TB 9-6625-2024-35
b. Adjustments
(1) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton
for an err display of 0.0%.
(2) Adjust C562 and C587 (C588 for Tektronix 7603 S/N above B030000, C568 and
C588 for S/N below B030000, while maintaining approximately equal capacitances) (fig.
(3) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton
for an err display of 0.0%.
(4) Adjust C566 and C586 (fig. 1) for S/N above B030000 for one marker per 2
divisions. Readjust C568 and C588 for S/N below B030000 for best in-tolerance
compromise while setting TIME/DIV OR DLY TIME switches between .05 and .1 s
(R).
13. Power Supply
NOTE
Remove all plug-ins during power supply checks.
NOTE
Do not perform power supply check if all other parameters
are in tolerance.
a. Performance Check
(1) Connect digital multimeter between TP -50V test point (fig. 1) and chassis
ground. If multimeter does not indicate between -49.9 and -50.1 V dc, perform b below.
(2) Repeat technique of (1) above for test points and indications listed in table 4.
Digital multimeter will indicate within limits specified.
Test instrument
Digital multimeter indications
test points
(V Dc)
(fig. 1) (V)
Min
Max
-15
-14.7
-15.3
+5
+4.85
+5.15
+15
+14.7
+15.3
+50
+49.4
+50.6
+130
+124.8
+135.2
-29601
-2871
-3049
1Use
high-voltage probe supplied with dc voltmeter.
50 V dc (R).
14. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
