Panasonic GD90 Service Manual page 56

TEST AND MEASUREMENT
6.7.2 Change current lock code
1. At the Channel box press SHIFT and F4 and highlight PROG LOCK CONDITION. Press ENTER.
2. Press ENTER to unlock the Unit Under Test. The current lock code will be used.
3. Enter "0000" to reset and lock the Unit Under Test to the factory default lock code "0000".
Issue 1
Revision 0
Figure 6.26: Program lock code
Section 6
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MCUK990801C8
Service Manual