2-6
No sound
IC109
Input/Output check
IC204/205 Input check
YES
YES
NO
Is Check about
CN101 pin28, 30?
Check and IC109 replace
YES
NO
JK701 Output check
Graphic FL no operation
Check the CN103
pin15, 16, 17 5V/3.3V?
Check the DC-DC CN902 + 5V.
YES
YES
NO
Check the IC110/105
data line?
Replace IC110 / 105
YES
NO
Check the IC101 pin1~9, 73~80
µ-com IC
Is check IC101
pin19, 20, 50 +5V?
Check IC101 pin1 PWR5V?
YES
YES
NO
Is Check X101
Ocillation O.K?
X101 replace
YES
NO
IC101 replace
NO
Check the IC101 pin10 reset.
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