KX-DT521RU - Panasonic PBX Service Manual Supplement (repair manual). Page 7

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7
NO
YES
Check the TEST POINT(ST0-ST3).
See Table-1.
Is it "NOT Error (No.1)" ?
YES
NO
YES
Confirm the  LCD display.
Is it working?
END
Boot ROM Error into IC410 (No.2)
NO
Is it possible to call other telephone from DPT?
[ DCX81(IC410) ]
[  Flash ROM(IC401) ]
[ ASIC1(IC300) ]
A
[ LCD
 ]
[ ASIC2(
IC205
) ]
See Table-2 (
P.23
).
Flash ROM(IC401) Data Error
/ DSP Data Error (No.3,4,6,7)
See Table-3 (
P.24
).
ASIC2(IC205) Data Error (No.5)
See Table-4 (
P.25
).
See "
8.2 
ASIC1(IC300) Does Not Operate".
See "
8.3
 LCD Does Not Operate".
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