Tektronix 576 Instruction Manual page 4

Adjustment—T ype 576
TABLE 1-1
ADJUSTMENT PROCEDURE RECORD AND INDEX
Step Title Adjust Required Page
No. Previous
Steps
1 Adjust —75 Volt Supply R721 1-3
2 Check Other Power Supply
1-4
Voltages
3 Check Power Supply Regulation 1-4
4 Adjust CRT Controls R891, R897, R685, R893 1 1-5
5 Adjust Balance of Horizontal R681, R650, R645 1,4 1-7
Display Amplifier
6 Adjust Balance of Vertical R581, R550, R545 1,4
. _ 1-8
7. Adjust Horizontal and R692, R592 1,4,5,6 1-8
Vertical CRT Gain :
8 Adjust Horizontal and R673, R573 1,4,5,6,7 1-8
Vertical Magnifier Gains
9 Adjust Horizontal Display R636, R638, R641 1,4,5,6,7,8
Amplifier Gains 1-9
10 Adjust Vertical Display R536, R538, R541 1,4,5,5,7,8
Amplifier Gains 1-9
11 Adjust Horizontal C433 1
Cc . 1-10
ompensation
12 Adjust Zero Crossing and R8, R24 1
1-12
Step Delay
13 Adjust Zero Step Level R224, R97, R127 1,12 1-12
14 Adjust Step Amplifier Gain R113, R86, R85 1,12,13 1-13
15 Adjust Current Balance R243 1,12, 13, 14 1-13
16 Adjust Looping Compensation C301, C339, C341, 1 1-14
LOOPING COMPENSATION
Preliminary Adjustment Procedure
warmup at an ambient temperature of +25°C +5°C (+77°F
+9°F) before making any checks or adjustments.
1. Remove the side panels and the Standard Test Fix-
ture from the Type 576.
2. Set the Line Voltage Selector assembly and the 60
6. Set the instrument controls as shown in the list of
Initial Control Settings at the beginning of the procedure
Hz-50 Hz switch on the Type 576 rear panel in accordance
with the line voltage source to be used.
3. Connect the autotransformer and other test instru-
Initial Control Settings
ments to a suitable power source. Connect the Type 576 to
the autotransformer output.
GRATICULE ILLUM
READOUT ILLUM
4. Set the autotransformer for the line voltage and range INTENSITY
chosen on the Type 576 Line Voltage Selector assembly. FOCUS
VERTICAL
5. Turn on the autotransformer, Type 576, DC volt- Selector
meter and test oscilloscope. Allow at least 5 minutes CENTERLINE VALUE
1-2
and start the procedure with step 1.
Type 576
Graticule Lines
Readout Visible
Fully Counterclockwise
Centered
5