Introduction; General Guidelines For Assembly Level Troubleshooting - Zeiss humphrey HFA II-i series Field Service Manual

Humphrey Field Analyzer II - i
5.1

Introduction

The troubleshooting aids in this section provide the Field Service Engineer several aids for
problem diagnostics of the HFA II - i. As Field and Repair Center experience identifies
recurrent problems and appropriate diagnostic processes, the section will be expanded to
include additional troubleshooting aids.
5.2 General Guidelines for Assembly Level
Troubleshooting
On-site assembly level troubleshooting poses unique and complex challenges to the Field
Service Engineer. In addition to identifying and replacing the faulty assembly, the Field
Service Engineer must often travel great distances to the customer location, resolve operator
errors, and identify power and environmental causes of problems while satisfying the
customer's perception of quality service.
A structured approach to resolving field problems can greatly increase customer satisfaction
and the Field Service Engineer's effectiveness. There are seven major tasks in resolving field
equipment problems:
Prior to Going On-Site
1. Obtain a Service History for the
Instrument
2. Query the Operator of the
Instrument
3. Check for Field Service Bulletins
that Address the Problem
Each of these tasks is explained below.
Prior to Going On-Site:
1) Obtain a Service History for the Instrument.
Knowledge of previous problems will assist your troubleshooting efforts. Find out when
the last Preventive Maintenance (PM) service call was performed (if applicable). If a
PM is due, or will be due shortly, be prepared to perform this task in addition to the
repair.
Query the Operator of the Instrument.
2)
Get a description of the problem and inform the operator that you will need him/her to
demonstrate the problem to you when you arrive. A description of the problem should
include the symptoms displayed and also the type of problem. Determining the type of
problem helps you establish your approach to solving the problem and confirming the
repair. All problems can be broadly categorized into one of three types:
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While On-Site
4. Have the Operator Demonstrate the
Problem
5. Resolve the Obvious
6. Substitute the Failing Assembly
7. Confirm the Repair
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Troubleshooting
Field Service Guide