User's Manual

ROCKWELL COLLINS
COMPONENT MAINTENANCE MANUAL with IPL
TDR-94, PART NO 622-9352
SUBTASK 34-50-96-700-004-A01
D. Alignment Procedures
(1) Refer to Table 1002/Table 34-50-96-99A-010-A01 for the alignment procedures for
the TDR-94/94D. If the final performance (customer acceptance) test successfully
completes, no alignment procedures are required.
TASK 34-50-96-810-801-A01
4. F
ault Isolation
SUBTASK 34-50-96-810-001-A01
A. Fault Isolation Philosophy
C
AUTION: REFER TO ADVISORIES PARAGRAPH IN THE INTRODUCTION FOR
ESDS HAN DLING CAU TION A ND COMPONENT WARNING.
(1) This section provides the primary information that repair personnel should use to isolate
faults in the TDR 94/94D. All sections of this manual have important data to aid in the
total repair and understanding of the unit. These sections are referenced, as necessary,
to facilitate completion of the repair tasks.
(2) Defective avionics equipment will usually fall into one of two categories: failure with a
specific complaint and failures with an unspecified complaints. The function of this
section is to guide fault isolation, first to a specific malfunction, then to the applicable
circuit area. Voltages and waveforms, in addition to the theory of operation help the
technician to isolate the faulty parts.
(3) Fault isolation and troubleshooting are performed using the test equipment listed in the
Special Tools, Fixtures, Equipment and Consum ables section of this m anual.
SUBTASK 34-50-96-810-002-A01
B. Troubleshooting Approach
(1) Unspecified Complaint
(a) Troubleshooting a unit with an unspecified complaint requires the technician to test
the unit according to the performance test to determine if a fault actually exists. In
cases where the unit passes all portions of the test and no fault is discovered, the
unit can be returned to the aircraft as good and reinstalled. However, an actual fault
may still persist and all associated equipment and aircraft wiring should be checked.
(b) When a unit does fail the performance t est, the next objective is to isolate the actual
fault or faults, and begin in-depth troubleshooting procedures. Begin by performing
the specific fault isolation procedure(s) in this section.
34-50-96
Page 1002
May 18/06