LG GX500 - Page 109

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4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 110/143 LGE Property
4.14.1 Checking Main Clock part
Checking Points
TP2(26MHz)C645
TP1 (CLK_REQ)R606
Check
TCXO
No
Yes
Check Module Part
Fi
g
ure 4-62. WI-FI/BT/FM Clock
p
art
(
TP1
,
2
)
is OK ?
STAR
T
TP1 (CLK_REQ)
TP2 (26MHz)
Checking Flow
Figure 4-63. WI-FI/BT/FM Clock Circuit
GX500 Operational Description Revision A
LG Electronics 110/143 LGE Property
4.14.1 Checking Main Clock part
Checking Points
TP2(26MHz)C645
TP1 (CLK_REQ)R606
Check
TCXO
No
Yes
Check Module Part
Fi
g
ure 4-62. WI-FI/BT/FM Clock
p
art
(
TP1
,
2
)
is OK ?
STAR
T
TP1 (CLK_REQ)
TP2 (26MHz)
Checking Flow
Figure 4-63. WI-FI/BT/FM Clock Circuit
606R
K0
01
2V7_VTOUCH
VBAT
C643
1u
C646
1u
1u
C647
100K
R607
VDD_TCXO
U604
9
54
63
72
81
VIN
VOUT1
EN1 VOUT2
P2 GND
P1 EN2
DNGP
VDD_TCXO
1uF
C644
Fu100.0
5
4
6C
X601
26MHZ
TG-5010LH-87N
4 2
3 1
NC
OUT
GNDVCC
BT_CLK_REQ
CLK_IN
TOUCH_EN
26MHz TCXOLDO for TCXO
TP1 (CLK_REQ)
GX500 Operational Description Revision A
LG Electronics 110/143 LGE Property
4.14.1 Checking Main Clock part
Checking Points
TP2(26MHz)C645
TP1 (CLK_REQ)R606
Check
TCXO
No
Yes
Check Module Part
Fi
g
ure 4-62. WI-FI/BT/FM Clock
p
art
(
TP1
,
2
)
is OK ?
STAR
T
TP1 (CLK_REQ)
TP2 (26MHz)
Checking Flow
Figure 4-63. WI-FI/BT/FM Clock Circuit
TP2 (26MHz)