Dcs Transmitter - Samsung SGH-E750 Service Manual

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7-16. DCS Transmitter

TX ON (0Level)
Y e s
Module1 pin8
> = 20dBm
No
Module1 pin13
> = 18dBm
No
U101 pin9
> = 18dBm
No
U101 pin1
-11dBm
> =
No
U100 H7, H 8, J 7, J 8
> = 1V
Y e s
Check U200
END
Y e s
Resolder CN100, C103
Y e s
Y e s
Y e s
No
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used with out Samsung' s authorization
Check Module1
pin12 = H (2.68V) ,
pin9, pin10 = L
Y e s
Resolder C109, L108, C113
Check U101
+ V BAT , pin4 , pin6
OK?
No
Check U100
J2 , A 6 , B 6 , A 9 , E 9
> = 2 .7V
OK?
Y e s
7-31
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
Module1
Y e s
Resolder or Change U101
Check + V BAT or U101
control signal
Check & Resolder
No
U100 , R117
RF26MHz , RF PSU Part
Resolder U100

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