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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-
14
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5. DCS Transmitter
F1002 pin 13
about 2~3 dBm?
F1002
pin 9 : 2.8 V?
U1001 pin 11
pin 3~4dBm?
U700,U701
check & change
F1002
check & change
CN1001, C1012
check & change
U1001
pin 4 : 3.7 V?
BATTERY, U100
check & change
U1001
pin 5 : 3 V?
U1001
pin2,3:3V?
U1001
pin 6 : 1.2 V?
U1001 pin 1
about : -5dBm?
U1001
change & resolder
U700
check & change
U901
pin14,23,26,32 :
2.8V?
U901
pin9,10,12,13 :
-20dBm?
U902
pin 7 : 13MHz?
Vp-p : 950mV
U902
pin9,10,11,13 :
3V?
U901change or resolder
U901
pin5,6,7,8:
1.7V:
U1001
check & change
U700
change
U100
pin46,C114
change or
resolder
U700
check & change
U100 pin39,c116
change or resolder
OSC801
pin 3 : 13MHz?
Vp-p : 950mV
OSC801
pin 4 : 3V ?
U902
change or resolder
U901
pin5,25,28 :
3V?
U100
pin39,c116
change or
resolder
OSC801
change or
resolder
NO
NO
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
YES
YES
CONTINUS TX ON CONDITION
MS TX level 12
CH : 698
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
