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3-8

ELECTRICAL TROUBLESHOOTING GUIDE

2. CHARGING BATTERY

Charging battery.

Connect CN900, CN301.

Connect CN901.

Change adapter.

Replace IC300.

Change battery.

Charging.

Connect adapter cable.

Does 9.6 V come out

CN301 pin11, 12, 13?

Replace IC902.

Does 9.6 V enter IC906

(Check pin2, 3)?

IC906 is HIGH

(Check pin9)?

Red LED of

power key blink?

Check the connection

of adapter cable.

NO

YES

YES

NO

NO

NO

If it still doesn’t work

NO

Check connection

of CN900 and CN301.

Does 5 V come out

CN300 pin1?

Check

connection of CN901.

YES

NO

YES

NO

YES

YES

YES

NO

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Содержание NP7550 Music flow P7

Страница 1: ...RVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only Website http biz lgservice com Portable Bluetooth Speaker MARCH 2015 P NO AFN76872634 MODEL NP7550 MODEL NP7550 ...

Страница 2: ...1 1 CONTENTS SECTION 1 GENERAL SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST ...

Страница 3: ...N 1 GENERAL CONTENTS ESD PRECAUTIONS 1 3 HIDDEN KEY MODE 1 4 PROGRAM UPDATE GUIDE 1 5 SERVICE INFORMATION FOR EEPROM 1 9 MCS EQ PROGRAM USB UPDATE 1 10 PROGRAM UPGRADE USING DOWNLOAD JIG 1 11 SPECIFICATIONS 1 15 ...

Страница 4: ...harges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparabl...

Страница 5: ...ration Test Volume 19 Volume Up Power key for 3 seconds Scan Enable Bluetooth key for 2 seconds Bluetooth all Disconnect Paired List Clear Bluetooth key for 10 seconds Dual Play Master Bluetooth Volume Up key for 2 seconds Dual Play Slave Bluetooth Volume Down key for 2 seconds Sound Sync Bluetooth Play Pause key for 2 seconds Volume UP Play Pause Bluetooth Power Volume DOWN ...

Страница 6: ...on the Apps Store or Google Play Store 2 PROGRAM UPDATE BY Music Flow Bluetooth APP 1 After power on Press and Hold Power Volume Up Key for 3 seconds PROGRAM UPDATE GUIDE Beep sound is output and all white LED blink once 2 Run Music Flow Bluetooth APP ex Android Bluetooth APP ...

Страница 7: ...1 6 Step 1 Search and connect speaker Step 2 Select setting Step 3 Select Device version info Step 4 Check new version firmware and press OK ...

Страница 8: ...1 7 Step 5 Select update button Step 6 Start downloading firmware Step 7 Download from CDN Server During update do not off Bluetooth connection Step 8 Transfer FW ...

Страница 9: ...do not turn off the set Step 10 Update is completed CAUTION Transfer firmware from Phone to Set during upgrade you can see rotating of white LED of the set When upgrade is finished all LED are blinks and off and then Music Flow set is power off ...

Страница 10: ...TION FOR EEPROM 1 PHONE SETTINGS 1 Enable Bluetooth of the mobile device 2 Change name of mobile device in BLUETOOTH SETTNG MENU 3 Enable discoverable mode of mobile device 4 And setting the discoverable time to unlimited ...

Страница 11: ... 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 USB device must be unplugged when the downloading process is completed How to update MCS program 1 Fast format USB stick 2 Copy Firmware file to USB stick 3 Insert US...

Страница 12: ...11 1 CONNECTION OF THE JIG Caution Jig cable is same with SoundPlate LAP340 1 Insert the Jig cable in CN904 CAUTION Be careful of the direction of cable PROGRAM UPGRADE USING DOWNLOAD JIG KURNC KI KI CDNG ...

Страница 13: ...the screws on the four points 4 Open the Battery Assembly 5 Please insert of another side of Jig cable at CN503 of main board CAUTION Be careful of the direction of cable 2 See the back side of set Remove rubber foot ...

Страница 14: ...1 13 6 Power on set Click Info key of home audio Remoto Control during 3 seconds Check Jig display USB 1 second No USB 7 Insert USB check Jig Display Firm W UP off ...

Страница 15: ...conds 5 You can see rotation of all LED in updating 6 If updating is finished all LED blink and off 7 Power off 3 EQ PROGRAM Download program file name EQ_PRG_xxxxxxx 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 CAUTION When downloading the file you should neither unplug t...

Страница 16: ...ry Communication Bluetooth Amplifier 10 W 10 W 4 Ω at 1 kHz THD 10 Speaker Type Built in Impedance Rate 4 Ω Rated Input Power 10 W Max Input Power 20 W Battery Battery capacity 2600 mAh Operating time is approx 8 hours Based on 30 volume 1 kHz signal 400 mV portable input and fully charged status It may vary depending on the battery status and operational conditions Design and specifications are s...

Страница 17: ...1 16 ...

Страница 18: ...TIONS 2 2 1 HOW TO DISASSEMBLE THE GRILLE 2 2 2 HOW TO DISASSEMBLE THE FRONT COVER 2 4 3 HOW TO REPLACE THE BATTERY 2 6 ASSEMBLY INSTRUCTIONS 2 10 1 HOW TO ASSEMBLE THE GRILLE 2 10 EXPLODED VIEWS 2 15 1 CABINET AND MAIN CHASSIS 2 15 2 PACKING ACCESSORY SECTION 2 17 ...

Страница 19: ...so as not to damage 2 Use a thin flat tool ex A flathead screwdriver recommended size within width 2 5 mm the Left end of the set to lift grille into the grille hole CAUTION Be careful not to damage the case 1 HOW TO DISASSEMBLE THE GRILLE 3 Repeat work twice top and bottom like Figure 1 1 ...

Страница 20: ...2 3 Figure 1 3 4 Remove grille in the opposite direction after holding grille CAUTION Careful you don t cut when to remove the grille ...

Страница 21: ...Remove the front screw 8 EA using a philips screwdriver 2 HOW TO DISASSEMBLE THE FRONT COVER Figure 2 2 2 After remove rubber foot on the bottom remove screw of the four edges of bottom screw using a philips screwdriver ...

Страница 22: ...2 5 Figure 2 4 Figure 2 3 4 Remove double sided Tape attached at cover front 3 Push inside to the battery hole and remove cover front ...

Страница 23: ...1 After remove foot on the bottom remove screw of the four edges of bottom screw using a phillips screwdriver 3 HOW TO REPLACE THE BATTERY 2 Remove the Battery Assembly to release the hook using the driver Figure 3 2 ...

Страница 24: ...2 7 Figure 3 3 Figure 3 4 3 Prepare new Battery Assembly 4 Make the wire straight and mount the wire on the wafer to use driver ...

Страница 25: ...2 8 Figure 3 6 Figure 3 5 6 Check the wire arrangement between the passive radiator and battery supporter silk print on the PCB 5 Push the jack of the wire to hooking using driver ...

Страница 26: ...2 9 Figure 3 7 7 Close the Battery Assembly fix the screw and assemble the rubber foot ...

Страница 27: ... Figure 4 1 1 Set is placed on top of soft sheet so as not to damage CAUTION Before assemble grille remove double sided Tape attached at cover front surely 1 HOW TO ASSEMBLE THE GRILLE 2 Remove release paper of double sided Tape at grille ...

Страница 28: ... Figure 4 3 Figure 4 4 3 Bend the position of 1 0 1 5 mm from outskirt line the of grille rib refer to guide line inwards 0 5 1 0 mm as in figure 4 Bend both short ribs as in figure Guide Line Before After ...

Страница 29: ...4 6 5 When viewed from the front of set match the Right of cover rear and lengthy rib of grille and push lightly 6 Match the Left of cover rear and short two ribs of grille and push lightly CAUTION When assemble grille be careful Wide side is Top Narrow side is Bottom ...

Страница 30: ...2 13 Figure 4 7 Figure 4 8 7 Prepare tool of strengthen material and soft sheet 8 Before you press the set tool is placed on top of soft sheet above of grille FLAT TOOL SOFT SHEET 1 SOFT SHEET 2 SET 1 2 ...

Страница 31: ...2 14 1 2 1 Figure 4 9 Figure 4 10 9 Press using weight at outskirts of grille Red Line 10 Procedure Left Right of set White Line front of set Red Line finally press Left Right of set White Line one more ...

Страница 32: ... A44 515 BT B A52 CABLE4 515 252 259 EXPLODED VIEWS 1 CABINET AND MAIN FRAME SECTION The mark replacement grill two orders Loc No 250 Please refer to Disassembly Instructions Guide when disassembled the Grille 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 ...

Страница 33: ...803 Packing 803 Packing 820 USB Data cable 801 Owner s manual 833 AC adapter 802A Accessory box 802B Inner box 802C Box 3 PACKING ACCESSORY SECTION ...

Страница 34: ...3 9 4 PAIRING BLUETOOTH 3 10 5 KEY LED 3 10 WAVEFORMS OF MAJOR CHECK POINT 3 11 1 DSP 3 11 2 ADC 3 11 3 BLUETOOTH 3 12 4 AMP 3 12 WIRING DIAGRAM 3 13 BLOCK DIAGRAMS 3 15 1 SYSTEM BLOCK DIAGRAM 3 15 2 POWER BLOCK DIAGRAM 3 17 CIRCUIT DIAGRAMS 3 19 1 MAIN DSP ADC AMP CIRCUIT DIAGRAM 3 19 2 MAIN POWER CHARGER CIRCUIT DIAGRAM 3 21 3 JACK CIRCUIT DIAGRAM 3 23 CIRCUIT VOLTAGE CHART 3 25 PRINTED CIRCUIT ...

Страница 35: ...when you power on the main set 1 1 Solution Check and replace IC902 on main board 1 2 How to troubleshoot Countermeasure 1 Check 3 4 VA L501 L501 is not 3 4 VA replace IC902 2 Check X501 Crystal If it does not oscillate replace X501 Main board bottom view L501 L501 IC902 IC902 Main board top view X501 X501 ...

Страница 36: ...C500 on main board 2 2 How to troubleshoot Countermeasure 1 Check solder of JK300 2 Check input voltage of IC500 L503 C504 L503 should be 3 3 V L504 should be 5 V 3 Check if signal enters pin13 and pin14 of IC500 Check if signal comes out from pin8 and pin9 of IC500 If it doesn t work replace IC500 Main board bottom view Jack board top view IC500 IC500 JK300 JK300 ...

Страница 37: ... Check and replace CN502 on main board 3 2 How to troubleshoot Countermeasure 1 Check if Bluetooth module is in pairing state with your device 2 Check connection of CN502 and Bluetooth module 3 Check input voltage of CN502 pin10 It should be 3 4 V 4 If voltage is 3 4 V replace Bluetooth module 5 If It is still out of order after this process replace main board assembly CN502 CN502 ...

Страница 38: ... Battery is not charged 4 1 1 Solution Check and replace IC906 on main board 4 1 2 How to troubleshoot Countermeasure 1 Check both end voltage of R931 It should be 22 25 mV 2 Check pin2 and pin3 of IC906 It should be 9 6 V 3 Check pin2 of IC906 It should be 3 3 V 4 It doesn t work replace IC906 IC906 IC906 ...

Страница 39: ... is not charged 4 2 1 Solution Check and replace IC300 on jack board 4 2 2 How to troubleshoot Countermeasure 1 Check connection of CN301 and CN900 2 Check voltage of CN301 pin11 pin14 and CN900 pin7 pin10 It should be 9 6 V If voltage is not 9 6 V replace IC300 Jack board top view IC300 IC300 ...

Страница 40: ...01 Is the input voltage 1 2 VA L509 Is voltage of IC902 3 4 V Is the input voltage 3 4 VA L501 Is voltage of the battery above 6 5 V CN901 NO NO NO NO NO YES YES YES YES YES Power AMP Connect CN901 Replace IC907 OK Charge the battery Check connection of CN901 Does 13 V flow IC700 Check pin2 3 34 35 Is voltage of the battery above 6 5 V CN901 NO NO NO YES YES YES ...

Страница 41: ...nect adapter cable Does 9 6 V come out CN301 pin11 12 13 Replace IC902 Does 9 6 V enter IC906 Check pin2 3 IC906 is HIGH Check pin9 Red LED of power key blink Check the connection of adapter cable NO YES YES NO NO NO If it still doesn t work NO Check connection of CN900 and CN301 Does 5 V come out CN300 pin1 Check connection of CN901 YES NO YES NO YES YES YES NO ...

Страница 42: ...ce IC501 Replace main board assembly Replace L701 Replace IC700 Replace IC901 Check 3 3 V L701 Is PDN signal LOW Pin19 of IC700 Check connection of CN700 Check I2C of IC700 R714 R715 Does 13 V flow IC700 Check pin2 3 34 35 Check I2S of IC700 Pin20 21 22 Is AMP_RST HIGH state R719 NO NO NO NO NO NO NO NO NO Check output power Pin5 of IC901 Check IC501 output R528 Check switching signal Pin2 of IC90...

Страница 43: ...heck power Check DSP Check DSP Replace Bluetooth module Check power Check DSP Replace IC501 Check the connection of FFC Is input voltage 3 4 VA L501 Is BT_RST HIGH R504 Is voltage of L500 3 4 V Is control HIGH KEY R542 515 524 535 LED Pin3 of Q500 507 NO NO NO NO NO YES YES YES YES YES If it still doesn t work ...

Страница 44: ...MAJOR CHECK POINT 1 DSP 2 ADC 3 4 VA 1 2 VA Reset Crystal 24 MHz Figure 1 DSP Power Sequence 1 L501 3 4 VA 2 L509 1 2 VA 3 R558 RESET 4 R529 Crystal 24 MHz Figure 2 DSP TO ADC I2S 2 4 3 1 5 6 7 5 7 6 1 3 4 2 IC501 IC501 ...

Страница 45: ...3 12 3 BLUETOOTH 4 AMP Figure 3 Bluetooth I2C 8 BT_SCL 9 BT_SDA Figure 4 AMP I2C 10 AMP_SDA 11 AMP_SCL 9 8 11 10 8 9 11 10 ...

Страница 46: ...able DC JACK AUX IN 5 V DC IN 4 P 2 00 mm ST Locking SMD CN700 Battery CN901 5 P 2 00 mm ST Locking SMD CN502 CN301 20 P 0 5 mm AG SMD Locking FFC Harness CSR8811 SPK L SPK R KEY LED 10 P 1 mm AG SMD Locking RESET KEY 3 14 3 13 WIRING DIAGRAM ...

Страница 47: ...D 3 3 VA Key x5 LED x9 SD I2S DATA Charger BQ24133 Battery 7 4 V 2600 mA LDO LM37102 2 5 16 V 1 A MBRD10 N CH FET TPCA8A11 D G S TPS40210 COIL 3 3 uH DCDC Boost TPS61175 10 W 5 V 2 A AP7335 9 6 V 8 4 V 6 8 4 V 3 3 V 1 2 VA 1 2 V 3 3 V_BT 3 3 VS LDO AP7335 2 6 V 0 3 A PVDD 5 V Power control x3 3 4 VA 3 4 VA PWAKEUP PWR_CTRL BTPWR_CTRL PVDD Boost Block MCS CS8811 3 3 VA_BT For Jig CS1 CS2 AP7335x2 D...

Страница 48: ... 3 3 V_BT 50 mA Boost Controller DCDC Buck TPS563200 4 5 17 V 3 A 95 LDO AP7335 LDO AP7335 LDO AP7335 LDO AP7335x2 LDO AP7335 LDO LM37102 N CH FET TPCA8A11 3 3 VS 50 mA 3 3 VS 10 mA Input Current Max Set 0 9 A 8 6 W mUSB 9 6 V 0 93 A 9 W 5 V 2 A 10 W BAT_ 8 4 VA 0 85 A 7 14 W 8 4 V 0 89 A 7 5 W 6 8 4 V 9 6 V 0 9 A 8 6 W 15 mΩ 13 V 113 mA 1 47 W Charger BQ24133 95 13 V 192 mA 2 5 W 1 47 W 30 mΩ DCD...

Страница 49: ... 10 8 9 3 4 1 2 WAVEFORM NUMBER A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T DSP ADC AMP EAX66063201_Rev1 7 27 _SD1 2015 01 23 3 20 3 19 CIRCUIT DIAGRAMS 1 MAIN DSP ADC AMP CIRCUIT DIAGRAM ...

Страница 50: ... F G H I J K L M N O P Q R S T POWER CHARGER EAX66063201_Rev1 7 27 _SD2 2015 01 23 3 22 3 21 2 MAIN POWER CHARGER CIRCUIT DIAGRAM CAUTION DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE ...

Страница 51: ...A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T JACK EAX66064301_Rev1 7 27 _SD 2015 01 23 3 24 3 23 3 JACK CIRCUIT DIAGRAM ...

Страница 52: ...VDD 27 pin Spec PVDD 8 V 26 4 V DVDD AVDD 3 V 3 6 V Measure PVDD 13 V DVDD AVDD 3 3 V IC900 LDO Voltage Regulator AP7335 WG 7 82 Type SOT 25 R TP Vender DIODES INCORPORATED Vin 1 Pin Spec 2 V 6 V Measure Vin 3 4 IC901 LDO Voltage Regulator AP7335 WG 7 82 Type SOT 25 R TP Vender DIODES INCORPORATED Vin 1 Pin Spec 2 V 6 V Measure Vin 3 4 IC902 DC DC Converter TPS563200 Type SOT 23 R TP 6P Vender TEX...

Страница 53: ...3 28 3 27 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...

Страница 54: ...3 30 3 29 2 JACK P C BOARD TOP VIEW BOTTOM VIEW ...

Страница 55: ...3 32 3 31 ...

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