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(1) Checking Regulator Circuit
4. TROUBLE SHOOTING
- 50 -
U403. 5
(OUT)
U403. 3
(EN)
U403
Regulator Circuit is OK
See next Page to check
VCTCXO
Voltage at
Pin5 of U403
Is 2.85V?
Level at
Pin3 of U403
Is high?
YES
NO
Replace U403
YES
NO
Change main board
RF2V85
VBAT
0.01u
C445
R419
100K
C444
1u
4
BYP
EN
3
GND
2
1
IN
5
OUT
MIC5255-2.85BM5
U403
C446
4.7u
CLKON
TEST POINT
CIRCUIT
CHECKING FLOW
Figure 4-2 (a). Regulator Circuit
Figure 4-2 (b). Regulator Circuit
Содержание KG240
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model KG245 Service Manual KG245 ...
Страница 3: ... 4 ...
Страница 81: ...4 TROUBLE SHOOTING 82 4 13 KEY backlight Trouble TEST POINT Figure 4 20 a KEY Backlight Trouble ...
Страница 90: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Download Procedure 5 2 1 Computer Program file MultiGSM exe Click ...
Страница 92: ...5 DOWNLOAD AND CALIBRATION 93 5 2 3 Configuration Setting C GSMULTI Model MG210 dll ...
Страница 93: ...5 DOWNLOAD AND CALIBRATION 94 5 2 4 Press Start Button KG245 ...
Страница 94: ...5 DOWNLOAD AND CALIBRATION 95 5 2 5 After Start Button Which Stand by condition KG245 ...
Страница 95: ...5 DOWNLOAD AND CALIBRATION 96 5 2 6 SW downloading Condition KG245 ...
Страница 96: ...5 DOWNLOAD AND CALIBRATION 97 5 2 7 SW downloading END Condition KG245 ...
Страница 99: ...5 DOWNLOAD AND CALIBRATION 100 4 Click on CALIBRATION START button KG245 KG245 ...
Страница 100: ...5 DOWNLOAD AND CALIBRATION 101 6 BLOCK DIAGRAM ...
Страница 101: ... 102 ...
Страница 110: ... 111 8 PCB LAYOUT ...
Страница 111: ... 112 8 PCB LAYOUT ...
Страница 112: ... 113 KG245 8 PCB LAYOUT ...
Страница 113: ... 114 KG245 8 PCB LAYOUT ...
Страница 121: ...10 STAND ALONE TEST 122 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 125: ... 126 ...
Страница 127: ... 128 ...
Страница 145: ...Note ...
Страница 146: ...Note ...