User's Manual

9-26 68P81093C75-A

If the cleaning of gold-plated contacts is required, use a soft cloth

dampened with alcohol to lightly wipe the contacts. Be sure not to

touch the contact surfaces with your ﬁngers; ﬁnger oils and salts can

contaminate the contact surfaces.

Power Down Station

Before Removing/

Inserting Modules

Before removing or inserting a module into the station chassis and

engaging the backplane connector, be sure to turn off the station

power by unplugging the AC or DC power cord, or both.

Validating Repairs After replacing a faulty module with a module that is known to be in

good condition, perform the following tests to validate the repair.

• If the faulty module was detected as the result of running station

diagnostics via the RSS, run the diagnostics again after the

repair is made to ensure that the replacement module passes all

diagnostic tests.

• If the faulty module was detected by an operational failure,

perform the operation to ensure that the repair corrected the

reported or detected failure.

Module Replacement This section discusses the replacement of each of the PDR 3500’s

modules and related requirements and considerations.

Station Control Before Removing the Old Station Control Module

A new SCM contains settings in a codeplug (EEPROM). Those

settings can be conﬁgured, using the RSS, after the module has been

installed.

If the old SCM is capable of communicating with the RSS, the old

codeplug can be read from the SCM and saved to disk to be

programmed into the new SCM. This is described in the Setup and

Connections section of this manual, and in the RSS User’s Guide

(68P81085E35).

If the old SCM is incapable of communicating with the RSS, an

archival codeplug (one saved on disk) can be used to program the

new SCM. If an archival codeplug is unavailable, the new codeplug

will have to be manually conﬁgured after installation.

Physical Replacement of

the Station Control

Module

1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the 8 Phillips screws from the edges of the station’s top

panel and lift the chassis out of the case.