LG Electronics LG-C320 service manual Dcs/Pcs =, Gpam Logic Control

4. TROUBLE SHOOTING

4.17.3 Checking GSM Tx part

Setup Test Equipnment

Cell power = -60dbm

Tx Power Level Set

GSM850/GSM900 = 5,

DCS/PCS = 0

YesYes

Is the level of TP4 same

to Table 4.17.3

Yes

TP2, 30dBm over?

TP3, 33dBm over?

Yes

Check TP1,

GSM850, EGSM 32dBm

DCS,PCS 29dBm over?

Yes

Re-download & calibration

No

No

No

Check U201

Remove U101 and check

The power of pin1, pin8 (on board)

Yes
The power of pin1, pin8	No

Replace U101

Check U201

Table 4.17.3 GPAM Logic Control

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