LG LG-MC2670 Page 71 Service Manual Download

Page: 71 / 74

5. The Bottom of Main PCB

NO Ref No

Discription

LG Part NO.

Maker Part NO

SPEC

1 C100

CAP,CHIP,MAKER

ECZH0000834C1005C0G1H3R3CT 3.3 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

2 C101

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

3 C102

CAP,CHIP,MAKER

ECZH0001201C1005Y5V1C104ZT

0.1 uF,16V ,Z ,Y5V ,HD ,1005 ,R/TP

4 C103

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

5 C104

CAP,TANTAL,CHIP

ECTH0003701TCSCM0J106MJAR

10 uF,6.3V ,M ,L_ESR ,1608 ,R/TP

6 C105

CAP,CHIP,MAKER

ECZH0000838C1005C0G1H470JT

47 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

7 C106

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

8 C107

CAP,CHIP,MAKER

ECZH0000804C1005C0G1H030CT 3 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

9 C109

CAP,CHIP,MAKER

ECZH0000804C1005C0G1H030CT 3 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

10 C111

CAP,CERAMIC,CHIP

ECCH0005704GRM40-052X5R475K14700000 pF,10V ,K ,X5R ,HD ,2012 ,R/TP

11 C114

CAP,CHIP,MAKER

ECZH0001123C1005X7R1H331KT

330 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

12 C115

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

13 C116

CAP,CHIP,MAKER

ECZH0001115C1005X7R1H222KT

2200 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

14 C118

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

15 C120

CAP,CHIP,MAKER

ECZH0001109C1005X7R1H102KT

1000 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

16 C122

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

17 C124

CAP,CHIP,MAKER

ECZH0000845C1005C0G1H820JT

82 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

18 C126

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

19 C127

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

20 C128

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

21 C129

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

22 C130

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

23 C131

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

24 C132

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

25 C134

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

26 C136

CAP,CHIP,MAKER

ECZH0000830C1005C0G1H330JT

33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

27 C137

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

28 C138

CAP,CHIP,MAKER

ECZH0001109C1005X7R1H102KT

1000 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

29 C139

CAP,CERAMIC,CHIP

ECCH0005704GRM40-052X5R475K14700000 pF,10V ,K ,X5R ,HD ,2012 ,R/TP

30 C140

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

31 C141

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

32 C142

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

33 C143

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

34 C144

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

35 C145

CAP,CHIP,MAKER

ECZH0001109C1005X7R1H102KT

1000 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

36 C146

CAP,CHIP,MAKER

ECZH0000826C1005C0G1H270JT

27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

37 C147

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

38 C148

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

39 C149

CAP,CERAMIC,CHIP

ECCH0001001C1005COG1H6R8DT 6.8 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

40 C150

CAP,CERAMIC,CHIP

ECCH0001001C1005COG1H6R8DT 6.8 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

41 C151

CAP,CHIP,MAKER

ECZH0001121C1005X7R1H471KT

470 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

42 C152

CAP,CHIP,MAKER

ECZH0001107C1005X7R1E562KT

5600 pF,25V ,K ,X7R ,HD ,1005 ,R/TP

43 C153

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

44 C155

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

45 C156

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

46 C157

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

47 C158

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

48 C159

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

49 C160

CAP,CHIP,MAKER

ECZH0000813C1005C0G1H101JT

100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

50 C161

CAP,CERAMIC,CHIP

ECCH0003002C2012JF1A106ZT

10 uF,10V ,Z ,Y5V ,HD ,2012 ,R/TP

51 C162

CAP,CHIP,MAKER

ECZH0001109C1005X7R1H102KT

1000 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

52 C163

CAP,CHIP,MAKER

ECZH0001104C1005X7R1C472KT

4700 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

53 C165

CAP,CHIP,MAKER

ECZH0001115C1005X7R1H222KT

2200 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

54 C166

CAP,CHIP,MAKER

ECZH0000826C1005C0G1H270JT

27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP

55 C167

CAP,CHIP,MAKER

ECZH0000846C1005C0G1H8R2CT 8.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

56 C168

CAP,CHIP,MAKER

ECZH0000846C1005C0G1H8R2CT 8.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP

57 C169

CAP,CHIP,MAKER

ECZH0000801C1005C0G1C221JT

220 pF,16V ,J ,NP0 ,TC ,1005 ,R/TP

58 C170

CAP,CHIP,MAKER

ECZH0000801C1005C0G1C221JT

220 pF,16V ,J ,NP0 ,TC ,1005 ,R/TP

59 C171

CAP,CHIP,MAKER

ECZH0001115C1005X7R1H222KT

2200 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

60 C172

CAP,CHIP,MAKER

ECZH0001103C1005X7R1C333KT

33 nF,16V ,K ,X7R ,HD ,1005 ,R/TP

61 C173

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

62 C174

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

63 C180

CAP,CHIP,MAKER

ECZH0001109C1005X7R1H102KT

1000 pF,50V ,K ,X7R ,HD ,1005 ,R/TP

64 C200

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

65 C201

CAP,CERAMIC,CHIP

ECCH0002102C2012JB1A684KT

0.68 uF,10V ,K ,NP0 ,TC ,2012 ,R/TP

66 C202

CAP,TANTAL,CHIP,MAKER

ECTZ0003701 TCSCS0J106MPAR

10 uF,6.3V ,M ,STD ,2012 ,R/TP

67 C203

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

68 C204

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

69 C205

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

70 C206

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

71 C207

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

72 C208

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

73 C209

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

74 C210

CAP,TANTAL,CHIP,MAKER

ECTZ0004603 TACL475M010RTA

10 uF,10V ,M ,STD ,1608 ,R/TP

75 C211

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

76 C212

CAP,CHIP,MAKER

ECZH0001101C1005X7R1C103KT

10000 pF,16V ,K ,X7R ,HD ,1005 ,R/TP

77 C213

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

78 C214

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

79 C215

CAP,CERAMIC,CHIP

ECCH0002001C1005JB0J104KT

100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP

Z3X-BOX.COM

Summary of Contents for LG-MC2670

Page 1: ...LGE LG Electronics Inc CDMA PORTABLE CELLULAR PHONE LG MC2670 SERVICE MANUAL Z 3 X B O X C O M ...

Page 2: ... included Mode Type Name Voltage Current Power CDMA RF3163 3 7V 450mA 0 263W 6 Functions of Major Semi Conductors Classification Function MSM6000 FBGA Operation control and digital signal processing of the mobile station FLASH MEMORY K8D3216UTC TI07 SRAM K1S161611A FI70 32M Dual Bank NOR Flash Memory 32Mbit Storing of the mobile station operation program 16M Random Access Memory 16Mbit RFT6122 RFR...

Page 3: ...eive Part 1 1 2 Digital Voice Processing Part 6 Chapter 2 Trouble Shooting 10 2 1 RX Trouble Shoot 10 2 2 TX Trouble Shoot 20 2 3 Logic Trouble Shoot 30 Chapter 3 Safety 49 Appendix 1 Assembly and Disassembly Diagram 2 Block Diagram 3 Circuit Diagram 4 Component Layout 5 Component List Z 3 X B O X C O M ...

Page 4: ...SM6000 Mobile Station Modem of the digital circuit part Then they are demodulated by the modulator demodulator In the case of transmission MSM6000 modulates interpolates and converts the digital signal into an analog baseband before sending it to the RFT6122 RFT6122 receives OQPSK modulated anlaog baseband signals from the MSM6000 s Tx part The RFT6122 upconverts the Tx analog baseband into RF The...

Page 5: ...characteristics The receive part BPF blocks the signals sent out from entering the receive end in order to improve sensitivity characteristics Insertion loss IL in the transmit band is 2 8dB Max whereas IL in the receive band is 2 1dB Max The receive band attenuation amount of transmit filter is 51dB Min and the transmit band attenuation amount of receive filter is 45dB or more Min 1 2 2 LNA U106 ...

Page 6: ...ation modes and band selection are specially controlled from the Mobile Station Modem MSM6000 The specification of RD2670 Mixers are described below Parameter High Gain Mode Low Gain Mode Unit Noise Figure 10 25 dB Input IP3 4 0 dBm Input IP2 56 30 dBm 1 3 Description of Transmit Part Circuit 1 3 1 Description on the Internal Circuit of MSM6000 U201 and RFT6122 U105 For the transmit data path Tx t...

Page 7: ...ed below Condition Min Typ Max Unit Rated Output Power Average CDMA Cellular 6 dBm Min Output Power Average CDMA Cellular 75 dBm Rx band noise power CDMA Cellular 132 dBm Hz ACPR Cellular Fc 885kHz Fc 1 98MHz 52 63 dBc dBc 1 3 2 Power Amplifier U102 The power amplifier that can be used in the CDMA mode has linear amplification capability For higher efficiency it is made up of one module Monolithic...

Page 8: ...requency synthesizer of UHF band Frequency stability depending on temperature is 2 0 ppm 1 4 2 Voltage Controlled Oscillator U106 The internal VCO signal of RFR6122 is processed by the LO generation and distribution circuits in RFR6122 to create Cellular quadrature downconverter s LO signals The LO signals applied at the mixer ports are at the frequency different than the VCO frequency This assure...

Page 9: ... signals amplifying parts for amplifying the voice signals and MIC signals are on Codec in MSM6000 2 2 3 MSM6000 Mobile Station Modem Part MSM6000 is the core elements of a CDMA mobile station and carries out the functions of CPU encoder interleaver deinterleaver Viterbi decoder Mod Demod codec and vocoder 2 2 4 Memory Part The memory part is made up of a flash memory and a SRAM 2 2 5 Power Supply...

Page 10: ... and Q data When received I and Q data are demodulated into symbols by the demodulator and then de interleaved in reverse to the case of transmission Then the errors of data received from Viterbi decoder are detected and corrected They are voice decoded at the vocoder in order to output digital voice data The MSM6000 also supports Enhanced Variable Rate Coder EVRC operation in addition to the stan...

Page 11: ...ices LDO in PMIC for 2 6V_RX part is enabled on SLEEP state and gives the power RX part devices Turn OFF When the PWR key is pressed during a few seconds PMIC is turned on by ON_SW and then Low is outputted on ON_SW_S MSM6000 receives this signal and then recognizes that the POWER key has been pressed During this time MSM6000 outputs PS_HOLD as low and turn off all devices Figure 1 2 Block Diagram...

Page 12: ...to store the program of the mobile station Using the down loading program the program can be changed even after the mobile station is fully assembled Pseudo RAM SDRAM is used to store the internal flag information call processing data and timer data KEYPAD For key recognition key matrix is setup using KEY_SENSE0 4_N signals and GPIO32 36 of output ports of MSM6000 Backlight circuitry are included ...

Page 13: ...PMIC Circuit 2 Check VCTCXO Circuit 3 Check Rx VCO 5 Check Duplexer Mobile SW 6 Check Rx I Q data Re download SW CAL 2 1 1 When Rx Power isn t enough Checking Flow Test Point Figure 2 1 1 2 1 Rx Part Trouble 1 2 3 4 5 PMIC Part VCTCXO RFR6000 Duplexer 4 Check Control Signal CHAPTER 2 Trouble Shooting CHAPTER 2 Trouble Shooting 10 Z 3 X B O X C O M ...

Page 14: ...rcuit Diagram Test Point Checking Flow Check Pin 31 of U400 2 85V_Rx OK No Pin 7 High No Changing Board PMIC Circuit is OK See next Page to check VCTCXO Replace U400 U400 31 2 85V_RX U400 7 High Figure 2 1 2 Check Pin 7 of U400 11 Z 3 X B O X C O M ...

Page 15: ...Check X100 Pin 3 Refer to Graph 4 1 a Check X100 Pin 4 Refer to Graph 4 1 b 19 2MHz OK 2 85V_TCXO OK No Yes VCTCXO Circuit is Ok See next Page to check Rx VCO Check Q701 No Yes Changing X100 X100 3 X100 4 Figure 2 1 3 Waveform Graph 2 1 1 a Graph 2 1 1 b U400 32 12 Z 3 X B O X C O M ...

Page 16: ... to Graph 4 2 Check U106 Pin 16 Check if the voltage is around 1 5V UHF_LO OK CP_RX OK No Yes Yes No Rx VCO is Ok See next Page to check Control Signal Check U105 Figure 2 1 4 Rx TEST SETUP HHP Test Channel 384 DCN Spectrum Analyzer Setting Oscilloscope Setting U106 18 UHF_LO_OUT U106 16 CP_RX Replace U106 13 Z 3 X B O X C O M ...

Page 17: ...LG MC26 70 DCN Mode Graph 2 1 2 1763 04MHz DCN384 14 Z 3 X B O X C O M ...

Page 18: ... Pin 3 4 5 Refer to Graph 4 3 a b Check SBDT SBCK SBST Check if there is Any Major Difference Refer to Graph 4 3 a b Level is High Similar Yes No Yes No Download the SW Download the SW Control Signal is Ok See next Page to check Duplexer Figure 4 5 SBDT SBCK SBCK SBST Graph 2 1 3 a Graph 2 1 3 b 15 Z 3 X B O X C O M ...

Page 19: ...LG MC26 70 2 1 6 Checking Mobile SW SP3T Duplexer DCN Test Point Circuit Diagram DP101 5 Figure 2 1 6 DP101 8 U100 1 DP101 8 16 Z 3 X B O X C O M ...

Page 20: ...al Detected Signal DCN Duplexer is Ok See next Page to check Rx I Q data Signal Check C101 Changing DP101 Check U100 Pin 1 Check if there is Any Major Difference Refer to Graph 4 4 a Check DP101 Pin 8 Check if there is Any Major Difference Refer to Graph 4 4 b Check DP101 Pin 5 Check if there is Any Major Difference Refer to Graph 4 4 c Yes No Yes No Waveform U100 Pin 1 Graph 2 1 4 a 17 Z 3 X B O ...

Page 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 ...

Page 22: ... U106 31 Rx_I_M U106 31 Rx_I_P U106 33 Rx_Q_P U106 30 Rx_I_M U106 34 Rx_Q_M Checking Flow Check U106 Pin 25 26 27 28 Check if there is Any Major Difference Refer to Graph 4 5 a b Similar Yes No Replace U106 Redownload the Software Calibrate Figure 2 1 7 Graph 2 1 5 a Graph 2 1 5 b 19 Z 3 X B O X C O M ...

Page 23: ...lect to CDMA TX on Power Amp On Set channel to 384 AGC 400 Spectrum analyzer setting Oscilloscope setting 1 Check Regulator PMIC Circuit 2 Check VCTCXO Circuit 3 Check SBI Control Signal 4 Check RFT6122 Circuit 7 Check Duplexer Mobile SW Circuit Re download SW CAL 6 Check PAM Circuit Mobile S W Duplexer PAM RFT6122 VCTCXO 20 Z 3 X B O X C O M ...

Page 24: ... 2 8V_MSMP 2 85V_TX_REG 4 2 Vbatt OK U201 Pin E14 TX ON High Replace U201 Replace U400 Regulator Circuit is OK See Next Page to Check VCTCXO Check Pin 4 13 16 29 U400 U201 YES YES NO NO U400 Pin 29 2 6V_Tx U400 Pin 16 2 8V_MSMP U400 Pin 4 4 2V_Vbatt U400 Pin 13 2 85V_TX_REG 21 Z 3 X B O X C O M ...

Page 25: ...Waveform Checking Flow Pin 3 19 2MHz OK VCTCXO Circuit is OK See next page to check SBI control signal YES NO Pin4 2 8V OK Replace X100 NO Check U400 X100 YES X100 Pin4 2 8V_TCXO X100 Pin3 MSM_VCTCXO_OUT X100 Pin3 VCTCXO_OUT X100 Pin4 2 85V_TCXO 22 Z 3 X B O X C O M ...

Page 26: ...rcuit Flow Level is appear YES NO Similar Waveform NO Control Signal is OK See next page to check RFT6122 Circuit Check Pin 1 2 32 YES Download the SW Download the SW Waveform U105 Pin 1 2 32 SBST SBDT SBCK SBDT SBCK SBCK SBST RFT6122 23 Z 3 X B O X C O M ...

Page 27: ...NO Level near 1V is Appear NO Control Signal is OK See next page to check PAM Circuit Check C169 C170 YES Check U201 Replace U105 Check U105 Pin12 NO Output signal CELL is Appear YES Check U105 Pin23 Replace U105 C169 C170 TX_I Q U105 Pin12 TX_CP U105 Pin23 CELL_OUT 24 Z 3 X B O X C O M ...

Page 28: ...LG MC2670 Circuit Diagram Waveform C169 C170 TX_I Q DATA U105 Pin23 DCN_OUT SPECTRUM ANALYZER CONDITION RBW 1MHz VBW 1KHz Span 60MHz Frequency DCN 836 52MHz 25 Z 3 X B O X C O M ...

Page 29: ...LG MC2670 2 2 5 Check PAM Circuit Test Point Circuit Diagram U102 Pin2 Vref 2 85V U102 Pin12 RF_OUT U102 Pin 5 9 10 11 Vcc1 2 U102 Pin3 Vmode 0 7 2 1V U102 Pin4 RF_IN 26 Z 3 X B O X C O M ...

Page 30: ...T Circuit Flow Level is Appear YES NO Level is Appear NO Re download SW and Recalibration Check DP101 Pin8 DUP_OUT YES Replace DP101 Replace U100 Check U100 Pin2 Duplexer DP101 Mobile S W DP101 PIN8 DP_out U100 PIN2 Mobile S W out 27 Z 3 X B O X C O M ...

Page 31: ... 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 Z 3 X B O X C O M ...

Page 32: ...LG MC2670 Circuit Diagram 29 Z 3 X B O X C O M ...

Page 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 ...

Page 34: ...circuit diagram Figure 2 3 3 PM6610 POWER MANAGEMENT SECTION R436 PS_HOLD 2 3 1 Power On Trouble C420 2 8V_MSMP C401 2 8V_TCXO C414 2 6V_MSMA C418 2 4V_MSMC R323 PWR_ON_SW Circuit Diagram U400 PMIC U201 MSM R406 2 6V_TX R445 2 6V_RX 31 Z 3 X B O X C O M ...

Page 35: ...here The Phone will power on Replace the main board Check the contact of power key or dome switch Push power on key and check the level change of U400 PWR_ON_SW high Check the voltage of the following port at U400 2 4V_MSMC 2 8V_MSMP 2 6V_MSMA 2 8V_TCXO 2 6V_RX 2 6V_TX Logic level at PS_HOLD of U201 High Does it work properly Does it work properly YES YES YES YES NO NO NO NO NO YES YES 32 Z 3 X B ...

Page 36: ...LG MC2670 2 3 2 Charging Trouble Test Points Figure 2 3 4 CHARGER CIRCUIT PART Block Diagram Figure 2 3 5 PM6610 CHARGING CONTROL BLOCK Circuit Diagram R416 U400 Q401 R413 33 Z 3 X B O X C O M ...

Page 37: ... adaptor TA is out of order Change the charging adaptor Voltage at Pin25 V_CHAR of CON301 5V YES NO YES NO Is the battery charged NO The battery may have the problem Change the battery and try again Charging will operate properly YES YES Does U400 and Q401 work Properly Change the U400 or Q401 NO Q401 R413 R416 well soldered Re Soldering Q401 R413 R416 YES 34 Z 3 X B O X C O M ...

Page 38: ...e Test Points Figure 2 3 6 RECEIVER PART Circuit Diagram Figure 2 3 7 RECEIVER PART Block Diagram Figure 2 3 8 RECEIVER CODEC BLOCK L407 L406 CON403 U401 U402 R422 R430 R423 Pin6 AUDIO_GAI N_SEL Pin4 IN Pin6 VBATT 35 Z 3 X B O X C O M ...

Page 39: ...Check the signal level at L406 407 Check the signal level at Pin4 of U401 Does U401 work properly Replace the MSM or Board Re soldering L406 L407 Replace the MSM Check the signal level of EAR10 at R422 R430 Re soldering or Replace the U402 Re soldering or Replace the U401 Speaker will work properly Yes Yes Yes Yes NO NO NO NO Check the soldering L406 L407 Yes Yes NO Voltage at Pin6 of U401 is over...

Page 40: ...LG MC2670 Test points Circuit Diagram Figure 2 3 10 MIC FILTER PART Figure 2 3 9 MIC BIAS PART Figure 2 3 11 MIC MIC FILTER 2 3 6 MIC Trouble U403 C450 C451 R440 MIC Filter 37 Z 3 X B O X C O M ...

Page 41: ... R440 Re solder R440 Replace MSM Check the signal level At each side of MIC Is It a few tens mVAC Replace the microphone Check the soldering of C450 C451 Re solder C450 C451 Check the soldering of MIC Filter Part Re solder MIC Filter part MIC will work properly Checking Flow Yes Yes Yes Yes No No No No No Yes 38 Z 3 X B O X C O M ...

Page 42: ...LG MC2670 2 3 7 Vibrator Troble Checking Flow Circuit Diagram Figure 2 3 13 VIBRATION CONTROL BLOCK Figure 2 3 12 Vibrator PART 4 7 R448 220 Q405 R448 R442 Q404 R446 4R7 D400 39 Z 3 X B O X C O M ...

Page 43: ... the voltage across D400 over 2 5V Is the voltage across R446 Under 3V Check the signal level at MSM_MOTOR_EN high Replace MSM Replace Vibrator Does Vibrator work Properly Yes No Check the soldering of Q404 R442 D400 Re soldering Q404 R442 D400 No Replace Q404 R442 D400 Yes Re soldering Q405 R446 R448 Check the soldering of Q405 R446 R448 No Replace Q405 R446 R448 Yes 40 Z 3 X B O X C O M ...

Page 44: ...LG MC2670 2 3 8 Key Backlight LED Trouble Test Points Figure 2 3 14 KEYPAD BACK LIGHT PART Figure 2 3 15 KEYPAD Back Light Circuit Q400 R410 MSM 41 Z 3 X B O X C O M ...

Page 45: ...400 R410 is working Charge or Change Battery and try again Check the soldering of each R or replace LEDs not working Check the condition of Q400 R410 If problem Change Q400 R410 No No No Yes Yes Yes BACKLIGHT WILL WORK PROPERLY Check the signal level at KEY_BACK_EN high Replace MSM No Yes 42 Z 3 X B O X C O M ...

Page 46: ...LG MC2670 2 3 9 Earphone Trouble Test Points Circuit Diagram Figure 2 3 16 EAR MIC JACK PART Figure 2 3 17 EAR MIC JACK PART CON401 C436 PIN4 PIN3 U404 C232 R207 R206 MSM U203 43 Z 3 X B O X C O M ...

Page 47: ... Audio path problem Can you hear your voice from the earphone Change Earphone Set the audio part of the test equipment to continuous wave mode Earphone receiving Path problem Can you hear the sound from the earphone Earphone sending path problem 1 4 2 3 Yes No Yes No Earphone receiving path problem 2 Level of C436 is about 1 2V Check soldering of Pin 3 of CON401 Change main board Download S W Re s...

Page 48: ...older U404 Replace U404 4 Yes 5 Earphone sending path problem Earphone detect problem Earphone sending path problem 3 Level pin4 of CON401 is about 1 6V Level of C232 is About a few tens or hundreds VAC Re solder R206 R207 Re solder C232 Does it work well Re download software Does it work well 4 Change main board No No Yes Yes Yes Yes No No No No Yes Yes No 45 Z 3 X B O X C O M ...

Page 49: ...LG MC2670 2 3 10 LCD Trouble Figure 2 3 18 LCD CONNECTOR PART Test Points Circuit Diagram Figure 2 3 19 LCD CONNECTOR VR1 VR2 CON304 L301 R340 Q300 U202 46 Z 3 X B O X C O M ...

Page 50: ...R2 R340 No Does VR1 VR2 R340 Work Properly Change the Main Board Yes Check the Control signal D 0 7 LCD_RESET LCD_RS LCD_CS LWR Check the CON304 Soldering No Re Soldering CON304 No Does LCD work properly Check voltages at each point of Capacitor Change the LCD Module Yes 1 38V 6 65V 10 4V 1 38V 1 38V 2 78V 4 07V 9 19V 0 97V 1 93V 6 71V 7 69V 8 65V 47 Z 3 X B O X C O M ...

Page 51: ...D300 303 R309 311 R314 Does Q300 work Properly No Yes Re soldering or Replace LED300 3003 R309 311 R314 Yes No Re Soldering or Replace Q300 Check the signal level at LCD_BACK_EN high Replace MSM No Yes LCD backlight will work properly 48 Z 3 X B O X C O M ...

Page 52: ...2 ANSI Standard for safety levels with respect to human exposure to RF energy Over 120 scientists engineers and physicians from universities government health agencies and industry after reviewing the available boy of research developed this updated Standard In March 1993 the US Federal Communications Commission FCC proposed the adoption of this updated Standard The design of your phone complies w...

Page 53: ...ttention to the driving Use hands free operation if available and pull off the road and park before making or answering a call if driving conditions require Electronic Devices Most modem electronic equipment is shielded from RF energy However RF energy from cellular telephones may affect inadequately shielded electronic equipment RF energy may effect improperly installed or inadequately shielded e...

Page 54: ...ive atmosphere It is rare but your phone or accessories could generate sparks Sparks in such area could cause an explosion or fire resulting in bodily injury or even death Areas with a potentially explosive atmosphere are often but not always clearly marked They include fueling areas such as gas station below deck on boats fuel or chemical transfer or storage facilities areas where the air contain...

Page 55: ...LG MC2670 Appendix Z 3 X B O X C O M ...

Page 56: ...Z 3 X B O X C O M ...

Page 57: ...2 8 V MSMC_2 8 V TX_REG_2 85 V MSMA_2 6V RX _2 6 V TX_2 6 V PM6610 PMIC U400 SBI LNA 856302 F103 Loss 2 0dB DSA535SB X100 19 20M PM6610 Buffer RF3163 826243 F102 Loss 2 4dB EFSD836MD2S2 DP101 824 849MHz Loss 1 6dB 869 894MHz Loss 2 0dB TX_AGC_ADJ DAC_IREF Quadrature Up converter LO Generaion Distribution SBI Control Circuit TX_ON SBCK SBST SBDT Gain Control Circuit ctls TX VCO RX PLL Logic LOOP FI...

Page 58: ...Z 3 X B O X C O M TX Line RX Line Local Line RD2670 ...

Page 59: ...Z 3 X B O X C O M TX Line RX Line MIC Line SPK Line RD2670 ...

Page 60: ...Z 3 X B O X C O M RD2670 ...

Page 61: ...Z 3 X B O X C O M SPK Line MIC Line RD2670 ...

Page 62: ...The Top of Main PCB MC2670 U403 MIC Pad MIC doesn t work CON304 LCD Connector No LCD Display CON403 Speaker Connector No Audio Sound Z 3 X B O X C O M ...

Page 63: ...nector No service Can t make a call F102 DCN TX SAW Filter Can t make a call Low TX power U400 Power Management IC Can t power on Power isn t supplied to each block Unable to charge U106 RFR6122 No service Bad sensitivity F103 DCN RX SAW Filter No service Bad sensitivity U401 Audio Amplifier No ringtion Small ringtone volume U102 DCN PAM Can t make a call Low TX power U105 RFT6122 Can t make a cal...

Page 64: ...BB0233501 LG MC2670 Slim manual 2 COVER BATTERY MCJA0040401 3 BATTERY PACK LI ION SBPL0076501 3 7 V 800 mAh 1 CELL PRISMATIC LGIP A800 English 4 ADAPTOR AC DC SSAD0020501 100 240V 5060 Hz 5 V 1 A CE AC DC ADAPTOR For Europe 1 Accessory Z 3 X B O X C O M ...

Page 65: ...Description LG Part No Q ty MAIN PCB SPFY0083001 1 2 PCB Z 3 X B O X C O M ...

Page 66: ... ASSY METAL ADCA0026801 3 2 MIDZ00 INSULATOR MIDZ0054101 1 3 MIDZ01 INSULATOR MIDZ0057801 1 4 MPBH00 PAD MIKE MPBH0012001 1 5 MSAZ00 SHEET MSAZ0027301 1 6 SUMY00 MICROPHONE SUMY0004901 1 OB4 15L42 C33SD FPCB 42 dB 4 15 7 SVLY00 LCD SVLY0024101 1 ES50573FP 120 64 33 61 41 23 3 0 Mono STN ST7565 3 4 PACKAGE APAY0044814 NO Ref No Discription LG Part NO Qty Maker Part NO SPEC 1 BSBY00 SILICAGEL BSBY00...

Page 67: ...2 MCCF00 CAP MOBILE SWITCH MCCF0028701 1 3 MKAZ00 KEYPAD MKAZ0025501 1 4 MLAA00 LABEL APPROVAL MLAA0002505 1 ULCP_App Label Z 3 X B O X C O M ...

Page 68: ... VARISTOR SEVY0003601 ICVL0505101V150FR 5 6 V SMD 100pF 1005 79 VR1 VARISTOR SEVY0007001 ICVE31186E150R101FR 18 V SMD 6ch 100ohm EMI Filter Array chip varistor 80 VR2 VARISTOR SEVY0007001 ICVE31186E150R101FR 18 V SMD 6ch 100ohm EMI Filter Array chip varistor Z 3 X B O X C O M ...

Page 69: ...D CHIP EDLH0009401 SSC YG104 YELLOW GREEN 1608 R TP 37 LED406 DIODE LED CHIP EDLH0009401 SSC YG104 YELLOW GREEN 1608 R TP 38 LED407 DIODE LED CHIP EDLH0009401 SSC YG104 YELLOW GREEN 1608 R TP 39 LED408 DIODE LED CHIP EDLH0009401 SSC YG104 YELLOW GREEN 1608 R TP 40 LED409 DIODE LED CHIP EDLH0009401 SSC YG104 YELLOW GREEN 1608 R TP 41 Q402 TR BJT NPN EQBN0007601 KTC4075E SOT 23 0 15 W R TP EMT3 42 Q...

Page 70: ... VARISTOR SEVY0003601 ICVL0505101V150FR 5 6 V SMD 100pF 1005 79 VR1 VARISTOR SEVY0007001 ICVE31186E150R101FR 18 V SMD 6ch 100ohm EMI Filter Array chip varistor 80 VR2 VARISTOR SEVY0007001 ICVE31186E150R101FR 18 V SMD 6ch 100ohm EMI Filter Array chip varistor Z 3 X B O X C O M ...

Page 71: ...49 CAP CERAMIC CHIP ECCH0001001C1005COG1H6R8DT 6 8 pF 50V C NP0 TC 1005 R TP 40 C150 CAP CERAMIC CHIP ECCH0001001C1005COG1H6R8DT 6 8 pF 50V C NP0 TC 1005 R TP 41 C151 CAP CHIP MAKER ECZH0001121C1005X7R1H471KT 470 pF 50V K X7R HD 1005 R TP 42 C152 CAP CHIP MAKER ECZH0001107C1005X7R1E562KT 5600 pF 25V K X7R HD 1005 R TP 43 C153 CAP CHIP MAKER ECZH0001101C1005X7R1C103KT 10000 pF 16V K X7R HD 1005 R T...

Page 72: ... CHIP MAKER ECZH0002910GRM36COG100D50PT10 pF 50V D NP0 TC 1005 R TP 123 C414 CAP CHIP MAKER ECZH0001418C1608X5R0J475KT 4 7 uF 6 3V K X5R HD 1608 R TP 124 C415 CAP CERAMIC CHIP ECCH0002001C1005JB0J104KT 100000 pF 6 3V K B HD 1005 R TP 125 C416 CAP CHIP MAKER ECZH0001511C1608Y5V1A225ZT 2 2 uF 10V Z Y5V HD 1608 R TP 126 C417 CAP CHIP MAKER ECZH0000813C1005C0G1H101JT 100 pF 50V J NP0 TC 1005 R TP 127 ...

Page 73: ...ZSF1001 1000 ohm 1 16W F 1005 R TP 206 R127 RES CHIP ERHY0003301MCR01MZSJ101 100 ohm 1 16W J 1005 R TP 207 R128 RES CHIP MAKER ERHZ0003203MCR01MZSF1132 11 3 Kohm 1 16W F 1005 R TP 208 R129 RES CHIP MAKER ERHZ0000293MCR01MZSF5100 510 ohm 1 16W F 1005 R TP 209 R130 RES CHIP MAKER ERHZ0000434MCR01MZSJ1R0 1 ohm 1 16W J 1005 R TP 210 R131 RES CHIP MAKER ERHZ0003202MCR01MZSF5761 5 76 Kohm 1 16W F 1005 R...

Page 74: ...F 1005 R TP 273 R427 RES CHIP MAKER ERHZ0000203MCR01MZSF1002 10 Kohm 1 16W F 1005 R TP 274 R429 RES CHIP MAKER ERHZ0000445MCR01MZSJ224 220 Kohm 1 16W J 1005 R TP 275 R430 RES CHIP MAKER ERHZ0000231MCR01MZSF1803 180 Kohm 1 16W F 1005 R TP 276 R431 RES CHIP MAKER ERHZ0000237MCR01MZSF2002 20 Kohm 1 16W F 1005 R TP 277 R434 RES CHIP MAKER ERHZ0000231MCR01MZSF1803 180 Kohm 1 16W F 1005 R TP 278 R435 RE...

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