4. TROUBLE SHOOTING
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Check 1. Crystal part
If you already check this crystal part, you can skip check 1.
Test Point (Crystal Part)
Schematic of the Crystal Part
TP2
TP3
TP1
TP5
TP4
100
R126
GND
2
OUT
3
4
VCC
1
VCONT
TG-5001LA-19.2MHz
X100
19.2MHz
C163
0.1u
0.01u
C172
1000p
C173
1000p
C157
1000p
C162
C177
100p
VREG_TCXO_2.85V
TCXO_BT_IN
TCXO_PM
TRK_LO_ADJ
TP3
TP1
TP2
TP5
TP4
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 ...