Circuit Flow
Input Level is Appear?
YES
NO
Vref 2.7~2.85V
OK?
NO
PAM Circuit is OK
See next page to check
Duplexer & Mobile SW
Check U102 Pin4
RF_IN
YES
Check U102 Pin2
V_REG
NO
Level is
OK?
YES
Check U102 Pin3
DCN:Vmode (0.7v~2.1v)
Check F102
Check Q100, U400
NO
Level is
3.4V~4.2V OK?
YES
Check U102 Pin5, 9, 10, 11
VCC1,2
Check U201
Replace U101
NO
Output Level
is Appear?
YES
Check U102 Pin12
RF_OUT
Replace U102
Waveform
U102 Pin4 DCN PAM_IN
U102 Pin12 DCN PAM_OUT
SPECTRUM ANALYZER CONDITION
-
RBW : 1MHz,VBW: 1KHz
-
Span : 60MHz
-
Frequency : DCN( 836.52MHz)
28
Z3X-BOX.COM
Содержание LG-MC2670
Страница 1: ...LGE LG Electronics Inc CDMA PORTABLE CELLULAR PHONE LG MC2670 SERVICE MANUAL Z 3 X B O X C O M ...
Страница 17: ...LG MC26 70 DCN Mode Graph 2 1 2 1763 04MHz DCN384 14 Z 3 X B O X C O M ...
Страница 21: ...LG MC2670 Waveform DP101 Pin 5 Graph 2 1 4 c DP101 Pin 8 Graph 2 1 4 b 18 Z 3 X B O X C O M ...
Страница 32: ...LG MC2670 Circuit Diagram 29 Z 3 X B O X C O M ...
Страница 33: ...LG MC2670 Figure 2 3 1 PMIC PM6610 FUNCTIONAL BLOCK DIAGRAM 2 3 Logic Part Trouble 30 Z 3 X B O X C O M ...
Страница 55: ...LG MC2670 Appendix Z 3 X B O X C O M ...
Страница 56: ...Z 3 X B O X C O M ...
Страница 58: ...Z 3 X B O X C O M TX Line RX Line Local Line RD2670 ...
Страница 59: ...Z 3 X B O X C O M TX Line RX Line MIC Line SPK Line RD2670 ...
Страница 60: ...Z 3 X B O X C O M RD2670 ...
Страница 61: ...Z 3 X B O X C O M SPK Line MIC Line RD2670 ...
Страница 65: ...Description LG Part No Q ty MAIN PCB SPFY0083001 1 2 PCB Z 3 X B O X C O M ...