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LG CM4330 Service Manual
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LG CM4330 Service Manual

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See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
Mini Hi-Fi System
SERVICE MANUAL
MODEL: CM4330
(CM4330, CMS4330F)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P
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A
F
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7
6
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3
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72
MARCH
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1
3

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  • Page 1 Internal Use Only Website http://biz.lgservice.com Mini Hi-Fi System SERVICE MANUAL MODEL: CM4330 (CM4330, CMS4330F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. MARCH...
  • Page 2 CONTENTS SECTION 1 ..GENERAL SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ........................1-3 ESD PRECAUTIONS ..........................1-5 HIDDEN KEY MODE ........................... 1-6 SERVICE INFORMATION FOR EEPROM ..................1-7 PROGRAM DOWNLOAD & UPDATE GUIDE ................... 1-8 1. AUDIO PROGRAM ........................... 1-8 2. CD PROGRAM ............................1-9 3.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.

  • Page 5: Opt2

    NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 6: Esd Precautions

    ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 7: Hidden Key Mode

    HIDDEN KEY MODE Push both Front key and RCU key to activate it for 5 seconds. 1. Disc Lock On/Off (CD Function Only Active) Front Key : STOP RCU Key : STOP 2. Check Version and Option code Front Key : STOP RCU Key : PLAY/PAUSE You can change [Audio MCU Version <->...

  • Page 8: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status or AUX status. Remote control ‘Fwd skip’ + Front ‘STOP’ DETECT NEW EEPROM push same timing during 5 seconds. (OPTION EDIT SCREEN) NAME OPT0 FLD ‘OP-0…. OPT1 OPT2 OPT3 OPT4 Move to appropriate position and OPT5 make changes with remote control...

  • Page 9: Program Download & Update Guide

    PROGRAM DOWNLOAD & UPDATE GUIDE 1. AUDIO PROGRAM Download program file name must be CM4530_***.HEX If security program (Water Wall) is activated on your PC, you must save the file to the USB storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the USB device, change to the other function, nor power off the device.

  • Page 10: Cd Program

    2. CD PROGRAM Download program file name must be HF000_CM4530_xxxxxxxx_xx.bin Tip) With B/T : HF000_CM4530_xxxxxxxx_xx.bin Without B/T : HF400_CM4530_xxxxxxxx_xx.bin If security program (Water Wall) is activated on your PC, you must save the file to the USB storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the USB device, change to the other function, nor power off the device.

  • Page 11: Eq Program

    3. EQ PROGRAM Download program file name must be EQ_PRG_CM4530_***.BIN If security program (Water Wall) is activated on your PC, you must save the file to the USB storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the USB device, change to the other function, nor power off the device.

  • Page 12: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to the main label. Power consumption Refer to the main label. Dimensions (W x H x D) 202 x 307 x 315 mm Net Weight (Approx.) 3.15 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 % Bus Power Supply...
  • Page 13 MEMO 1-12...
  • Page 14 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................. 2-3 1. CABINET AND MAIN FRAME SECTION (CM4330) ................2-3 2. MECHANISM DECK SECTION (DP-12AM) ..................... 2-5 3. PACKING ACCESSORY SECTION ......................2-7 4. SPEAKER SECTION ..........................2-8...
  • Page 15 MEMO...

  • Page 16: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (CM4330) NOTES) THE EXCLAMATION POINT WITHIN AN 260L EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SMPS FRONT 260R CABLE2 MAIN...

  • Page 17: Mechanism Deck Section (Dp-12Am)

    MEMO 2. MECHANISM DECK SECTION (DP-12AM) 015B 015A 012A...

  • Page 18: Packing Accessory Section

    3. PACKING ACCESSORY SECTION 824 AM Loop Antenna 801 Instruction Ass'y 900 Remote Control 808 Battery 910 Remocon Battery Cover 825 FM Wire Antenna 803 Packing 804 Bag 803 Packing 802 Box...

  • Page 19: Speaker Section

    4. SPEAKER SECTION 4-1. FRONT SPEAKER (CMS4330F)
  • Page 20 SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ........................3-2 1. NO POWER ............................3-2 2. NO BOOTING WHEN POWER ON THE SET ..................3-4 3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ..............3-5 4. NO OPERATION OF MD ........................3-6 5.

  • Page 21: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. NO POWER If the unit doesn’t work by no power problem, repair the set according to the following guide. 1-1. FUSE & BRIDGE DIODE 1-1-1. Solution Please check and replace F901, BD901, TH901 on SMPS board. 1-1-2.
  • Page 22 ONE POINT REPAIR GUIDE NO POWER If the unit doesn’t work by no power problem, repair the set according to the following guide. 1-2. D929 1-2-1. Solution Please check and replace D929 on SMPS board. 1-2-2. How to troubleshoot (Countermeasure) 1) Check the Anode-Cathod Voltage of D929 with a digital multi-meter, it is normally 0.2 ~ 0.3 V.

  • Page 23: No Booting When Power On The Set

    ONE POINT REPAIR GUIDE 2. NO BOOTING WHEN POWER ON THE SET The set doesn’t work when press the power button on the front board or the remote control. 2-1. FLASH MEMORY 2-1-1. Solution Please check and replace IC102 on MAIN board. 2-1-2.

  • Page 24: Vfd Is Not Displayed When Power On The Set

    ONE POINT REPAIR GUIDE 3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET When power on the set, any icons or characters on VFD are not displayed. 3-1. VFD 3-1-1. Solution Please check and replace DIG502 on FRONT board. 3-1-2.
  • Page 25 ONE POINT REPAIR GUIDE 4. NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SPINDLE MOTOR among them.

  • Page 26: No Operation Of Md

    ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SLED MOTOR among them.
  • Page 27 ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the TRAY OPEN / CLOSE MOTOR among them.
  • Page 28 ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER TRACKING ACTUATOR.
  • Page 29 ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER FOCUSING ACTUATOR.
  • Page 30 ONE POINT REPAIR GUIDE 5. NO SOUND There is no sound output in the CD FUNCTION, repair the set according to the follow- ing guide. 5-1. IN THE CD FUNCTION 5-1-1. Solution Please check and replace IC601, IC801 on MAIN board. 5-1-2.

  • Page 31: No Sound

    ONE POINT REPAIR GUIDE NO SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide. 5-2. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS) 5-2-1. Solution Please check and replace IC701, IC702 on MAIN board. 5-2-2.
  • Page 32 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the USB FUNCTION, repair the set according to the fol- lowing guide. 5-3. IN THE USB FUNCTION 5-3-1. Solution Please check and replace IC801 on MAIN board & IC502 on USB board. 5-3-2.
  • Page 33 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the AUX FUNCTION, repair the set according to the fol- lowing guide. 5-4. IN THE AUX FUNCTION 5-4-1. Solution Please check and replace IC401 on MAIN board. 5-4-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC401 (Pin7, 8).
  • Page 34 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the TUNER FUNCTION, repair the set according to the following guide. 5-5. IN THE TUNER FUNCTION 5-5-1. Solution Please check and replace IC401, TU100 on MAIN board. 5-5-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from Pin1,3 of TU100 to IC401(Pin23, 24).

  • Page 35: Audio Electrical Troubleshooting Guide

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 1. POWER (SMPS) No 3.7 VA F901 normal? Replace F901 (Use the same fuse). BD901 normal? Replace BD901. TH901 normal? Replace TH901. Is Vcc (10 V ~ 18 V) supplied to D904 normal? IC901 Pin7? Check or replace D904. D922 normal? Replace D922.
  • Page 36 AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE No PVDD F901 normal? Replace F901 (Use the same fuse). BD901 normal? Replace BD901. TH901(TH902) normal? Replace TH901. Is Vcc (10 V ~ 18 V) supplied to D905 normal? IC902 Pin7? Check or replace D905. Q910 base "H"? •...
  • Page 37 AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE No 12 V Is Vcc Check or replace D921. (15 V) supplied to Q953 collector? Is the Check P-CTRL “H” signal 13 V Supplied to Q953 from μ-COM. base? Check or replace Q953. No 5 V Is Vcc Check or replace D923.
  • Page 38 AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE No VFD Check or replace D925. D925 normal? Check or replace ZD951. ZD951 normal? Q951 normal? Check or replace Q951. Check or replace VFD. 3-19...

  • Page 39: Μ-Com Part Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 2. μ-COM PART CHECK μ-COM PART CHECK Check if Refer to voltage of CN105 Pin10 SMPS troubleshooting. is 3.7 VA. Check Check if output of both end voltage of D103 is 3.7 V. D102, D103. Check if IC101_Pin49 and Check D102, D103.

  • Page 40: Fld Display Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 4. FLD DISPLAY CHECK FLD DISPLAY CHECK Check CN105 Pin1,2,3 input Refer to SMPS troubleshooting. voltage. Check if both end voltage of FL+, FL- are over 2.9 V VKK : over 25.6 V. Check CN501 connection and power Check CN501 connection.

  • Page 41: Pwm Modulation Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 5. PWM MODULATION CHECK PWM MODULATION PART CHECK Check Refer to CN105 Pin11 3.7 VA. SMPS troubleshooting. • Check IC601(TAS5548) VDD 3.3 V • Check VDD Core 1.2 V. Check Check X602 X602(19.2 MHz) Replace X602(19.2 MHz). (19.2 MHz).
  • Page 42 AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE Check Check IC601(PS9854) Refer to CD Assy communication input data CD troubleshooting. Pin4, 5, 6. Pin4, 5, 6 PWM wave. Check Check each line IC601(PS9854) input resistor output. data. Check Check modulator output Replace IC601(PS9854). IC601(PS9854). FL: Pin26(-),27(+) FR: Pin28(-),29(+) and others.

  • Page 43: Power Amp Part Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 6. POWER AMP PART CHECK POWER AMP PART CHECK Check CN105 Pin6: +12 V Refer to SMPS troubleshooting. Pin14,15: 26 V. Check IC701, IC702 Pin29, 30, 31, 36, 37, 38 input voltage. Check IC701, IC702 Check each line resistor output voltage. Pin2: +12 V input.

  • Page 44: Tuner / Aux Function Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 7. TUNER / AUX FUNCTION CHECK FUNCTION CHECK Check IC401 (CS5346) Pin7, 8, Check JK401,TU100. 23, 24 input. Check IC401 Check IC401 Check CN105 Pin7: +5 V Pin5: +5 V (CS5346) Pin9 output Pin9, 10: +3.3 V. Pin46: +3.3 V.

  • Page 45: Tuner Function Check

    AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE 8. TUNER FUNCTION CHECK TUNER FUNCTION CHECK Check tuner Check tuner module voltage module(TU100) (Pin4: +3.3 V). operation. Check IC102 Pin21, 22, 23, 24, 25 data in/output. Check tuner module data. Refer to function check. 3-26...

  • Page 46: Cdp Electrical Troubleshooting Guide

    CDP ELECTRICAL TROUBLESHOOTIHG GUIDE 1. CD FUNCTION CD FUNCTION Can the Is Motor_open/close Is load +,- ok? disc insert? OK? (IC301 Pin10,11) Check IC301. Is Motor ok? Check loading motor. (about 12 Ω) Focus/ Check IC301 IM driving (Focus and Disc reading tracking/sled signal (Motor drive IC).

  • Page 47: Double Usb Function (Optional Part)

    CDP ELECTRICAL TROUBLESHOOTIHG GUIDE 2. DOUBLE USB FUNCTION (OPTIONAL PART) USB FUNCTION Plug-in usb device. Display “NO USB”. Check USB_5V. Check CN502. Check USB_D+/D- Display “READ”. Check usb jack (JK501/ JK502). (R501,R502). Display “NO FILE”. Check IC801(Pin116, 117). Replace IC801. Check usb audio fi...

  • Page 48: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. SDRAM IC802 Pin38 DATA IC802 Pin53 ADDRESS IC802 Pin35 IC803 Pin1 2. SERVO IC801 Pin62 CD-16M 3-29...
  • Page 49 IC302 Pin61 IC302 Pin62 IC302 Pin13 IC302 Pin63 3. AUDIO PATH CD_BCK IC801 Pin101 IC801 Pin103 CD_LRCK CD_DATA IC801 Pin102 3-30...
  • Page 50 DAC_MCLK IC801 Pin84 DAC_BCK IC801 Pin85 DAC_LRCK IC801 Pin86 DAC_DATA IC801 Pin81 4. USB USB_5V IC801 Pin117 IC801 Pin118 3-31...
  • Page 51 MEMO 3-32...

  • Page 52: Wiring Diagram

    WIRING DIAGRAM SPK TERMINAL JACK 1 CD MD SMPS PCB MAIN PCB : Harness FRONT PCB : FFC 3-33 3-34...

  • Page 53: Block Diagrams

    IC601 TUNER_RST/CE/DAT/CLK LC87Fxx96A TAS5548 TUNER TUNER_L/R IC702 ADC_RST/CLK/DAT AMP IC 200Wx1 TAS5612LA Optional DAC_DATA SPEANA SPI: MICOM_CS/D O/DI/CLK MAIN_RESET CM4330 Single USB DAC BCK/LRCK CM4430/4530/4630 Dual USB OP_SW,CL_SW USB2 USB_HUB_D USB HUB P/UP USB1 USB2512 MOT_MUTE/CLOSE/OPEN USB_HUB_Res IC301 S3053 SLED...

  • Page 54: Smps Block Diagram

    2. SMPS BLOCK DIAGRAM SMPS Snubber Block On/Off 5V LDO 5.6VA CN901 Main SMPS IC Regulation Block On/Off Block 3.7VA Noise Y-Cap Feedback Filter Photo coupler Block (X-cap P.CTL Y-Cap Photo coupler On/Off Line Filter) Snubber Block PVDD SMPS IC With FET Feedback Block...

  • Page 55: Audio Path Block Diagram

    3. AUDIO PATH BLOCK DIAGRAM FR,FL TAS5612LA 150Wx2 12.288MHZ DAC_LRCK DAC_BCK A_TUNER TAS5548 DAC_MCLK Tuner CS5346 DAC_LRCK (SLAVE) DAC_BCK Woofer Aux in TAS5612LA A_AUX 200Wx1 Optional AMP Block LRCK ADC_DATA 74AHC244 DATA CD_BCK BX8805 CD_LRCK (128 PIN) MAIN BU9543KV CD_DATA Block 12MHZ 244_CTRL1/CTRL2...

  • Page 56: Main Power Diagram

    4. MAIN POWER DIAGRAM RESET +3.7VA MICOM PWR_SENSE KIA7027AF 3.3V EEPROM TJ3965D P_CTRL VCC33 VCC33 BU9543KV VCC15 VCC33 BX8805 VCC12 LM1117-1.2V VCC33 TAS5548 VCC33 BT module VCC33 SDRAM VCC33 FLASH VCC33 TUNER VCC33 PICKUP VCC33 74HCT244 VCC33 CS5346 VCC18 S3053 3-41 3-42...

  • Page 57: Front/ Amp Power Diagram

    5. FRONT/ AMP POWER DIAGRAM FROM_MAIN to Front +3.7VA MC3401 VKK/FL-+ USB1 LM37102-ADJ 5.6VA USB_5V USB2 USB_5V Optional Part FROM_SMPS to AMP TAS5612LA PVDD 3-43 3-44...

  • Page 58: Circuit Diagrams

    MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE LG CORPORATION. ALL COMPONENTS PERFORMANCE IMPROVEMENT CHANGES INTO SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 59: Main - Dsp Circuit Diagram

    2. MAIN - DSP CIRCUIT DIAGRAM 11 12 : WAVEFORM NUMBER EAX64991602_0.1.0_Main_SD_1 2013.02.04 3-47 3-48...

  • Page 60: Main - Micom/ Adc Circuit Diagram

    3. MAIN - MICOM/ ADC CIRCUIT DIAGRAM MICOM & ADC EAX64991602_0.1.0_Main_SD_2 2013.02.04 3-49 3-50...

  • Page 61: Main - Amp Circuit Diagram

    4. MAIN - AMP CIRCUIT DIAGRAM EAX64991602_0.1.0_Main_SD_3 2013.02.04 3-51 3-52...

  • Page 62: Main - Rf Servo Circuit Diagram

    5. MAIN - RF SERVO CIRCUIT DIAGRAM RF SERVO : WAVEFORM NUMBER EAX64991602_0.1.0_Main_SD_4 2013.02.04 3-53 3-54...

  • Page 63: Front Circuit Diagram

    6. FRONT CIRCUIT DIAGRAM FRONT EAX64991401_0.1.0_FRONT_SD 2013.01.08 3-55 3-56...

  • Page 64: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART SMPS Input TYPE Used-current(mA) Total-current Real Input(V) LDO Used-power(W) Total-power(W) Item 3.7VA 10.5 10.5 STBY-LED 3.7VA Diode MBR0540 0.002 MC3401 3.7VA Diode MBR0540 0.002 MICOM & EEPROM 3.7VA 0.006 SDRAM 3.7VA 0.003 Flash 3.7VA 0.005 BU9543KV 3.7VA 3.7VA 0.009 TUNER...

  • Page 65: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-59 3-60...

  • Page 66: Main P.c.board

    2. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-61 3-62...

  • Page 67: Front P.c.board

    3. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-63 3-64...

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Cms4330fCm4530 seriesCm4530fCm4530w

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