Samsung SGH-V205 Service Manual page 27

9. DCS Reciever
CONTINU OUS RX ON
RF INPUT : 698CH
AM P : -50dBm
NORMAL CONDITION
catch the channel?
YES
U1005 CHECK
pin15 ≥ -65dBm ?
YES
U1005 CHECK
pin15 ≥ -65dBm ?
YES
U901 CHECK
pin19,20 ≥ -65dBm ?
YES
U901
pin 12,13≥
-20dBm ?
YES
U901 CHECK
pin 14,23,26,32:
clean 2.8V?
YES
U901 pin3,4
Vp-p : 240mV?
YES
U901 pin1, 2
Vp-p : 250mV ?
YES
U900 pin 2,3,4,5
Vp-p : 100mV ?
YES
SGH-V205 Flow Chart of Troubleshooting and Circuit Diagrams
NO
Check soldered status of
C1001,C1002
NO
CN1001
resolder or change
NO
U1005
resolder or change
NO
C1005,C1006,L1002
resolder or change
NO
U902 CHECK
pin 25,28 : 3V ?
YES
U902 CHECK
pin 7 : 13MHz ?
Vp-p : 860mV?
YES
U902 change or
resolder
NO
U100pin46, C114
check or resolder
NO
U900 CHECK
pin6, 20 : 2.8V ?
YES
U900
resolder or change
NO
U901
resolder or change
NO
CHECK
U700
SAMSUNG Proprietary-Contents may change without notice
NO
U100pin39 , C116
check or resolder
NO
OSC801 CHECK
pin 3 : 13MHz ?
Vp-p : 950mV?
YES
R805,C808
change or resolder
NO
6-9
NO
NO
OSC801 CHECK
pin 4 : clean 3V ?
YES
OSC801 change or
resolder