KX-TG6451RUT, KX-TGA641RUT - Panasonic Telephone Service Manual (repair manual). Page 92

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(*1) Reconfirm the model No. written on the cordless hand-
set’s name plate when replacing PCB100. Because the
model No. of the optional handset may differ from the
included handset.
(*2) When replacing IC1, IC3 or X1, make the adjustment
using PNZZTG6451RU. Refer to Cordless Handset (P.59)
of Things to Do after Replacing IC or X'tal.
(*3) When you removing E105, use special tools (ex. Hot air
disordering tool).
(*4) When replacing the cordless handset LCD, See How to
Replace the Cordless Handset LCD(P.50).
(*5) Backside of this IC has a ground plate.
(*6) Supplied IC is Flat Package Type.