AR-PB2A (serv.man35). ARPB2-008 Fixing F9 00 error messages - Sharp Copying Equipment Technical Bulletin (repair manual). Page 2

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Sharp Electronics (UK) Ltd., NIS Systems Support
NIS Bulletin 027.doc
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Condition 3:
When updating the ARPB2 firmware from 1.45 directly to 3.22
The first data address in a v1.45 Flash ROM is different to the first data
address in a v3.22 Flash ROM.  Due to this difference, when upgrading
between these versions, an F9:00 occurs.
Fix:
You can overcome this problem by:
a)  upgrading directly from v1.45 to v4.37(AR-PB2A),
b)  upgrading from v2.21 or v2.32 to v3.22.
If you have already upgraded a Flash ROM from v1.45 to v3.22, and it is
exhibiting F9:00 errors you should replace the Flash ROM and upgrade the
replacement directly to v4.37.
Condition 4:
If the PB2 Flash ROM is faulty.
Fix:
Replace the ARPB2 Flash ROM.
Condition 5:
If additional Installed RAM is faulty.
Fix:
Replace the RAM and check whether F9:00 errors still occur.
Condition 6:
If the Copier Engine Firmware is not at the latest level.
Fix:
Check the Sharp Technical Website, and confirm that that the Engine
firmware is at the latest level.
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