LG Electronics Inc.
LG501C
CHAPTER 4. Trouble Shooting
4.1 Rx Part Trouble
4.1.1 DCN Rx
Test Point
Check flow
1. Check
DC Power Supply circuit
2. Check
VCTCXO
Rx TEST SETUP (HHP)
- Tes t Channel: 384
- Tes t Band : US Cellular
- SID :
- Sect or Power: - 30 dB m Spec trum An alyzer Setting
Os c illos c op e Setting
Start
3. Check
RF Signal path
Redownload S/W, Cal
1320
Mobile S/W
Quadplexer
VCTCXO
QSC6055
42
Summary of Contents for 501C
Page 1: ...Internal Use Only Service Manual LG 501C Date January 2011 Issue 1 0 ...
Page 21: ...LG Electronics Inc LG501C X XYUGj GutzpkG G GvrU XXUGj GtjjG G Gvr XWUGj G Gz Gj G G GvrU 21 ...
Page 25: ...LG Electronics Inc LG501C Y YZUGw GvrU Y UGw GvrU YYUGw GvrU 25 ...
Page 28: ...LG Electronics Inc LG501C Figure 1 1 Block Diagram of LG501C 28 ...
Page 30: ...LG Electronics Inc LG501C 30 ...
Page 31: ...LG Electronics Inc LG501C 31 ...
Page 50: ...LG Electronics Inc LG501C Waveform U1801 2pin U1102 5pin U1102 1pin 50 ...
Page 59: ...LG Electronics Inc LG501C Waveform 4 1 2 c 4 1 2 d U1801 2pin U1102 5pin U1102 2pin 59 ...
Page 133: ...LG Electronics Inc LG501C Appendix 133 ...
Page 134: ...LG Electronics Inc LG501C Appendix 1 Block Diagram LG501C BLOCK DIAGRAM 134 ...
Page 135: ...LG Electronics Inc LG501C Appendix 2 Circuit diagram 135 ...
Page 147: ...LG Electronics Inc LG501C 2 1 MAIN PCB CIRCUIT DIAGRAM Internal Use Only 147 ...
Page 150: ...LG Electronics Inc LG501C Appendix 3 BGA Pin Map 150 ...
Page 151: ...LG Electronics Inc LG501C 3 1 U7301B BCM2070B2KUBXG EUSY0418701 USED PIN NOT USED PIN 151 ...
Page 152: ...LG Electronics Inc LG501C 3 2 U2101B QSC6055 CD EUSY0336202 NOT USED PIN 152 ...
Page 153: ...LG Electronics Inc LG501C 3 3 U2201B H8BCS0SI0BAR 46M EUSY0347506 153 ...
Page 154: ...LG Electronics Inc LG501C 3 4 U6481B TPA6136A2YFF EUSY0412501 USED PIN NOT USED PIN 154 ...
Page 155: ...LG Electronics Inc LG501C Appendix 4 Component Layout 155 ...