Agilent Technologies 4352B, Service Manual

Page: 139 / 293

Check Error Messages
Turn the analyzer power on. Check that no error message appears on the LCD .
If no error message is displayed, continue with the Check A1 DRAM and Flash Memory in
this ST ART HERE section.
If one of error messages listed below is displayed, follow the instruction described below . F or
any other message , see the Error Messages in the Messages Chapter .
Error Messages Instruction
EEPROM CHECK SUM ERROR This indicates that the correction constants stored in the
EEPROM on the A1 CPU are invalid or the EEPROM is
faulty . Rewrite all correction constants into the EEPROM
using the adjustment program. F or the detailed procedure ,
see the A djustments and Correction Constants chapter in
this manual. If the rewriting is not successfully performed,
replace the EEPROM and then rewrite the correction
constants into the new EEPROM.
Svc (Status Annotation) This indicates that the correction constants stored in the
EEPROM on the A1 CPU are invalid or the EEPROM is faulty .
See the instructions in the EEPROM CHECK SUM ERROR message ,
above .
CPU DRAM R/W ERROR This indicates that the A1 DRAM Read/Write test failed on
the power-on self test sequence . Replace the A1 CPU .
DUAL PORT SRAM R/W ERROR This indicates that the power-on self test for DSP's dual port
SRAM on the A1 CPU failed. Replace the A1 CPU .
Note
CAUTION: Insufficient RF Level is displayed when turning with the analyzer
power on. This is caused by no RF signal input on RF IN connector of the
4352B. After the signal is input to the RF IN connector , this message will
disappear .
2. Check the A1 CPU
a. Turn the analyzer power on.
b.
Press 4
System
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU ,
NNNNNNNNNNNNNNNNN
TESTS , 4
1
5 , 4
x1
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST to run the internal test 1: A1
CPU .
If no error message is displayed, the A1 CPU is probably good. Continue with the next
step , Check the A1 DRAM and Flask Memory .
If one of the error messages listed below is displayed, the A1 CPU is faulty . Replace the
A1 CPU .
FLASH MEMORY CHECK SUM ERROR
EEPROM CHECK SUM ERROR
F-BUS TIMER CHIP TEST FAILED
KEY CHIP TEST FAILED
GPIB CHIP TEST FAILED
RTC CHIP TEST FAILED
mini-DIN CHIP TEST FAILED
DSP CHIP TEST FAILED
BACKUP SRAM CHECK SUM ERROR
FDC CHIP TEST FAILED
6-6 Digital Control T roubleshooting