4. TROUBLE SHOOTING
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4.10 SIM Detect Trouble
USB Initial sequence of U890 is :
VREG_USIM_2.85V(C432 of PM6650-2) go to 3.0V -> USIM_CLK,USIM_RST,USIM_DATA
triggered -> USIM IF work(Schematic and place are refer to SIM technical brief)
Start
Work well?
VREG_USIM_2.85V is 3.0V?
USIM_P_CLK is run?
Change the Main board
End
Check J300,
TP206,TP207,
VREG_USIM_2.85V
Yes
No
YES
NO
Re-insert the SIM card
Change SIM card
Work well?
End
Yes
No
USIM_P_DATA
(J300 Pin 6)
VREG_USIM_2.85V(J300 Pin 1)
USIM_P_CLK
(J300 Pin 3)
USIM_P_RST
(J300 Pin 2)
Summary of Contents for U890
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model U890 U890c Service Manual U890 U890c ...
Page 3: ... 4 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram ...
Page 70: ...4 TROUBLE SHOOTING 71 4 2 SIGNAL PATH ...
Page 109: ...4 TROUBLE SHOOTING 110 CN600 50pin LCD connector CN901 C907 C911 FB901 FB902 ...
Page 115: ...4 TROUBLE SHOOTING 116 C226 C227 for MIC serial capacitor ...
Page 118: ...4 TROUBLE SHOOTING 119 Q400 Q401 Q402 VBATT GND ...
Page 139: ...Table 2 1 1 RF Block Component 6 BLOCK DIAGRAM 140 ...
Page 140: ...6 BLOCK DIAGRAM 141 6 2 Interface Diagram U890 Interface Diagram ...
Page 142: ...6 BLOCK DIAGRAM 143 Top Side ...
Page 143: ...6 BLOCK DIAGRAM 144 Bottom Side ...
Page 152: ... 153 8 pcb layout ...
Page 153: ... 154 8 pcb layout ...
Page 154: ... 155 8 pcb layout ...
Page 155: ... 156 8 pcb layout ...
Page 156: ... 157 8 pcb layout ...
Page 157: ... 158 8 pcb layout ...
Page 163: ...9 CALIBRATION 164 9 3 HOT KIMCHI Example Choose_U890 ...
Page 164: ...9 CALIBRATION 165 Click APPLY button Click START button ...
Page 165: ...9 CALIBRATION 166 Click Run button to lunch RF AUTOTEST ...
Page 167: ... 168 ...
Page 191: ...Note ...
Page 192: ...Note ...