Adjustment Procedure—2215A Service
INDEX TO ADJUSTMENT PROCEDURE
STEPS
Power Supply and CRT Display Page
1. Check/Adjust Power Supply DC Levels
.............
5-4
2. Check High-Voltage Supply
..................................
5-5
3. Adjust CRT Grid Bias
..........................................
5-5
4. Adjust Astigmatism
..............................................
5-5
5. Adjust Trace Alignment
........................................
5-5
6. Adjust Geometry ................................................... 5-5
Vertical
1. Adjust Attenuator Step Balance .......................... 5-6
2. Adjust 2/5 mV DC Balance
..................................
5-6
3. Adjust Channel 1 Variable Balance...................... 5-7
4. Adjust Channel 2 Invert Balance.......................... 5-7
5. Adjust MF/LF Compensation and Gain Balance . 5-7
6. Adjust Vertical Gain
..............................................
5-8
7. Check Deflection Accuracy and Variable Range . 5-8
8. Check Input Coupling ........................................... 5-8
9. Adjust Attenuator Compensation ........................ 5-9
10. Check Alternation Operation
................................
5-10
11. Check Chop Operation ......................................... 5-10
12. Adjust High-Frequency Compensation and
Delay Line Compensation .................................... 5-10
13. Check Bandwidth Limit Operation
....................
5-11
14. Check Bandwidth
...............................................
5-11
15. Check Channel Isolation ..................................... 5-11
16. Check Common-Mode Rejection R atio
...............
5-12
17. Check Input Gate Current................................... 5-12
Horizontal Page
1. Adjust Horizontal Amplifier Gain
.........................
5-13
2. Adjust X I0 Horizontal Amplifier Gain
.................
5-14
3. Adjust Magnifier Registration
.............................
5-14
4. Check Position Range
.........................................
5-14
5. Check Variable Range
.........................................
5-14
6. Adjust Delay Dial Timing
.....................................
5-14
7. Adjust High-Speed Tim ing
...................................
5-15
8. Adjust 5-ns Timing and Linearity
.........................
5-15
9. Check Timing Accuracy and Linearity................. 5-15
10. Check Delay Time Dial Range and Accuracy . .. 5-16
11. Check Delay J itte r................................................ 5-17
12. Adjust X Gain ...................................................... 5-18
13. Check X Bandwidth
.............................................
5-18
14. Check A-Sweep Holdoff
.....................................
5-18
Trigger
1. Adjust Trigger Offset
...........................................
5-19
2. Adjust Trigger Sensitivity
.....................................
5-19
3. Adjust Slope Balance
.........................................
5-20
4. Adjust P-P Auto Trigger Centering
.....................
5-20
5. Check Internal Triggering
...................................
5-20
6. Check External Triggering
...................................
5-21
7. Check External Trigger Ranges
.........................
5-21
8. Check Single Sweep Operation
.........................
5-22
External Z-Axis and Probe Adjust
1. Check External Z-Axis Operation
.......................
5-23
2. Check Probe Adjust Operation
...........................
5-23
5-3