Service manual

1. Turn the upper key switch straight up to the Off position (0).
2. Remove the defective CPU module.
3. Insert the new processor module.
4. Turn the lower key switch to Halt.
5. Turn the upper key switch to Enable.
6. Check the self-test display for the processor, indicated by a P on the
TYP line (usually in slot 1). See
6
.
7. If the processor shows a plus sign (+) on both the STF and ETF lines,
it passed self-test. See
7
.
8. Compare the ROM revision
8
of the new processor with the ROM
revision of the one you just replaced. If they are the same, continue
with this procedure; otherwise use the second method described in
Section 4.15.2.
9. You will see the following message:
9
?4F System serial number has not been initialized.
10. Turn the lower key switch to Update.
11. Mount the TK cartridge containing the most recent saved image of the
old processor’s EEPROM.
1
12. Issue the console command RESTORE EEPROM
12
to copy all areas
of the EEPROM except the module-specific area to the boot processor’s
EEPROM.
13. If any patches have been issued since the last save, use EVUCA to
patch the EEPROM. See Section 4.18 for details.
14. Turn the lower key switch to the Auto Start position.
15. Boot the operating system
15
. Booting will initialize the system and
the EEPROM will be read. If the system console baud rate was not
normally set at 1200, you will have to change the terminal baud rate
back to its original value.
1
When the system is installed or after maintenance, customer service engineers should
save the EEPROM on a TK cartridge if available. The cartridge is left in the care of the
customer. Subsequently, the EEPROM might have been changed and saved several times.
This would normally happen following a PATCH operation.
<REFERENCE>(XRP) Scalar Processor 4–47