Anritsu 373XXA - Manual (Page 75)

If it fails, contact ANRITSU Customer Service Center.
Step 3. If the problem only occurs in Band 3, replace the Switched
Doubler Module assembly and repeat test.
If it fails, replace Switched filter and repeat test.
If it fails, contact ANRITSU Customer Service Center.
Step 4. If the problem only occurs in Band 2, replace Switched Fil-
ter assembly and repeat test.
If it fails, contact ANRITSU Customer Service Center.
NOTE
After replacing a component, perform a Frequency Cali-
bration and a RF power/ALC Calibration. Refer to Chap-
ter 6, Adjustments.
Check #3 If you have determined that failure occurs in both sweep directions, at
all frequencies and Error Code 5110 is recorded in the Service Log, the
failed component could be any of the following assemblies:
1. Transfer Switch
2. Switched Doubler Module
3. YIG Oscillator
4. A21A1 YIG Bias PCB
5. A21A2 Source Control PCB
Replace the components listed above in sequence. After each replace-
ment recalibrate unit (see note above) and retest. If 373XXA still fails,
contact your nearest ANRITSU Customer Service Center.
5-8
PERIPHERALS/
INTERFACE The following paragraphs contain procedures to be used for troubleshoot-
ing 373XXA peripheral or interface test failures. Select the paragraph
subheading that corresponds to the test that failed.
CRT Display Test
Failures:
If the CRT Display Test failed, troubleshoot as follows:
Step 1. Replace the CRT Monitor Assembly.
Step 2. Perform the CRT Monitor Test again; if fail, replace the
A15, Graphics Processor PCB.
TROUBLESHOOTING PERIPHERALS/ INTERFACE
373XXA MM 5-21