Panasonic TH-42PHD6A Service Manual page 16

9. Service mode
9.1. CAT (computer Aided Test) mode
To exit the CAT mode , access the ID mode and switch off the main power.
9.1.1. IIC mode
Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode then
press the Action button on the remote control.
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