TX-L55ET5B, TX-L55ET5Y, TX-LR55ET5 - Panasonic TV Service Manual (repair manual). Page 11

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Technical Description 
Specification of KEY for CI Plus, DTCP-IP, One-to-One, Widevine and Netflix 
General information: 
1. EEPROM (IC8902) for spare parts has the seed of KEY for each. 
2. The final KEY data will be generated by LDA4 IC (IC8000) when SELF CHECK was done and are stored in both LDA4 IC     
    (IC8000) and  EEPROM (IC8902). 
    All KEYs are not generated for all models. 
    The necessary KEY are only generated and stored depend on the feature of models. 
 
Replacement of ICs: 
When LDA4 IC (IC8000) is replaced, EEPROM (IC8902) should be also replaced with new one the same time. 
When EEPROM (IC8902) is replaced, LDA4 IC (IC8000) is not necessary to be replaced the same time. 
After the replacement of IC, SELF CHECK should be done to generate the final KEY data. 
How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the STATUS         button on the remote 
control for more than 3 seconds. 
TV will be forced to the factory shipment setting after this SELF CHECK. 
 
Model and Keys: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Keys 
Model No. 
CI PLUS 
DTCP-IP 
One-to-One 
(for USB Rec.) 
Widevine Netflix 
TX-L55ET5B Yes 
Yes 
None  Yes  Yes 
TX-L55ET5Y Yes 
Yes 
None  Yes  Yes 
TX-LR55ET5 Yes 
None 
None  Yes  Yes 
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