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4 . TROUBLE SHOOTING
Checking Flow
START
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
I/O Connector (CN300)
is well-solderd?
The TA is out of order
Change the TA
Resoler the
Q100, D100, R108
Replace the
Q100, D100
Replace the
Q100
The battery may have
problems.
Change the battery.
Resolder the CN300
Pin 4,5 : VCHARGE
Pin 12,26.30 : GND
Voltage at anode of
D100 = 5.2 V?
Q100, D100, R108
are well-soldered?
Voltage across R108
is about 10~100mV?
0.7 < voltage(R109) < 1.3V?
Battery is charged?
Charging is
properly operating
Summary of Contents for B2050
Page 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Page 8: ... 7 2 PERFORMANCE ...
Page 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Page 10: ... 9 2 PERFORMANCE ...
Page 11: ... 10 2 PERFORMANCE ...
Page 12: ... 11 2 PERFORMANCE ...
Page 13: ... 12 2 PERFORMANCE ...
Page 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Page 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Page 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Page 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Page 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Page 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Page 97: ......
Page 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Page 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
Page 105: ......
Page 113: ...10 STAND ALONE TEST 112 ...
Page 117: ......
Page 119: ......
Page 132: ... 131 ...
Page 133: ... 132 ...