Panasonic PV-DF204 Service Manual page 15

5.1.5. DVD SERVICE MODE
This unit has a Self-Diagnostic function which detects a problem or malfunction within the unit
and displays on the TV screen.
5.1.5.1. How to enter DVD Service Mode
1. Set the unit to DVD mode.
2. 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.
3. Press DISPLAY key on the remote control to enter the DVD
Service Mode.
4. To confirm the value of JITTER and the value of LASER (current),
insert the DVD Test Disc into the DVD Unit.
5. To release from this mode, turn off the power.
5.1.5.2. Troubleshooting hint (standard) for this mode
It can be determine if the DVD Mechanism Unit is defective by checking the value of JITTER and
the value of LASER (current).
Fig. 5-1
Fig. 5-2
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