Egsm Transmitter - Samsung SGH-X430 Service Manual
Gsm telephone
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Also See for SGH-X430:
- Quick manual (83 pages) ,
- Quick reference card (2 pages) ,
- Service manual (37 pages)
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7. SGH-X430 Flow Chart of Troubleshooting
9. EGSM transmitter
NO
U1005 pin 15 :
about 2~3 dBm?
YES
NO
CON1, C1000
check&change
C1013 : 3.7 V?
YES
Between
R1009& U1000
: 1.2V?
YES
NO
R1000:
≒ -5dBm ?
YES
C1016 : 3V?
YES
U1000
change
NO
U900
pin 8 : 13MHz?
U100pin46,C114
Vp-p: 950mV
change or resolder
YES
U900
pin10,12,13,14:
3V?
YES
NO
U901
pin5,6,7,8 :1.7V ?
YES
U1001
change or resolder
U700
change
This Document can not be used without Samsung's authorization
NO
U1005
pin13 : 3 V?
YES
L1010
≒ 4~5dBm?
YES
U1005
check & change
NO
BATTERY, U100
check & change
NO
NO
U700
check
U900 pin9 : 3V ?
YES
NO
NO
U700
check or change
SAMSUNG Proprietary-Contents may change without notice
U700,U701
check & change
NO
R1009
check & change
YES
NO
OSC901
pin 3 : 13MHz?
change or resolder
Vp-p : 950mV
YES
NO
0SC901
U100 pin46,C114
pin 4 : 3V ?
change or resolder
YES
U900
change or resolder
7-10
CONTINUS TX ON CONDITION
TX POWER DAC:500 CODE APPLIED
CH:62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U700
check & change
OSC901
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