4. TROUBLE SHOOTING
- 63 -
4.11 Key Backlight LED Trouble
4.11 Key Backlight LED Trouble
SETTING: Connect PIF to the phone, and power on. Enter engineering mode,
and set “Backlight on” at “BB test-Backlight” menu
Is the voltage level at Pin1 at
O301 about 1.2V?
START
PIF Power On
Are all LEDs
LD300~LD305 working
Backlight LED
Working!!
Yes
No
No
Yes
Check the soldering or
Replace LEDs not working
Check the soldering of
R313,R315
Q
Q330011
U
U330022
R
R331133
R
R331155
R
R331166
R
R331111
R
R331122
LLD
D330011
LLD
D330055
LLD
D33003
LLD
D330044
LLD
D330022
LLD
D330000
R
R330066
R
R331100
R
R330088
R
R330099
R
R330077
R
R330055
Figure 4-26
Figure 4-25
R310
T
H
G
I
L
K
C
A
B
Y
E
K
R314
4.7K
3
2
3
C
p
7
2
LD300
LEBB-S1
4H
R306
47
LEBB-S1
4H
LD3
03
47
R307
0.1u
C317
LEBB-S1
4H
LD3
04
2
1
3
R
0
47
6
1
3
R
0
100K
R31
5
1
2
3
C
p
7
2
R308
47
LEBB-S1
4H
LD3
01
p
7
2
9
1
3
C
1.5K
R31
3
LE
BB
-S
14H
LD
305
47
R3
09
8
1
3
C
u
1
.
0
4
2
3
C
p
7
2
47
R3
05
p
7
2
2
2
3
C
15
R3
17
Q
301
IM
X9
T110
2
5
6
3
1
4
LD
30
2
LE
BB-
S1
4H
10K
R3
11
0
2
3
C
p
7
2
M
O
C
5
3
GND
IN
1
4
C
N
O
N
6
VC
C
2
2
T
F
D
9
9
5
4
T
S
A
L
N
2
0
3
U
T
H
G
I
L
K
C
A
B
_
Y
E
K
N
O
R
W
P
R
VBAT
VBAT
VCHARGE
sv sv sv sv sv sv sv sv sv sv sv
sv
sv
sv
sv
sv
sv
sv
sv
sv sv
sv
sv
sv
sv
sv
sv
sv
Figure 4-25
Figure 4-26
Summary of Contents for G1610
Page 1: ...Service Manual Model G1610 Service Manual G1610 P N MMBD0045701 Date February 2005 Issue 1 0 ...
Page 52: ...4 TROUBLE SHOOTING 51 Graph 4 14DCS TX Graph 4 15EGSM TX VC1 VC2 VC1 VC2 VC1 VC2 VC1 VC2 ...
Page 70: ...5 DISASSEMBLY INSTRUCTION 69 5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 ...
Page 71: ...5 DISASSEMBLY INSTRUCTION 70 Figure 5 3 Figure 5 4 ...
Page 72: ...5 DISASSEMBLY INSTRUCTION 71 Figure 5 5 ...
Page 73: ...5 DISASSEMBLY INSTRUCTION 72 Figure 5 6 1 3 2 4 Figure 5 7 1 2 3 ...
Page 74: ...5 DISASSEMBLY INSTRUCTION 73 Figure 5 8 4 2 3 1 2 1 Figure 5 9 ...
Page 75: ...5 DISASSEMBLY INSTRUCTION 74 Figure 5 10 ...
Page 86: ...7 BLOCK DIAGRAM 85 7 BLOCK DIAGRAM Power supply ...
Page 87: ... 86 ...
Page 108: ...12 AUTO CALIBRATION 107 12 3 Equipment Setup Figure 12 1 Equipment Setup ...
Page 111: ...12 AUTO CALIBRATION 110 ...