Pcs Transmitter - Samsung SGH-E600 Service Manual

6. PCS Transmitter

F1000 pin 15
about 2~3 dBm?
YES
CN1000,
C1001,R1007
check & change
U1000
pin 4 : 3.7 V?
U1000
pin 5 : 3 V?
U1000
pin 2, 3 : 3 V?
U1000
pin 6 : 1.2 V?
U1000 pin 1
about : -5dBm?
U1000
change & resolder
U100 pin39,C112
change or
resolder
NO
pin4,5,6,7
U700
change
check & change
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SGH-E600/E608 Flow Chart of Troubleshooting and Circuit Diagrams
NO
F1000
pin 5 : 2.8 V?
YES
U1001 pin 11
pin 3~4dBm?
NO
YES
F1000
check & change
NO
BATTERY, U100
check & change
YES
NO
YES
NO
U700
check & change
YES
NO
YES
NO
YES
U901
NO
pin9,32
2.8V?
YES
U901
U901
NO
pin 8 13MHz
1.7V
Vp-p :950mV
YES
U1000
U901change or resolder
NO
CONTINUS TX ON CONDITION
U700,U703
check & change
NO
YES
2-15
MS TX level 12
CH : 698
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
NO
OSC800
OSC800
change or
pin 3 :13MHz?
Vp-p : 950mV
resolder
YES
U100
NO
OSC800 pin39,c112
change or
pin 4 : 3V ?
resolder
YES
U901
change or
resolder