4. TROUBLE SHOOTING
- 54 -
4.3 Power On Trouble
Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from EGV
TEST POINT
CIRCUIT
(1608)
(1608)
(16V,K,X5R)
R101
22K
2V85_VSIM
C115
2.2u
VD1
BAT100
1V5_VRF0
C114
6.8K
R100
220n
3V2_VBUF
1u
1u
C110
C108
VBAT
2V85_VSIM
VRF1
W_LED_FBN
J12
W_LED_FBP
J14
XO
A8
A9
XOX
R6
R7
VDD_SIM
G15
VREFP
VSS1
B8
VSS2
B9
VDDP_MEM
VDD_LANA
K15
VDD_LBUF
J13
G12
VDD_LD1
VDD_LIO
J10
K10
VDD_LMEM
B11
VDD_LRF1V5
VDD_LRF2V5
F15
VDD_LRTC
K12
VDD_LSIM
M11
VDD_MAIN1
G9
VDD_MAIN2
J7
G10
VDD_PLL
VDD_RTC
H13
VBAT_1
VBAT_2
F12
H15
VBAT_3
VBAT_4
H14
F6
VDDP_IO
L4
D12
REXT
IREF
G13
AGND
G14
2V8_VIO
C112
1u
C106
1u
2V0_VRTC
2V8_VIO
1u
C113
2V8_VMEM
C111
1u
2V0_VRTC
1u
C109
2V5_VANA
2V8_VMEM
2.2u
18nH
L102
C101
1u
C107
VD1
LDO
VOLTAGE
PART
V_IO
2.8V
C107
V_BUF
3.2V
C101
V_MEM
2.8V
C109
V_ANA
2.5V
C113
V_SIM
2.85V
C108
VRF0
1.5V
C110
C106
C107
C111
C110
C109
C101
EGV
IC
26Mhz
Содержание KG271
Страница 1: ...Date June 2007 Issue 1 0 Service Manual Model KG271 KG276 Service Manual KG271 KG276 ...
Страница 3: ... 4 ...
Страница 81: ...5 DOWNLOAD 82 5 DOWNLOAD 5 1 Download Setup Configure system like figure 5 1 Figure 9 1 Download Setup ...
Страница 87: ... 88 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Страница 92: ... 93 8 PCB LAYOUT ...
Страница 93: ... 94 8 PCB LAYOUT ...
Страница 104: ... 105 10 CALIBRATION 10 2 3 Click SETTING Memu 10 2 4 Setup Ezlooks menu such as the following fugure KG278 ...
Страница 106: ...10 CALIBRATION 107 10 2 7 Select MODEL 10 2 8 Click START for RF calibration 10 2 9 RF Calibration finish KG278 ...
Страница 107: ...10 CALIBRATION 108 10 2 10 Calibration data will be saved to the following folder ...
Страница 113: ... 114 ...
Страница 125: ...Note ...
Страница 126: ...Note ...