LG KG110 - Inbox and Outbox Management

40
4. TROUBLE SHOOTING
4.3.4 Check PAM control signal
40
C410 10p C411 27p
PA_EN
TX_RAMP
R418 100
R419 100
GSM850_900_IN
1
VRAMP
4
VBATT
5
VMODE_EN
3
VBS2
7
DCS_PCS_IN
11
GND1
13
GND2
15
GND3
17
GND4
19
GND5
21
VCC1
2
VBS1
8
VTX
6
V1
1
0
VCC2
9
ANT
20
RX4
18
RX3
16
RX2
14
RX1
12
U401
TQM6M4003
YES
Check Tx_ramp & TxEN
Check if there is any
Major Different
Refer to Graph 4-9
NO
Replace U101
Similar ?
See next page to check
TX ant SW & mobile SW
R418
Settin
Tx_ramp
Figure 4-13
Tx_EN