Anritsu MP1764C Bedienungsanleitung
Document No.: M-W1850BE-2.0
Measurement Solutions
ANRITSU CORPORATION
To ensure that this equipment is used safely, impor-
tant safety items are explained in the MP1764C Error
Detector Operation Manual.
This manual explains important service items re-
lated service. Read the operation manual, sche-
matics, and this manual, and keep these with the
equipment.
MP1764C
Error Detector
Service Manual
Second Edition
ii
MP1764C
Error Detector
Service Manual
1 April 2001 (First Edition)
2 July 2001 (Second Edition)
Copyright © 2001, 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
iii
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 you
r
country.
Before re-exporting the product or manuals, please contact us to confirm
whether they are export-controlled items or not.
iv
Part Names & Part Numbers
Please specify the part numbers shown in the parts list when making inquiries or
when ordering parts. There may be a difference between the names of parts used in
this manual and the parts actually used in the equipment or supplied for repair. This
is because equivalent part parts with the same functions, performance and reliability
as the parts specified in the circuit diagrams and parts list have been used or supplied.
Since the parts are equivalent, they have absolutely no adverse effect on the equip-
ment specified functions, performance or reliability.
v
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: An example of the double fuse is shown below:
Fuse Holders
vi
I
About This Manual
This service manual is used for the MP1764C Error Detector.
Composition of the service manual:
Service Manual: Describes circuit explanation, troubleshooting, adjustment,
mechanical configuration, PC-board numbers/names, and circuit
diagram numbers.
Schematics: Shows circuit diagrams and parts lists with the drawing num-
bers.
Service manual (M-W1850BE)
Schematics (M-W1850GE)
II
Table of Contents
About This Manual....................................... I
Section 1 General ..................................... 1-1
Section 2 Outline of Operation ................ 2-1
2.1 Block Diagram ............................................................... 2-1
2.2 Principles of Operation .................................................. 2-2
Section 3 Troubleshooting....................... 3-1
3.1 Introduction.................................................................... 3-1
3.2 Repair Policy ................................................................. 3-1
3.3 Location ......................................................................... 3-2
3.4 Countermeasure ageinst Static Electricity .................... 3-4
3.5 Service Kits.................................................................... 3-4
3.6 Equipment Required for Troubleshooting,
Repair and Calibration................................................... 3-5
3.7 Method for Checking Waveform.................................... 3-7
3.8 Overall Troubleshooting ................................................ 3-9
Section 4 Waveform at Check Point ....... 4-1
4.1 Introduction.................................................................... 4-1
4.2 Checking DC Power-supply Voltage ............................. 4-2
4.3 Waveforms .................................................................... 4-4
Section 5 Confirmation on Parts
Replacement ............................ 5-1
5.1 Note during Repair ........................................................ 5-1
5.2 Operation Confirmation after Repair ............................. 5-2
Section 6 Mechanical Configuration ....... 6-1
6.1 Introduction.................................................................... 6-1
6.2 Disassembly .................................................................. 6-2
III
Section 7 Adjustment Procedure ................ 7-1
7.1 A23 CLOCK INPUT BIAS ............................................. 7-1
7.2 A21 FREQ DIVIDER ..................................................... 7-3
7.3 A24 DATA INPUT BIAS ................................................ 7-5
7.4 A25,26 DFF1,2 BIAS..................................................... 7-7
7.5 A22 DEMUX (H)............................................................ 7-8
Appendix A Circuit Diagram ..................... A-1
IV.
Inhaltsverzeichnis
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