Samsung SCH-211 Service Manual page 42

6-1-5 Abnormal Keytone
Abnormal keytone.
CLK waveform output
from U101 pin 49?
CLK waveform
applied to U111 pin 2?
CLK waveform
applied to J101 pins11,
and 14?
Normal keytone?
Samsung Electronics-Contents may change without notice.
N
Y
N
Y
N
Y
N
Y
END
Check U101 pin 49. Replace if required.
Resolder R141, C146, R145, C142,
R136, and C141.
Check U111.
Replace if required.
Replace the Keypad assembly.
Troubleshooting
6-5