Agilent Technologies 8711C Service Manual page 13

How to Remove the Power Supply Assembly . . . . . . . . . . . . . . . .
A7 Display Assembly Replacement . . . . . . . . . . . . . . . . . . . . . .
How to Remove the Display Assembly
How to replace the power switch or brightness control . . . . . . . . . . .
How to Adjust the Position of the CR
A8 3.5" Internal Disk Drive Assembly Replacement . . . . . . . . . . . . . .
How to Remove the 3.5" Disk Drive Assembly . . . . . . . . . . . . . . . .
Attenuator Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .
AM Delay Modulator Replacement . . . . . . . . . . . . . . . . . . . . . .
Post Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Order Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Save Money by Ordering R-E (Rebuilt-Exchange) Assemblies . . . . . . . . .
Save ime by Calling (800) 227-8164 . . . . . . . . . . . . . . . . . . . .
4. Troubleshooting and Block Diagrams
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use the Extender Board . . . . . . . . . . . . . . . . . . . . .
Initial Observations - Normal Power-up Sequence . . . . . . . . . . . . . .
Operator's Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Category 1 Failures - Dead or No Response, No Display, Unreadable Display, or
Error Messages on the Display . . . . . . . . . . . . . . . . . . . . . . .
roubleshooting A6 Power Supply Assembly Problems . . . . . . . . . . . .
Check the Rear Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . .
Measure the Power Supply Voltages . . . . . . . . . . . . . . . . . . . .
Remove Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . .
roubleshooting Digital Group Problems . . . . . . . . . . . . . . . . . . .
Error During Power-up . . . . . . . . . . . . . . . . . . . . . . . . . .
est Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
est Status LEDs code . . . . . . . . . . . . . . . . . . . . . . . . .
Error Occurs During DSP Initialization or Calculating Coecients . . . . . . .
Clear the Nonvolatile SRAM . . . . . . . . . . . . . . . . . . . . . . .
Measure the 5 MHz Reference Signal . . . . . . . . . . . . . . . . . . .
Front Panel Problems . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Power-Up Problems . . . . . . . . . . . . . . . . . . . . . . . . .
Other Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . .
Category 2 Failures - No Error Message, but Nonfunctional Measurement . . . .
roubleshooting the A3 Fractional-N/Reference Assembly . . . . . . . . . .
Check the Output Power . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Lock Problems
Detailed Fractional-N/Reference roubleshooting . . . . . . . . . . . . .
roubleshooting the A4 Source Assembly . . . . . . . . . . . . . . . . . .
roubleshooting the A5 Receiver Assembly . . . . . . . . . . . . . . . . .
A5 Receiver Assembly Diode Replacement
6
race at
Detailed Receiver roubleshooting . . . . . . . . . . . . . . . . . . . .
Category 3 Failures - Inaccurate (but reasonably functional) Measurements . . .
roubleshooting Spurious Responses and Inaccurate Data . . . . . . . . . .
Spurious Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spurs in the Data race . . . . . . . . . . . . . . . . . . . . . . . . .
Inaccurate Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver Power Problems
Category 4 Failures: Peripheral Device Problems . . . . . . . . . . . . . . . .
DIN Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents-4
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200 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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