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2. Service
Assembly/Module Diagnostic Trees (Diagnostic Section 3)
114
3.7.2.1 Electron Multiplier High-Voltage Supply Test
1
Remove instrument power, and wait one minute for the A16 module voltages
to bleed down.
2
Re-connect the Ion Pump high-voltage supply cable to A17.
3
Disconnect the left-hand high-voltage lead and reconnect it to the tip of the
high-voltage probe using a short piece of insulated wire between the inside of
the high-voltage lead connector and the
high-voltage probe.
4
Ground the high voltage probe return to the 5071A chassis, and plug the
probe output into the DMM. Set voltage mode and at least 10.0 Volts range.
The input impedance of the DMM must equal that specified for the high-
voltage probe.
5
Apply instrument power, wait for the instrument to begin warming up, and
observe the voltage displayed by the DMM. Multiply this voltage by the
voltage-division ratio of the probe and record results.
6
Observe the voltage displayed on the LCD using the
INFO/EMULT
menu
selection. Note that the LCD does not display the sign of the voltage.
QUESTION:
Do the voltage readings agree to within 5%?
If Yes:
The A16 High-Voltage Supply Module is functional. Remove
the extender, replace A2. Re-connect A19 to A1 at A1J11, and
reconnect the semi-rigid cable from the SMA connector on A19
to A9J5. Continue testing.
If No:
Go to, 3.7.2.2.
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: ......