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Flow Chart of Troubleshooting
9-30
9-15. DCS/PCS TX
TX ON (PCL 0 level)
F101 pin15
>=0 dBm
Yes
No
Yes
Check
F101 truth
table
No
Resolder or Change
F101,
C119,L116 (PAM out)
Yes
Yes
No
Check U200
END
PAM100 pin16
>=0 dBm
No
Check Vramp
OK
Check VBAT or
Resolder / Change
PAM100
Yes
No
No
PAM100 pin2
>=-25 dBm
1.
Check FEM(F101) output
2.
Check FEM(F101) input
3.
Check PAM(PAM100) output
4.
Check PAM(PAM100) input
5.
Check RTR6275(U101)
②
①
③
④
⑦
Pin#6: High
Pin#5: High
Pin#4: Low
Check
Operating
mode
Yes
No
⑤
Pin#5(BS)=H
Pin#6(EN)=H
F101 pin11
>=0 dBm
Resolder RFS101,
C105,L101,R105,L132
Check
R107,R110,
R116,UCP201
Resolder or
Change F101
Resolder PAM100,
Check UCP201
Resolder or change
R129,UCP201