4. TROUBLE SHOOTING
- 68 -
KEY BACKLIGHT
R353
100
LEBB-S14H
LD311
LEBB-S14H
C322
LD309
C317
27p
6
3
1
4
1u
Q300
IMX9T110
2
5
C310
1u
C321
1u
LEBB-S14H
LD307
100
R352
1u
C320
C316
1u
LD313
LEBB-S14H
1u
C311
LD310
LEBB-S14H
LD308
LEBB-S14H
100
R357
100
R350
VBAT
R346
100
R360
10
1u
C313
LD304
LEBB-S14H
1u
C314
R364
10
R363
10
LEBB-S14H
LD312
LD302
LEBB-S14H
R359
12K
VBAT
1u
C318
C323
27p
R348
100
1u
C312
R349
100
C319
R362
12K
1u
C308
1u
100
R356
100
R347
100
R345
R361
10
100
R354
LD300
LEBB-S14H
LEBB-S14H
LD306
R355
100
LD305
LEBB-S14H
R358
100
1u
C309
R351
100
LEBB-S14H
LD301
LD303
LEBB-S14H
1u
C315
KEY_BACKLIGHT
START
Is the level at R359
High?
NO
Check U101
YES
Are all LEDs
Working?
NO
YES
Check the soldering
each R and LED
Backlight will work properly.
NO
Replace or resoldering
component
CIRCUIT
Checking Flow
Summary of Contents for KG225
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model KG225 Service Manual KG225 M O B ILE CAM E R A ...
Page 3: ... 4 ...
Page 19: ...3 TECHNICAL BRIEF 20 Figure 3 4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE ...
Page 66: ...4 TROUBLE SHOOTING 67 4 12 KEY backlight Trouble Q300 R359 TEST POINT Figure 21 ...
Page 79: ... 80 5 DOWNLOAD B Multi Download Procedure 1 Run GSM Multi Download program and select Setting ...
Page 84: ... 85 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Page 85: ... 86 ...
Page 92: ... 93 KG225 8 PCB LAYOUT ...
Page 93: ... 94 KG225 8 PCB LAYOUT ...
Page 101: ... 102 10 STAND ALONE TEST Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 109: ... 110 ...
Page 125: ...Note ...
Page 126: ...Note ...