TX-L42WT50B, TX-L47WT50B, TX-L47WT50Y, TX-LR47WT50 - Panasonic TV Service Manual (repair manual). Page 12

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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. 
 
Models and Keys: 
 
 
USB HDD Recording: 
General information: 
Digital TV programmes can be recorded in USB HDD. 
A One-to-One key generated in A-board by SELF CHECK binds TV and USB-HDD for communication. 
That key is only one key for them. If the key is difference, TV can not access USB-HDD. 
 
Caution: 
New key will be generated by following SELF CHECK and previous TV programmes recorded in USB HDD will not be 
viewed. 
SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the STATUS         button on the remote control 
for more than 3 seconds 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Keys 
Model No. 
CI PLUS 
DTCP-IP 
One-to-One 
(for USB Rec.) 
Widevine Netflix 
TX-L42WT50B Yes Yes  Yes 
Yes 
Yes 
TX-L47WT50B Yes Yes  Yes 
Yes 
Yes 
TX-L47WT50Y Yes Yes  Yes 
Yes 
Yes 
TX-LR47WT50 Yes 
None None  Yes 
Yes 
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