
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Checking Regulator Circuit (Rx pass continued)
Checking Points
Checking Flow
LDO Circuit Diagram
Waveform
U403
PIN6
(RF_EN)
PIN3
(RF2,85V)
PIN1
(VBAT)
RF2.85V
VBAT
1
3
VOUT
R1114D281D-TR-F
U403
CE
6
2
GND1
5
GND2
4
NC
VDD
1u
C441
C440
1u
C442
1u
RF_EN
Check Pin 1
3.4 ~ 4.2 V ?
Check Battery
No
Yes
Pin 6 High ?
Check DBB[U101]
No
Yes
Replace Regulator
[U403]
No
Pin 3
2.85V ?
Regulator Circuit is OK.
See next page to check
VCTCXO Circuit.
Yes
≡
Paging Period 5
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Summary of Contents for MG210
Page 1: ...Date May 2006 Issue 1 0 Service Manual MG210 Service Manual Model MG210 Z 3 X B O X C O M ...
Page 3: ... 2 Z 3 X B O X C O M ...
Page 5: ...Z 3 X B O X C O M ...
Page 32: ...3 H W Circuit Description 31 Figure 14 Power Supply Scheme Z 3 X B O X C O M ...
Page 45: ...4 2 KEYPAD Components Placement 4 TROUBLE SHOOTING 44 U301 MIC200 Z 3 X B O X C O M ...
Page 87: ...4 TROUBLE SHOOTING 86 Waveform PA_ON VRAMP Z 3 X B O X C O M ...
Page 93: ...5 DOWNLOAD 92 5 2 3 Configuration Setting C GSMULTI Model MG210 dll Z 3 X B O X C O M ...
Page 94: ...5 DOWNLOAD 93 5 2 4 Press Start Button MG210 Z 3 X B O X C O M ...
Page 95: ...5 DOWNLOAD 94 5 2 5 After Start Button Which Stand by condition MG210 Z 3 X B O X C O M ...
Page 96: ...5 DOWNLOAD 95 5 2 6 SW downloading Condition MG210 Z 3 X B O X C O M ...
Page 97: ...5 DOWNLOAD 96 5 2 7 SW downloading END Condition MG210 Z 3 X B O X C O M ...
Page 101: ... 100 Z 3 X B O X C O M ...
Page 106: ... 105 8 pcb layout Z 3 X B O X C O M ...
Page 107: ... 106 8 pcb layout Z 3 X B O X C O M ...
Page 111: ... 110 Z 3 X B O X C O M ...
Page 126: ...Note Z 3 X B O X C O M ...
Page 127: ...Note Z 3 X B O X C O M ...