40 Section 3 Troubleshooting ANRITSU CORPORATION 032384 KB OK Press skip memory test Fig. 3-7 ----------- Fig. 3-8 Fig. 3-9 3-12...

  • Page 41: After Repaired

    Can’t input comment from keyboard (5) Exchange module fault Symptom of fault Repairing part OTDR performance out-of-specification Main unit (MW9076 Series OTDR) Can't operate with Battery pack Battery pack Visible LD output not available Visible LD Optical Power Meter value shows unusual value...
  • Page 42 Section 3 Troubleshooting 3-14 .

  • Page 43: Section 4 Removing The Exchange Module In The Unit

    Section 4 Removing the Exchange Module in the Unit This section describes the procedures for removing the exchange module in the Main unit and the Display unit. Before removing the module, remove the OTDR Main unit. For details, refer to “Section 2.3.1 Installing and Removing the OTDR Main Unit”.

  • Page 44: List Of The Exchange Module/Registry

    Section 4 Removing the Exchange Module in the Unit List of the Exchange Module/Registry The exchange module lists are shown in the table below. Refer to the Appendix A “Specifications” of the separate operation manual for details, except for the mod- ules of the Display unit.
  • Page 45 4.1 List of the Exchange Module/Registry Model name of main frame MW9076K GIF 0.85/1.3 µm OTDR Product name of main frame Registry number MB-C1EX0009 Exchange Module GIF 0.85/1.3 µm OTDR Module MW9076K MW9076K-01 (MM900059A) Visible LD Model name MU250000A Product name Display Unit Registry number Exchange Module...

  • Page 46: Removing The Exchange Module In The Main Unit

    Section 4 Removing the Exchange Module in the Unit Removing the Exchange Module in the Main Unit The exchange modules in the main unit are Visible LD and Optical Power Meter (include High-power optical power meter). They are all option modules, so not both modules are set in all units.
  • Page 47 4.2 Removing the Exchange Module in the Main Unit Fig. 4-1 Screws to loosen LASER output LASER output (option) (option) A1 MEAS Fig. 4-2...
  • Page 48 Section 4 Removing the Exchange Module in the Unit Screws A3 OPM Screws Connector Optical power meter input connector Fig. 4-3 Screws to loosen Fig. 4-4 Optical Power Meter...
  • Page 49 4.2 Removing the Exchange Module in the Main Unit Optical connector Screws Connector on PC board Fig. 4-5 Fig. 4-6 Visible LD...

  • Page 50: Removing The Exchange Module In The Display Unit

    Section 4 Removing the Exchange Module in the Unit Removing the Exchange Module in the Display Unit The exchange modules in the Display unit are A1 MAIN, A2 ENCODER, Card PC, TFT (or STN) LCD, Key Switch and FDD. (1) Loosen the 7 screws ([1] to [7] in Fig. 4-7) on the chassis of the Display unit using a screwdriver.

  • Page 51: Removing Fdd

    4.3 Removing the Exchange Module in the Display Unit 4.3.1 Removing FDD (See Figs, 4-8 and 4-9) (1) Loosen the 3 screws ([1], [2] and [3] in Fig. 4-8) and disconnect the cable from the connector (A). CAUTION Be careful not to damage the connector. It’s very breakable.
  • Page 52 Section 4 Removing the Exchange Module in the Unit Screw Locks [2] Fig. 4-10 Screws to loosen Fig. 4-11 A1 MAIN 4-10...

  • Page 53: Removing Card Pc

    4.3 Removing the Exchange Module in the Display Unit 4.3.3 Removing Card PC (See Fig. 4-12.) (1) After removing the A1 MAIN, reverse it and slide the CARD PC to the direction shown in Fig. 4-12. CARD PC Fig. 4-12 A1 MAIN (Other Side of Fig. 4-11) 4-11...

  • Page 54: Removing The A2 Encoder

    Section 4 Removing the Exchange Module in the Unit 4.3.4 Removing the A2 ENCODER (See Figs. 4-13, 4-14, and 4-15.) (1) Pull out the rotary knob on the front side of the Display unit. (2) After removing A1 MAIN, loosen the screw in Fig. 4-13. (3) Pull up the chassis.
  • Page 55 4.3 Removing the Exchange Module in the Display Unit Connector Screws Fig. 4-15 A2 ENCODER Note: Pull out the rotary knob (front side of the display) first, please. 4-13...

  • Page 56: Removing Lcd

    Section 4 Removing the Exchange Module in the Unit 4.3.5 Removing LCD (See Figs. 4-14, 4-16, and 4-17.) (1) After removing the A1 MAIN, loosen the 4 screws ([1] to [4] in Fig. 4-14). (2) Pull out the LCD (& Cover), and disconnect 2 connectors ([A] and [B] in Fig.

  • Page 57: Removing Key Switch

    4.3 Removing the Exchange Module in the Display Unit 4.3.6 Removing Key Switch (See Fig. 4-18.) (1) After removing LCD, loosen 4 screws ([1] to [4] in Fig. 4-18). (2) Remove the key Switch. Screws Fig. 4-18 4-15...
  • Page 58 Section 4 Removing the Exchange Module in the Unit 4-16 .

  • Page 59: Section 5 Installing The Option

    Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit Option 01 can be installed in all the Main Units (MW9076 Series OTDR), but Option 02/03 can only be exclusionary installed in MW9076B/B1/C. Composition ........... Mounting Procedure ........

  • Page 60: Composition

    Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit Composition Table 5-1 Option 01 (Visible LD MM900059A) Item Name Q’ty A4 VLD Replacable optical connector Rear shell 2.5NPS4B3+SW Magic Tape (Male) Magic Tape (Female) Laser safety label Please check that a serial number is after 6200095283 when installing to MW9076J/K.
  • Page 61 5.2 Mounting Procedure Cover 1 Cover 2 Fig. 5-2 Mounting Option01 (Visible LD) (See Fig. 5-2 , 5-3, 5-4, 5-5 and 5-6) 1) If the main unit is MW9076 J or K, please equip with the visible LD after a serial number 6200095283 since there is a possibility that the other VLD may short-circuit with a main unit.
  • Page 62 Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit Fig. 5-3 Optical connector Screws Connector on PC board Fig. 5-4...
  • Page 63 5.2 Mounting Procedure Fiber Magic Tape Shield case Side view Fig. 5-5 FDA (Attached when visible LD light source (Attached when visible LD light installed and only for source installed) exportation to the United States of (Attached when visible LD light America) source installed) FDA (Attached when...
  • Page 64 Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit Mounting Option 02 or 03 (Optical Power Meter) (See Fig. 5-7 and 5-8) CAUTION Be careful not to damage the connector in Fig. 4-3 CAUTION Be careful not to damage the optical fiber under the optical power meter CAUTION Optical Power Meter is sensitive to static electricity...
  • Page 65 5.2 Mounting Procedure Option 02 Option 03 Fig. 5-7 Screws A3 OPM Screws Connector Visible LD output connector Optical power meter input connector Fig. 5-8...
  • Page 66 Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit LASER output LASER output (Option 02/03) (Option 01) A1 MEAS Magic Tape Fig. 5-9...

  • Page 67: Unit Rom Modification Procedure

    5.3 Unit ROM Modification Procedure Unit ROM Modification Procedure 5.3.1 Configuration Connect MW9076 Series OTDR (Serial Port No.1) and a PC which runs Win- dows95 with the RS-232C cable (J0654A). RS-232C cross cable MW9076+ (Ordering No. J0654A) MU250000A/A1+ Option 01/02/03 5.3.2...
  • Page 68 Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit PC Operation Start Windows 95 on the PC, select Start → Program → Accessories → Hyper Terminal to open the Hyper Terminal window. Click “Hypertrm. exe” to activate the Hyper Terminal. When the Connection Description window as shown below appears, enter an appropriate name in Name (MW9076B in the following example) and click Fig.

  • Page 69: 5.3 Unit Rom Modification Procedure

    5.3 Unit ROM Modification Procedure Then, a window for setting the RS-232C port as shown below appears. Here, set each item as follows and click OK. When this window does not open, open the Properties window from the Hyper Terminal window (File → Properties), click the Setting folder, and click the Configure button.
  • Page 70 Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit Open the Properties window from the Hyper Terminal window (File → Prop- erties) and click the Setting folder. Then, the window shown below opens. Here, set relevant items and click the ASCII Setup button. Fig.
  • Page 71 5.3 Unit ROM Modification Procedure Type LD1 on the Hyper Terminal window and hit the return key to display LD1 at the bottom of the OTDR screen followed by commencement of wave- form sweep to confirm that ANS 0 is returned from OTDR to the Hyper Ter- minal.

  • Page 72: Checking Procedure

    Section 5 Installing the Option 01/02/03 (Exchange Modules) in the Main Unit 5.3.3 Checking Procedure Switch to the OLTS mode in accordance with the MW9076 Series OTDR Opera- tion Manual. Check for Option 01 Turn Visible LD on and see red light comes out. But never look directly into the Visible LD output connector.

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