TM 11-6625-3053-14
SECTION VI. DISASSEMBLY AND ASSEMBLY
6-19.
GENERAL.
The instructions in this section give you the information to replace parts and assemblies as authorized in the
maintenance Allocation Chart in Appendix B of this manual.
Each of the replacement procedures is complete for that part or assembly. However, the steps in one pro- cedure are
not repeated in another. Instead, one procedure may make reference to one or more procedures which must be
performed prior to the one being described. For example, if the Circuit Card Assy A2A3 must be removed, the procedure
for its removal will first reference the procedures for the removal of:
-the equipment dust cover, and
-the high voltage module cover.
The replacement of a part or assembly, in most cases, will best be accomplished by reversing the actions for its removal
within a particular procedural step and reversing the order of the steps by starting with the last and ending with the first.
In these cases, the REPLACEMENT procedure will state:
REVERSE THE REMOVAL PROCEDURE.
In cases where REPLACEMENT cannot be accomplished by simple reversal of REMOVAL procedure, a detailed step-
by-step replacement procedure will be given.
You will find replacement procedures only for those items which require special care or skill for their removal or
replacement.
When you must remove parts to gain access to a particular location in the instrument, you will be instructed to remove
parts. At the end of the procedure, you will be told to replace the part which you previously removed. The use of the
word "replace" in this instance means only that the original part is to be reassembled to the signal generator.
When the instruction to replace a component is given as a result of a troubleshooting procedure, after electrical or
physical measurements, the meaning of "replace" in this case is to remove a faulty component and install a good one in
its place.
Table 6-5. INDEX OF REPLACEMENT PROCEDURES
PARA
TITLE
6-20
Replacement of Instrument Dust Cover
6-21
Replacement of Rear Panel
6-22
Replacement of High Voltage Cover
6-23
Replacement of RF Tuning Head
6-24
Replacement of DS1
6-25
Replacement of B1
6-26
Replacement of RK837 Klystron Tube A4U1
6-27
6-28
6-29
Replacement of Components on Circuit Cards
6-30
Replacement of A2 Power Supply Assy
6-31
Replacement of T1 of the A2 Power Supply
6-32
6-33
Replacement of Tracking Pot A4R1
6-34
Replacement of Power Set Probe
6-35
Replacement of Attenuator Probe
6-36
6-37
Replacement of A5 Leveling Attenuator Assembly
6-84