LG CM8440 Series Service Manual
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LG CM8440 Series Service Manual

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Internal Use Only
Website http://biz.lgservice.com
Mini Hi-Fi System
SERVICE MANUAL
MODEL: CM8440
(CM8440, CMS8440F/W)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN76932780
JANUARY, 2015

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  • Page 1 Internal Use Only Website http://biz.lgservice.com Mini Hi-Fi System SERVICE MANUAL MODEL: CM8440 (CM8440, CMS8440F/W) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN76932780 JANUARY, 2015...
  • 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 SPECIFICATIONS ............................. 1-12...

  • 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 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 ...

  • Page 8: Service Information For Eeprom

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

  • Page 9: Program Download & Update Guide

    PROGRAM DOWNLOAD & UPDATE GUIDE 1. AUDIO PROGRAM Download program file name must be MICOM_CM8540_1311010_0x4D3F.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. Downloading file proceeds in the same way at USB1 function and USB2 function.
  • Page 10 2. CD PROGRAM Download program file name must be HG480_CM8540_1401231.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. Downloading file proceeds in the same way at USB1 function and USB2 function.
  • Page 11 3. DEMO PROGRAM Download program file name must be DEMO_DAT.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. Downloading file proceeds in the same way at USB1 function and USB2 function.
  • Page 12 4. EQ PROGRAM Download program file name must be EQ_PRG_CM8440_201401110_D2E9.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. Downloading file proceeds in the same way at USB1 function and USB2 function.

  • Page 13: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to the main label. Power consumption Refer to the main label. Dimensions (W x H x D) (290 x 349 x 370) mm Net Weight (Approx.) 5.9 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 60 % Bus Power Supply...
  • Page 14 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................. 2-3 1. CABINET AND MAIN FRAME SECTION (CM8440) ................2-3 2. MECHANISM DECK SECTION (DP17TM2) .................... 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 (CM8440) 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. CABLE1 FRONT CABLE2 SMPS CABLE3 NFC Tag MIC &...

  • Page 17: Mechanism Deck Section (Dp17Tm2)

    2. MECHANISM DECK SECTION (DP17TM2) 1439 1002 A001 1005 1001 1026 1003 1004 1024 1437 1030 1437 1024 1024 1012 1049 1016 1437 1013 1015 1024 1020 1011 A006 1019 1043 A005 1018 1045 1439...

  • Page 18: Packing Accessory Section

    3. PACKING ACCESSORY SECTION 801 Owner’s Manual 808 Battery 825 FM Wire Antenna 826 Filter, Ferrite Core 900 Remote Control 803 Packing 804 Bag 803 Packing 802 Box...

  • Page 19: Speaker Section

    4. SPEAKER SECTION 4-1. FRONT SPEAKER (CMS8440F) • LEFT SPEAKER A60L...
  • Page 20 FRONT SPEAKER (CMS8440F) • RIGHT SPEAKER A60R...
  • Page 21 4-2. SUBWOOFER SPEAKER (CMS8440W)
  • Page 22 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 23: 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 / THERMISTOR 1-1-1. Solution Please check and replace F901, BD901, TH900, TH901 on SMPS board. 1-1-2.
  • Page 24 ONE POINT REPAIR GUIDE NO POWER If the unit doesn’t work by no ±PVDD problem, repair the set according to the following guide. 1-2. NO AMP POWER 1-2-1. Solution Please check and replace F911, Q905, Q906 on SMPS board. 1-2-2. How to troubleshoot (Countermeasure) 1) Check if the fuse F901 is open or short-circuit.

  • Page 25: 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. MICOM (IC501) 2-1-1. Solution Please check and replace IC501 on MAIN board. 2-1-2.

  • Page 26: 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 (DIG300) 3-1-1. Solution Please check and replace DIG300 on FRONT board. 3-1-2.
  • Page 27 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 28: Booting In Cd/Usb Function

    ONE POINT REPAIR GUIDE 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 29 ONE POINT REPAIR GUIDE 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 30 ONE POINT REPAIR GUIDE 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. 4-4.
  • Page 31 ONE POINT REPAIR GUIDE 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. 4-5.
  • Page 32 ONE POINT REPAIR GUIDE 5. NO OPERATION OF MD (DRIVING THE SERVO MOTORS) 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 33: Operation Of Md (Driving The Servo Motors)

    ONE POINT REPAIR GUIDE NO OPERATION OF MD (DRIVING THE SERVO MOTORS) 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 34 ONE POINT REPAIR GUIDE NO OPERATION OF MD (DRIVING THE SERVO MOTORS) 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 35 ONE POINT REPAIR GUIDE NO OPERATION OF MD (DRIVING THE SERVO MOTORS) 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 36 ONE POINT REPAIR GUIDE NO OPERATION OF MD (DRIVING THE SERVO MOTORS) 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 37 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the USB FUNCTION, repair the set according to the following guide. 6-1. IN THE USB FUNCTION 6-1-1. Solution Please check and replace IC501 on MAIN board & IC300 on USB board. 6-1-2.

  • Page 38: Sound

    ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the AUX FUNCTION, repair the set according to the fol- lowing guide. 6-2. IN THE AUX FUNCTION 6-2-1. Solution Please check and replace IC202 on MAIN board. 6-2-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC202 (Pin7, 8).
  • Page 39 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the PORT. IN FUNCTION, repair the set according to the following guide. 6-3. IN THE PORT. IN FUNCTION 6-3-1. Solution Please check and replace IC202 on MAIN board. 6-3-2.
  • Page 40 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the TUNER FUNCTION, repair the set according to the following guide. 6-4. IN THE TUNER FUNCTION 6-4-1. Solution Please check and replace IC202, TU500 on MAIN board. 6-4-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from Pin1 &...
  • Page 41 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the MIC IN FUNCTION, repair the set according to the following guide. 6-5. IN THE MIC IN FUNCTION 6-5-1. Solution Please check and replace IC508 on Main Board or ICM101 on MIC board. 6-5-2.
  • Page 42 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the BLUETOOTH FUNCTION, repair the set according to the following guide. 6-6. IN THE BLUETOOTH FUNCTION 6-6-1. Solution Please check and replace IC501 on MAIN board and Bluetooth module on front panel. 6-6-2.

  • Page 43: Audio Output Is Small Or No Audio Output

    ONE POINT REPAIR GUIDE 7. AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT Audio signal output is small or not. when you power on the Middle Power Mini System. 7-1. IC700 ~ IC705 7-1-1. Solution Please check and replace IC700 ~ IC705 on MAIN board. 7-1-2.

  • Page 44: Power On (Standby Led Is Blinking)

    ONE POINT REPAIR GUIDE 8. NO POWER ON (STANDBY LED IS BLINKING) It doesn’t turn on, and blinks standby LED(Red). 8-1. AMP FETs 8-1-1. Solution Please check and replace Q705 ~ Q708, Q711 ~ Q718 on MAIN board. 8-1-2. How to troubleshoot (Countermeasure) 1) This symptom occurs, when DC protection is detected.

  • Page 45: Speaker No Audio

    ONE POINT REPAIR GUIDE 9. SPEAKER NO AUDIO Speaker No Audio 9-1. AMP IC 9-1-1. Solution Please check and replace IC700 ~ IC705 on MAIN board. 9-1-2. How to troubleshoot (Countermeasure) 1) Check supply voltage of AMP(CN110) & PWM signal Normal Supply voltage and signal ...

  • Page 46: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON SMPS BOARD No output 5.6 VA Replace F901 (same fuse). F901 normal? Replace BD901. BD901 normal? Is the VCC D960, D961 normal? (11 V ~ 25 V) supplied to IC901 Pin4? Power line of MAIN PCB is short. Check or replace D960, D961.
  • Page 47 ELECTRICAL TROUBLESHOOTING GUIDE No -5 V Is the R965 normal? Check or replace R965 / D959. VCC -7 VA supplied to IC953 Pin2? Check or replace Q951. Is there ‘H’ signal at Q953 Check P_CTL from μ-com. Base? Check or replace Q953, Q957. Or check line of MAIN PCB is short or not.
  • Page 48 ELECTRICAL TROUBLESHOOTING GUIDE No output AMP gate line Is the VCC R952 normal? 13 VA supplied to IC952 Check or replace R952. Pin1 to Pin3? Check and replace IC952. Check or replace D951, D952. Or check line of MAIN PCB is short or not. 3-27...
  • Page 49 ELECTRICAL TROUBLESHOOTING GUIDE No AMP output Is the PFC P.CTL OK? C904, C905 voltage Check PFC P.CTL from μ-com. about 380 V? Is the VCC 12 V supplied to Replace D908, Q955, PC903. IC904 Pin16? Check or replace IC904, Q907 ~ Q910. AMP P.CTL F911 normal? Check AMP P.CTL from μ-com.

  • Page 50: System Part

    ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM PART Power on. CN301 “HELLO” cable connection Display on FLD Check 17p FFC cable. CN301 Pin1, 3, 5 Check SMPS board. power OK? CN301 Pin9 ~ 11 data signal Check MAIN board. Q301, 303, 304 Replace DIG301.

  • Page 51: Audio Part

    ELECTRICAL TROUBLESHOOTING GUIDE 3. NO AUDIO PART CD FUNCTION Is motor_open/ close OK? LOAD +, - OK? disc insert? (IC408 Pin6, 7) Check IC501. Is motor impedance Check Loading motor. about 12 Ω? Check IC408. Focusing/ OPU driving Tracking/ Sled signal Disc reading OK? (Focusing &...
  • Page 52 ELECTRICAL TROUBLESHOOTING GUIDE USB play IC300 When insert USB, USB power +5 VU Replace IC300. IC501 PinU7,U8,A7,A8 USB_D signal OK? IC202 Pin7, 8 AUX input signal Check audio cable. IC202 Check IC501. Pin42,43,44 I2S input signal IC202 Pin41 Replace IC202. ADC/MIC_data output signal 3-31...
  • Page 53 ELECTRICAL TROUBLESHOOTING GUIDE POT. IN IC202 Pin21,22 POT. IN input signal Check MIC board. IC202 Check IC501. Pin42,43,44 I2S input signal IC202 Pin41 Replace IC202. ADC/MIC_data output signal TUNER TU500 IC202 TUNER_L/R output Pin23,24 TUNER_L/R input Check +3.3 V of TU500. signal OK? signal OK? IC202...
  • Page 54 ELECTRICAL TROUBLESHOOTING GUIDE IC501 Pin D1,D2,E1 I2S clock signal Check IC501. IC501 Pin E2 I2S data signal Check IC501. IC600 Replace IC600. PWM data output signal 3-33...
  • Page 55 ELECTRICAL TROUBLESHOOTING GUIDE Pin26,27,31,32 Pin28,29,35,36 of IC600, SWL/SWR± signal of IC600, FL/FR± signal Check IC600. Check IC600. IC601, 602 IC603,604 FL/FR audio signal SWL/SWR audio signal Check IC601, IC602. Check IC603, IC604. Pin13 of Pin13 of IC702,IC703,IC706,IC708 IC700,IC701,IC704,IC705 SWL/SWR audio signal FL/FR audio signal Check Check...

  • Page 56: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. WAVEFORM OF SERVO Figure 1-1. CD-16M Figure 1-2. SERVO-FE, TE, FOD, RF (IC407 Pin31) (IC407 Pin61, 62, 63 / IC408 Pin1) 3-35...
  • Page 57 2. WAVEFORM OF MOTOR DRIVE Figure 2-1. SP- & SP+ for driving SPINDLE motor Figure 2-2. SL- & SL+ for driving SPINDLE motor (IC408 Pin17, 18) (IC408 Pin11, 12) MOT_OPEN LO+(RED) MOT_CLOSE Figure 2-3. LO- & LO+ for driving Tray motor (IC408 Pin9, 10) 3-36...
  • Page 58 3. WAVEFORM OF AUDIO SIGNAL AUDIO_L LRCK DATA AUDIO_R Figure 3-1. (IC501 Pin83, 84, 85) Figure 3-2. AUDIO_L/R 4. WAVEFORM OF ADC 5. WAVEFORM OF USB LRCK Figure 4. ADC I2S Figure 5. USB D+/D- (IC202 Pin42, 43, 44) (CN502 Pin1, 2 & Pin9, 10) 3-37...
  • Page 59 6. WAVEFORM OF CRYSTAL 7. WAVEFORM OF VFD GRID CURRENT DRIVER CH1:R327(TP304) CH2:Q301 Emitter Figure 6. 12 MHz Crystal Figure 7. (IC501 Pin27, 28) 3-38...

  • Page 60: Wiring Diagram

    WIRING DIAGRAM MIC Vol FRONT 40P, 1.25mm 10P, 2mm Portable 10P, 2mm 10P, 2mm MIC & Portable 40P, 1.25mm MAIN SMPS 3-39 3-40...

  • Page 61: Block Diagrams

    BLOCK DIAGRAMS 1. SMPS BLOCK DIAGRAM MAIN SMPS (STR-2A153) 4.5V FL(+/ -) Flyback MAIN OPAMP - 5V TRANS u-com / BT PFC Out 5.6VA USB / MPEG (380V) Motor Drive PFC IC FAN/LED/ Mic (R2A20112A) Totem pole 600V On/Off Interleaved On/Off Gate P-CTRL...

  • Page 62: Main System Block Diagram

    2. MAIN SYSTEM BLOCK DIAGRAM MCS Interface A,B,C,D,E,F,P (+3.3V_RF,+3.3V_CD,+1.8V) USB1 USB2 16.9344MHz (VCC50) LC78615ERF+ SERVO SPDO/SLDO/FOD/TRD P/UP (+3.3V_USB) LOAD±,SLED±, (+5V) SPIN±,TR±,F± AM5890 USB_HUB_DP/DN MOT_MUTE,CLOSE,OPEN Mo to r Drive (+3.3V_CD, VCC1.2) MIC_SIG0 OP_SW,CL_SW,UP_SW,DN_SW,D_SENSE MIC_DET (+5_MIC) BT_RX, BT_CTS DECK MIC_SIG 32.768KHz MIC CODEC S4308 MECHANISM (+3.3V_CD)

  • Page 63: Main Power Block Diagram

    3. MAIN POWER BLOCK DIAGRAM 25mA IC501 370mA STBY ± 20mA IC101 TU101 IC407 IC600 U_COM TUNER RF IC TAS5548 RENESAS YST996 2.393A +3.3V IC505 22mA 150mA 70mA 60mA 3.2V +5.6VA TJ4220 442mA +3.3V IC3U01 10mA USB PWR IC506 IC408 LM37102D AZ1117 MOTOR...

  • Page 64: Circuit Diagrams

    BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 1. SMPS - POWER #1 CIRCUIT DIAGRAM FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND SHOULD BE REPLACED ONLY WITH TYPES PERFORMANCE IMPROVEMENT CHANGES INTO IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 65: Smps - Power #2 Circuit Diagram

    2. SMPS - POWER #2 CIRCUIT DIAGRAM Warning Parts that are shaded are critical with respect to risk of fire or electrical shock. SMPS #2 EAX65367301_18.1.6_SMPS_SD_2 2014. 01. 25 3-49 3-50...

  • Page 66: Main - Cd Dsp Circuit Diagram

    3. MAIN - CD DSP CIRCUIT DIAGRAM CD DSP EAX65564602_2.1.0_MAIN_SD_1 2014. 01. 25 3-51 3-52...

  • Page 67: Main - Rf / Servo Circuit Diagram

    4. MAIN - RF / SERVO CIRCUIT DIAGRAM RF/SERVO EAX65564602_2.1.0_MAIN_SD_3 2014. 01. 25 3-53 3-54...

  • Page 68: Main - Adc / Pwm Circuit Diagram

    5. MAIN - ADC / PWM CIRCUIT DIAGRAM ADC/PWM EAX65564602_2.1.0_MAIN_SD_4 2014. 01. 25 3-55 3-56...

  • Page 69: Main - Amp Circuit Diagram

    6. MAIN - AMP CIRCUIT DIAGRAM EAX65564602_2.1.0_MAIN_SD_5 2014. 01. 25 3-57 3-58...

  • Page 70: Front Volume Circuit Diagram

    7. FRONT VOLUME CIRCUIT DIAGRAM FRONT VOLUME EAX65547303_1.1.0 2015. 01. 19 3-59 3-60...

  • Page 71: Mic & Portable Circuit Diagram

    MIC & PORTABLE CIRCUIT DIAGRAM MIC & PORTABLE EAX65589003_1.1.0 2015. 01. 19 3-61 3-62...

  • Page 72: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. CONNECTORS 2. CAPACITORS Location Spec CABLE Margin CABLE Margin Play back Standby No Pin Spec (V) Location Value & Spec Voltage_Spec Pin No Range (V) Input Output positive (+) positive (+) CN106 (MAIN) CN901 (SMPS) CN106 (MAIN) C102 4.7uF/50V 1.75...

  • Page 73: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (TOP VIEW) 3-65 3-66...
  • Page 74 SMPS P.C.BOARD (BOTTOM VIEW) 3-67 3-68...

  • Page 75: Main P.c.board

    2. MAIN P.C.BOARD (TOP VIEW) 3-69 3-70...
  • Page 76 MAIN P.C.BOARD (BOTTOM VIEW) 3-71 3-72...

  • Page 77: Front Volume P.c.board

    3. FRONT VOLUME P.C.BOARD 3-73 3-74...

  • Page 78: Mic & Portable P.c.board

    MEMO 4. MIC & PORTABLE P.C.BOARD 3-75 3-76...
  • Page 79 MEMO MEMO 3-77 3-78...

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