Panasonic PV-DF2700-K Service Manual page 17

Note:
When 1 to 4 listed in Lock code occurs, the VCR stops and all VCR function
buttons except for power become non-operational.
5.1.2. SELF-DIAGNOSTIC TEST FUNCTION FOR DVD
This unit has a Self-Diagnostic function which detects a problem or malfunction
within the unit and displays its corresponding Error code on TV Screen.
5.1.2.1. How to enter DVD Self-Diagnostic mode
1. Insert a DVD disc into the DVD Unit.
2. Set the unit to DVD mode. Then, press STOP button to stop playback.
Note:
Do not let a DVD play during DVD Self-Diagnostic mode.
3. Press and hold STOP/EJECT, PLAY/REPEAT, and VOL- buttons of VCR operation
panel of the unit together for over 5 seconds with no cassette inserted. The
adjustment overlay will appear on the TV screen.
Fig. 2-1
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