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SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-34
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8-3-2-4. GSM900 Transmitter
TX ON(Call Connected)
TCH Channel : 62 Ch
TCH Pwr = 5Level(33dBm)
BCH Pwr = -50dBm
Resolder or Change PAM100
Yes
RFS101 Pin2
>= 20dBm
Resolder RFS100,L103,C100,L149
Check RFS100
pin3 = H, pin4 = L
,
,pin5 = L, pin6 = L
,
pin7 =2.7V
(C105,107)
RFS101 pin11
>= 20 dBm
PAM100 pin
10
>= 20 dBm
1.5dBm >=
PAM100 pin7
> = 4dBm
Change or Resolder
RFS100
Check
R107,109,110,111
and UCP300, U401
(crack,open,etc)
Resolder L152,C114,L105
U100 pin 55
>= 0dBm
Check PAM100
and VBAT(pin4) OK?
(C103)
Check VBAT or PAM
control signal(Pin5,6)
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
END
Check U100 & UCP300
(crack,open,etc)
No
Resolder C139,R121,101,122