Pcba-Base With Feed-Dog Drop Detection; Eeprom (Electrically Erasable Programmable Read-Only Memory) - Bernina B 590 Service And Maintenance Manual

4.2.4 PCBA-Base with feed-dog drop detection

When replacing PCBA-Base, EEPROM must be moved from the former to the new PCBA-
Base immediately. Important data for flawless operation is stored there. (see 4.2.4.1)
See ESD-related note
Disassembly:
• Remove the covers (see 4.1)
• Picture 1 - Disconnect all plugs.
• Picture 1 - Remove 5 screws a (T20 M4x10).
• Picture 1 - Slide PCBA-Base out to front carefully with
feed-dog drop 1.
Assembly:
• Picture 1 - Position PCBA-Base on frame.
• Picture 1 - Refit and retighten four screws a.
• Picture 1 - Reconnect all plugs (taking note of the
labeling)
Important!
Is the EEPROM attached?

4.2.4.1 EEPROM (Electrically Erasable Programmable Read-Only Memory)

When replacing the PCBA-Base, remove
the EEPROM from the old PCBA and
directly fit it on the new PCBA.
See ESD-related note
Disassembly:
• Picture 1 - Use IC extraction tool 1 (032948.50.00)
to remove EEPROM 2.
Assembly:
• Attach EEPROM 2 to base.
• Take care to fit EEPROM in the correct position
(markings must match) and avoid bending the
contacts.
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