Teledyne ADFM Analog Output Module, Technical Manual, Page: 55 / 156

ADFM Troubleshooting
Chapter
6
ADFM Troubleshooting
6-1 Introduction
This chapter describes how to isolate faults. The provided information be-
low assumes that faults are isolated with a large degree of certainty to a
least replaceable assembly (LRA) level only. Considering the complexity
of the ADFM it is MGD Technologies Inc.’s intention to provide as much
information as it seems practical for field repair. Fault isolation to the com-
ponent level is beyond the scope of these instructions.
The time to repair the system in the field will be minimized if an entire re-
placement unit is available, that is a transducer, an Electronics Unit, and a
transducer cable. For efficient field service, MGD Technologies Inc.
strongly advises the availability of at least the listed LRAs, but an entire
replacement system is recommended (a LRA is either a printed circuit board
assembly or a entire module). LRA’s are listed for completeness in
Chapter
4 , including the ordering numbers and other replacement parts and their or-
dering numbers.
Table 6-1: List of Least Replaceable Assemblies
LRA: Description:
Front Panel Interface Front panel interface board
LCD The front panel LCD display unit.
Modem Interface Modem interface board, not including the Modem.
Modem The fax/data Modem unit.
Motherboard The Electronics Unit motherboard.
Recorder PCMCIA-Recorder Board.
Transducer The entire transducer head, which includes transducer electronics,
transducer housing, transducer ceramic assemblies, and cable.
ADFM Motherboard The entire ADFM Motherboard assembly, excluding the Modem and
Recorder and its associated components.
ADFM Technical Manual (January 2000) page 6-1