Instruction manual

Assembly-Level Service Guide xiii
Preface
This guide provides assembly-level service information for the Agilent 53131A and
Agilent 53132A Universal Counters, and the Agilent 53181A Frequency Counter.
How to Use This Guide
Repair Strategy
This service guide is designed to isolate failures to the assembly level only.
The Agilent 53131A/132A/181A Counter can be returned to Agilent Technologies for
all service work, including troubleshooting, and verifying specifications. Contact
your nearest Agilent Technologies Sales and Service Office for more details.
Note: there is an Express Repair/Performance Calibration Service for USA customers
if downtime is critical. You can receive your repaired Counter via overnight shipment.
Just call 800-403-0801 and ask for Express Repair/Performance Calibration Service
.
When your Counter is repaired, it will be returned via overnight shipment at no extra
charge.
If you decide to service the Counter yourself, use the troubleshooting procedures in
Chapter 2 (Service) and the disassembly and reassembly procedures in Chapter 3
(Replacing Assemblies). Then use the calibration instructions in Chapter 2 to
calibrate the Counter for peak-performance operation, and finally perform the
complete performance tests in Chapter 1 to verify the Counter's specifications.
Instrument Identification
Instrument identification is made from the serial number on the rear panel of the
Counter. Agilent uses a two-part serial number with the first part (prefix) identifying a
series of instruments and the second part (suffix) identifying a particular instrument
within a series. An Agilent-assigned alpha character between the prefix and suffix
identifies the country in which the instrument was manufactured.