KE-50XS910 (serv.man2) - Sony TV Service Manual (repair manual). Page 46

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3. When a repaired DIGITAL VIDEO Assy is mounted on the original unit (reuse of the repaired DIGITAL VIDEO Assy) 
Changing of keywords is not required. After the repaired DIGITAL VIDEO Assy is mounted in the original unit, the unit can operate with 
its latest adjustment values.
4. When both the DIGITAL VIDEO Assy and INTERFACE Assy are simultaneously replaced with other assemblies
The automatic backup function of this unit will not work properly.
Note 2: Readjustment of the main unit is required.
Note 3: After readjustment of the main unit, send the "FAJ" RS232C command to change the keyword of the DIGITAL VIDEO Assy to 
"adjusted." Thus, when the unit is turned off, automatic backup of adjustment data is performed properly.
Note 4: If readjustment of the main unit is totally impossible, it can be omitted by installing the EEPROM (IC5206, 4 kbits) originally mounted 
on the DIGITAL VIDEO Assy for service.
Photograph to confirm the EEPROM remounting position when the DIGITAL VIDEO ASSY is changed.
DIGITAL VIDEO ASSY
EEPROM (IC5206, 4kbit)
SIDE B
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