Filter
Top Products
Step 4. Retry boot-up. If fail, replace the Floppy Disk Drive.
Screen Display
Problems
If the 373XXA system appears to have no screen display, perform the
preliminary check below and then perform checks1-3,asappropriate:
Preliminary Check - Press the 373XXA Power key off and then on sev
-
eral times. Each time power is reapplied, pause and wait for the
373XXA software system to boot-up. During boot-up, observe the top
left hand portion of the CRT display.
NOTE
An alternative method to reset and re-boot the software
system is to press the red button on the A9 Main Processor
PCB. Observe the messages displayed on the screen dur
-
ing the boot-up process. Verify that the following messages
are present :
n Initializing front panel knob (A14/A20)....
n Initializing GPIB (A13/A18)....
n Initializing external keyboard (A13)....
n Initializing external trigger (A13/A5)....
Check 1: If during boot-up the 373XXA does not attempt to display any mes-
sages at all, proceed as follows:
Step 1. Replace the A15 Graphics Processor PCB.
Step 2. Retry boot-up. If fail, replace the Internal VGA Monitor.
Step 3. Retry boot-up. If fail, replace the A9, Main Processor PCB.
Step 4. Retry boot-up. If fail, contact ANRITSU Customer Service
Center.
Check 2: If the system halts before it completes all five digital sections, process
as follows:
Step 1. Replace the PCB indicated on the last displayed message.
Example: If the system halt at the “Initializing front panel
knob (A14/A20)....,” replace the A14 and A20 PCBs.
Step 2. Retry to boot the system. If it still fails, contact ANRITSU
Customer Service.
5-6 SYSTEM HAS ERROR
CODE
If the 373XXA detects a problem during normal operation, an error mes
-
sage consisting of an error code followed by a brief error message will be
displayed on the screen. The error code will also be written to the service
log along with some of the operating data gathered from the system at
the time of failure.
SYSTEM HAS ERROR CODE TROUBLESHOOTING
5-10 373XXA MM