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6-
10
SGH-V205 Flow Chart of Troubleshooting and Circuit Diagrams
U1005 CHECK
pin15 ≥ -65dBm ?
10. PCS Reciever
CONTINU OUS RX ON
RF INPUT : 660CH
AM P : -50dBm
NORMAL CONDITION
catch the channel?
Check soldered status of
C1001,C1002
U901
pin 12,13≥
-20dBm ?
U1005 CHECK
pin6 ≥ -65dBm ?
F1003 CHECK
pin4,6 ≥ -65dBm ?
U901 CHECK
pin17,18 ≥ -65dBm ?
U902 CHECK
pin 25,28 : 3V ?
CN1001
resolder or change
U1005
resolder or change
C1017,,F1003
resolder or change
C1009,C1010,L1006
resolder or change
U100pin39 , C116
check or resolder
U902 CHECK
pin 7 : 13MHz ?
Vp-p : 860mV?
OSC801 CHECK
pin 4 : clean 3V ?
U902 change or
resolder
U901 CHECK
pin 14,23,26,32:
clean 2.8V?
C808
resolder
OSC801 change or
resolder
U100pin46, C114
check or resolder
U901 pin3,4
Vp-p : 240mV?
U900 CHECK
pin6, 20 : 2.8V ?
U900
resolder or change
U901 pin1,2
Vp-p : 250mV ?
U901
resolder or change
U900 pin 2,3,4,5
Vp-p : 100mV ?
CHECK
U700
NO
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
OSC801 CHECK
pin 3 : 13MHz ?
Vp-p : 950mV?