Table 6-7.--Operation Procedures for the Common Panel Test Set

Table 6-7.--Operation Procedures for the Common Panel Test Set--Continued

NORM

REF

CONTROL OR

DESCRIPTION

FUNCTION

INDICATOR

DESIG

POS

LEVEL DETECTOR

TESTS 2:

Lever switch, two

Center

ATB TIMER-

Used to teat ATB 45-second time-

position nonlocking;

MINOR ALARM

out and minor alarm circuitry in

and

lamp, red lens cap

DS7

and associated

level detector circuit module.

lamp

LEVEL DETECTOR

AND LINK ALLOT-

TER MULTIPLE

CIRCUIT TEST:

LAMP 1, LAMP

DS8, Lamp, red lens cap

Used in conjunction with ROTARY

2, and LAMP 3

SWITCH and TEST 1-NORM-TEST

DS9,

2 switch to indicate proper re-

and

DS1O,

sponses of tested circuit modules.

resp.

ROTARY SWITCH:

4-pole, 17-position

OFF and 1

OFF

Used in conjunction with TEST 1-

NORM-TEST 2 switch to test level

rotary switch

through 15

detector and link allotter circuit

modules. Selects level or link-

allotment circuits to be tested.

DS11

Detects any shorts in 02 connector

SHORT

and link allotter circuit modules

as ROTARY SWITCH is turned.

Used in conjunction with ROTARY

Lever switch, two-

NORM

TEST 1-NORM-

SWITCH. Tests level relays and

position nonlocking

TEST 2

muting circuit in level detector

circuit module; also tests link

allotment and bypass relays in

link allotter circuit module.

cover must be removed. It is tested after the chassis

stations. The faults tested for are system positive to

tests are completed.

hull, system negative to hull, tip to hull, ring to hull,

and tip to ring. Faults are measured in ohms, with 50K

The test set uses the principle of simulating certain

ohms being the minimum.

external circuit conditions, including the operation of

the XY switch to check the module for proper

The line fault routiner receives all power from the

response. Failure to respond is indicated by certain

cabinet under test via interconnect cables, and may be

lights being either off or on.

used with the MDM 200/700 or MDM 50/100 system.

The control and indicator descriptions shown in

Once the unit is connected to the system, lever

table 6-8 correspond to the link panel test set shown

switches (keys) are used for starting and/or stopping

in figure 6-42.

various tests. Lamps are provided along with an

ohmmeter for visual interpretation of test results. The

LINE FAULT ROUTINER.-- The line fault

routiner causes the XY switch to automatically

routiner (fig. 6-43) is used to test for line faults from

the wire bank through internal cabinet wiring to the

sequence to level 1 (X direction) and sequence to each

line panel (600 assembly) and out to the individual line

Y position until all 10 positions in the Y direction have

6-47