SAMSUNG Proprietary-Contents may change without notice
6-2
Troubleshooting
6-1-2 Abnormal Initial Operation (3.0V voltage source)
TCXO CLK
applied to U406 pin 35?
Check TCXO output,
R460 and C467.
Replace if required.
Check U304 and its neighboring
circuit. Replace if required.
Check U202, pin 2 Replace if required.
Check ‘H’ level input U304 pin 38.
Check the LED and its neighboring
circuit. Replace if required.
Check the LCD pins and its
neighboring circuit.
Replace if required.
TCXO CLK signal output
from U304 pin 37?
LCD-CS signal output
from U104 pin 10A?
CHIPX8 CLK signal output
from U304 pin 38?
LED ON?
Normal initial
display on LCD?
END
Yes
Yes
No
No
Yes
No
Yes
No
Yes
Yes
No
No
Press button
END/
Содержание SCH 620
Страница 75: ...9 Block Diagrams SAMSUNG Proprietary Contents may change without notice 9 1 9 1 Main Diagram ...
Страница 76: ...SAMSUNG Proprietary Contents may change without notice 9 2 Block Dirgrams 9 2 CLC BLOCK DIRGRAM ...
Страница 77: ...SAMSUNG Proprietary Contents may change without notice 9 3 MEMO MEMO ...
Страница 78: ...SAMSUNG Proprietary Contents may change without notice 10 1 10 1 Main PCB Top Diagram 10 PCB Diagrams ...
Страница 79: ...PCB diagrams Samsung Electronics 10 2 10 2 Main PCB Bottom Diagram ...
Страница 80: ...PCB diagrams Samsung Electronics 10 3 10 3 CLC PCB Top Diagram 10 4 CLC PCB Bottom Diagram ...
Страница 81: ...PCB diagrams Samsung Electronics 10 4 10 5 Hands free Kit PCB Top Diagram ...
Страница 84: ...Samsung Electronics 11 3 Circuit diagrams 11 3 CLC Circuit Diagram ...
Страница 85: ... Samsung Electronics Co Ltd APRIL 2000 Printed in Korea Code No GH68 00669A BASIC ELECTRONICS ...