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4.12 Keypad Backlight Trouble
Block Diagram
Backlight Operation
• The keypad LED backlight is controlled with LEDB signal.
• LEDB signal from ABB.
• The LEDs are forward biased and turned on.
Trouble Shooting Setup
• Connect PIF-UNION to the phone, and power on.
• Enter the engineering mode.
• Go to menu. “Baseband
→
LED
→
Backlight
→
Keypad on”
Trouble Shooting Procedure
• Check the soldering of components
• Check the LEDB signal
• Check LEDs
Check Points
• LEDB signal
• LEDs
KEY BACKLIGHT
200
R325
LD310
200
R328
LD309
R334
20
LD306
LD312
R323
200
200
R319
LD311
LD300
LD305
R331
200
VA301
200
R322
R317
200
LD304
LD313
LD302
LD308
LD301
LD303
VBAT
LD307
200
R329
200
R324
R318
200
20
R333
R327
200
R330
200
R326
200
200
R316
LEDB
Check
LEDB signal
R333, R334
Check
soldering !
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Содержание MG210
Страница 1: ...Date May 2006 Issue 1 0 Service Manual MG210 Service Manual Model MG210 Z 3 X B O X C O M ...
Страница 3: ... 2 Z 3 X B O X C O M ...
Страница 5: ...Z 3 X B O X C O M ...
Страница 32: ...3 H W Circuit Description 31 Figure 14 Power Supply Scheme Z 3 X B O X C O M ...
Страница 45: ...4 2 KEYPAD Components Placement 4 TROUBLE SHOOTING 44 U301 MIC200 Z 3 X B O X C O M ...
Страница 46: ...4 TROUBLE SHOOTING 45 4 3 FPCB Components Placement 4 4 Baseband Components LD1 BAT1 CN2 CN3 Z 3 X B O X C O M ...
Страница 87: ...4 TROUBLE SHOOTING 86 Waveform PA_ON VRAMP Z 3 X B O X C O M ...
Страница 91: ...5 DOWNLOAD 90 5 2 Download Procedure 5 2 1 Computer Program file MultiGSM exe Click Z 3 X B O X C O M ...
Страница 93: ...5 DOWNLOAD 92 5 2 3 Configuration Setting C GSMULTI Model MG210 dll Z 3 X B O X C O M ...
Страница 94: ...5 DOWNLOAD 93 5 2 4 Press Start Button MG210 Z 3 X B O X C O M ...
Страница 95: ...5 DOWNLOAD 94 5 2 5 After Start Button Which Stand by condition MG210 Z 3 X B O X C O M ...
Страница 96: ...5 DOWNLOAD 95 5 2 6 SW downloading Condition MG210 Z 3 X B O X C O M ...
Страница 97: ...5 DOWNLOAD 96 5 2 7 SW downloading END Condition MG210 Z 3 X B O X C O M ...
Страница 100: ...6 SERVICE AND CALIBRATION 99 4 Click on CALIBRATION START button MG210 MG210 Z 3 X B O X C O M ...
Страница 101: ... 100 Z 3 X B O X C O M ...
Страница 106: ... 105 8 pcb layout Z 3 X B O X C O M ...
Страница 107: ... 106 8 pcb layout Z 3 X B O X C O M ...
Страница 111: ... 110 Z 3 X B O X C O M ...
Страница 126: ...Note Z 3 X B O X C O M ...
Страница 127: ...Note Z 3 X B O X C O M ...