LG OM7550 Service Manual
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LG OM7550 Service Manual

Mini hi-fi audio
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Internal Use Only
Website http://biz.lgservice.com
Mini Hi-Fi AUDIO
SERVICE MANUAL
MODEL: OM7550
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN77277076
SEPTEMBER, 2015

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  • Page 1 Internal Use Only Website http://biz.lgservice.com Mini Hi-Fi AUDIO SERVICE MANUAL MODEL: OM7550 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77277076 SEPTEMBER, 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 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 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. (ex. It is possible at VFD “NO USB” status, too.) VFD “NO DISC” status This is an example. Front ‘STOP’ + Remote control “ ” push same timing during 5s FLD “OP00-…..”...

  • Page 9: Program Download & Update Guide

    PROGRAM DOWNLOAD & UPDATE GUIDE 1. AUDIO PROGRAM Download program file name must be MICOM_OM9550_YYMMDDX.HEX 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 10: Cd Program

    2. CD PROGRAM Download program file name must be HG590_OM9550_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. Downloading file proceeds in the same way at USB1 function and USB2 function.

  • Page 11: Eq Program

    3. EQ PROGRAM Download program file name must be EQ_PRG_OMXX50_YYMMDDX_XXXX.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 12: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to the main label. Power consumption Refer to the main label. Networked standby : 0,4 W (If all network ports are activated.) Dimensions (W x H x D) 430 mm x 765 mm x 468 mm Net Weight (Approx.) 22.7 kg Operating temperature...
  • Page 13 1-12...
  • Page 14 SECTION 2 CABINET & MAIN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS ........................2-2 1. HOW TO DISASSEMBLE THE SIDE COVER (LEFT & RIGHT) ............. 2-2 EXPLODED VIEWS ............................2-5 1. CABINET AND MAIN FRAME SECTION ....................2-5 2. DECK MECHANISM SECTION (DM19) ....................2-7 3.

  • Page 15: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. HOW TO DISASSEMBLE THE SIDE COVER (LEFT & RIGHT) Step 1) Insert JIG into groove and then raise Cover_Side with a lever(JIG) to outside direction. Figure 1 Step 2) Tap(Push-silde) Cover_Side to back direction. Figure 2...
  • Page 16 Step 3) Seperate Cover_Side to out direction. Figure 3...

  • Page 18: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION CABLE5 SMPS MAIN FRONT CABLE3 CABLE2...

  • Page 19: Deck Mechanism Section (Dm19)

    2. DECK MECHANISM SECTION (DM19AA) 1439 1002 A001 1006 1005 1001 1026 1003 1004 1030 1024 1437 1437 1024 1024 1012 1049 1437 1013 1016 1015 1024 1020 1011 A006 1019 1043 A005 1018 1045 1439...

  • Page 20: Packing Accessory Section

    3. PACKING ACCESSORY SECTION 300 Power Cord 801 Owner’s manual 825 FM Antenna 808 Batteries 900 Remote Control 803 Packing 803 Packing 804 Bag 803 Packing 803 Packing 802 Box...
  • Page 21 2-10...
  • Page 22 SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..............................3-2 1. NO POWER ................................3-2 2. NO AMP POWER............................... 3-3 3. NO BOOTING WHEN POWER ON THE SET ......................3-4 4. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ..................3-5 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: Amp Power

    ONE POINT REPAIR GUIDE 2. NO AMP POWER If the unit doesn’t work by no ±PVDD problem, repair the set according to the following guide. 2-1. FUSE/ FET 2-1-1. Solution Please check and replace F911, Q905~Q906 on SMPS board. 2-1-2. How to troubleshoot (Countermeasure) 1) Check if the fuse F911 is open or short-circuit.

  • Page 25: Booting When Power On The Set

    ONE POINT REPAIR GUIDE 3. 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. 3-1. IC501 3-1-1. Solution Replace IC501 on MAIN board. 3-1-2. How to troubleshoot (Countermeasure) 1) Check the 5.6 VA (CN106) and DVCC_3.3 V (IC505) in standby mode.

  • Page 26: Vfd Is Not Displayed When Power On The Set

    ONE POINT REPAIR GUIDE 4. VFD IS NOT DISPLAYED WHEN POWER ON THE SET When power on the set, any icons or characters on VFD are not displayed. 4-1. VFD (DIG300) 4-1-1. Solution Please check and replace DIG300 on FRONT board. 4-1-2.

  • Page 27: Audio Output Is Small Or No Audio Output

    ONE POINT REPAIR GUIDE 5. AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT Audio signal output is small or not. when you power on the Middle Power Mini System. 5-1. AMP IC (IC700, IC701, IC705) 5-1-1. Solution Replace IC700, IC701, IC705 on MAIN board. 5-1-2.

  • Page 28: Power On (Standby Led Is Blinking)

    ONE POINT REPAIR GUIDE 6. NO POWER ON (STANDBY LED IS BLINKING) It doesn’t turn on, and blinks standby LED(Red). 6-1. AMP FETs 6-1-1. Solution Replace AMP FET on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) This symptom occurs, when DC protection is detected. Main reasons are like below. - When some of AMP FETs dead.

  • Page 29: Speaker No Audio

    ONE POINT REPAIR GUIDE 7. SPEAKER NO AUDIO Speaker No Audio 7-1. AMP IC (IC700, IC701, IC705) 7-1-1. Solution Replace IC700, IC701, IC705 on MAIN board. 7-1-2. How to troubleshoot (Countermeasure) 1) Check supply voltage of AMP(CN110) & PWM signal Normal supply voltage and signal ...
  • Page 30 ONE POINT REPAIR GUIDE 8. 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. 8-1.

  • Page 31: 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. 8-2.
  • Page 32 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. 8-3.
  • Page 33 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. 8-4.
  • Page 34 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. 8-5.
  • Page 35 ONE POINT REPAIR GUIDE 9. 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 36: 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. 9-2.
  • Page 37 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 38 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. 9-4.
  • Page 39 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. 9-5.
  • Page 40 ONE POINT REPAIR GUIDE 10. NO SOUND There is no sound output in the USB function, repair the set according to the following guide. 10-1. USB FUNCTION 10-1-1. Solution Replace IC501 on MAIN board, ICA201 on TOP board. 10-1-2. How to troubleshoot (Countermeasure) 1) Check +5 VU to USB board.

  • Page 41: Sound

    ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the AUX function, repair the set according to the following guide. 10-2. AUX FUNCTION 10-2-1. Solution Replace IC201 on MAIN board. 10-2-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC201 (pin23, 24). 2) Check if MCS_BCK, MCS_LRCK &...
  • Page 42 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the PORT. IN function, repair the set according to the following guide. 10-3. PORT. IN FUNCTION 10-3-1. Solution Replace IC201 on MAIN board. 10-3-2. How to troubleshoot (Countermeasure) 1) Check PT_L/R signal from FRONT board to MAIN board.
  • Page 43 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the TUNER function, repair the set according to the following guide. 10-4. TUNER FUNCTION 10-4-1. Solution Replace IC201, TU500 on MAIN board. 10-4-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_L/R is entered from pin1 & 3 of TU500 to IC201(pin26, 27). ...
  • Page 44 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the MIC IN function, repair the set according to the following guide. 10-5. MIC IN FUNCTION 10-5-1. Solution Replace ICA301 on FRONT board, IC206 on MAIN board. 10-5-2. How to troubleshoot (Countermeasure) 1) Check MIC_SIG signal to pin5 of CN201.
  • Page 45 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the Bluetooth function, repair the set according to the following guide. 10-6. BLUETOOTH FUNCTION 10-6-1. Solution Replace IC501 on the MAIN board or B/T module on the Front Panel. 10-6-2.

  • Page 46: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON SMPS BOARD No output 5.6 VA Replace F901 (same fuse). Is the F901 normal? Replace BD901. Is BD901 normal? Is the VCC Is D960/ D961 normal? (11 V ~ 25 V) supplied to IC901 pin4? Power line of MAIN PCB is short.
  • Page 47 ELECTRICAL TROUBLESHOOTING GUIDE No -5 V Is the Is the D959 normal? Check or replace 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 AMP output Is the Is the C904 Voltage Check PFC P.CTL from μ-com. PFC P.CTL OK? about 390 V? Is the VCC 12 V supplied to Replace D908, Q955, PC903. IC904 pin16? Check or replace IC904, Q907~Q910. Is the Is F911 normal? Check AMP P.CTL from μ-com.

  • Page 49: System Part

    ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM PART Power on. CN605 “HELLO” cable connection Display on FLD Check FFC cable. CN605 pin7, 14, 15, 16 power Check SMPS board. CN605 pin8, 9, 10 data signal Check MAIN board. FL+/- & VKK voltage OK? Replace DIG3E11.

  • Page 50: Audio Check

    ELECTRICAL TROUBLESHOOTING GUIDE 3. NO AUDIO CHECK CD FUNCTION Is Motor_open/ close OK? LOAD +, - OK? disc insert? (IC400 pin6, 7) Check IC501. Is motor impedance Check loading motor. about 12 Ω? Check IC400. Focusing/ OPU driving Tracking/ Sled signal Disc reading OK? (Focusing &...
  • Page 51 ELECTRICAL TROUBLESHOOTING GUIDE USB play ICA201 When insert USB, USB Power +5 VU Replace ICA201. IC501 pin U7, U8, A7, A8 USB_D signal OK? IC201 Check audio cable. pin23, 24 AUX input signal IC201 Check IC501. pin42, 43, 44 I2S input signal IC201 Replace IC201.
  • Page 52 ELECTRICAL TROUBLESHOOTING GUIDE POT. IN IC201 Check FRONT board. pin9, 10 POT. IN input signal IC201 Check IC501. pin42, 43, 44 I2S input signal IC201 pin41 Replace IC201. ADC/MIC_data output signal TUNER TU500 IC201 pin26, 27 TUNER_L/R output TUNER_L/R input signal Check +3.3 V of TU500.
  • Page 53 ELECTRICAL TROUBLESHOOTING GUIDE IC501 Check IC501. pinD1, D2, E1 I2S Clock signal IC501 Check IC501. pinE2 I2S data signal IC202 Replace IC202. PWM data output signal 3-32...
  • Page 54 ELECTRICAL TROUBLESHOOTING GUIDE pin45~48 of IC202, pin49, 50 of IC202, FRONT signal OK? MID or SW signal OK? Check IC202. Check IC202. IC204, IC205 IC204 FRONT MID or SW audio signal OK? audio signal OK? Check IC204. Check IC204, IC205. pin13 of pin13 of IC700 IC701, IC705 MID or SW...

  • Page 55: Lighting (Speaker Led)

    ELECTRICAL TROUBLESHOOTING GUIDE 4. NO LIGHTING (SPEAKER LED) Power on Push the “LIGHTING” button. Trun on the LED? Check Q616~Q618 Replace Q616~Q618. LED_5 V. IC601 LED 5 V Check IC601. Check speaker. 3-34...

  • Page 56: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. DSP (IC501) X X I X X I Fig 1-1. Crystal of RTC 32.768 kHz Fig 1-2. Crystal of system 24 MHz (Both ends of R5D6) X501 (Main DSP : R508, C503) X500 MBER 3-35...

  • Page 57: Pwm (Ic202)

    2. PWM (IC202) X X I Fig 2-1. Crystal 24.576 MHz Fig 2-2. DSP to PWM I2S (IC202 pin4, 5) X200 IC202 pin26~30 3-36...

  • Page 58: Servo (Ic401)

    3. SERVO (IC401) X X I Fig 3-1. Crystal 16.9344 MHz Fig 3-2. CD-16M (X400) (IC401 pin31) 3-37...

  • Page 59: 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) 3-38...

  • Page 60: Adc (Ic201)

    5. ADC (IC201) 6. USB (CN502) Fig 5. ADC I2S Fig 6. USB D+/ D- (IC201 pin42, 43, 44) (CN502 pin5, 6, 8, 9) 3-39...

  • Page 61: Bluetooth (Cn504)

    7. BLUETOOTH (CN504) 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 (CN504 pin4, 6, 9) 3-40...

  • Page 62: Wiring Diagram

    WIRING DIAGRAM Tuner IN/OUT Front Woofer IC604 IC603 IC206 DRV632 EXPENDER BU2090F PCM1808 IC602 IC201 IC503 Q705/Q706 Q707/Q708 Q717/Q718 PCM5101 F/S 16M IRF6775M IRF6775M IRF6775M CS5346 IC501 W25Q128 IC401 MLC3730 IC400 RF IC IC700 IC701 IC705 Motor DR BU9546 GATE DRIVE GATE DRIVE GATE DRIVE AM5890...

  • Page 63: Block Diagrams

    IRS2092 IRF6775 AZ4580 DIG311 MAIN VOL_A/B , KEY 1/2 Volume/ [OM7550 : Total 1000 W] [OM9550 : Total 1500 W] Woofer Speaker MID : 500 W X 1 CH WOOFER : 1000 W X 1 CH Key/switch Lighting FRONT : 500 W X 1 CH...

  • Page 64: Power Block Diagram

    2. POWER BLOCK DIAGRAM 25mA SMPS FL± 370mA IC201 IC206 PICK 505mA IC600 505mA DVCC_5V CS5346 PCM1808 +14AV DC_DC TPS54331 20mA 10mA 80mA IC312 1000mA IC602 IC401 IC202 IC101 IC603 IC604 TU500 RF IC MICOM EXPENDER A278R05 DRV632 TUNER PCM5101 BU9546 PS9860 R5F100G...

  • Page 65: Circuit Diagrams

    BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD BE REPLACED ONLY WITH TYPES PERFORMANCE IMPROVEMENT CHANGES INTO 1.

  • Page 66: Smps_Power #2 Circuit Diagram

    BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD BE REPLACED ONLY WITH TYPES PERFORMANCE IMPROVEMENT CHANGES INTO 2.

  • Page 67: Main_Cd Dsp Circuit Diagram

    3. MAIN_CD DSP CIRCUIT DIAGRAM MAIN_CD DSP EAX66487701-SD(#01)_Rev1.5_12 : WAVEFORM NUMBER 2015. 07. 29 3-51 3-52...

  • Page 68: Main_Adc/Pwm Circuit Diagram

    4. MAIN_ADC/PWM CIRCUIT DIAGRAM MAIN_ADC/PWM EAX66487701-SD(#02)_Rev1.5_12 : WAVEFORM NUMBER 2015. 07. 29 3-53 3-54...

  • Page 69: Main_Rf Servo Circuit Diagram

    5. MAIN_RF SERVO CIRCUIT DIAGRAM MAIN_RF SERVO EAX66487701-SD(#03)_Rev1.5_12 : WAVEFORM NUMBER 2015. 07. 29 3-55 3-56...

  • Page 70: Main_Amp Circuit Diagram

    6. MAIN_AMP CIRCUIT DIAGRAM MAIN_AMP EAX66487701-SD(#04)_Rev1.5_12 2015. 07. 29 3-57 3-58...

  • Page 71: Main_Aux Out/ Vfd Pwr Circuit Diagram

    7. MAIN_AUX OUT/ VFD PWR CIRCUIT DIAGRAM MAIN_AUX OUT/ VFD EAX66487701-SD(#05)_Rev1.5_12 2015. 07. 29 3-59 3-60...

  • Page 72: Front Circuit Diagram

    8. FRONT CIRCUIT DIAGRAM FRONT EAX66449901-SD_Rev1.4_7 2015. 07. 29 3-61 3-62...

  • Page 73: Vfd/Rmc1 Circuit Diagram

    9. VFD/RMC1 CIRCUIT DIAGRAM VFD/RMC1 EAX66468901-SD_Rev1.5_12 2015. 07. 29 3-63 3-64...

  • Page 74: Top Circuit Diagram

    10. TOP CIRCUIT DIAGRAM EAX66450001-SD_Rev1.5_8 2015. 07. 29 3-65 3-66...

  • Page 75: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs 2. CAPACITORS Specifi cation Ratied -20% Ratied +20% Rated-20%(88V, 60Hz) Rated+20%(288V, 60Hz) Parts Name Location No. Capacity Specifi cation Voltage (V) Voltage (V) Voltage (V) Voltage (V) Voltage (V) IC101 C209 4.7u 2.02 2.02 R5F100GEAFB VDD:-0.5~6.5V VDD : 3.31V VDD : 3.31V...

  • Page 76: Connectors

    3. CONNECTORS 4. ZENER DIODES Input Output Location No. Voltage Pin No. Pin Name Spec [%] Range [%] Margin [%] Margin [%] Voltage Voltage ZD901 SMPS <-> MAIN CN901 (SMPS) CN106 (MAIN) ZD902 (TVS) ±10% -4.98 -0.4% -4.96 -0.8% ZD904, ZD905, ZD906, ZD907, ZD909, ZD911 +5.6V ±10% 5.63...

  • Page 77: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P. C. BOARD (TOP VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-71 3-72...

  • Page 78: Smps P. C. Board (Bottom View)

    2. SMPS P. C. BOARD (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-73 3-74...

  • Page 79: Main, Vfd/Rmc1 P.c.board (Top View)

    3. MAIN, VFD/RMC1 P.C.BOARD (TOP VIEW) 3-75 3-76...

  • Page 80: Main, Vfd/Rmc1 P.c.board (Bottom View)

    4. MAIN, VFD/RMC1 P.C.BOARD (BOTTOM VIEW) 3-77 3-78...

  • Page 81: Front P.c.board (Top View)

    5. FRONT P.C.BOARD (TOP VIEW) 6. FRONT P.C.BOARD (BOTTOM VIEW) 3-79 3-80...

  • Page 82: Top(Volume_Fr1) P.c.board (Top View)

    7. TOP(VOLUME_FR1) P.C.BOARD (TOP VIEW) 3-81 3-82...

  • Page 83: Top(Volume_Fr1) P.c.board (Bottom View)

    8. TOP(VOLUME_FR1) P.C.BOARD (BOTTOM VIEW) 3-83 3-84...
  • Page 84 APPENDIX MECHANISM (DM19AA) CONTENTS DECK MECHANISM DISASSEMBLY 1. Cover Top ..............................2 2. Clamp Assembly ............................2 2-1. Plate ..............................2 2-2. Magnet ..............................2 2-3. Clamp ..............................2 3. Tray Disc ..............................3 4. Pick Up Assembly ............................4 5. Base Up/Down ............................4 6. Belt Loading ..............................5 7.

  • Page 85: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY (S1) Cover Top Clamp Assembly Clamp Assembly Plate Magnet Clamp (L1) < Figure A > < Figure B > 1. Cover Top 2. Clamp Assembly 1) Remove the 2 screws (S1). 1) Place the Clamp Assembly as Figure B. 2) Unhook the 4 Locking Tabs (L1) by using a 2) Bending the Cover Top in direction of flat-head screwdriver.

  • Page 86: Tray Disc

    DECK MECHANISM DISASSEMBLY Emergency eject hole MD Sub (H1) Assembly Tray Disc < Bottom side view > Tray Disc < Figure D > Tray Disc 3) Grasp the both sides of the Tray Disc and lift it up as Figure D, and then pull the Tray Disc <...

  • Page 87: Pick Up Assembly

    DECK MECHANISM DISASSEMBLY Gasket Tape Base Up/Down Deck PCB Assembly (L2) (H2) < Bottom side view > (S2) Base Main Figure G-3 Guide FFC Cable Rubber Pick Up Damper Assembly Base Up/Down Figure G-1 Figure G-2 < Figure G > 5.

  • Page 88: Belt Loading

    DECK MECHANISM DISASSEMBLY Base Main Figure H-1 Guide Gear Loading Gear Pulley (L3) Base Main < Bottom side view > Belt Loading (L4) Deck PCB Motor < Bottom side view > Assembly < Bottom side view > Assembly Deck PCB (S3) Assembly <...

  • Page 89: Deck Mechanism Exploded View (Dm19Aa)

    DECK MECHANISM EXPLODED VIEW (DM19AA) 1439 1002 A001 1006 1005 1001 1026 1003 1004 1030 1024 1437 1437 1024 1024 1012 1049 1437 1013 1016 1015 1024 1020 1011 A006 1019 1043 A005 1018 1045 1439...

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