SERVICE SUPPORT | GENERAL INFORMATION |
more than 30 pages of service messages and data. The 373XXA will automatically remove the oldest errors first to make room for new er- rors, if necessary. To check the contents of the service log, use the pro- cedure described in Chapter 3, Operational Tests.
| NOTE |
| A printed or disk file copy of the Service Log (with the fail- |
| ure in question) must be made available to ANRITSU |
| when exchanging a failed assembly, or when requesting |
| service support. Refer to Chapter 2, Replaceable Parts, for |
| further information. |
System | Quick operational checkout of the system may be accomplished by the |
Test/Certification | system user or for incoming inspection purposes using the “Operational |
| Checkout” chapter in the 373XXA Operations Manual. Those procedures |
| are useful in quickly verifying that the instrument’s primary measure- |
| ment functions are operational and stable. |
| Full operational testing of the system is detailed in Chapter 3, Opera- |
| tional Tests. These tests should be performed annually, or more often |
| depending on system use. |
| Verification of the system’s measurement accuracy and other key per- |
| formance parameters may be done using the procedures in Chapter 4, |
| Performance Verification. This should be performed annually, or more |
| often depending on system use. |
Preventive Service | The 373XXA A9 Processor PCB contains a battery backed memory/real |
| time clock chip (BBRAM) and a static memory (SRAM) backup battery. |
| These have a finite life span and should be replaced periodically per the |
| procedures in Chapter 8, Removal and Replacement Procedures. |
| The BBRAM chip has a rated life span of 4 years. The SRAM backup |
| battery has a worst case elapsed time for SRAM battery protection of |
| 200 days. The SRAM battery life span will vary according to how the |
| system is used; that is, how often the system is powered off for ex- |
| tended periods of time. |
Servicing Specially | Instruments with customer requested special modifications performed by |
Modified Instruments | ANRITSU will have an identifying Specials Modification number printed |
| on the rear panel. This number will be preceded with the letters SM, i.e., |
| SM1234 is special modification number 1234. |
| Special instruments may have service requirements different from |
| those specified in this manual. Contact your local Service Center if you |
| need more information when servicing such instruments. |
| The following paragraphs briefly describe the various service support |
| services and aids available to you to help you maintain your 373XXA. |
373XXA MM |
