LG -MC2670 Service Manual
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LG -MC2670 Service Manual

LG -MC2670 Service Manual

Cdma portable cellular phone
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CDMA PORTABLE CELLULAR PHONE
LG-MC2670
SERVICE MANUAL
LGE
LG Electronics Inc.

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Summary of Contents for LG LG-MC2670

  • Page 1 CDMA PORTABLE CELLULAR PHONE LG-MC2670 SERVICE MANUAL LG Electronics Inc.
  • Page 2 Features of Mobile Subscriber Radio Handset (LG-MC2670 Type) 1. Wave Type • Digital : G7W 2. Frequency Scope • Send Frequency : 824.025~843.985MHz • Receive Frequency : 869.025~888.985MHz 3. Rated Output • Digital : 0.263W 4. Output Conversion Method : This is possible by correcting the key board channel.

  • Page 3: Table Of Contents

    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 LG Electronics Inc.

  • Page 4: Chapter 1. Circuit Discription

    LG-MC2670 CHAPTER 1. Circuit Description 1. RF Transmit/Receive Part 1.1 Overview The RF transmit/receive part employs the direct conversion architecture (ZIF, Zero Intermediate Frequency). The transmit/receive frequency is respectively 824.04~848.97MHz and 869.04~893.97 MHz. The block diagram is shown in [Figure 1-1].
  • Page 5 LG-MC2670 [Figure 1-1] Block Diagram Of MC2670 1.2 Description of Receive Part Circuit 1.2.1 Duplexer (DP101) The duplexer consists of the receive part bandpass filter (BPF) and the transmit part bandpass filter (BPF) which have the function of separating transmit/receive signals in the full duplex system using the transmit/receive common antenna.
  • Page 6 LG-MC2670 Parameter Gain Mode 0(G0) Gain Mode 1(G1) Gain Mode 2(G2) Gain Mode 3(G3) Unit Gain Noise Figure Input IP3 1.2.3 Rx RF SAW FILTER (F103) The main function of Rx RF SAW filter is to attenuate mobile phone spurious frequency, attenuate noise amplified by the LNA and suppress second harmonic originating in the LNA.
  • Page 7 LG-MC2670 programmable PLL for generating Tx and Rx LO frequency, cellular driver amplifier and Tx power control through an 85 dB VGA. As added benefit, the single sideband upconversion eliminates the need for a band-pass filter normally required between the upconverter and driver amplifier.
  • Page 8 LG-MC2670 1.4 Description of Frequency Synthesizer Circuit 1.4.1 Voltage Controlled Temperature Compensation Crystal Oscillator (X100) The temperature range that can be compensated by VC-TCXO which is the reference frequency generator of a mobile station is -30~+80 ° C. VC-TCXO receives frequency tuning signals called TRK_LO_ADJ from MSM6000 as 0.5V~2.5V DC via R and C filters in order to generate the reference frequency of 19.20MHz and input it into the...

  • Page 9: Digital/Voice Processing Part

    LG-MC2670 2. Digital/Voice Processing Part 2.1 Overview The digital/voice processing part processes the user's commands and processes all the digital and voice signal processing in order to operate in the phone. The digital/voice processing part is made up of a keypad/LCD, receptacle part, voice processing part, mobile station modem part, memory part, and power supply part.
  • Page 10 LG-MC2670 Receptacle(CON301) exchanges audio signals and data with external sources and then, receives power from the battery or external batteries. 2.3.2 MSM Part MSM6000 is the core element of a CDMA mobile station. Subsystems within the MSM6000 include a CDMA...
  • Page 11 LG-MC2670 2.3.4 Power Supply Part Turn ON When the battery voltage (4.2V ~ 3.3V) is fed and the PWR key of keypad is pressed, PMIC is activated by the ON_SW signal, and then the control signal ON_SW_S/ signal is generated. And then, the regurator 2.4V_MSMC &...
  • Page 12 LG-MC2670 CPU : ARM7TDMI microprocessor core MEMORY : • FLASH Memory : 32M bits (K8D3216UTC-TI07) • SRAM : 16M bits (K1S161611A-FI70) ARM7TDMI 32-bit microprocessor is used and CPU controls all the circuitry. Some of the features of the ARM microprocessor include a 3 stage pipelined RISC architecture, both 32-bit ARM and 16bit THUMB instruction setsm, a 32-bit address bus, and a 32-bit internal data bus.

  • Page 13: Chapter 2. Trouble Shooting

    LG-MC26 70 CHAPTER 2. Trouble Shooting CHAPTER 2. Trouble Shooting 2.1 Rx Part Trouble 2.1.1 When Rx Power isn’t enough Test Point RFR6000 PMIC Part Duplexer VCTCXO Figure 2.1.1 Checking Flow START Rx TEST SETUP(HHP) - Test Channel : 384...
  • Page 14 LG-MC26 70 2.1.2 Checking Regulator Circuit Test Point U400. 7 High U400. 31 (+2.85V_RX) Figure 2.1.2 Circuit Diagram Checking Flow Check Pin 7 of U400 Check Pin 31 +2.85V_Rx OK? Pin 7. High? Changing Board of U400 PMIC Circuit is OK See...
  • Page 15 LG-MC26 70 2.1.3 Checking VCTCXO Circuit Test Point Checking Flow X100. 4 X100. 3 Check X100 Pin 3 ◆ Refer to Graph 4-1(a) U400. 32 VCTCXO Circuit is Ok 19.2MHz OK? See next Page to check Rx VCO Check X100 Pin 4 ◆...
  • Page 16 LG-MC26 70 2.1.4 Checking Rx VCO Signal Test Point U106.16 (CP_RX) U106.18 (UHF_LO_OUT) Figure 2.1.4 Checking Flow Rx TEST SETUP(HHP) - Test Channel : 384(DCN) Spectrum Analyzer Setting Oscilloscope Setting Check U106 Pin 18 Rx VCO is Ok Check if there is...
  • Page 17 LG-MC26 70 1763.04MHz @ DCN384 DCN Mode Graph 2.1.2...
  • Page 18 LG-MC26 70 2.1.5 Checking Control Signal Test Point U106. 5 (SBST) U106. 4 (SBCK) U106. 3 (SBDT) Figure 4-5 Checking Flow Check Pin 3, 4, 5 Download the SW Level is High? ◆ Refer to Graph 4-3(a,b) Check SBDT, SBCK SBST...
  • Page 19 LG-MC26 70 2.1.6 Checking Mobile SW & SP3T & Duplexer(DCN) Test Point DP101. 5 DP101. 8 DP101. 8 U100. 1 Figure 2.1.6 Circuit Diagram...
  • Page 20 LG-MC26 70 Checking Flow Rx TEST SETUP(HHP) - Test Channel : 384(DCN) E5515C Setup - CH : 384(DCN) - Sector Power : -30 dBm Spectrum Analyzer Setting Oscilloscope Setting Check U100 Pin 1 Check if there is Changing U100 Detected Signal? Any Major Difference ◆...
  • Page 21 LG-MC2670 Waveform DP101 Pin 8 Graph 2.1.4(b) DP101 Pin 5 Graph 2.1.4(c)
  • Page 22 LG-MC2670 2.1.7 Checking Rx I/Q data Test Point U106. 31 (Rx_I_M) U106. 30 (Rx_I_P) U106. 33 (Rx_Q_M) U106. 34 (Rx_Q_P) Figure 2.1.7 Waveform U106. 31 (Rx_I_P) U106. 30 (Rx_I_M) U106. 33 (Rx_Q_P) U106. 34 (Rx_Q_M) Graph 2.1.5(b) Graph 2.1.5(a) Checking Flow...

  • Page 23: Tx Trouble Shoot

    LG-MC2670 2.2 Tx Trouble Test Point Duplexer VCTCXO Mobile RFT6122 Checking Flow START √ Connect the phone to UART connector √ Press H/W or F7, then click ‘offline-d’ -Click ‘Band select‘ to CDMA & TX on &Power Amp 4. Check RFT6122 Circuit -Set channel to 384 &...
  • Page 24 LG-MC2670 2.2.1 Check Regulator(PMIC) Circuit TEST POINT U400 Pin 16 U400 Pin 13 (+2.8V_MSMP) (+2.85V_TX_REG) U400 Pin 4 (+4.2V_Vbatt) U400 Pin 29 (+2.6V_Tx) Circuit Diagram Checking Flow U400 U201 +2.6V_TX +2.8V_MSMP Check Pin U201 Pin E14 +2.85V_TX_REG Replace U201 4, 13, 16, 29 TX ON High? +4.2 Vbatt...
  • Page 25 LG-MC2670 2.2.2 Check VCTCXO Circuit TEST POINT Checking Flow X100 X100 Pin4 (+2.8V_TCXO) Pin 3 VCTCXO Circuit is OK 19.2MHz OK? See next page to check SBI control signal Pin4 Replace X100 2.8V OK? X100 Pin3 Check U400 (MSM_VCTCXO_OUT) Circuit Diagram Waveform X100 Pin4 +2.85V_TCXO...
  • Page 26 LG-MC2670 2.2.3 Check SBI Control Signal Test Point RFT6122 U105 Pin 1, 2, 32 (SBST,SBDT,SBCK) Circuit Flow Download the SW Check Pin 1,2,32 Level is appear? Similar Waveform? Download the SW Control Signal is OK See next page to check...
  • Page 27 LG-MC2670 2.2.4 Check RFT6100 Circuit Test Point U105 Pin12 (TX_CP) C169,C170 (TX_I, Q) U105 Pin23 (CELL_OUT) Circuit Flow Check C169,C170 Check U201 I,Q Level is Appear? Replace U105 Check U105 Pin12 Level (near 1V) is Appear? Output signal Check U105 Pin23...
  • Page 28 LG-MC2670 Circuit Diagram SPECTRUM ANALYZER CONDITION Waveform -RBW : 1MHz,VBW: 1KHz -Span : 60MHz -Frequency : DCN( 836.52MHz) C169,C170 TX_I,Q DATA U105 Pin23 DCN_OUT...
  • Page 29 LG-MC2670 2.2.5 Check PAM Circuit Test Point U102 Pin 5, 9, 10,11 (Vcc1,2) U102 Pin12 (RF_OUT) U102 Pin3 (Vmode 0.7~2.1V) U102 Pin4 U102 Pin2 (RF_IN) (Vref +2.85V) Circuit Diagram...
  • Page 30 LG-MC2670 2.2.6 Check Duplexer & Mobile SW TEST POINT Duplexer DP101 PIN8 DP101 DP_out U100 PIN2 Mobile S/W out Mobile S/W Circuit Flow Check DP101 Pin8 Replace DP101 Level is Appear? DUP_OUT Level is Appear? Check U100 Pin2 Replace U100...
  • Page 31 LG-MC2670 Circuit Flow Check U102 Pin4 Input Level is Appear? Check F102 RF_IN Check U102 Pin2 Vref 2.7~2.85V Check Q100, U400 V_REG Check U102 Pin3 Level is DCN:Vmode (0.7v~2.1v) Check U201 Check U102 Pin5, 9, 10, 11 Level is Replace U101 VCC1,2 3.4V~4.2V OK?
  • Page 32 LG-MC2670 Circuit Diagram...

  • Page 33: Logic Trouble Shoot

    LG-MC2670 2.3 Logic Part Trouble Figure 2.3.1 PMIC(PM6610) FUNCTIONAL BLOCK DIAGRAM...
  • Page 34 LG-MC2670 2.3.1 Power On Trouble Circuit Diagram Figure 2.3.2 Power Management circuit diagram Test Points C420(+2.8V_MSMP) C418(+2.4V_MSMC) C414(+2.6V_MSMA) R323(PWR_ON_SW) U400 PMIC C401(+2.8V_TCXO) R406(+2.6V_TX) R445(+2.6V_RX) U201(MSM) R436(PS_HOLD) Figure 2.3.3 PM6610 POWER MANAGEMENT SECTION...
  • Page 35 LG-MC2670 Checking Flow START Check Battery Voltage Charge of Change Battery and try again > 3.2V ? Push power-on key and check Check the contact of power-key the level change of or dome switch U400 PWR_ON_SW high? Check the voltage of the following port at U400 +2.4V_MSMC...
  • Page 36 LG-MC2670 2.3.2 Charging Trouble Test Points Block Diagram R416 Q401 U400 R413 Figure 2.3.4 CHARGER CIRCUIT PART Circuit Diagram Figure 2.3.5 PM6610 CHARGING CONTROL BLOCK...
  • Page 37 LG-MC2670 Checking Flow SETTING : Connect the battery and the charging adaptor (TA) to the phone START Charging Connector Re-soldering CON301 CON301 Well-soldered? Voltage at The charging adaptor (TA) is out of order. Pin25(V_CHAR) Change the charging adaptor. of CON301 = 5V?
  • Page 38 LG-MC2670 2.3.3 Audio AMP Trouble Pin4 Test Points (-IN) Pin6 U401 (+VBATT) CON403 Pin6 (AUDIO_GAI U402 N_SEL) L407 L406 R422 R430 R423 Figure 2.3.6 RECEIVER PART Circuit Diagram Figure 2.3.7 RECEIVER PART Block Diagram Figure 2.3.8 RECEIVER CODEC BLOCK...
  • Page 39 LG-MC2670 Checking Flow SETTING : “Ringers” at Sounds menu START Voltage at Pin6 of Change main board. U401 is over Internal pattern is opened 3.4~4.2V? Check the contact of speaker or Does Speaker work Properly? Replace the speaker Check the...
  • Page 40 LG-MC2670 2.3.6 MIC Trouble Test points C450 MIC Filter C451 U403 R440 Figure 2.3.9 MIC & BIAS PART Figure 2.3.10 MIC FILTER PART Circuit Diagram Figure 2.3.11 MIC & MIC FILTER...
  • Page 41 LG-MC2670 Checking Flow SETTING : After initialize 5515C, Test US Cellular START Voltage at R440 = 1.2V? Check the soldering Re-solder R440 (MIC BIAS Voltage Check) Of R440 Replace MSM Check the signal level Replace the microphone At each side of MIC. Is...
  • Page 42 LG-MC2670 2.3.7 Vibrator Troble Checking Flow R442 Q404 R446 Q405 R448 D400 Figure 2.3.12 Vibrator PART Circuit Diagram R448 Figure 2.3.13 VIBRATION CONTROL BLOCK...
  • Page 43 LG-MC2670 Checking Flow SETTING : “Vibrator on” at Sounds of test menu START Check the state of Re-contact vibrator Contact of Vibrator Does Vibrator work Properly? Replace Vibrator Is the voltage across D400 Check the soldering of Re-soldering Q404, R442, D400 over 2.5V?
  • Page 44 LG-MC2670 2.3.8 Key Backlight LED Trouble Test Points R410 Q400 Figure 2.3.14 KEYPAD BACK LIGHT PART Figure 2.3.15 KEYPAD Back Light Circuit...
  • Page 45 LG-MC2670 Checking Flow START Is the voltage level VBATT Charge or Change Battery and try again (R446, R442)3.2-4.2V? Are all LEDs LED400~409 Check the soldering of each R or working? replace LEDs not working Check the condition of Q400, R410.
  • Page 46 LG-MC2670 2.3.9 Earphone Trouble Test Points R206 C436 U203 PIN3 R207 CON401 C232 U404 PIN4 Figure 2.3.16 EAR MIC JACK PART Circuit Diagram Figure 2.3.17 EAR MIC JACK PART...
  • Page 47 LG-MC2670 Checking Flow SETTING : After initialize 5515C, Test US Cellular START Insert the earphone to the handset. Earphone detect problem Does the audio Profile of the phone change to the earphone mode? Audio path problem Set the audio part of the test...
  • Page 48 LG-MC2670 Earphone detect problem Earphone detect problem Level of pin 4 of CON401 Level of R206, R207 about 1.6V? about 2.4V? Re-soldering R206, R207 Check soldering Re-solder U404 U404 Check working Replace U404 U404 Earphone sending path problem Earphone sending...
  • Page 49 LG-MC2670 2.3.10 LCD Trouble Test Points U202 CON304 Q300 VR1 VR2 L301 R340 Figure 2.3.18 LCD CONNECTOR PART Circuit Diagram Figure 2.3.19 LCD CONNECTOR...
  • Page 50 LG-MC2670 Checking Flow : LCD START Check L301, L404 Voltage Re-Soldering L301, L404 (MSMP)= 2.8V ? Check the Re-Soldering CON304 CON304 Soldering 2.78V 4.07V 10.4V 1.38V 0.97V 9.19V 1.38V 1.93V 6.71V 7.69V 8.65V 1.38V 6.65V Does LCD work properly? Check voltages at each Change the LCD Module point of Capacitor.
  • Page 51 LG-MC2670 Checking Flow : Back Light START Check the LED300:303 Re-soldering or Replace R309:311, R314 LED300:3003, R309:311, R314 Re-Soldering or Does Q300 work Properly? Replace Q300 Check the signal level at Replace MSM LCD_BACK_EN=high? LCD backlight will work properly...

  • Page 52: Chapter 3. Safety

    LG-MC2670 CHAPTER 3. Safety ▣ IMPORTANT Read This Information Before Using Your Hand-Held Portable Cellular Telephone First introduction in 1984, the hand-held portable cellular telephone is one of the most exciting and innovative electronic products ever developed. With it you can stay in contact with your office, your home, emergency service, and others. For the safe and efficient operation of your phone, observe these guidelines.
  • Page 53 LG-MC2670 Do not hold the antenna when the phone is “IN USE”. Holding the antenna affects call quality and may cause the phone to operated at a higher power level than needed. ▣ Antenna Care and Replacement Do not use the phone with a damaged antenna. If a damaged antenna comes into contact with skin, a minor bum may result.
  • Page 54 LG-MC2670 ▣ Aircraft Turn your phone OFF before boarding any aircraft. Use it on the ground only with crew permission. Do not use it in the air. To prevent possible interference with aircraft systems, US Federal Aviation Administration (FAA) regulations require you to have permission from a crew member to use your phone while the plane is on the ground.

  • Page 55: Appendix

    LG-MC2670 Appendix...
  • Page 57 MC26 0 Block Diagram MSM6000 (15X15) / U201 RFT6122 (5X5) / U105 826243 ATTN TX_AGC_ADJ R111,113,116 F102 824 ~ 849 MHz TX_I Loss=-2dB Loss=2.4dB -50 ~ +23 dBm RAM&ROM Quadrature TX_I/ TX DACs Up-converter TX_Q U102 ARM7TDMI TX_Q/ LCD Display LO Generaion V ref=2.8V RF3163...
  • Page 58 RD2670 TX Line RX Line Local Line...
  • Page 59 RD2670 TX Line RX Line MIC Line SPK Line...
  • Page 60 RD2670...
  • Page 61 RD2670 SPK Line MIC Line...
  • Page 62 The Top of Main PCB (MC26 0) U403 CON304 CON403 MIC Pad LCD Connector Speaker Connector MIC doesn’t work No LCD Display No Audio Sound...
  • Page 63 The Bottom of Main PCB (MC26 0) CON400 DP101 F103 U400 U401 Vibrator Connector Duplexer DCN RX SAW Filter Power Management IC Audio Amplifier Vibrator doesn’t work Can’t make a call Can’t power on No service No ringtion Power isn’t supplied Bad sensitivity Bad sensitivity Small ringtone volume...
  • Page 64 1. Accessory Discription LG Part NO SPEC 1 MANUAL,OPERATION MMBB0233501 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...
  • Page 65 2. PCB Description LG Part No Q'ty MAIN PCB SPFY0083001...
  • Page 66 3. Mechanical Part 3.1 COVER ASSY, FRONT (ACGK0059901) Discription LG Part NO. SPEC Ref No Maker Part NO 1 MCJK00 COVER,FRONT MCJK0049101 2 MFBC00 FILTER,SPEAKER MFBC0018201 3 MFBD00 FILTER,MIKE MFBD0012601 4 MIAA00 INDICATOR,LED MIAA0016501 5 MICD00 INSERT,BAR MICD0000301 6 MPBG00...
  • Page 67 2 MCCF00 CAP,MOBILE SWITCH MCCF0028701 3 MKAZ00 KEYPAD MKAZ0025501 4 MLAA00 LABEL,APPROVAL MLAA0002505 ULCP_App Label...
  • Page 68 77 R448 RES,CHIP ERHY0003501 MCR01MZSJ221 220 ohm,1/16W ,J ,1005 ,R/TP 78 R449 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...
  • Page 69 4. The Top of Main PCB Discription LG Part NO. SPEC Ref No Maker Part NO 1 C300 VARISTOR SEVY0004201 ICVS0514X350FR 14 V, ,SMD ,120pF, 1005 2 C301 VARISTOR SEVY0004201 ICVS0514X350FR 14 V, ,SMD ,120pF, 1005 3 C302 VARISTOR SEVY0004201...
  • Page 70 77 R448 RES,CHIP ERHY0003501 MCR01MZSJ221 220 ohm,1/16W ,J ,1005 ,R/TP 78 R449 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...
  • Page 71 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...
  • Page 72 80 C217 CAP,CHIP,MAKER ECZH0001125C1005X7R1C223KT 0.022 uF,16V ,K ,X7R ,HD ,1005 ,R/TP 81 C218 CAP,CERAMIC,CHIP ECCH0002001C1005JB0J104KT 100000 pF,6.3V ,K ,B ,HD ,1005 ,R/TP 82 C220 CAP,CHIP,MAKER ECZH0001202C1005Y5V1C223ZT 0.022 uF,16V ,Z ,Y5V ,HD ,1005 ,R/TP 83 C228 CAP,CHIP,MAKER ECZH0003121GRM36X7R683K10PT 68 nF,10V ,K ,X7R ,HD ,1005 ,R/TP 84 C230 CAP,CERAMIC,CHIP ECCH0003002C2012JF1A106ZT...
  • Page 73 164 F102 FILTER,SAW SFSY0017501 856243 836.5 MHz,2x1.5x0.76 ,SMD , 165 F103 FILTER,SAW SFSY0023201 856302 881.5 MHz,2.0*1.5*0.84 ,SMD , 166 L102 INDUCTOR,CHIP ELCH0001423LL1005-FHL56NJ 56 nH,J ,1005 ,R/TP ,PBFREE 167 L103 INDUCTOR,CHIP ELCH0001406LL1005-FHL4N7S 4.7 nH,S ,1005 ,R/TP ,PBFREE 168 L104 INDUCTOR,CHIP ELCH0003525LMC1608T-1N6J 1.6 nH,J ,1608 ,R/TP , 169 L107 INDUCTOR,CHIP...
  • Page 74 248 R354 RES,CHIP,MAKER ERHZ0000484MCR01MZSJ471 470 ohm,1/16W ,J ,1005 ,R/TP 249 R355 RES,CHIP,MAKER ERHZ0000484MCR01MZSJ471 470 ohm,1/16W ,J ,1005 ,R/TP 250 R356 RES,CHIP,MAKER ERHZ0000484MCR01MZSJ471 470 ohm,1/16W ,J ,1005 ,R/TP 251 R357 RES,CHIP,MAKER ERHZ0000464MCR01MZSJ331 330 ohm,1/16W ,J ,1005 ,R/TP 252 R358 RES,CHIP,MAKER ERHZ0000484MCR01MZSJ471 470 ohm,1/16W ,J ,1005 ,R/TP 253 R359 RES,CHIP,MAKER...

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