4. TROUBLE SHOOTING
- 78 -
4.5.1 Checking VCXO Block
Refer to 3.3
4.5.2 Checking Ant. SW module
Refer to 3.4
4.5.3 Checking RF TX Level
TP1
TP2
TP3
TP4
Test Point (RF TX Level)
10nH
L100
C102
33p
18
19
GND6
12
RX_DCS1
RX_DCS2
13
16
RX_EGSM1
RX_EGSM2
17
14
RX_PCS1
RX_PCS2
15
TX_DCSPCS
3
TX_EGSM
1
8
UMTS
D1040
U100
7
ANT
2
CTRL1
4
CTRL2
CTRL3
11
20
CTRL4
GND1
5
6
GND2
GND3
9
10
GND4
GND5
ANT100
NA
C101
SW100
KMS-512
ANT
G1
G2
RF
ANT102
C100
6.8p
ANT_SEL2
ANT_SEL0
ANT_SEL1
TP1
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 ...