- 79 -
4 . TROUBLE SHOOTING
Checking Flow
START
Is the voltage level VBAT
3.6~4.2V?
Are all LEDs
Working?
Backlight will work properly
Replace or resoldering
component
Check the soldering
each R and LED
Charge battery
YES
NO
NO
NO
YES
CIRCUIT DIAGRAM
T
H
G
I
L
K
C
A
B
Y
E
K
H
4
1
S
-
B
B
E
L
5
0
3
D
L
u
1
9
1
3
C
7
4
8
4
3
R
7
4
7
4
3
R
6
4
3
R
7
4
9
4
3
R
7
4
7
4
5
4
3
R
4
0
3
D
L
H
4
1
S
-
B
B
E
L
T
A
B
V
2
2
3
C
u
1
u
1
3
2
3
C
H
4
1
S
-
B
B
E
L
0
0
3
D
L
0
2
3
C
u
1
1
2
3
C
u
1
8
1
3
C
u
1
H
4
1
S
-
B
B
E
L
3
0
3
D
L
4
4
3
R
7
4
1
0
3
D
L
H
4
1
S
-
B
B
E
L
H
4
1
S
-
B
B
E
L
2
0
3
D
L
2
L
B
_
Y
E
K
_
I
D
I
M
1
L
B
_
Y
E
K
_
I
D
I
M
Содержание B2070
Страница 54: ... 53 4 TROUBLE SHOOTING 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM ...
Страница 68: ... 67 4 TROUBLE SHOOTING TEST POINT 4 6 LCD Trouble ...
Страница 72: ... 71 4 TROUBLE SHOOTING TEST POINT 4 8 Speaker Trouble ...
Страница 79: ... 78 4 TROUBLE SHOOTING 4 11 KEY backlight Trouble TEST POINT ...
Страница 96: ...6 Press Start and Pover on the phone using JIG remote Power on Switch 1 5 DOWNLOAD AND CALIBRATION 95 ...
Страница 107: ... 106 8 PCB LAYOUT Figure 8 1 B2070 BOTTOM SIDE PCB LAYOUT ...
Страница 108: ... 107 8 PCB LAYOUT Figure 8 1 B2070 TOP SIDE PCB LAYOUT ...
Страница 109: ... 108 ...
Страница 117: ...10 STAND ALONE TEST 116 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 121: ... 120 ...
Страница 123: ... 122 ...