LG B2050 Service Manual - Page 83
RTC Trouble
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4 . TROUBLE SHOOTING 4.13 RTC Trouble TEST POINT CIRCUIT DIAGRAM R110 10M BAT100 X100 MC-146_12.5pF 3 4 2 1 32.768KHz C129 1000p CLKON TP122 C130 NA PWRON _RESET RADIO_STO RADIO_DETECT SPK_RADIO_SEL N10 P13 CLKIN CLKON C9 E9 OSCOUT F9 OSCIN PWRON V3 NRESET L18 GPIO_0_IRDA_TX L14 K16 GPIO_1_IRDA_RX GPIO_2_NIRDA_EN K18 R104 1u C112 C113 1u C114 1u C115 C116 C117 C118 1u 1u 2.2u (1608) 1u 10K C149 27p - 82 -
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- 82 -
4 . TROUBLE SHOOTING
4.13 RTC Trouble
TEST
POINT
CIRCUIT DIAGRAM
0
3
1
C
A
N
1
2
3
4
z
H
K
8
6
7
.
2
3
0
0
1
X
F
p
5
.
2
1
_
6
4
1
-
C
M
N
I
C
S
O
9
E
9
C
T
U
O
C
S
O
N
O
R
W
P
9
F
3
V
T
E
S
E
R
N
6
1
K
N
E
_
A
D
R
I
N
_
2
_
O
I
P
G
8
1
K
X
T
_
A
D
R
I
_
0
_
O
I
P
G
8
1
L
X
R
_
A
D
R
I
_
1
_
O
I
P
G
4
1
L
N
I
K
L
C
0
1
N
N
O
K
L
C
3
1
P
p
0
0
0
1
9
2
1
C
2
2
1
P
T
R110
10M
O
T
S
_
O
I
D
A
R
T
C
E
T
E
D
_
O
I
D
A
R
L
E
S
_
O
I
D
A
R
_
K
P
S
N
O
R
W
P
N
O
K
L
C
T
E
S
E
R
_
)
8
0
6
1
(
u
1
6
1
1
C
u
1
5
1
1
C
BAT100
u
1
4
1
1
C
u
2
.
2
7
1
1
C
u
1
2
1
1
C
p
7
2
u
1
9
4
1
C
8
1
1
C
K
0
1
4
0
1
R
u
1
3
1
1
C