Panasonic KX-DT543-B Service Manual page 21

A
[ DCX81(IC410) ]
Check the TEST POINT(ST0-ST3).
See Table-1.
Is it "NOT Error (No.1)" ?
[ Flash ROM(IC401) ]
[ ASIC2(IC150) ]
YES
[ ASIC1(IC300) ]
Is it possible to call other telephone from DPT?
YES
[ LCD ]
Confirm the LCD display.
Is it working?
YES
END
Boot ROM Error into IC410 (No.2)
NO
See Table-2 (P.23).
Flash ROM(IC401) Data Error
/ DSP Data Error (No.3,4,6,7)
See Table-3 (P.24).
ASIC2(IC150) Data Error (No.5)
See Table-4 (P.25).
NO
See "8.2 ASIC1(IC300) Does Not Operate".
NO
See "8.3 LCD Does Not Operate".
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KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B