Processor Synchronizing Modification Procedure

TM 5-6350-262-14/1

NAVELEX 0967-LP-466-9012

TO 31S9-4-36-1 Chg 2

(6) Lay the wire along the path of the

d. Transceiver PC Board Installation Procedure

dashed line in figure 7-2.

(fig. C-3).

(7) Solder the remaining end of the wire to

(1)

Orient the pc board so that the

the spill of terminal TB2-5.

transistors Q1 and Q2 are adjacent to the receiver

(8) Trim the leads of a .01 microfarad 50V

transducer with the short attaching lead (3 inches

capacitor so that the capacitor will fit snugly across

long). The RANGE control will be located mid way

terminals TB2-5 and TB2-6 (topside of pc board) on the

between the enclosure ends. Secure the pc board to the

component side of the barrier terminal strip.

plastic supports using three 4 x inch long pan head

(9) Install spade terminal lugs on the leads

sheet metal screws.

of the capacitor.

(2) Connect the transmit transducer red and

(10) Install the capacitors across terminals

blue leads (8 inches long) to their respective terminals

TB2-5 and TB2-6.

adjacent to the RANGE control.

(11) Reinstall the pc board.

(3) Connect the receive transducer red and

(12)

Disconnect the RED reference

blue leads (3 inches long) to their respective terminals

transducer lead (Fig. 2-5).

adjacent to transistors Q1 and Q2.

(13) Insulate the end of the RED reference

(4) Connect the black lead from the chassis

transducer lead with electrical tape.

ground to its respective terminal (BLK) on the pc board.

b. Testing.

(5)

Connect the appropriate leads

(1) Install a synchronizing connection of

(identified by tags) to terminals on terminal board TB1.

RG58/U coaxial cable between the master processor

slave processor and between adjacent Slaves as shown

7-10A. Processor Synchronizing Modification

on FO-1A.

Procedure

(2) Apply +20V d. c. across terminals TB1-7

and TB1-8 of each signal processor. TB1-7 is high

As directed in chapter 2 multiple processors operating in

voltage and TB1-8 is ground.

a single building must be synchronized together. Slave

(3) At each slave perform the following test:

processors (para. 2-19 and FO-1A) shall be modified

(a)

Place the leads of a

and tested as follows.

Electrical parts for the

voltohmmeter (VOM) across terminals TB2-1 and TB2-

modification, a length of insulated wire, No. 22 AWG or

2. TB2-1 is signal voltage and TB2-2 is signal ground.

smaller diameter, and a .01 microfarad 50V capacitor,

(b)

The VOM should indicate

are not provided and must be supplied locally.

approximately 12V RMS (root mean square).

a. Modification.

(1) Remove the processor pc board.

with the handle of a screwdriver and verify that the

(2) Cut a 4 inch length of insulated wire,

signal does not waver or momentarily drop out. Waver

No. 22 AWG or smaller diameter.

or dropout indicates a loose synchronization connection

(3) Strip inch of insulation from each end

or a cold solder joint on the board modification.

of the wire.

(4) Tin the ends of the wire.

Reason: Complete the instructions for synchronization

(5) On the underside of the pc board solder

begun in chapter 2.

one end of the wire to the junction of CR1, C5, and Q2

(fig. 7-2).

Change 2 7-7