Samsung GT-E2370 Service Manual page 50

Level 3 Repair
8-3-12. GSM900 Transmitter
TX ON (5Level)
Yes
PAM100 Pin17 ≥
30dBm
(TP:C107 using
spectrum analyzer)
No
PAM100 Pin 27 ≥ -4
dBm
(TP:L117, C158 using
spectrum analyzer)
No
PAM100 pin27
≥ -4dBm
(TP:L117, C158 using
spectrum analyzer
No
Check & Resolder
C211,C212,C217,C218,L200,
And PMU Part and UCP200
Yes
END
yes
Yes
Yes
Yes
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Resolder L100, C107
Check PAM100
Pin 4 ( H ≥ 2.4V)
Pin 5 ( L ≤ 0.4V)
Pin 6 ( L ≤ 0.4V)
Check PAM100
VBATT(pin30=3.7V)
(TP:C110) OK?
No
Resolder or Change
L117, C158
8-30
No
Check ANT Switch
control circuit
Yes
Change or Resolder
PAM100
Yes
Change the UCP200
if a damaged chip.
Check VBAT
using the osciliscope
(TP:C110)
or PAM control signal