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Internal Use Only Mini Hi-Fi AUDIO SERVICE MANUAL MODEL: OM7560 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77483239 APRIL, 2016...
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.
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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.
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.
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 ...
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 5 s FLD “OP00-…..”...
PROGRAM DOWNLOAD GUIDE 1. AUDIO PROGRAM Download program file name must be MICOM_OM7560_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.
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2. CD PROGRAM Download program file name must be HG690_OM7560_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.
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3. 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.
SPECIFICATIONS • GENERAL Power requirements Refer to the main label. Power consumption Refer to the main label. Dimensions (W x H x D) 330 x 815 x 302 mm Net Weight (Approx.) 16.8 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 % Bus Power Supply (USB)
DISASSEMBLY INSTRUCTIONS 1) When disassembling the Frame Top, do not rotate and disassemble by pulling upwards. Figure 1 2) To disassemble the Front Panel, remove the two screws and disassemble. Figure 2...
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 260L MAIN CABLE4 260R CABLE1 CABLE2 CABLE3...
3. PACKING ACCESSORY SECTION Optional Part 808 Batteries 801 Owner’s manual 825 FM antenna 300 Power Cord 900 Remote control 803 Packing 803 Packing 804 Bag 802 Box...
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SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..........................3-2 1. NO POWER ............................3-2 2. NO BOOTING WHEN POWER ON THE SET..................3-3 3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ..............3-4 4. NO BOOTING (IN CD/USB FUNCTION) ....................3-5 5.
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.
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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. 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.
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. IC501 2-1-1. Solution Replace IC501 on MAIN board. 2-1-2. How to troubleshoot (Countermeasure) 1) Check the +12 VA (CN202) and 3.3VA (IC503) in standby mode.
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 (VFD301) 3-1-1. Solution Please check and replace VFD301 on TOP FRONT board. 3-1-2.
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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.
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.
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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.
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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 MOTOR among them.
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.
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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.
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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.
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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.
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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. 6-1. DIGITAL AUDIO AMP DAMAGE 6-1-1. Solution Replace IC701, IC702 on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) Check PWM_FL±, PWM_FR±...
ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the CD FUNCTION, repair the set according to the following guide. 6-2. CD FUNCTION 6-2-1. Solution Replace IC501 on MAIN board. 6-2-2. How to troubleshoot (Countermeasure) 1) Check CD_BCK, CD_LRCK, & CD_DATA signals from IC501 to IC401. ...
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ONE POINT REPAIR GUIDE 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 Replace IC204 on MAIN board. 6-3-2. How to troubleshoot (Countermeasure) 1) Check +5V_USB to USB board. ...
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ONE POINT REPAIR GUIDE 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 Replace IC201 on MAIN board. 6-4-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC201 (pin23, 24). 2) Check if MCS_BCK, MCS_LRCK &...
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ONE POINT REPAIR GUIDE 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 Replace IC201 on MAIN board. 6-5-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from pin1, 3 of TU500 to IC201 (pin26, 27). ...
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ONE POINT REPAIR GUIDE 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 Replace IC201 on MAIN board. 6-6-2. How to troubleshoot (Countermeasure) 1) Check if PT_LR signals to IC201 (pin9, 10). 2) Check if MCS_BCK, MCS_LRCK, &...
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ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the MIC IN function, repair the set according to the following guide. 6-7. MIC IN function 6-7-1. Solution Replace IC206 on MAIN board, ICA301 on TOP FRONT board. 6-7-2.
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ONE POINT REPAIR GUIDE 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 IC501 on the MAIN board or bluetooth module on the FRONT Panel. 6-8-2.
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.
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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? •...
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ELECTRICAL TROUBLESHOOTING GUIDE No LED Is Vcc (DVCC_3.3V) Check or replace IC505 supplied to IC103? Is LED_5V & F_LED_12V is normal? Check or replace IC207, Q210 & Q209. Check or replace IC931. No VFD Check or replace Q209, Q210. VFD_12V is normal? DVCC_5V &...
ELECTRICAL TROUBLESHOOTING GUIDE 2. MCS PART CHECK MCS PART CHECK Check if voltage Refer to SMPS troubleshooting. of CN202 pin1, 2: 12 V. Check if IC205 Check and change IC205. have 3.3 VA & 1.2 VA output. Check if IC505 Check and change IC505.
ELECTRICAL TROUBLESHOOTING GUIDE 3. FLD DISPLAY CHECK FLD DISPLAY CHECK Check Refer to SMPS/MPEG CN202 pin1, 2: 12 V input troubleshooting. voltage. Check Check if both end voltage DVCC_5V(Q205 & Q204) of FL+, FL- are over 1.85 V VH : Q801, Q802, D801~D804. VH : over 29 V.
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...
WAVEFORMS OF MAJOR CHECK POINT 1. DSP (IC501) 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 (R5D6 both side) ( MAIN DSP : R508, C503 ) 3-33...
2. POWER BLOCK DIAGRAM 300mA IC203 330mA BOOM B LED LED_5V 500mA SN1501019 USB1 USB_5V SMPS BD2242G [3A] 785mA 135mA 500mA [2.1] SPK LED USB2 60mA EXPENDER MOTO DRIVE 350mA Front LED AM5890 25mA 50mA LINE OUT CS5346 DRV632 11mA 11mA MIC ADC EXPENDER...
CIRCUIT VOLTAGE CHART 1. IC INPUT VOLTAGE 2. CAPACITOR VOLTAGE 110V/60Hz-10% 230V/50Hz+10% 88 V, 60 Hz 288 V, 60 Hz Locaton/ Parts Parts Name Specifi cation (V, mV) Location Voltage (V) Voltage (V) Voltage (V) Current (mV) Voltage (V) Current (mV) IC101 C231 4.95...
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3. CONNECTOR VOLTAGE Connector Connector Connector Location Pin No. Pin Name Voltage(V) Location Pin No. Pin Name Voltage(V) Location Pin No. Pin Name Voltage(V) Name Name Name 3.3VA 3.29 OPEN_SW 3.25 3.29 CLK_FORM UCOM 0.00 0.01 3.29 DAT_FORM UCOM 0.00 CLOSE_SW 3.25 CN601...
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. 3-75 3-76...
DECK MECHANISM DISASSEMBLY TRAY DISC MAIN BASE PLATE CLAMP MAGNET CLAMP BASE MAIN DISC CLAMP ASSEMBLY CLAMP UPPER (Fig. A) HOLDER LEVER BASE MAIN BOTTOM SIDE VIEW BASE MAIN Fig. 4-1 Fig. 4-2 Fig. 4-2 1. Main Base (Fig. 4-1) 2.
RUBBER DAMPER Distinguish upper and (S2) lower sides (Assemble with care) (S2) RUBBER DAMPER Distinguish upper and (S2) lower sides RUBBER DAMPER (Assemble with care) BASE PU (S2) RUBBER DAMPER GENERAL PICK UP ASSEMBLY GEAR RACK SPINDLE MOTOR ASSEMBLY Fig. 4-3 3.