TB 9-6625-143-24
(24) Press TI Trigger Edge key, then [Ext] key.
(25) Adjust TI Trigger Level for a stable display. If TI does not display a stable
display, perform b below.
(26) Set oscilloscope calibrator for a LEVEL SINE, 25 MHz, 150 mV p-p output.
(27) Adjust TI Trigger Level for a stable display. If TI does not display a stable
display, perform b below.
(28) Set all outputs to minimum and disconnect equipment setup.
b. Adjustments. Complete all performance checks through paragraph 12 for as found
data, then perform paragraph 13.
13. Adjustment
a. Disconnect TI from power source and remove TI protective covers.
b. Connect TI to power source, turn TI on and allow 1 hour warm-up.
c. Connect multimeter low terminal to TI chassis ground.
d. Test supply voltages and, if necessary, make adjustments to achieve result as shown
in table 5 below.
Table 5. Power Supply Voltages
Test point
Adjustment
Result
1
E204 +5.1 V
R76 (R)
4.85 V to 5.35 V
E207 -5.2 V1
R76 (R)
-5.04 V to -5.36 V
E205 +3.3 V
R85 (R)
3.20 V to 3.40 V
2
E208 +15.75 V
---------
14.963 V to 17.010 V
Adjust for best compromise.
1
Not adjustable. Dependent upon +5.1 V supply.
2
e. Disconnect all input signals from TI.
f. Set CALIBRATION switch (rear panel) to UNPROTECTED.
g. Press TI Utility key.
h. Press TI [Service] key.
i. Press TI [User Cal] key.
j. Upon completion of user cal, set CALIBRATION switch (rear panel) to
PROTECTED.
k. Perform paragraphs 8 through 12 above for as left data, then perform paragraph 14
below.