User's Manual

using a second cloth moistened in clean water, and clean any dirt or debris from the fan grill and
louvers on the front side.
NOTICE: Internal surfaces should be cleaned only when the repeater is disassembled for
service or repair.
The only factory recommended liquid for cleaning the printed circuit boards and their components is
isopropyl alcohol (100% by volume).
Cleaning Internal Circuit Boards and Components
Isopropyl alcohol (100%) may be applied with a stiff, non-metallic, short-bristled brush to dislodge
embedded or caked materials located in hard-to-reach areas. The brush stroke should direct the
dislodged material out and away from the inside of the repeater. Make sure that controls or tunable
components are not soaked with alcohol. Do not use high-pressure air to hasten the drying process
since this could cause the liquid to collect in unwanted places. Once the cleaning process is complete,
use a soft, absorbent, lintless cloth to dry the area. Do not brush or apply any isopropyl alcohol to the
top cover and repeater enclosure.
NOTICE: Always use a fresh supply of alcohol and a clean container to prevent contamination
by dissolved material (from previous usage).
11.4
Safe Handling of CMOS and LDMOS Devices
Complementary metal-oxide semiconductor (CMOS) and laterally diffused metal-oxide semiconductor
(LDMOS) devices are used in this family of stations, and are susceptible to damage by electrostatic or
high voltage charges. Damage can be latent, resulting in failures occurring weeks or months later.
Therefore, special precautions must be taken to prevent device damage during disassembly,
troubleshooting, and repair.
Handling precautions are mandatory for CMOS/LDMOS circuits and are especially important in low
humidity conditions.
DO NOT attempt to disassemble the repeater without first referring to the following CAUTION
statement.
MN001436A01-AD
Chapter 11: SLR 5000 Series Maintenance and Disassembly/Reassembly
98 Send Feedback