Flow Chart of Troubleshooting
9-15. GSM Transmitter
TX ON (5Level)
Yes
①
MODULE100 Pin13≥
No
MODULE100 pin10
≥ 30dBm
Yes
Yes
Resolder
MODULE100,C102,L102
Check MODULE100 | No |
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pin11 = H (2.6V), |
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Pin10 = L |
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Check ANT Switch control circuit
No
PAM100 pin11
≥ 30dBm
No
PAM100 pin7
≥
No
U100 pin
C2,B1,B2,A1
≥ 0.2Vp_p
No
Check UCP200
END
Yes
Yes
Yes
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| Yes | ② |
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③ |
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| Change or Resolder | |
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| MODULE100 | |
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Resolder or Change C105,L109, |
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C106 |
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| ④ | |
Check PAM100 pin | Yes |
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2,3,5,6,8, +Vbatt |
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| Resolder or Change PAM100 | ||
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pin4OK? |
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| No |
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| Check VBAT or PAM |
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| control signal |
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U100 pin G4,F3,D6, |
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No |
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C5,B3,A5,F1 |
| Check & Resolder | ||
29,32,33,36 ≥2.8V |
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| C115,C116,C117,C114 And | |
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pin C1 ≥2.9V |
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| PMU Part | |
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⑥
Yes
Resolder U100
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