Dcs Transmitter - Samsung GT-E2370 Service Manual

8-3-13. DCS Transmitter

TX ON (0 Level)
Yes
PAM100 Pin17 ≥
30dBm
(TP:C107 using
spectrum analyzer)
No
PAM100 pin2 ≥ -4
dBm
(TP:L116, C157 using
spectrum analyzer)
No
PAM100 pin29
≥ -4dBm
(TP:L116, C157 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 ( H ≥ 2.4V)
Pin 6 ( L ≤ 0.4V)
Check PAM100
VBATT(Pin30=3.7V)
(TP:C110) OK?
No
Resolder or Change
L116, C157
8-31
Level 3 Repair
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