CONTREX CX-1200 - Manual (Page 330)

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EEPROM CHIP REPLACEMENT
The EEPROM (Electrical Erasable Programmable Read Only Memory) chip, which is also referred to as the
“Flash Memory”, is the software for the CX-1200.
To replace the EEPROM chip:
• Make a record of your current Control Parameter values; the replacement chip contains default
values that will replace your current values when you perform the "Clear 9" step.
• Turn off the power to the CX-1200 and remove the back panel.
• Pull out the CPU board and locate the 44 pin PSOP Surface Mount Socket that houses the
EEPROM chip.
• Ground yourself - Static electricity can damage the EEPROM chip.
• The PSOP Socket has a positive locking lid design. The lock is attached to the left lid and slides
back and forth in a direction parallel to the hinge pins.
• To open them, first slide the lock sideways (approximately 1mm) to the unlocked position.
• Both lids are now free to be opened by rotating them on their respective hinges.
• Place the SOP component into the socket.