10. gsm transmitter – Sharp SGH-I600 User Manual

Page 87

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Flow Chart of Troubleshooting

9-36

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9-10. GSM Transmitter

TX ON (5Level)

PAM702 pin 6(R709)>=1V

Resolder PAM702(PAM)

VCO800(TXVCO)

pin1(R801)>=3dBm

END

Yes

No

Yes

Yes

Resolder VCO800(TXVCO)

No

PAM702 pin9(C720)>=33dBm

Yes

Resolder PAM702(PAM)

No

U701(ASM)

pin22(C713)>=32dBm

Yes

Resolder U701(ASM)

No

Check UCP600(MSM6275)

Yes

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