Panasonic DMR-UBS80EG Service Manual page 14

3.4.2. Nondisclosure mode 1 (Combination of multiple pressing: [6] [7] [Yellow])
Press and hold [6] [7] [Yellow] on the remote control simultaneously for 5 sec., then "50 RET" is displayed on FL display window.
3.4.3. Nondisclosure mode 2 (Combination of multiple pressing: [5] [9] [Red])
Press and hold [5] [9] [Red] on the remote control simultaneously for about 5 sec., then "70 RET" is displayed on FL display window.
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