LG TracFone LG840G Service Manual page 55

4.3.4 Checking GSM Tx part
Setup Test Equipment
Cell Power = -60dBm
Tx Power Level Set
(GSM=5, DCS/PCS=0)
Is the level of
TP4, TP5 same
to Table.1?
Yes
TP2, 30dBm over?
TP3, 33dBm over?
Yes
Check TP1
GSM850 33dBm, EGSM 32.5dBm
DCS/PCS 29.5dBm
over?
Yes
Re-download & Calibration
LGE Internal Use Only
No
TP4 : Check U201
TP5 : Check VBAT Line
No
Remove U101 and check
the power of pin1, pin8.
(on board)
No
The power of pin1,
Pin8 Is over 0dBm?
Replace U101
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4. TROUBLE SHOOTING
Yes
No
Yes
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Only for training and service purposes
Check U201