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Organizational, Field, Intermediate, DS,GS, & Depot Maintenance with Illustrated Parts Breakdown - Control, Transponder Set; C-6280(P)/APX, C-280A(P)/APX, C-67171APX, & C-7483/APX

1-1. GENERAL 
1-2. This publication contains descriptive and maintenance 
information for Control, Transponder Set C-6280(P)/APX, 
C-6717/APX, and C-7483/APX. These 
units were manufactured under the following contracts: 
Contract 
Type 
C-6717/APX 
F33657-68-C-0785 C-6717/APX 
F33657-68-C-0785 C-7483/APX 
NOTE 
Manufacturer 
Admiral 
Unless defined by type number, the information 
in this manual is applicable to all the transponder 
set controls listed. Also, the use Of the common 
name "transponder set control" refers to all 
units. 
1—3. This manual contains information for organizational, 
field, intermediate, direct and general support, and depot 
maintenance, and an illustrated parts breakdown, for the 
transponder set controls listed It includes 
instructions appropriate to direct and general support and 
depot for troubleshooting, testing, and repairing the equip- 
ment, and replacing maintenance parts. It also lists tools, 
materials, and test equipment for direct and general support 
and depot maintenance. Detailed functions Of the equipment 
are discussed 
1—4. Except for Serial NO. I through 3322 Of Control, 
Transponder Set C4280(P)/APX, manufactured under Con- 
tract AF33(657)-14550, the information in this manual is 
applicable to all the transponder set controls listed in para- 
graph 1 2. When these transponder set controls have been

MASTER switch and making related wiring changes. The 
replacement switch has a detent mechanism which requires 
the knob to be pulled Out before the switch can be set to 
OFF or EMER positions. Beginning with Serial NO. 3323 
Of Contract AF33(657)-14450, the modification was 
incorporated during production. 
1-5. INDEXES OF PUBLICATIONS. 
I —6. Refer to the latest issue Of (Air Force) TO. 0-1-12, 
(Navy) NAVSUP 2002, Section VI", or (Amy) DA Pam 
310+ to determine whether there are new editions, changes, 
or additional publications pertaining to the equipment. 
1 7. (Army) Refer to the latest issue of DA Pam 310-7 to 
determine whether there are modification work orders 
(MWOs) pertaining to the equipment.