Replacing The Main Pcb - Casio EX-843 Service Manual

A. Replacing the Main PCB
When the main PCB is replaced with a spare part one.
• Since an OS is already installed on the spare part main PCB, update the OS to an appropriate
version as required.
Refer to: Diagnostic operation
• Write the serial number.
Refer to: Diagnostic operation
A-1. Removal of the DISPLAY-ASSY
(1) Undo two screws.
Screw (S1)
(2) Remove the DISPLAY-ASSY.
Supplementary explanation
2. UPDATING the OS
1-6. Checking and Registering the Serial Number
– 36 –
V-R200 / VER.1