Panasonic TU-PT700U Service Manual page 19

Exiting the Serviceman Mode:
Press the Power button on the Receiver.
For Adjustments:
1. Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments and press the OK
button.
Note:
Write Down the original value set for each address before modifying anything. It is easy to erroneously adjust the wrong
item.
2. Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment.
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TU-PT700U