Power Supply and Bite Voltages. (Not Modified Circuit).

TB 55-4920-428-35

(21) Set TI BITE switch to -12 v position. Digital multimeter will indicate between -11.5 and

-12.5 vdc. If not, perform b(4) below as shown in figure 2.

(22) TI DVM will indicate between -11.50 and -12.50.

(23) Set TI POWER to OFF.

(24) Disconnect digital multimeter lead from TI terminal board TB 4-12 (HI) and reconnect to TB

4-11 (HI).

(25) Set TI BITE switch to + 12 v position.

(26) Set TI POWER to ON.

(27) Digital multimeter will indicate between 11.5 and 12.5 vdc. If not, perform b(5) below as

(28) TI DVM will indicate between 11.50 and 12.50.

(29) Set TI POWER to OFF.

(30) Disconnect digital multimeter lead from TI terminal board TB 4-11 (HI) and reconnect to TB

4-6 (HI).

(31) Set TI BITE switch to 5 v position.

(32) Set TI POWER to ON.

(33) Digital multimeter will indicate between 4.7 and 5.3 vdc. Observe indication on TI DVM

between 4.70 and 5.30.

(34) Set TI POWER to OFF.

(35) Disconnect digital multimeter leads (B6) from TI terminal board TB 4-6(HI) and TB 4-

5 (LOW) and reconnect to EXTERNAL METER jacks, using leads (B7) and (B8).

(36) Connect Electronic Counter (A3) leads (B3) to the digital multimeter leads.

(37) Set digital multimeter RANGE switches to 20 vac.

(38) Position TI controls (a) thru (c) as follows:

(a) EXTERNAL METER SELECT to REF and SYSTEM SELECT to BITE.

(b) BITE to 13 RMS.

(39) Digital multimeter will indicate between 12.5 and 13.5 vac. Electronic Counter will indicate

between 395 and 405 Hz. If not, perform b(6) below as shown in figure 2.

(40) TI DVM will indicate between 12.50 and 13.50.