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CHAPTER 4
MAINTENANCE
INTRODUCTION
The primary purpose of this chapter is to describe the recommended trouble-
shooting method to be used with the LDM products. It should be referred to
if ever a questionable symptom arises during the operation of any LDM
device.
The LDM products are designed to provide users with many years of trouble-
free operation. There are no user serviceable components in any LDM device.
There are no consumable items or supplies that need to be replaced or replen-
ished. The user may, occasionally, need to wipe dust away from the external
surfaces of a unit. This should be done with a clean, dry cloth. The mechani-
cal design of the housing and chassis provide the electronic assemblies with a
nearly sealed environment. Due to the low power requirement of each prod-
uct, ventilation holes are not required. The inside of each unit should remain
clean indefinitely.
PCB REMOVAL AND INSERTION
The PCB inside the standalone version LDM-1 should never be removed
from its aluminum case. Internal jumpers and switches are accessible once the
top cover is removed. However, access to the user configured settings of the
LDM-1 plug-in PCB installed within the LDM-16 nest require removal of the
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