LG Electronics Inc.
LG501C
Figure 4.2.2.5
Checking Flow
Waveform
Check if there is any major difference referring
To Figure 4.2.2.5. Is it similar?
Start
PAM circuit is OK. See next page
NO
Replace U1144
YES
whether it is higher than 3.4V.
Check Vcc line
NO
YES
whether it is lower than 0.5V.
Check PA_R1 line
NO
YES
whether it is higher than 2.2V.
Check PA_ON1 line
NO
YES
Check
TP2
pin 7, 8 at U1144
Check
TP3
pin 4 ,10 at U1144 (Vcc)
Check
TP5
pin2 at U 1144 (PA _RANGE)
Check
TP4
pin6 at U1144 (PA _ON0)
RF_IN fed up with CW signal
in low gain mode of PAM
RF_OUT
82
Содержание 501C
Страница 1: ...Internal Use Only Service Manual LG 501C Date January 2011 Issue 1 0 ...
Страница 21: ...LG Electronics Inc LG501C X XYUGj GutzpkG G GvrU XXUGj GtjjG G Gvr XWUGj G Gz Gj G G GvrU 21 ...
Страница 22: ...LG Electronics Inc LG501C X XZUGj G GptzpGtjjG G GvrU X UGj G GptzpGutzpkG G GvrU X UGj GwysGl G G Gvr 22 ...
Страница 25: ...LG Electronics Inc LG501C Y YZUGw GvrU Y UGw GvrU YYUGw GvrU 25 ...
Страница 26: ...LG Electronics Inc LG501C Y Y UGj Gz Gj Gp G G GvrUG Y UGj Gh Gv Gj G G GvrU Y UGj Gw Gt UGh G GvrU 26 ...
Страница 28: ...LG Electronics Inc LG501C Figure 1 1 Block Diagram of LG501C 28 ...
Страница 30: ...LG Electronics Inc LG501C 30 ...
Страница 31: ...LG Electronics Inc LG501C 31 ...
Страница 50: ...LG Electronics Inc LG501C Waveform U1801 2pin U1102 5pin U1102 1pin 50 ...
Страница 59: ...LG Electronics Inc LG501C Waveform 4 1 2 c 4 1 2 d U1801 2pin U1102 5pin U1102 2pin 59 ...
Страница 101: ...LG Electronics Inc LG501C 4 3 4 2 Receiver Trouble Test points D603 D604 TP1 CN6704 TP2 CN6704 101 ...
Страница 104: ...LG Electronics Inc LG501C Test points 4 3 4 3 MIC Trouble C2136B TP1 VA6701 TP2 C2134B TP3 MIC6701 104 ...
Страница 133: ...LG Electronics Inc LG501C Appendix 133 ...
Страница 134: ...LG Electronics Inc LG501C Appendix 1 Block Diagram LG501C BLOCK DIAGRAM 134 ...
Страница 135: ...LG Electronics Inc LG501C Appendix 2 Circuit diagram 135 ...
Страница 147: ...LG Electronics Inc LG501C 2 1 MAIN PCB CIRCUIT DIAGRAM Internal Use Only 147 ...
Страница 150: ...LG Electronics Inc LG501C Appendix 3 BGA Pin Map 150 ...
Страница 151: ...LG Electronics Inc LG501C 3 1 U7301B BCM2070B2KUBXG EUSY0418701 USED PIN NOT USED PIN 151 ...
Страница 152: ...LG Electronics Inc LG501C 3 2 U2101B QSC6055 CD EUSY0336202 NOT USED PIN 152 ...
Страница 153: ...LG Electronics Inc LG501C 3 3 U2201B H8BCS0SI0BAR 46M EUSY0347506 153 ...
Страница 154: ...LG Electronics Inc LG501C 3 4 U6481B TPA6136A2YFF EUSY0412501 USED PIN NOT USED PIN 154 ...
Страница 155: ...LG Electronics Inc LG501C Appendix 4 Component Layout 155 ...
Страница 162: ...LG Electronics Inc LG501C Appendix 7 Part List Circuit 5 IQV 8 78 8IZ 4Q 5 IQV 8 7 758IZ 4Q 162 ...