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2. Service
Assembly/Module Diagnostic Trees (Diagnostic Section 3)
123
3.9.1.4.1. EFC Voltage Test (2)
1
Unplug the A19 oscillator from A1-J11 and repeat the measurement
procedure described in 3.9.1.3.
QUESTION:
Do the measured and calculated EFC voltages agree to
within
0.03
volts?
If Yes:
Remove power, replace A19, and retest.
If No:
Remove power, replace A6, and retest.
3.9.1.5 A19 Oven Warm-up Time Test
1
Power-cycle the instrument.
2
Wait 10 minutes.
3
Observe the value of the A19 (VCXO) oven monitor using the
INFO/Ovens
menu.
4
Verify that the voltage is now be between -10.0 and -5.0 volts, indicating that
the oscillator oven has warmed up.
QUESTION:
Does the A19 oven warm up in 10 minutes or less?
If Yes:
Go to, 3.9.1.6.
If No:
Remove power, replace A19, and retest.
3.9.1.6 A19 Signal-Amplitude Test
1
Disconnect the semi-rigid cable from A9J5.
2
Use the adapter cable to connect it to the input of the oscilloscope with a 50
Ω
terminator.
3
Verify that the amplitude of the signal, is greater than 1.0 Vp-p.
QUESTION:
Is the signal amplitude greater than 1.0 Vp-p.
If Yes:
Go to, 3.9.1.7.
If No:
Remove power, replace A19, and retest.
Содержание 5071A
Страница 2: ......
Страница 40: ...1 Performance Tests Verifying Specifications 5071A Complete Performance Tests 24 ...
Страница 48: ...2 Service Pre Troubleshooting Information 32 Figure 2 1 Instrument Top View ...
Страница 147: ...3 Theory of Operation Functional Block Descriptions 131 Figure 3 2 5071A Overall Block Diagram ...
Страница 148: ...3 Theory of Operation Functional Block Descriptions 132 Figure 3 2 5071A Overall Block Diagram Continued ...
Страница 164: ...3 Theory of Operation Functional Block Descriptions 148 Figure 3 3 A1 Power Supply Distribution Schematic Diagram ...
Страница 166: ...3 Theory of Operation Functional Block Descriptions 150 Figure 3 4 A1 Slot Module Interconnect Diagram ...
Страница 168: ...3 Theory of Operation Functional Block Descriptions 152 Figure 3 5 Power Supply Block Diagram ...
Страница 171: ...3 Theory of Operation Functional Block Descriptions 155 Figure 3 7 Opt 048 A1 Slot Module Interconnect Diagram ...
Страница 172: ...3 Theory of Operation Functional Block Descriptions 156 Figure 3 8 Opt 048 Power Supply Block Diagram ...
Страница 173: ......
Страница 175: ...3 Theory of Operation Functional Block Descriptions 159 Figure 3 9 A1 Component Locator Diagram ...
Страница 194: ...5 Replaceable Parts How To Order A Part 178 ...
Страница 197: ......