Panasonic KX-FT25LA Service Manual ▷ View online
After the power is turned on, the ASIC (CPU) initializes and checks each IC.
The ROM, SRAM, and Modem are checked.
If initialization fails for the ICs, the system will not boot up.
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NG Example
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2.3.4.3.2. Check the Status of the Digital Board
Put the unit in the test mode and check the voltage at lands A, B, C and D.
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