1-11. Differences In Models
Test facilities Kit MK-980A/PPS-5 differs from Test
(2) Four access holes have been added to the
Facilities Kit MK-980/PPS-5 as follows:
a. Special Purpose Electrical Cable Assem-
adjustment of potentiometers R46, R48, R50, and
bly CX-12067/U (fig.1-2 . is added to the accessory
R51 without removing the cover.
kit to permit testing Electrical Headset H-2Sl/U
(3) A plastic protective cover has been added to
(which has a 5-pin connector plug instead of a
cover the back of CRT TEST switch S17 (fig. 7-2) for
telephone plug). Cable CX-12067/U has a S-contact
added safety of maintenance personnel.
receptacle on one end and a telephone plug on the
o t h e r , and it serves as an adapter cable for
7-7) are conformal coated to protect the compo-
connecting headset H-251/U to the telephone jack
nents from moisture and fungus.
on the test panel.
(5) Test panel SB-3004A/PPS-5 is secured to
b. Special Purpose Branched Electrical Cable
case CY-6208/PPS-5 with 14 captive screws instead
Assembly CX-10441A/PPS-5 (fig. l-2 ) replaces
of 16 machine screws.
cable assembly CX-10441/PPS-5. The two cables
are functionally interchangeable, but the con-
struction of cable CX-10441A/PPS-5 is an im-
e. Other miscellaneous differences exist between
provement over that of cable CX-10441/PPS-5.
equipment of the same models or between models
c. Special Purpose Electrical Cable Assembly
as a result of modifications or from production
CX-10444A/PPS-5 (fig, 1-2 ) replaces cable assem-
updates as follows:
bly CX-10444/PPS-5. The female connector of the
verters in some equipment include a 6 volt ac
replacement cable is made smaller to fit the block
400 boxcar and audio amplifier in receiver-
(2) AC test points have been installed on the
d. Electrical Test Panel SB-3004A/PPS-5 differs
some equipment to provide 6-volt ac for testing the
from SB-3004/PPS-5 as follows:
operation of the TR unit solid state local oscillator
(1) The abbreviated names of AN/PPS-5 plug-
in circuits have been added to the test block
(SSLO) on AN/PPS-S, AN/PPS-5A or AN/PPS-5B