Technical data

ManualsBrandsAgilent Technologies ManualsMultimeter83624A

What's Wrong?

1. Do you have any self test failures, running error

messages (beeping) or raw channel power

(unratioed power) problems? = MAGIC QUESTION.

2. Failed performance tests?

3. Display or Front Panel abnormalities, measurement

errors, or display hang-ups?

4. Low or no power symptoms?

No Obvious Failure Type

The best approach to repair the 8510XF at this point

is to verify that the 85101C is good. Once it is known

to be good, it will act as your diagnostic controller.

Remove the external controller, printer, etc. and the cables

from the 8510XF system.

Run the 8510XF Service Program to verify that the

8510XF is OK to a 95% confidence level. To do this,

run all the service program tests in the "85101C

Display/Processor Service Program menu (#1)."

These tests take about ten minutes. Refer to the

8510XF Service Program Flowchart. See partial

flowchart on next page.

NOTE: the above tests can be skipped if the 85101C

passes the power up 85101 self test. The self test

has only a 70% confidence level, so use it accordingly.

Do a Pre-Operational Check of the

8510XF System

Check Front and Rear Panel control settings, cables and

GPIB addresses. Check the 85101 free run switch

on the A5 Processor Board (all zeros), and proper firm-

ware revisions for source and 8510XF (you may need

to reload the Operating System in an extreme case).

Check that the 8510XF firmware is XF.01.00 or greater.

First, turn on the Sources, then the Test Set, then the

8510XF, or the system cabinet power switch. Then

check all troubleshooting LED's. See the 8510XF

system level troubleshooting block diagram for these

LED's. See installation for additional information in

performing the Preflight Checkout.

Read the 8510XF Calibration and Verification and

Cable manuals on how to inspect, gage, clean, and

use the calibration and verification devices, waveguide,

and test port return cables. Make sure, if your 85059A

Verification Kit has been certified to 110 GHz within the

past year.

Obvious Calibration or Verification Problem

Try the backup standard software by reloading the

Operating System firmware.

It might be a known software bug. See STARS bug report.

Call the factory with details for checkout and duplication

of unknown and new bugs!

Obvious Software Problem

CHECK POWER SUPPLIES

Check all main (110V/220V) fuses and power switches.

Remove 85101, 85102 and E7342A/52A instrument

covers and check LED power and service indicator lights.

Recheck by measuring each power supply voltage with a

DVM.

The 85102 power switch LED is supplied by the +5V

supply in the 85101.

Obvious Power Supply Problem

Obvious Self-Test, running error, or unratioed power test

failure. Refer to the 8510XF Service Manual, part

number E7350-90001, Service and Troubleshooting.

Refer to Qualified

Personnel Only!

83621A/B

LO Source

45 MHz to 20 GHz

83651A/B

RF Source

45 MHz to 50 GHz

PREAMP

SLOPE AMP

50-75 GHz

2-50 GHz

(Incident)

a1, a2

(Reflected or

Transmitted)

test b1, b2

Test Port

( 1 of 2)

<50 GHz

<2 GHz

Microwave Subassembly Millimeter Wave Subassembly

8-18 dB

75-110 GHz

45 MHz - 110 GHz

75-110 GHz

Combiner

Splitter

Combiner

Splitter

45 MHz to

2 GHz

IF, 75-110 GHz

Band

Option 005

50 GHz-

110 GHz

45 MHz-

50 GHz

IF, 75-110 GHz

Band

IF, 50-75 GHz

Band

IF, 50-75 GHz

Band

IF, 2-50 GHz

Band

IF, 2-50 GHz

Band

IF, 45 MHz-2 GHz

Band

Option 005

IF, 45 MHz-2 GHz

Band

Option 005

Reference IFsTest IFs

Test Head ( 1 of 2 )

Millimeter

Wave

Controller

Obvious Failure Type

Simplified Signal Path of Unratioed Power Level Tests

If NO Obvious Failure Type

Prove 85101 is OK

E7340

flowcht1.cdr

Rev. 2 4/22/98

8510XF System Service Flow Diagram (Sheet 1of 2)

To Sheet 2

EPROM ID on the

GPIB Board A12

5-17/5-18