Power Supply and Bite Voltages (Modified Test Set Circuit).

TB 55-4920-428-35

(5) Digital multimeter will indicate between 27.5 and 28.5 vdc. If not, perform b(1) below as shown

(6) Set TI POWER to OFF.

(7) Disconnect digital multimeter lead from TI terminal board TB 4-10 (HI) and reconnect to TB 4-

8 (HI).

(8) Set TI POWER to ON.

(9) Digital multimeter will indicate between -19.25 and -19.75 vdc. Record reading.

(10) Position TI controls as listed from (a) and (b) below:

(a) SYSTEM SELECT to BITE.

(b) BITE to -20 v position.

(11) TI DVM will indicate the reading within ±0.2% plus 10 counts maximum meter fluctuation of

the digital multimeter reading recorded in step (9) above. If not, perform b(2) and (3) below.

(12) Set TI POWER to OFF.

(13)

Disconnect digital multimeter lead from TI terminal board TB 4-8 (HI) and reconnect to TB 4-

9 (HI).

(14) Set TI BITE to +20 v position.

(15) Set TI POWER to ON.

(16) Digital multimeter will indicate between 19.25 and 19.75 vdc. Observe indication on TI DVM

between 19.25 and 19.75.

(17) Set TI POWER to OFF.

Disconnect digital multimeter lead from TI terminal board TB 4-9 (HI) and reconnect to TB4-

(18)

12 (HI).

(19) Set TI POWER to ON.

(20) Set TI BITE switch to -12 v position.

(21)

Digital multimeter will indicate between -11.88 and -12.12 vdc. Record reading.

(22) TI DVM will indicate the reading within ±0.2% plus maximum meter fluctuation of digital

multimeter reading recorded in step (21). If not, perform b(4) below.

(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 +12v position.