SAMSUNG Proprietary-Contents may change without notice
8-2
Trouble Shooting
8-1-2 Abnormal initial operation (3.0V voltage source)
Press PWR Key
TCXO CLK
applied to U501 pin 35/
U103 pin 36?
TCXO CLK
signal outputted from
U103 pin 37?
RAM-CS signal outputted
from U100 pin 92?
CHIP X 8 CLK
signal outputted from
U103 pin 38?
LED on?
Check the LED and its neighboring
circuits. Replace if required.
Normal initial
display on LCD?
Check the LCD pins and its neighboring
circuits. Replace if required.
Check ’H’ level input from
U103 pin38.
Check MSM board,
U100 pins 93-96,
98-105, 107-117, 119-126, and
128-132. Replace if required.
Check U103 and its neighboring
circuits. Replace if required.
Check VCTCXO output.
END
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO