Section II. DEPOT ALINEMENT

TM 11-5820-549-50-1

Figure 3-1. AN/PRR-9(XE-9) electronic unit assembly, partially exploded.

Section II. DEPOT ALINEMENT

Item

Technical manual

3-3. Test Equipment and Special Tools Required for

Alinement

Voltmeter, Electronic TM 11-624-14

The following test equipment, special tools and

AN/URM-145

materials are required for depot alinement of Receiving

Materials: Capacitor 1000

Set, Radio AN/PRR-9(XE-9).

pf, 10%,

Item

Technical manual

200 wvdc

Indicator, Channel

TM 11-666-937-12

Resistor, 75

Alignment ID-1189

ohm 5%,

(XE-2)/PRR

1/2 watt

Signal Generator AN/

TM 11-6625-573-15

GRM-50

3-4.

Use of Indicator, Channel Alinement ID-

Signal Generator AN/

TM 11-6625-586-12

1189(XE-2)/PR

URM-108

Multimeter TS-352B/

TM 11-6625-366-16

The channel alinement indicator can be used in making

battery tests, or for alinement when the channel

Voltmeter, Meter ME-

TM 11-6620-320-12

frequency of the AN/PRR-9(XE-9) is changed.

30A/U

Digital Readout, Elec-

TM 11-6625-700-10

tronic Counter AN/

3-5. 10.7 MHz i.f. Alinement

USM-207

If misalinement is indicated during troubleshooting (para

Output Meter TS-685

TM 11-5017

2-6), the 10.7 MHz i.f. stages should be alined as

A/U

follows:

Analyzer, Spectrum

TM 11-5097

a. Connect the equipment as shown in figure 3-2.

TS-723A/U

b. Set the PP-8514/U for 3.2 volts.

Power Supply PP-

TM 11-6625-617-12

c. At pin 5 of Z1, through a 0.001 uf capacitor,

3514/U

inject an unmodulated 10.7 MHz signal of sufficient

Oscillator, Audio TS-

TM 11-6625-355-12

strength to produce a 15 millivolt ac signal at TP2.

421A/U

3-2