Figure 8-1. Assembly Locations

T.O. 12P4-2APX-192

NAVAIR 16-35TS1843-1

TM 11-6625-1646-25

6 AMP POWER circuit breaker

Each block in figure 8-6 contains specific instructions which,

METER SELECT

when followed, will result in one of the conditions indicated by

DC CONTROL

Adjust for

a line. By following the line indicating the observed condition

28 volts dc.

the technician will be let to a faulty circuit board which should

METER SELECT

be replaced or in some cases to a troubleshooting table. The

AC CONTROL

Adjust for

troubleshooting table will enable the technician to perform a

115 volts ac.

limited amount of maintenance. The chart will also point out

TEST CONDITION

VOLTS

those faulty indications for which repair is restricted to depot

4. To troubleshoot assemblies A2 thru A4 use the extender

maintenance. After the faulty assembly has been repaired or

cards.

replaced, return to the starting point.

To perform the

5. When operating the TS-1843A/APX in the monitor mode,

troubleshooting procedures of figure 8-6. proceed as follows:

position controls on AN/UPM-98A as follows:

1. Prepare the TS-1843A,'APX for troubleshooting (refer to

POWER Switches

section III).

CAL-CONTROL panel

2. Connect equipment as Illustrated in figure 7-1. Turn on test

METER SELECT

500 PRF

equipment and allow adequate warm-up time per

XTAL MARK & SYNC panel

manufacturer's instructions. Position controls on C-6280(P),

PRF

Adjust for

APX or C-6280A(P)/APX as follows:

CAL-CONTROL

MASTER

NORM

meter indication

IDENT OUT/MIC

OUT

of 400.

M-1/ON/OUT

SYNC

INT.

M-2/ON/OUT

SIF CODER panel

M-3/A/ON/OUT

CODE A through D

M-C/ON/OUT

SUB PULSE SELECT

OFF

MODE 1 CODE

FUNCTION

MODE 3/A/CODE

7700

LEVEL

RAD TEST/OUT/MON

MON

PULSE WIDTH

.45

3. Place AN APM-239A controls and switches in the

AMPLITUDE

following positions:

6. Perform troubleshooting in accordance with fig-

ALTITUDE DIGITIZER

OUT

ure 8-6

POWER MODE

AC, DC

8-2