SAMSUNG Proprietary-Contents may change without notice
6-5
Troubleshooting
6-1-5 Abnormal Key tone
Abnormal Keytone
CLK Waveform output
from U204 pin 17?
CHIP_CELECT U104 pin 7M
CLK waveform applied
to CON102-24 pin 24?
Is the buzzer
connection correct?
Connect the buzzer correcty
Check Q201,Q202,R227,R220,
and D206.Replace if required.
Check U204, pin 15.
Replace if required.
Check U204 pin 17.
Replace if required.
Check the buzzer and
replace if required
Yes
Yes
Yes
Yes
No
No
No
No
Summary of Contents for SCH 620
Page 75: ...9 Block Diagrams SAMSUNG Proprietary Contents may change without notice 9 1 9 1 Main Diagram ...
Page 77: ...SAMSUNG Proprietary Contents may change without notice 9 3 MEMO MEMO ...
Page 79: ...PCB diagrams Samsung Electronics 10 2 10 2 Main PCB Bottom Diagram ...
Page 80: ...PCB diagrams Samsung Electronics 10 3 10 3 CLC PCB Top Diagram 10 4 CLC PCB Bottom Diagram ...
Page 81: ...PCB diagrams Samsung Electronics 10 4 10 5 Hands free Kit PCB Top Diagram ...
Page 84: ...Samsung Electronics 11 3 Circuit diagrams 11 3 CLC Circuit Diagram ...
Page 85: ... Samsung Electronics Co Ltd APRIL 2000 Printed in Korea Code No GH68 00669A BASIC ELECTRONICS ...