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LG CM5660 Service Manual
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LG CM5660 Service Manual

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Internal Use Only
MINI HI-FI SYSTEM
SERVICE MANUAL
MODEL: CM5660
(CM5660, CMS5760F)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN77612031
OCTOBER, 2016

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  • Page 1 Internal Use Only MINI HI-FI SYSTEM SERVICE MANUAL MODEL: CM5660 (CM5660, CMS5760F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77612031 OCTOBER, 2016...
  • 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 GUIDE ........................1-8 SPECIFICATIONS ............................1-10...

  • 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 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 HIDDEN MODE ENTRANCE KEY EXIT KEY Version Check Front ‘Stop’ + Remote Control Key ‘ ’ for 5 s Remote Control Key ‘ ’ for 1.5 s EEPROM Initial Auto Exit Front ‘Stop’ + Remote Control Key ‘ ’...

  • Page 8: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON It is possible at any function. (ex. It is possible at VFD “NO USB” status, too.) VFD “NO DISC” status This is an example. Front ‘Stop’ + Remote control ‘ ’ DETECT NEW EEPROM push same timing during 5 s (OPTION EDIT SCREEN) NAME...

  • Page 9: Program Download Guide

    PROGRAM DOWNLOAD GUIDE 1. DSP PROGRAM Download program file name must be HG640_CM5760(CM5660)_YYMMDDX.bin If security program(Water Wall) is activated on PC, you must save the file to the USB storage device and disable the security software, then download the file to your set.
  • Page 10 2. EQ PROGRAM Download program file name must be EQ_PRG.BIN If security program(Water Wall) is activated on PC, you must save the file to the USB storage device and disable the security software, then download the file to your set. Downloading file proceeds in the same way at USB1 function and USB2 function.

  • Page 11: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to the main label on the unit. Power consumption Refer to the main label on the unit. Networked standby : 0.5 W (If all network ports are activated.) Dimensions (W x H x D) Approx.
  • Page 12 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................2-3 1. CABINET AND MAIN FRAME SECTION ....................2-3 2. PACKING ACCESSORY SECTION ......................2-7 3. SPEAKER SECTION ..........................2-8...

  • Page 14: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SMPS FRONT CABLE4 CABLE1 MAIN...

  • Page 16: Packing Accessory Section

    2. PACKING ACCESSORY SECTION 801 Owner’s manual 808 Battery 825 FM Wire Antenna 900 Remote Control 803 Packing 804 Bag 803 Packing 802 Box...

  • Page 17: Speaker Section

    3. SPEAKER SECTION...
  • Page 18 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 BOOTING (IN CD/USB FUNCTION) ....................3-6 5.

  • Page 19: 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/ THERMISTOR/ BRIDGE DIODE 1-1-1. Solution Please check and replace F901, TH901 or TH903, BD901 on SMPS board. 1-1-2.
  • Page 20 ONE POINT REPAIR GUIDE 1. NO POWER If the unit doesn’t work by no PVDD problem, repair the set according to the following guide. 1-2. FUSE/ FET 1-2-1. Solution Please check and replace F901, Q901 on SMPS board. 1-2-2. How to troubleshoot (Countermeasure) 1) Check if the fuse F901 is open or short-circuit.

  • Page 21: 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 top board or the remote control. 2-1. IC500 2-1-1. Solution Please check and replace IC500 on MAIN board. 2-1-2.

  • Page 22: 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 (VFD300) 3-1-1. Solution Please check and replace VFD300 on FRONT board. 3-1-2.

  • Page 23: Booting (In Cd/Usb Function)

    ONE POINT REPAIR GUIDE 4. NO BOOTING (IN CD/USB FUNCTION) After you turn on power key and displayed message in the following order (HELLO  VOL XX  CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-1.
  • Page 24 ONE POINT REPAIR GUIDE 4. NO BOOTING (IN CD/USB FUNCTION) After you turn on power key and displayed message in the following order (HELLO  VOL XX  CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-2.
  • Page 25 ONE POINT REPAIR GUIDE 4. NO BOOTING (IN CD/USB FUNCTION) After you turn on power key and displayed message in the following order (HELLO  VOL XX  CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-3.

  • Page 26: Operation Of Md

    ONE POINT REPAIR GUIDE 5. 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 moter among them.
  • Page 27 ONE POINT REPAIR GUIDE 5. 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. 5-2.
  • Page 28 ONE POINT REPAIR GUIDE 5. 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 29 ONE POINT REPAIR GUIDE 5. 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 30 ONE POINT REPAIR GUIDE 5. 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 31: Sound

    ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the CD function, repair the set according to the following guide. 6-1. CD FUNCTION 6-1-1. Solution Please check and replace IC500 on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) Check CD_BCK, CD_LRCK, &...
  • Page 32 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide. 6-2. DIGITAL AUDIO AMP DAMAGE 6-2-1. Solution Please check and replace IC701, IC702 on MAIN board. 6-2-2.
  • Page 33 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the USB function, repair the set according to the following guide. 6-3. USB FUNCTION 6-3-1. Solution Please check and replace IC104 on MAIN board. 6-3-2. How to troubleshoot (Countermeasure) 1) Check +5V_USB to USB board.
  • Page 34 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the AUX function, repair the set according to the following guide. 6-4. AUX FUNCTION 6-4-1. Solution Please check and replace IC202 on MAIN board. 6-4-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC202 (pin23, 24).
  • Page 35 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the TUNER function, repair the set according to the following guide. 6-5. TUNER FUNCTION 6-5-1. Solution Please check and replace IC202 on MAIN board. 6-5-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from pin1, pin3 of TU200 to IC202 (pin9, pin10).
  • Page 36 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the PORTABLE function, repair the set according to the following guide. 6-6. PORTABLE FUNCTION, 6-6-1. Solution Please check and replace IC202 on MAIN board. 6-6-2. How to troubleshoot (Countermeasure) 1) Check if PT_LR signals to IC202 (pin26, pin27).
  • Page 37 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the MIC IN FUNCTION, repair the set according to the following guide. 6-7. MIC IN FUNCTION 6-7-1. Solution Please check and replace IC200, IC203 on MAIN board. 6-7-2.
  • Page 38 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the bluetooth function, repair the set according to the following guide. 6-8. BLUETOOTH FUNCTION 6-8-1. Solution Replace IC500 on the MAIN board or bluetooth module on the FRONT Panel. 6-8-2.

  • Page 39: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER (SMPS) No 12 VA F901 normal? Replace F901 (Use the same fuse). BD901 normal? Replace BD901. TH901(TH903) normal? Replace TH901. Is Vcc (10 V ~ 18 V) supplied to D902 normal? IC901 pin7? Check or replace D902. D933 normal? Replace D933.
  • Page 40 ELECTRICAL TROUBLESHOOTING GUIDE No PVDD F901 normal? Replace F901 (Use the same fuse). BD901 normal? Replace BD901. TH901(TH903) normal? Replace TH901. Is Vcc (10 V ~ 18 V) supplied to D903 normal? IC911 pin4? Check or replace D903. Q911 base HIGH? •...
  • Page 41 ELECTRICAL TROUBLESHOOTING GUIDE No LED +12 VA is normal Check SMPS circuits. to the Q105 Emitter? Is LED_5V & VFD_12V is normal? Check or replace IC101, Q105. Check or replace Q302. No VFD Check or replace Q105. VFD_12V is normal? DVCC_3.3V &...

  • Page 42: Mcs Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE 2. MCS PART CHECK MCS PART CHECK Check if voltage Refer to SMPS troubleshooting. of CN102 pin11, 12: 12 V. Check if IC100 Check and change IC100. have 3.3 VA & 1.2 VA output. Check if IC103 Check and change IC103.

  • Page 43: Fld Display Check

    ELECTRICAL TROUBLESHOOTING GUIDE 3. FLD DISPLAY CHECK FLD DISPLAY CHECK Check Refer to SMPS/MPEG CN102 pin11, 12: 12 V input troubleshooting. voltage. Check if both end voltage Check LED_5V(IC101) of FL+, FL- are over 1.85 V VH : Q300, Q301, D300 ~ D303. VH : over 29 V.

  • Page 44: Pwm Modulation Check

    ELECTRICAL TROUBLESHOOTING GUIDE 4. PWM MODULATION CHECK PWM MODULATION PART CHECK Check CN102 Refer to pin11, 12: 12 V. SMPS troubleshooting. • Check IC700(TAS5548) 3.3 V - pin9, 14, 35, 50. • Check X700 (12.288 MHz). Check Check X700 Replace X700(12.288 MHz). X700(12.288 MHz) (12.288 MHz).

  • Page 45: Power Amp Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE 5. POWER AMP PART CHECK POWER AMP PART CHECK Check CN102 pin11, 12: 12 V, Refer to SMPS troubleshooting. pin3, 4, 5: 48.5 V. Check IC701, IC702 Pin51, 52, 42, 43, 38, 39, 30, 31 input voltage. Check IC701, IC702 Check each line resistor output voltage.

  • Page 46: Tuner / Aux Function Check

    ELECTRICAL TROUBLESHOOTING GUIDE 6. TUNER / AUX FUNCTION CHECK FUNCTION CHECK Check IC200 (CS5346) Check JK200, TU200. pin23, 24, 26, 27 input. Check IC202 Check IC202 Check CN102 pin11, 12: 12 V. (CS5346) pin41 output Pin5: DVCC_3.3V Pin14: DVCC_5V. data. Check Check IC202 Check IC202...

  • Page 47: Tuner Function Check

    ELECTRICAL TROUBLESHOOTING GUIDE 7. TUNER FUNCTION CHECK TUNER FUNCTION CHECK Check tuner module (TU200) Check tuner module voltage (pin4: DVCC_3.3V). operation. Check IC500 Pin P7, P8, P10, P11. Check tuner module data. Refer to function check. 3-30...

  • Page 48: Cd Function Check

    ELECTRICAL TROUBLESHOOTING GUIDE 8. CD FUNCTION CHECK CD FUNCTION Is motor_open/close ok? Can the Is load +,- ok? (IC400 pin6, 7) disc insert? Check IC400. Is motor ok? (about 12 Ω) Check loading motor. Check IC400 (Motor drive IC). Focus, IM driving Disc reading tracking, sled signal...

  • Page 49: Double Usb Function

    ELECTRICAL TROUBLESHOOTING GUIDE 9. DOUBLE USB FUNCTION USB FUNCTION Plug-in USB device. Check JK500, JK501 pin1. Check USB_5V. Display “NO USB”. Check Check USB jack Display “READ”. USB_D+, D- (R565, R567, (JK500, JK501). D503, D504). Check IC500 Display “NO FILE”. Replace IC500.

  • Page 50: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. DSP (IC500) X X I X X I Fig 1-1. X501: Crystal of RTC 32.768 MHz Fig 1-2. X500: Crystal of system 24 MHz (R593 both side) (MAIN DSP : R574, C547) 3-33...

  • Page 51: Sdram (Ic504)

    2. SDRAM (IC504) Fig 2. SDRAM 3-34...

  • Page 52: Servo (Ic401)

    3. SERVO (IC401) X X I Fig 3-1. X400 Fig 3-2. CD-16M (Crystal 16.9344 MHz) (IC401 pin31) 3-35...

  • Page 53: Motor Driver (Ic400)

    4. MOTOR DRIVER (IC400) Fig 4-2. SL- & SL+ for Driving SPINDLE Motor Fig 4-1. LO- & LO+ / MOT_OPEN & MOT_CLOSE (IC400 pin11, 12) for Driving TRAY Motor (IC400 pin6, 7, 9, 10) Fig 4-3. SP- & SP+ for Driving SPINDLE Motor (IC400 pin17, 18) 3-36...

  • Page 54: Adc (Ic202)

    5. ADC (IC202) 6. USB (JK500) Fig 5. ADC I2S Fig 6. USB D+/D- (IC202 pin42, 43, 44) (JK500 Pin2, 3) 3-37...

  • Page 55: Bluetooth (Cn501)

    7. BLUETOOTH (CN501) B B T_TX BT_TX BT_TX BT_RX BT_RX BT_RX BT_RST BT_RST BT_RST Fig 7. BT_TX / BT_RX / BT_RST 3-38...

  • Page 56: Wiring Diagram

    WIRING DIAGRAM SPEAKER 4 pin 4 pin SMPS MAIN MI C & BLUETOOTH 17 pin PORTABLE MODULE 17 pin FRONT 3-39 3-40...

  • Page 57: Block Diagrams

    BLOCK DIAGRAMS 1. SYSTEM BLOCK DIAGRAM USB1 USB2 CD_RST SERVO A,B,C,D,E,F,PD (VCC50) BU9546 P/UP (X4 Speed) CD_RW/MCLK/LRCK/BC SPDO/SLDO K, CD_DAT /FOD/TRD AM5890 MOT_MUTE,CLOSE,OPEN LOAD ± ± ,SLED± ± , Motor Drive SPIN± ± ,TR± ± ,F± ± DECK OP_SW,CL_SW,UP_SW,DN_SW,D_SENSE MECHANISM DRM_WEN/CAS/ D1+/- IC201...

  • Page 58: Power Block Diagram

    2. POWER BLOCK DIAGRAM 100 mA TPS562209 500 mA USB1 SPK LED SMPS BD2242G USB_5V [3 A] 680 mA 500 mA [2.1] 350 mA USB2 MOTO DRIVE AM5890 150 mA VFD F+/- 80 mA CD PICK UP +12 V 1924 mA P-SENSE 50 mA CS5346...

  • Page 59: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs VOLTAGE 2. CAPACITORS VOLTAGE -20 % +20 % Location Value Capactior (uF) Spec(V) -20 % Voltage (V) +20 % Voltage (V) Location Spec (V) Voltage (V) Voltage (V) MAIN Board Vin: 2.7 V ~ 6 V Vin: 5.16 V Vin: 5.16 V C121...

  • Page 60: 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. 3-63 3-64...

  • Page 61: Main P.c.board

    2. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-65 3-66...

  • Page 62: Front P.c.board

    3. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-67 3-68...

  • Page 63: Jack P.c.board

    4. JACK P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-69 3-70...

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