TB 9-6695-298-35
(3) Measure the +15 V power supply with the digital multimeter by connecting
the + (positive) lead to the +OUT terminal and the -(negative) lead to the COM terminal
on POWER SUPPLY BOARD NO. 1 (fig. 4).
(4) Digital multimeter will indicate between +14.95 and +15.05 V dc; if not,
perform b(2) below.
(5) Measure the -15 V power supply with the digital multimeter by connecting
the + (positive) lead to the -OUT terminal and the -(negative) lead to the COM terminal
on POWER SUPPLY BOARD NO. 1 (fig. 4)
(6) Digital multimeter will indicate between -14.95 and -15.05 V dc; if not,
perform b(3) below.
(7) Measure the +18 V power supply with the digital multimeter by connecting
the + (positive) lead to pin 1 and the - (negative) lead to pin 2 of J3 (fig. 1) on the Al
board.
(8) Digital multimeter will indicate between +17.90 and +18.10 V dc; if not,
perform b(4) below.
(9) Measure the excitation voltage with the digital multimeter by connecting the
+ (positive) lead to the left side of R2 when facing the front of TI and the - (negative) lead
to the -(negative) side of C80 (fig. 1) on the A1 board.
(10) Digital multimeter will indicate approximately +15.0000 V dc. Record this
voltage to 4 decimal places.
(11) Multiply the voltage in (10) above by 1.7 then divide the results by 15. The
resulting voltage should be approximately 1.70000 V dc. Record this voltage to 5 decimal
places.
(12) Measure the 15-bit A/D converter reference voltage with the digital
multimeter by connecting the + (positive) lead to the front end of R19 (fig. 1) and the -
(negative) lead to the AGND (fig. 1) on the Al board. Record this voltage to 5 decimal
places.
(13) The voltage measured in (12) above should be equal to the voltage calculated
in (11) above; if not, perform b(5) below and record the final voltage to 5 decimal places.
(14) Set the MODE switch to select the DYNAMIC mode.
(15) Measure the excitation voltage with the digital multimeter by connecting the
+ (positive) lead to the left side of R2 (fig. 1) when facing the front of the TI and the -
(negative) lead to the - (negative) side of C80 (fig. 1) on the A1 board.
(16) Digital multimeter will indicate approximately +15.0000 V dc. Record this
voltage to 4 decimal places.
(17) Multiply the voltage measured in (16) above by 10 then divide the results by
15. The resulting voltage should be approximately 10.0000 V dc. Record this voltage to 4
decimal places.
(18) Measure the 11 bit A/D converter reference voltage by connecting the digital
multimeter + (positive) lead to pin 6 of U7 (fig. 1) and the - (negative) lead to the -
(negative) side of C80 (fig. 1). Record this voltage to 4 decimal places.
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