Panasonic TX-17LA1M Service Manual page 22

TX-17LA1M
9.5. Option Code Setting (20 inch model)
If the memory IC (IC1004) or DG Board is replaced, option code should be re-memorized.
Spare part of IC1004 is already memorized all Data for TX-20LA1M.
If you use for other model, you should re-memorized the different option code in SERVICE 2 mode.
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