Tektronix 2213 Instruction Manual

Adjustment Procedure—2213 Service
Specific interactions are also called out within certain
adjustment steps to indicate that adjustments must be
repeated until no further improvement is noted.
PREPARATION FOR ADJUSTMENT
It is necessary to remove the instrument cabinet to
perform the Adjustment Procedure. See the "Cabinet"
removal instructions located in the "Maintenance" section
of the manual.
Before performing this procedure, do not preset any
internal controls and do not change the —8.6-V Power-
Supply adjustment, since that will typically necessitate a
complete readjustment of the instrument, when only a
partial readjustment might otherwise be required. To avoid
unnecessary readjustment, only change an internal control
setting whenever a Performance Characteristic cannot be
met with the original setting. If it is necessary to change
the setting of any internal control, always check Table 5-1
for possible interacting adjustments that might be required.
All test equipment items described in Table 4-1 are
required to accomplish a complete Adjustment Procedure.
At the beginning of each subsection there is an equipment-
required list showing only the test equipment necessary
for performing the steps in that subsection. In this list,
the item number following each piece of equipment cor
responds to the item number listed in Table 4-1.
Make initial control settings as listed at the beginning
of each subsection. Then connect the test equipment to
an appropriate ac-power-input source and connect the 2213
to a variable autotransformer (Item 10 in Table 4-1) that is
set for 115 V ac. Apply power and allow a 20-minute
warm-up period before commencing any adjustments.
The most accurate display adjustments are made with a
stable, well-focused, low-intensity display. Unless otherwise
noted, adjust the AUTO INTENSITY, AUTO FOCUS, and
TRIGGER LEVEL controls as needed to view the display.
Wherever possible in this procedure, instrument per
formance is first checked before an adjustment is made.
Steps containing both checks and adjustments are titled
"Check/Adjust." Those steps with only checks are titled
"Check."
INDEX TO ADJUSTMENT PROCEDURE
Power Supply and CRT Display Page
1. Check/Adjust Power Supply DC Levels
and Ripple.....................................................................5-4
2. Check High-Voltage Supply ......................................... 5-5
3. Adjust CRT Grid Bias ................................................... 5-5
4. Adjust Astigmatism and Auto Focus Tracking. . . . 5-5
5. Check/Adjust Trace Alignm ent ................................. 5-5
6. Adjust Geometry...........................................................5-6
Vertical
1. Adjust Vertical G a in ................................................... 5-7
2. Adjust Attenuator Step Balance ................................. 5-8
3. Adjust Attenuator X I0 Balance ................................. 5-8
4. Check Deflection Accuracy and Variable Range . . 5-8
5. Check Input C oupling.................................................5-9
6. Check ALT and CHOP Operation...............................5-9
7. Check VOLTS/DIV Variable Control
Trace Shift.....................................................................5-9
8. Adjust Invert Balance ................................................... 5-9
9. Adjust Trigger Balance.................................................5-9
10. Adjust Attenuator Compensation.............................5-10
11. Adjust Vertical Output Amplifier Compensation. .5-10
12. Adjust Channel Matching and Check Bandwidth . .5-11
13. Check Common-Mode Rejection R a tio...................5-11
14. Check Channel Isolation............................................5-12
15. Check POSITION Control Range.............................5-12
Horizontal
1. Adjust Horizontal Amplifier Gain.............................5-13
2. Adjust Magnifier Registration..................................5-13
3. Adjust 5-ms T im ing ................................................... 5-14
4. Adjust High-Speed Timing ......................................... 5-14
5. Check Timing Accuracy............................................5-14
6. Check SEC/DIV Variable Range ............................... 5-15
7. Check Delay Time Range ......................................... 5-15
8. Check Delay Time Jitter............................................5-15
9. Check POSITION Control Range.............................5-16
10. Adjust X-Gain..............................................................5-16
11. Check X-Bandwidth....................................................5-16
Triggering
1. Adjust Trigger Slope Balance .................................... 5-17
2. Check/Adjust Auto Trigger Centering and
TRIG'D LED Operation............................................5-17
3. Check Internal Triggering ......................................... 5-18
4. Check External Triggering ......................................... 5-18
External Z-Axis and Probe Adjust
1. Check EXT Z-AXIS Operation..................................5-20
2. Check PROBE ADJUST Operation .......................... 5-20
@
5-3

Tektronix 2213 Specifications

General

Brand	Tektronix
Model	2213
Category	Test Equipment
Language	English