LG KC780 Service Manual page 103

5. TROUBLE SHOOTING
High Band GMSK Tx
High band EDGE Tx
When EGSM band called, it must seem as below.
LGE Internal Use Only
1
1
X= don't care
PAM Circuit
Is PAM
Control Signal
OK?
Is PAM Output
OK?
YES
Check the next part
Fig 14 Debugging flowchart of PAM circuit
1 0
1 1
NO
Replace
PCB
NO
Replace
PAM
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