Samsung i780 Service Manual page 56

9-2. RECEIVER Working
Change RCV
-Ass'y
Check U402
&Neighboring
Circuits
OPERATE
Receiver
NO
YES
RCV-ASSy'
Break
down?
NO
YES
2,4 Pin in
U402
Signal On?
NO
35, 36 Pin
in UCD400
Signal On?
NO
Check
UCP 200
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5,6 Pin in
U515
Signal On?
YES
NO
Check U515
&
Neighboring
9-9
Flow Chart of Troubleshooting
Check
UCD400
YES
&Neighboring