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Land Mobile Products Sector
1301 E. Algonquin Road, Schaumburg, IL 60196
68P02943C68-0
July, 1995
Digital Multimeter
Diagnostics Software
Radio Service Software
IBM PCI AT or compatible
Dual DC power supply,
o
to 20 V DC, 0 to 2 A
Current measuring tester
(1 A maximum)
GENERAL
R1072A or Fluke 87
or equi valent
Hewlett Packard 8903A/B or '
equivalent
Personal Computer
RVN4133
Hewlett Packard 6632A or
Lambda LK340AFM or
equivalent
Table 1. Recommended Test and Service Equipment
VRM 500 problem
•
DTE problem
•
Radio fault
Cables and connection faults
Improper configuration
MAINTENANCE
& TROUBLESHOOTING
Fluke 87 or equivalent
Unspecified, specialized
depot only
3. TROUBLESHOOTING
3.1
Abnormal VRM 500 operation may be due to any of the
following:
3.2
TEST AND SERVICE EQUIPMENT
The following test equipment and service aids (or
equivalents) are required to maintain the VRM 500.
Test the VRM 500 in the following sequence.
3.3
TESTING THE VRM 500
The surfaces should be cleaned only when the VRM 500 has
been disassembled for repair and a visual inspection reveals
the presence of smudges, grease, or grime. Refer to
paragraph 6 for disassembly procedure.
2. CHECKING AND CLEANING THE
VRM500
This section contains the following information:
Quick troubleshooting procedures
Disassembly and reassembly procedure including
safety information
•
General maintenance information
1. GENERAL
Always use a fresh supply of isopropyl alcohol and a clean
container to prevent contamination by dissolved material
from previous usage.
Isopropyl alcohol may be applied with a stiff, non-metallic,
short-bristled brush to dislodge embedded or caked material
located in hard-to-reach areas. The brush stroke should
direct the dislodged material out and away from the
VRM 500.
Alcohol is a high-wetting liquid and can carry contamination
into unwanted places if an excessive quantity is used. Make
sure that components are not soaked with the liquid. Do not
use high-pressure air to hasten the drying process. This
could cause the liquid to collect in unwanted places. Use a
soft, absorbent, lintless cloth to dry the area.
®
MOTOROLA
©
Motorola Inc., 1995
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