KE-50XS910 (serv.man2) - Sony TV Service Manual (repair manual). Page 45

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The data on the adjustment values for the main unit are stored in an EEPROM (IC5206, 4 kbits) on the DIGITAL VIDEO Assy. Part 
of the data (area A in the figure below) are automatically copied to an EEPROM (IC4011, 2 kbits) mounted on the INTERFACE Assy for 
backup. When the DIGITAL VIDEO Assy is replaced, the backup data on the adjustment values for the main unit stored in 
the INTERFACE Assy can be copied to the new DIGITAL VIDEO Assy, thus enabling you to omit newly performing adjustments on the 
main unit. The logs for the product (power-down log, etc.) can also be copied.

Using a keyword, the data in areas A and B are judged as to whether they have been adjusted or not, then copying is performed.

1. When the DIGITAL VIDEO Assy is replaced with an Assy for service
Changing of keywords is not required. Replace the DIGITAL VIDEO Assy with an Assy for service, and send the "BCP" RS232C 
command. Thus, the backup data in the EEPROM on the INTERFACE Assy are copied to the EEPROM on the DIGITAL VIDEO Assy for 
service.

2. When a repaired DIGITAL VIDEO Assy is mounted on another unit (reuse of the repaired DIGITAL VIDEO Assy)
The keyword of the DIGITAL VIDEO Assy to be reused must be changed to "not adjusted" using the "UAJ" RS232C command.

Note 1: If a repaired DIGITAL VIDEO Assy is mounted in another unit (Unit 2) without this change of keyword, and the power to the unit 2 is 

turned off, the data in force before the repair of the DIGITAL VIDEO Assy will be copied to Area B of the INTERFACE Assy of Unit 2, 
overwriting the data necessary for Unit 2. Once overwritten, the original data will not be restored.

• Margin adjustment values (Vsus, Vofset)
• Power upper-limit adjustment value (ABL)
• PANEL white-balance adjustment values

(PANEL-R HIGH, PANEL-G HIGH, PANEL-B HIGH, PANEL-R LOW, PANEL-G LOW, PANEL-B LOW)

• Drive waveform adjustment values

(X-SUS-U1, X-SUS-U2, X-SUS-D1, X-SUS-D2, Y-SUS-U1, Y-SUS-U2, Y-SUS-D1, Y-SUS-D2, Y-SUS-D3, Y-SUS-D4)

• Hour meter
• Pulse meter
• Number of times the power has been turned on
• SD logs

Backup data for the 
DIGITAL VIDEO Assy
(Area A)

Backup data for the 
DIGITAL VIDEO Assy
(Area B)

1

Power off

2

"BCP" command

2

"BCP" command

Other data
(Area C)

1 The keyword on the DIGITAL VIDEO Assy is checked when the power is turned off, and if it is "adjusted", automatic backup is performed.
2 If the keyword on the INTERFACE Assy (Area B) is "adjusted," copying can be performed with the "BCP" RS232C command.

Data in the EEPROM on the 
DIGITAL VIDEO Assy
(Area A)
(Not adjusted 

→ Adjusted)

Data in the EEPROM on the 
DIGITAL VIDEO Assy
(Area B)
(Adjusted)