C4, TM 11-5820-765-12
1-3.4. Destruction of Army Electronics Materiel
CAUTION
Destruction of Army electronics materiel to pre-
D u e to the weight of Power Supplies
vent enemy use shall be in accordance with TM
PP-4763/GRC and PP-4763A/GRC, two
750-244-2.
people are required for ease of handling,
and to avoid possible injury to personnel,
Page 1-2. Add paragraph 1-7 after paragraph 1-6.
or damage to equipment.
1-7. Items Comprising an Operable Equipment
Subparagraph 2-2b. The second and third sen-
Power Supply PP-4763/GRC (NSN 5820-00-937-
tences are superseded as follows: If a packing slip
7690) or Power Supply PP-4763A/GRC (NSN
is not available, check the equipment against
5820-00-113-9768) is an operable equipment.
paragraph 1-7. Report all discrepancies in ac-
Page 2-1. Add the following CAUTION after
cordance with AR 735-11-2.
subparagraph 2-lb(2):
Page 3-1. Chapter 3 is superseded as follows:
CHAPTER 3
OPERATOR'S MAINTENANCE
ness reporting criteria.
3-1. Scope of Operator's Maintenance
(4) Use the ITEM NO. column in the PMCS
The maintenance duties assigned to the operator
table to get the number to be used in the TM
of the power supply are listed below together with
ITEM NO. column on DA Form 2404 (Equipment
a reference to the table or paragraph covering the
Inspection and Maintenance Worksheet) when
specific maintenance function.
you fill out the form.
a. Operator's preventive maintenance checks and
b. Routine checks like CLEANING, PRESER-
services (table 3-1).
VATION, DUSTING, WASHING, CHECKING
b. Cleaning (para 3-3b).
FOR FRAYED CABLES, STOWING ITEMS NOT
Paragraph 3-2 is deleted.
IN USE, COVERING UNUSED RECEPTACLES,
CHECKING FOR LOOSE NUTS AND BOLTS
3-3. Operator's Preventive Maintenance
AND CHECKING FOR COMPLETENESS are not
NOTE
listed as PMCS checks. They are things that you
Refer to TM 750-244-2 for proper pro-
should do any time you see they must be done. If
cedures for destruction of this equipment
you find a routine check like one of those listed in
to prevent enemy use.
your PMCS, it is because other operators reported
problems with this item.
a. Operator/crew preventive maintenance is the
NOTE
systematic care, servicing and inspection of equip-
When you are doing any PMCS or routine
ment to prevent the occurrence of trouble, to re-
checks, keep in mind the warnings and
duce downtime, and to maintain equipment in
cautions.
serviceable condition. To be sure that your equip-
ment is always ready for your mission, you must
WARNINGS
do scheduled preventive maintenance checks and
Be careful when working on the 115- or
services (PMCS).
230-volt ac line connections. Serious in-
jury or DEATH may result from contact
(1) BEFORE OPERATION, perform your B
with these terminals.
PMCS to be sure that your equipment is ready to
go.
Low-voltage, high amperage current is
present at output connections and at con-
(2) DURING OPERATION, perform your D
nections inside equipment. Do not touch
PMCS. This should help you to spot small troubles
connections or remove cabinet cover until
before they become big problems.
equipment is removed from power source.
Reenergize power supply before perform-
(3) When an item of equipment is reinstalled
ing any maintenance.
after removal, for any reason, perform the neces-
Adequate ventilation should be provided
sary B PMCS to be sure the item meets the readi-
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