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M3500B/M5500B Service Manual
Diagnosing Internal Failures
The following steps will help you isolate an internal failure to a particular
subassembly.
Run Self Tests
To run the Self Tests, perform the following steps:
1. Enter Diagnostic Mode. See "Accessing Diagnostic Mode" on page 3-6.
2. Run the Extended Self Test. See "Extended Self Test" on page 2-17.
3. Run the individual Diagnostic Tests that are applicable to the problem.
Diagnostic Tests are described starting with "User Interface Tests" on
page 2-19.
Use the Troubleshooting Tables
Use the Tables provided starting on page 3-8 to isolate the problem based on
factors such as:
Error codes reported in the System Log (Table 3-2, page 3-11).
Extended Self Test failures (Table 3-6, page 3-18).
Operational problems (starting with Table 3-7 on page 3-19).
Configuration and Diagnostic Modes
Some of the Troubleshooting procedures look for responses from the unit that
are dependent on that unit's configuration. Similarly, many procedures
require that the unit be in Diagnostic Mode. Follow the instructions given
below to enter these modes.
Accessing Configuration Mode
These instructions describe briefly how to enter Configuration Mode. See the
Instructions for Use for details on configuration settings and what effect they
have.
1. Make sure the power is off.
2. If you intend to save the configuration to a Data Card (or load the config-
uration from a Data Card), insert the Data Card now.
3. Press softkeys 4 and 5 at the same time, and hold them down while turn-
ing the power on. See Figure 3-1 for softkey numbering.
To select a configuration, press the
or down the list until the desired Settings item is highlighted. Then
press the
ENTER
To print out a strip with all the current configuration choices, select
Print All Settings and press
Diagnosing Internal Failures
and
softkey to access those settings.
.
ENTER
softkeys to move up
3-5
3
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