5. Trouble shooting
5.15.4 Checking FEM & Mobile SW
RF
TP1
VC1
C622
33p
TP2
VC2
C627
33p
PAD600 PAD601
PAD602
R608
0
C633
0.75p
TP10 | 4 |
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GND2 | ||||
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C631 |
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5p | GND1 | |||
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L605
12nH
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GND4GND3 OUT | 2 | 22p | ||
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TP9 5
L604
NA
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| 19 | 20 | |||||
| VC1 | VC2 |
| GND1 | GND2 | GND3 | GND4 | GND5 |
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17 ANT |
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| GSM1800 1900TX GSM850 900TX | |||
GSM850RX1 GSM850RX2 | GSM900RX1 | GSM900RX2 GSM1800RX1 | GSM1800RX2 | GSM1900RX1 | GSM1900RX2 |
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
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U601
C634
0.5p
TP5,6,7,8
Mobile SW & FEM Circuit
TP10
CN600 TP9
TP2_C625 (ANT_SW2)
TP1_C621 (ANT_SW1)
U600
TP5~8
Mobile SW & FEM Checking Points
TX Mode | EGSM | DCS | PCS |
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ANT_SW1 | On | Off | Off |
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ANT_SW2 | Off | On | On |
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FEM TX Control Logic
Copyright © 2008 LG Electronics. Inc. All right reserved. | - 101 - | LGE Internal Use Only |
Only for training and service purposes |
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