Anritsu MP1802A User manual

Document No.: M-W1960BE-1.0
Measurement Solutions
ANRITSU CORPORATION
MP1802A
43.5G DEMUX
Service Manual
First Edition
To ensure that this equipment is used safely, impor-
tant safety items are also explained in the MP1802A
43.5G DEMUX Operation Manual.
This manual explains important service items relat-
ed to service.
Read both the operation manual and this manual,
and keep both with the equipment.

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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 sym-
bols BEFORE using the equipment. 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.
Symbols used in manual
This indicates a very dangerous procedure that could result in serious injury or
death if not performed properly.
This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
This indicates a hazardous procedure or danger that could result in light-to-severe
injury, or loss related to equipment malfunction, if proper precautions are not taken.
Safety Symbols Used on Equipment and in 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 sym-
bolically in or near the barred circle.
This indicates an obligatory safety precaution. The obligatory operation is indi-
cated 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.
MP1802A
43.5G DEMUX
Service Manual
10 May 2002 (First Edition)
Copyright © 2002, 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
DANGER
WARNING
CAUTION

For Safety
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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 opera-
tion, 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. When supplying power to this equipment, connect the accessory 3-
pin power cord to a grounded outlet. If a grounded outlet is not
available, before supplying power to the equipment, use a conversion
adapter and ground the green wire, or connect the frame ground on
the rear panel of the equipment to ground. If power is supplied
without grounding the equipment, there is a risk of receiving a severe
or fatal electric shock.
3. This equipment cannot be repaired by the user. DO NOT attempt 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-voltage parts in this equipment present-
ing a risk of severe injury or fatal electric shock to untrained person-
nel. In addition, there is a risk of damage to precision parts.
4. 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.
Repair
Falling Over

For Safety
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CAUTION
1. Before changing the fuses, ALWAYS remove the power cord from the
poweroutlet and replace the blown fuses. ALWAYS use new fuses
of the type and rating specified on the fuse marking on the rear panel
of the cabinet.
T3.15A indicates a time-lag fuse.
T3.15A indicate a normal fusing type fuse.
There is risk of receiving a fatal electric shock if the fuses are re-
placed with the power cord connected.
2. Keep the power supply and cooling fan free of dust.
•Clean the power inlet regularly. If dust accumulates around the
power pins, there is a risk of fire.
•Keep the cooling fan clean so that the ventilation holes are not ob-
structed. If the ventilation is obstructed, the cabinet may over-
heat and catch fire.
3. NEVER input a signal of more than the specified maximum power
between the measured terminal and ground. Input of an excessive
signal may damage the equipment.
Changing Fuse
Cleaning
Check Terminal

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Equipment Certificate
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 laborato-
ries including the Electrotechnical Laboratory, the National Research
Laboratory of Metrology and the Communications Research Laboratory,
and was found to meet the published specifications.
Anritsu Warranty
Anritsu Corporation will repair this equipment free-of-charge if a mal-
function occurs within 1 year after shipment due to a manufacturing fault,
provided that this warranty is rendered void under any or all of the fol-
lowing conditions.
•The fault is outside the scope of the warranty conditions described in
the operation manual.
•The fault is due to mishandling, 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 cus-
tomer.
•The fault is due to natural disaster including fire, flooding, 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 pur-
chaser. 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 rep-
resentatives at the address in this manual.

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Notes On Export Management
This product and its manuals may require an Export License/Approval by
the Government of the product's country of origin for re-export from your
country.
Before re-exporting the product or manuals, please contact us to confirm
whether they are export-controlled items or not.
When you dispose of export-controlled items, the products/manuals are
needed to be broken/shredded so as not to be unlawfully used for military
purpose.
Disposing of Product
This equipment uses chemical compound semiconductors including
arsenide, and a lithium battery. At the end of its life, the equipment
should be recycled or disposed properly according to the local disposal
regulations.

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CE Conformity marking
Anritsu affixes the CE Conformity Marking on the following product (s) in
accordance with the Council Directive 93/68/EEC to indicate that they
conform with the EMC and LVD directive of the European Union (EU).
CE Marking
1. Product Model
Model: MP1802A 43.5G DEMUX
2. Applied Directive
EMC: Council Directive 89/336/EEC
LVD: Council Directive 73/23/EEC
3. Applied Standards
EMC: Emission: EN61326: 1997/A1: 1998 (Class A)
Immunity:EN61326: 1997/A1: 1998 (Annex A)
Performance Criteria*
IEC61000-4-2 (ESD) B
IEC61000-4-3 (EMF) A
IEC61000-4-4 (Burst) B
IEC61000-4-5 (Surge) B
IEC61000-4-6 (CRF) A
IEC61000-4-8 (RPFMF) A
IEC61000-4-11 (V dip/short) B
*: Performance Criteria
A: During testing normal performance within the specifi-
cation limits.
B: During testing, temporary degradation, or loss of func-
tion or which is self-recovering.
Harmonic current emissions:
EN61000-3-2: 1995/A2: 1998 (Class A equipment)
LVD: EN61010-1: 1993/A2: 1995 (Installation Category II, Pol-
lution Degree 2)

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C-tick Conformity marking
Anritsu affixes the C-tick marking on the following product (s) in accor-
dance with the regulation to indicate that they conform with the EMC
framework of Australia/New Zealand
C-tick marking
1. Product Model
Model: MP1802A 43.5G DEMUX
2. Applied Standards
EMC: Emission:
AS/NZS 2064.1/2 (ISM, Group 1, Class A equipment)

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Power Line Fuse Protection
For safety, Anritsu products have either one or two fuses in the AC power
lines as requested by the customer when ordering.
Single fuse: A fuse is inserted in one of the AC power lines.
Double fuse: A fuse is inserted in each of the AC power lines.
Example 1: An example of the single fuse is shown below:
Fuse Holder
Example 2: An example of the double fuse is shown below:
Fuse Holders

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About This Manual
This service manual written for service personnel trained by Anritsu
Service Training Course and explain how to service Anritsu MP1802A
43.5G DEMUX, and how to troubleshoot faults.
This manual explains repair by exchanging modules but does not describe
parts-level repair of modules.
For specifications, operating instructions and details of panel controls of
MP1802A 43.5G DEMUX, refer to the separate operation manual.
Section 1 Outline of Operation
This section describes the configuration and the simple block diagram of
this system.
Section 2 Troubleshooting
This section describes how to pinpoint faulty modules.
Section 3 Checking Equipment
This section describes how to Checking Equipments.
Section 4 Replacing Modules
This section describes how to replace modules.

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Table of Contents
For Safety ................................................... iii
About This Manual....................................... I
Section 1 Outline of Operation................. 1-1
1.1 Exchange Module Lists................................................. 1-2
1.2 Block Diagram............................................................... 1-3
1.3 Functions of Modules.................................................... 1-4
1.4 Serial Number and Option Number .............................. 1-5
Section 2 Troubleshooting....................... 2-1
2.1 General ......................................................................... 2-2
2.2 Troubleshooting Preliminaries ...................................... 2-3
2.3 Required Equipment ..................................................... 2-5
2.4 Checking Power Supply................................................ 2-6
2.5 Checking Each Modules ............................................... 2-9
Section 3 Checking Equipment................ 3-1
3.1 General ......................................................................... 3-2
3.2 Block Diagram............................................................... 3-3
3.3 Location of Top View .................................................... 3-4
3.4 Location of Bottom View ............................................... 3-5
3.5 Typical Output Waveform ............................................. 3-6
Section 4 Replacing Modules .................. 4-1
4.1 Disassembly.................................................................. 4-2
4.2 Inspection Method......................................................... 4-12
4.3 Total Circuit Diagram .................................................... 4-24

Section
SectionSection
Section 1 Outline of Operation
1 Outline of Operation1 Outline of Operation
1 Outline of Operation
1-
1-1-
1-1
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1
1
Outline of Oper
Outline of OperOutline of Oper Outline of Opera
aa ation
tiontion tion
1.1 Exchange Module Lists.............................................. 1-2
1.2 Block Diagram............................................................ 1-3
1.3 Functions of Modules................................................. 1-4
1.4 Serial Number and Option Number ........................... 1-5

Section 1
Section 1Section 1
Section 1 Outline of Operation
Outline of OperationOutline of Operation
Outline of Operation
1-
1-1-
1-2
22
2
1.1 Exchange Module Lists
MP1802A is composed of the 6 exchange modules listed at Table 1-1.
In case MP1802A has a fault, it can be repaired by changing a module
which causes the fault.
Table 1-1 Exchange Module of MP1802A
Parts number Name Construction drawing number
MM100241A ZERO CROSS 44Y111361
MM100243A CK AMP2 44Y111200
MM100249A 1/4 DATA OUT 44Y111359
MM100250A 1/4 CK OUT 44Y111360
MM100251A DEMUX 44Y111204
MM100252A JWT75-522/A NO1379

1.2
1.21.2
1.2 Block Diagram
Block DiagramBlock Diagram
Block Diagram
1-
1-1-
1-3
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3
1
Outline of Oper
Outline of OperOutline of Oper Outline of Opera
aa ation
tiontion tion
1.2 Block Diagram
1/1 Input Clock
1/4 CK 1
A06
40GDEMUX
MHL71520
A05
1/4 DATA OUT
1/4 CK OUT
1/4 Data Output 1
1/4 Clock Output 1
MHL71500
CK AMP2
1/4 DATA
Delay Delay A04
A03
1/1 Input Data
1/4 Data Output 2
1/4 Data Output 3
1/4 Data Output 4
1/4 Clock Output 2
1/4 Clock Output 3
1/4 Clock Output 4
Fig. 1-1 Block Diagram of MP1802A
Fig. 1-1 shows the block diagram of the MP1802A.

Section 1
Section 1Section 1
Section 1 Outline of Operation
Outline of OperationOutline of Operation
Outline of Operation
1-
1-1-
1-4
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1.3 Functions of Modules
(1) MM100251A DEMUX
This module makes de-multiple 4 data signals.
4 data signals of 6.25 to 10.875 Gbit/s are output.
(2) MM100241A ZERO CROSS
This module is the ZERO CROSS circuit of the power supply.
(3) MM100243A CK AMP2
This module amplifies the clock signal.
(4) MM100249A 1/4 DATA OUT
This module restores the data signal that was divided to 4 from DE-
MUX the wave-like.
(5) MM100250A 1/4 CK OUT
The clock signal of the DEMUX output these 4 module branch.
(6) MM100252A JWT75-522/A
This module supplies −12 V, −5 V, and +5 V DC power to each module.

1.4
1.41.4
1.4 Serial Number and Option Number
Serial Number and Option NumberSerial Number and Option Number
Serial Number and Option Number
1-
1-1-
1-5
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1
Outline of Oper
Outline of OperOutline of Oper Outline of Opera
aa ation
tiontion tion
1.4 Serial Number and Option Number
Serial number plate is attached to the rear panel of the instrument. Serial
number consist of “SN” and ten digit. Serial number is unique to each
instrument. If the instrument is out of order, please tell us the serial
number of contacting us.

Section 1
Section 1Section 1
Section 1 Outline of Operation
Outline of OperationOutline of Operation
Outline of Operation
1-
1-1-
1-6
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Section
SectionSection
Section 2 Troubleshooting
2 Troubleshooting2 Troubleshooting
2 Troubleshooting
2-
2-2-
2-1
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1
2
Troubleshooting
TroubleshootingTroubleshooting Troubleshooting
2.1 General ...................................................................... 2-2
2.2 Troubleshooting Preliminaries ................................... 2-3
2.2.1 Preventing static electricity............................ 2-3
2.2.2 Connection of the problem
investigation module...................................... 2-3
2.2.3 Setting of the equipment................................ 2-4
2.3 Required Equipment .................................................. 2-5
2.4 Checking Power Supply............................................. 2-6
2.4.1 Checking Voltage Between Power Supply
Pins................................................................ 2-6
2.4.2 Check the voltage of A01 ZERO CROSS ..... 2-7
2.4.3 Check the voltage of A02 Power Supply ....... 2-8
2.5 Checking Each Module.............................................. 2-9
2.5.1 General .......................................................... 2-9
2.5.2 Searching the troubled module ..................... 2-9

Section
SectionSection
Section 2
22
2 Troubleshooting
TroubleshootingTroubleshooting
Troubleshooting
2-
2-2-
2-2
22
2
2.1 General
This section describes how to pinpoint the exact module causing the fault
of MP1802A.
When the faulty module is pinpointed, replace the faulty module to new
one referring to ‘Section4 Replacing Modules’ of this manual.