Manual de sevicio LG CM8420

8/18/2019 Manual de sevicio LG CM8420

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Mini Hi-Fi SystemSERVICE MANUAL

MODEL: CM8420 (CM8420, CMS8520F/W)CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”IN THIS MANUAL.

M ODE L :

C M

8 4 2 0 ( C M

8 4 2 0 , C M

S 8 5 2 0 F / W )

S E RV I C E MAN

UAL

3102,HCRAM76015220NFA:ON / P

Website http://biz.lgservice.comInternal Use Only


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CONTENTS

SECTION 1 ........GENERALSECTION 2 ........CABINET & MAIN CHASSISSECTION 3 ........ELECTRICALSECTION 4 ........REPLACEMENT PARTS LIST


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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 ........................................................................................................... 1-81. AUDIO PROGRAM ................................................................................................................................... 1-82. CD PROGRAM ......................................................................................................................................... 1-93. BEAT BOX PROGRAM........................................................................................................................... 1-104. EQ PROGRAM ....................................................................................................................................... 1-11

SPECIFICATIONS 1-12


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NOTES REGARDING HANDLING OF THE PICK-UP1. 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.

2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and

impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/ordamage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reasonthe adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

Storage in conductive bag Drop impact

NEVER look directly at the laser beam, and don’t allowcontact with fingers or other exposed skin.

SERVICING PRECAUTIONS


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NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) 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, componentscan be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must betaken, therefore, to avoid repair or storage where the temperature or humidity is high, where strong magnet-ism is present, or where there is excessive dust.

2. Notes for repair

1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.

When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This isbecause there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1 M Ω)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent stat-

ic electricity changes in the clothing to escape from the armband.

7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Resistor(1 M Ω)

Armband


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Electrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surfacesuch as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges 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 byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the

protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.

ESD PRECAUTIONS


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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 RCU Key : PLAY/PAUSE You can change [Audio MCU Version CD Controller Version EEPROM Option] by SKIP+/-.

3. Clear EEPROM Front Key : STOP RCU Key : SKIP-

4. Edit EEPROM Front Key : STOP RCU Key : SKIP+

You can change the digit of option by SKIP+/-. You can edit 0~f by REPEAT or PLAY/PAUSE key.

5. Bluetooth DUT Front Key : STOP RCU Key : PROGRAM Bluetooth model only

HIDDEN KEY MODE


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POWER ON

FLD no disc status

Remote control ‘ ’ + Front ‘STOP’push at a time for 5 seconds

FLD ‘OP-0….

Move to appropriate position andmake changes with remote control.

( , , / ■ , REPEAT )

Press STOP key

NAME

OP0 OP1 OP2 OP3

OP4 OP5 OP6 OP7 OP8 OP9

DETECT NEW EEPROM(OPTION EDIT SCREEN)

HEX

05000000000980022001

SERVICE INFORMATION FOR EEPROM


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3. BEAT BOX PROGRAM

Download program file name must be BEAT_BIN_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storagedevice 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 otherfunction, nor power off the device. Usb device must be unplugged when the downloadingprocess is completed.

ON VFD DISPLAY SCREEN

NO USB

↓ ← Insert usb device at usb functionREAD

↓FIRMWARE

↓

FINISH


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4. EQ PROGRAM

Download program file name must be EQ_PRG_CM8520_CMS8520_201201033_7009.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storagedevice 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 otherfunction, nor power off the device. Usb device must be unplugged when the downloadingprocess is completed.

ON VFD DISPLAY SCREEN

NO USB

↓ ← Insert usb device at usb functionREAD

↓EQ DOWNLOAD

↓

UPDATED


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SPECIFICATIONS• GENERAL

Power requirements Refer to main labelPower consumption Refer to main labelDimensions (W x H x D) 285 x 395 x 381Net Weight (Approx.) 6.2 kgOperating temperature 5 °C to 35 °C (41 °F to 95 °F)Operating humidity 5 % to 90 %Bus Power Supply USB DC 5 V 500 mA

• INPUTS

AUX IN 2.0 Vrms (1 kHz, 0 dB), 600Ω

, RCA jack (L, R) x 1PORT. IN 1.2 Vrms (3.5 mm stereo jack)

• TUNERFM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHzAM Tuning Range 522 to 1 620 kHz, 520 to 1 710 kHz or 522 to 1 710 kHz

AMPLIFIERStereo mode 310 W + 310 W (4 Ω at 1 kHz, THD 10%)

Surround mode Front 310 W + 310 W (4Ω

at 1 kHz, THD 10 %) Subwoofer 310 W + 310 W (4 Ω at 1 kHz, THD 10 %)

• CDFrequency Response 40 to 20 000 HzSignal-to-noise ratio 75 dBDynamic range 80 dB


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SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (DVM-H1803) ........................ 2-21. ORDER OF DISASSEMBLY FOR MECHANISM DECK .......................................................................... 2-22. ORDER OF ASSEMBLY FOR MECHANISM DECK ................................................................................ 2-6

EXPLODED VIEWS ................................................................................................................................... 2-111. CABINET AND MAIN FRAME SECTION (CM8420) .............................................................................. 2-112. MECHANISM DECK SECTION (DVM-H1803) ....................................................................................... 2-13

3. PACKING ACCESSORY SECTION ....................................................................................................... 2-154. SPEAKER SECTION .............................................................................................................................. 2-16


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DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (DVM-H181. ORDER OF DISASSEMBLY FOR MECHANISM DECK

Figure 1

1) Disassemble the Cover Guide Disc.

2

2) Disassemble the Loading FFC from the Main PCBAssy.Turn the Gear in OPEN direction as shown in Figure 2to take out the Tray Loading Assy in 3 direction.


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ORDER OF DISASSEMBLY FOR MECHANISM DECK

2

14) Loosen the screw to pull up and disassemble theTray Disc.

Figure 4

5) Loosen the screw to pull up and disassemble theGear Tray CAM.


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3

1

2

Figure 7

7) Disassemble the FFC Cable from the Base Main.Disassemble the Base Sled Assy from the Base Main

by referring to Figure.2

1


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1

2

4

10) Use a solder to remove the Motor Jump Wire fromthe Main PCB Assy and then disassemble the FFCCable.Loosen the screw to disassemble the Main PCB Assy.


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2. ORDER OF ASSEMBLY FOR MECHANISM DECK1) Assemble the Loading Motor Assy to the BaseMain.(When assembling the Motor Assy, use the hook onthe surface of the Base Main to preassemble, and thentighten the screws.)

Figure 1

12

3

2) Set the Guide UD on the Base Main.After setting the part, push it in direction 3.


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3) Set the Gear Loading 1 and Gear Pulley 2 on theBase Main.Hang the belt between the Gear Pulley and Motor Pul-ley.Assemble the Clamp Disc, Clamp Magnet and CoverPlate to the Base Main.

4) After setting the Gear Main 2, Gear Pu Up 3 and GearPu Down 4 on the Base Main, tighten the screws.After assembling the Gear Main, align the location asshown in Figure.

ORDER OF ASSEMBLY FOR MECHANISM DECK

1

2

Figure 3

1


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1

2

2

1

3

1


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2

1



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1

1



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2. MECHANISM DECK SECTION (DVM-H1803)MEMO

A02

A01

153A

035A

151

443

A26

443

443

417

153

159

155

156

177

182

417

417

417

001

002

003173

172

166

167

164 175

440

012

137

012

012

012

010

180

438

035

162

163

165

422

422

442

442

442

442


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801 Owner’s Manual

808 Battery

900 Remote Control

824 AM Loop Antenna

825 FM Wire Antenna

803 Packing

A A A

A A A

3. PACKING ACCESSORY SECTION


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A60LA60R

4. SPEAKER SECTION 4-1. FRONT SPEAKER (CMS8520F)


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MEMO


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SECTION 3 ELECTRICAL

CONTENTS

TRAINING MASTER ................................................................................................................................... 3-21. NO SOUND FROM SPEAKERS ............................................................................................................ 3-22. NO SOUND IN AUX FUNCTION ............................................................................................................ 3-33. NO SOUND IN PORT. IN FUNCTION ................................................................................................... 3-44. NO SOUND IN IPOD FUNCTION .......................................................................................................... 3-55. NO SOUND IN AM/FM FUNCTION ....................................................................................................... 3-66. NO SOUND IN CD FUNCTION .............................................................................................................. 3-77. NO SOUND IN USB FUNCTION ............................................................................................................ 3-98. NO POWER .......................................................................................................................................... 3-10

ONE POINT REPAIR GUIDE ................................................................................................................. 3-111. NO POWER .......................................................................................................................................... 3-112. NO BOOTING WHEN POWER ON THE SET ..................................................................................... 3-133. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ................................................................... 3-144. NO BOOTING IN CD/USB FUNCTION ................................................................................................ 3-155. NO OPERATION OF MD ..................................................................................................................... 3-206. NO SOUND .......................................................................................................................................... 3-26

ELECTRICAL TROUBLESHOOTING GUIDE .................................................................................. 3-341. POWER SUPPLY ON SMPS BOARD ................................................................................................. 3-342. SYSTEM PART .................................................................................................................................... 3-383. NO AUDIO PART ................................................................................................................................. 3-394. DIGITAL AUDIO AMP CHECK ............................................................................................................. 3-445. NO LIGHTING (WOOFER SPEAKER) ................................................................................................. 3-45

WAVEFORMS 3-46


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Are the speaker cables connected correctlybetween the speaker terminals on the unit

and the speakers?

Make sure to connect the cables to each specifiedconnector tightly on the unit.

Connect the woofer cables to the WOOF SYSTEMconnectors on the rear panel.

YES

NO

Does the customer select correctlythe input function he or she wants to listen to?

Make sure to connect some cables like A/V cablesand FM/AM antenna cables.

YES

NO

After pressing FUNCTION,is “CD, USB, AUX, IPOD, AM or FM” displayed?

Make sure to select the desired input functionpressing FUCTION button.

YES

NO

Turn the master volume clockwisefor the volume up.

The volume level LEDs around the master volumewill be turned on more and more

while turning it clockwise for the volume up.

YES

NO

1. NO SOUND FROM SPEAKERS

TRAINING MASTER


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Does the customer select correctlythe AUX function he or her wants to listen to?

Make sure to connect some cablesbetween the AUX IN jacks of the unit

and the Audio output jacks of a external Audio device.

YES

NO

After pressing the FUNCTION, is “AUX” displayed on VFD?

Make sure to select the AUX IN functionpressing the AUX/IPOD/PORT. IN button.

YES

NO




YES

NO

Is there any soundfrom the selected input source?

Refer to a device’s instruction manualand then check if there is sound outputfrom it connecting another audio system

YES

NO

2. NO SOUND IN AUX FUNCTION

TRAINING MASTER


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Does the customer select correctlythe PORT. IN function he or her wants to listen to?

Make sure to connect a cablebetween the PORT. IN jack of the unit and the Audio

output jack of a portable device like a MP3 player.

YES

NO

Is “PORT. IN” displayed on VFD?Make sure to select the PORT. IN functionpressing the AUX/IPOD/PORT. IN button.

YES

NO




YES

NO

Is there any soundfrom the selected input source?

Refer to a portable device’s instruction manualand then check if there is sound output

from it connecting another audio system.

YES

NO

3. NO SOUND IN PORT. IN FUNCTION

TRAINING MASTER


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Does the customer select correctlythe AM/FM function he or she wants to listen to?

Make sure to connect AM/FM antennason the rear panel of the unit.

YES

NO

Is “AM or FM” displayed on VFD? Make sure to select AM or FM function

pressing the TUNER button.

YES

NO

After tuning a desired channelusing the TUNING± button,

is the sound quality good to listen to the music?

To prevent noise pickup, keep the AM Loopantenna away from the unit and other components.Be sure to fully extend the FM wire antenna. After

connecting the FM wire antenna, keep it horizontal.

YES

NO

Is the signal strength of the radio station too week? Make sure to tune the station manually.

YES

NO

5. NO SOUND IN AM/FM FUNCTION

TRAINING MASTER


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Does the customer select correctlythe CD function he or she wants to listen to? Make sure to put on a CD disc on the tray.

YES

NO

Is a CD disc put on the tray correctly? Make sure to insert the CD disc upside down.

YES

NO

Does the unit display “NO DISC” on VFDwhen a disc is inserted on the tray?

Place the disc with the labelor printed side facing upwards.

YES

NO

Does the customer usethe supported mp3 or WMA music files on the disc?

Check the playable disc.Make sure that the file extensions

are “.mp3” or “.wma”.

YES

NO

6. NO SOUND IN CD FUNCTION

TRAINING MASTER


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YES

NO

NO

TRAINING MASTER

Are the speaker cables connected correctlybetween the speaker terminals on the unit

and the speakers?

Maker sure to connect the cablesto each specified connector tightly on the unit.

Connect the woofer cables to the WOOF SYSTEMconnectors on the rear panel.

YES

NO

The sound is output from the speakers. Sound OKNO

YES

TRAINING MASTER


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Does the customer select correctlythe USB function he or she wants to listen to? Make sure to insert a USB into the USB ports.

YES

NO

Is “USB” displayed on VFD? Make sure to select the USB function

pressing the CD/USB button.

YES

NO

Does the unit display “SELECTED” on VFDwhen a USB is inserted into the USB port?

When “No USB” is displayed,make sure that the customer uses the recommended

USB which support USB2.0 or USB1.1.

YES

NO

Does the customer use the supportedmp3 or WMA music files on the disc?

Check if it is the playable disc or not.Make sure that the file extensions are

“.mp3”or “.wma”.

YES

NO

7. NO SOUND IN USB FUNCTION

TRAINING MASTER


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The sound is output from the speakers. Sound OK

YES

NO

Is the power cord pluggedinto a electrical outlet?

Make sure to plug the power cord of the unitinto a electrical outlet.

YES

NO

Does the Standby LED lightin red color?

If the customer can not see the red lighton the front panel, the SMPS might have any problem.

Please solve the problemreferring to the service manual.

YES

NO

8. NO POWER

TRAINING MASTER


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ONE POINT REPAIR GUIDE

1. NO POWERIf the unit doesn’t work by no power problem, repair the set according to the followingguide.

1-1. FUSE & BRIDGE DIODE1-1-1. SolutionPlease check and replace F901, BD901, TH901, TH902 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)1) Check if the fuse F901 is open or short-circuit.2) Check if the bridge diode BD901 is short-circuit by over current with a digital multi meter.3) Check if the NTC thermistor TH901 and TH902 is normal or open.


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NO POWERIf the unit doesn’t work by no power problem, repair the set according to the followingguide.

1-2. D951 / D952, ZD9511-2-1. SolutionPlease check and replace D951 / D952, ZD951 on SMPS board.

1-2-2. How to troubleshoot (Countermeasure)1) Check the Anode-Cathod Voltage of D951 / D952 with a digital multi-meter, it is normally 0.2 ~ 0.3 V. If it doesn’t have any voltage, it’s destroyed. Replace it with a new one.2) Check if ZD951 is short-circuit. If it is short-circuit, and then replace it with a new one.

1-2-3. Service hint (Any picture / Remark)


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2. NO BOOTING WHEN POWER ON THE SETThe set doesn’t work when press the power button on the front board or the remotecontrol.

2-1. FLASH MEMORY (IC101)2-1-1. SolutionPlease check and replace IC101 on MAIN board.

2-1-2. How to troubleshoot (Countermeasure)1) Check the 3.7 VA to CN102, CN103, and CN104 in standby mode. If there is no 3.7 VA, check the SMPS.2) Check 5.6 VA, 12 VA, FL+, FL- and 32 V when power on the set. - If the set doesn’t work regardless of what the KEY1 changes high to low while pressing the power

button. X100 and X101 work normally but, if you can not power on the set, replace the IC101 with a newone on the main board.



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3. VFD IS NOT DISPLAYED WHEN POWER ON THE SETWhen power on the set, any icons or characters on VFD are not displayed.

3-1. VFD3-1-1. SolutionPlease check and replace DIG301 on FRONT board.

3-1-2. How to troubleshoot (Countermeasure)1) Check if 32 V, FL+ and FL- are output from SMPS to VFD via the MAIN board.2) Check if the IC101 outputs VFD_RST, VFD_CLK, VFD_STB, and VFD_STB to the FRONT board.3) Check if the VFD grid current amplifier circuit (Q301, Q303, Q304) on the FRONT board. Check the drive signal to the transistor’s base. If the control signals from VFD (TP302, TP303, TP304) isn’t output, replace VFD with a new one. If the transistor doesn’t work, replace it.



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4. NO BOOTING IN CD/USB FUNCTIONAfter 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. NO VCC33, VCC124-1-1. SolutionPlease check and replace IC505, IC509 on MAIN board.

4-1-2. How to troubleshoot (Countermeasure)1) Check Voltage of IC505 pin2 on MAIN board. If IC505 pin2(about 4.9 V) & D501 Input 5.6 VA doesn’t come out, check 5.6 VA from SMPS board.2) If IC505 pin2(about 4.9 V) is normal, check the PWR_CTRL(IC505 pin1) is high (about 3.3 V). If PWR_CTRL isn’t high, check pin63 of IC101 & R149,R503.3) If PWR_CTRL is high, check R592, R593 and if there’s no defective component then replace IC505.4) If 3.3 V(VCC33) is normal, check output(pin2, 4) voltage of IC509. If 1.2 V of IC509 pin2,4 doesn’t come out, then replace IC509.


IC509IC505


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NO BOOTING IN CD/USB FUNCTIONAfter 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. CRYSTAL (X501)4-2-1. SolutionPlease check and replace X501 on MAIN board.

4-2-2. How to troubleshoot (Countermeasure)1) If 3.3 V & 1.2V is normal, check Reset ‘High’ of IC501 pin153 on MAIN board. If MAIN_RESET isn’t high, check MICOM(IC101) pin59.2) If MAIN_RESET is high, check the soldering status of 12 MHz crystal (X501).3) If the crystal(X501) doesn’t oscillate, check R541,R542,C517,C518 around crystal(X501). If there’s no defective component, then replace X501.


IC501

R546


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4-3. SERIAL FLASH (IC503)4-3-1. SolutionPlease check and replace IC503 on MAIN board.

4-3-2. How to troubleshoot (Countermeasure)1) If the crystal(X501) does oscillate, check serial flash(IC503) on MAIN board. Check pin8(VCC), pin6(CLK), pin1(CS#), pin2(DO), pin5(DI) of below waveform.2) If pin1, 2, 5, 6, 8 doesn’t come out, check damping resistor(R511, R513, R514, R515) of IC503. If damping resistor of IC503 is OK, then replace IC503. (it need to download program)3) After change IC503, if It is still not below waveform, check IC501(DSP IC).


VCC

CLK

DO

CS#


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4-5. DSP IC (IC501: MLC3700)4-5-1. SolutionPlease check and replace IC501 on MAIN board.

4-5-2. How to troubleshoot (Countermeasure)1)After check them by previous pages about NO Booting, if the set is still no booting, Check soldering status of IC501. Check boot strap option(R598, R594, R597) of IC501(DSP IC).2) If below bootstrap waveform doesn’t come out, then replace IC501(DSP IC).


R594PGPB12(Yellow)

R598


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NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the servo motors in MD don’t work. This step is for checking theSLED MOTOR among them.

5-2. SLED MOTOR5-2-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

5-2-2. How to troubleshoot (Countermeasure)1) Check the SLDO signal from Pin15 of IC407. If no signal, check 3.3 V(RF) and X402.2) Check the SLED+ & SLED- from IC408 to CN405 for driving SPINDLE motor. It is about 2.9 Vp-p. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the sled motor is sort-circuit or has any trouble, it can not move the pick-up module. Please check the function after changing another MD.



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NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the servo motors in MD don’t work. This step is for checking theTRAY MOTOR among them.

5-3. TURRET MOTOR5-3-1. SolutionPlease check and replace IC406, IC407 on MAIN board.

5-3-2. How to troubleshoot (Countermeasure)1) Check TUR+ & TUR- signals from Pin60 & 61 of IC501 to IC406. If no signal, check +5 V to IC406.2) Check TUR_M+ & TUR_M- from IC406 to CN405 for driving turret motor. It is about 3.8 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not rotate the tray. Please check the function after changing another MD.



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NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the servo motors in MD don’t work. This step is for checking theTRAY OPEN/CLOSE MOTOR among them.

5-4. TRAY OPEN / CLOSE MOTOR5-4-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

5-4-2. How to troubleshoot (Countermeasure)1) Check MOT_OPEN & MOT_CLOSE signals from Pin62 & 63 of IC501 to IC408. If no signal, check +1.8 V & + 5 V to IC408.2) Check LOAD± from IC406 to CN405 for driving the tray open / close motor. It is about 3.85 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not open or close the tray. Please check the function after changing another MD.



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NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the pickup module in MD doesn’t work. This step is for checking theLASER TRACKING ACTUATOR.

5-5. LASER TRACKING ACTUATOR5-5-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

5-5-2. How to troubleshoot (Countermeasure)The tracking actuator makes the laser beam be positioned in the center of a track on CD disc.1) Check the TRD signal from Pin14 of IC407. If no signal, check 3.3 V(RF) and X402.2) Check T- & T+ from IC408 to CN404 for driving the tracking actuator. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN404 and MD.4) Check the MD. If the pick-up module has any trouble, it can not move the laser beam on the left or right side. Please check the function after changing another MD.



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NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the pickup module in MD doesn’t work. This step is for checking theLASER FOCUSING ACTUATOR.

5-6. LASER FOCUSING ACTUATOR5-6-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

5-6-2. How to troubleshoot (Countermeasure)The focusing actuator makes the laser beam keep a regular interval with the surface of a CD disc.1) Check the FOD signal from Pin13 of IC407. If no signal, check 3.3 V(RF) and X402.2) Check F- & F+ from IC408 to CN404 for driving the focusing actuator. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN404 and MD.4) Check the MD. If the pick-up module has any trouble, it can not move the laser beam on the top or bottom side. Please check the function after changing another MD.



55/107


56/107


NO SOUNDThere is no sound output in the USB FUNCTION, repair the set according to the fol-lowing guide.

6-2-1. IN THE USB FUNCTION6-2-1-1. SolutionPlease check and replace IC501, IC504 on MAIN board & IC3U01 on USB board.

6-2-1-2. How to troubleshoot (Countermeasure)1) Check +5VU to USB board. If +5.6VA to pin2 of IC3U01(LDO) doesn’t come out, check pin21~23 of CN103. If +5.6VA is normal & +5VU of IC3U01 pin3 doesn’t come out, then replace IC3U01.2) Check USB D± from main board to USB board. a. Check USB_HUB_DN/DP signals to IC501(pin16, 17) b. Check USB1/2_DN/DP signals from IC504 to CN502 (pin1, 2, 4, & 5) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to

the IC is distorted or no signal, replace it with a new one.3) Check if “Digital audio AMP block”.

6-2-1-3. Service hint (Any picture / Remark)

USBUSB

BoardIC504

USB2512B

USB1_D+/-USB2_D+/-

USB_D+/-


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58/107


NO SOUNDThere is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set accordingto the following guide.

6-3. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS)6-3-1. SolutionPlease check and replace IC701, IC702, IC703 on MAIN board.

6-3-2. How to troubleshoot (Countermeasure)1) Check FL±, FR±, RL±, RR±, SW1±, & SW2± signals from IC602 to IC701, IC702 & IC703 each input

function. If no signal, check if I2S audio signals are entered to IC602. Refer to “I2S audio signal interface”.2) Check PVDD_50V. If 50 V is abnormal, check the SMPS.3) Check +12 for driving the gate of AMP IC. a. All the powers are normal, but if +12 V is low, there is possible for AMP IC to be damaged. b. Remove a ferrite bead among FB703, FB707 and FB713 one by one. When removed a ferrite bead, if +12 V is recovered, the IC connected to it was damaged.

c. Replace the IC with a new one.4) Check the impedance between SPK+ & GND and SPK- & GND. a. If the impedance is 0 Ω , the IC must be damaged. b. After removing the heat sink, replace it with a new one.Comments !!If a AMP IC among three is damaged, “AMP_PDN” to R103 changes HIGH to LOW at regular intervals.The sound is not output by AMP power down function



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NO SOUNDThere is no sound output in the AUX FUNCTION, repair the set according to the fol-lowing guide.

6-4. IN THE AUX FUNCTION6-4-1. SolutionPlease check and replace IC202 on MAIN board.

6-4-2. How to troubleshoot (Countermeasure)1) Check AUX_L/R signals to IC202 (Pin7, 8).

2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.4) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 6-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one.


AUX IC202

CS5346

AUX_L/R



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NO SOUNDThere is no sound output in the PORT. IN FUNCTION, repair the set according to thefollowing guide.

6-5. IN THE PORT. IN FUNCTION6-5-1. SolutionPlease check and replace IC202 on MAIN board.

6-5-2. How to troubleshoot (Countermeasure)1) Check PT_L/R signal from Main board to USB board.

2) Check if PT_LR is entered from Pin1 & 3 of CN3M01 to Pin1 & 3 to CN202.3) Check POT_L/R signals to IC202(Pin21, 22).4) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.5) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.6) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to

the IC is distorted or no signal, replace it with a new one.7) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one


IC202 POT.INMICPOT_L/R



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NO SOUNDThere is no sound output in the TUNER FUNCTION, repair the set according to thefollowing guide.

6-6. IN THE TUNER FUNCTION6-6-1. SolutionPlease check and replace IC202, TU101 on MAIN board.

6-6-2. How to troubleshoot (Countermeasure)1) Check if TUNER_LR is entered from Pin1 & 3 of T1U01 to IC202(Pin23, 24). If no signals, Check +3.3 V for Tuner power. Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC101 to TU101. If it doesn’t work, replace TUNER with a new one.2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.4) Check the following I2S audio signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to

the IC is distorted or no signal, replace it with a new one.

5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one.




62/107


NO SOUNDThere is no sound output in the MIC IN FUNCTION, repair the set according to thefollowing guide.

6-7. IN THE MIC IN FUNCTION6-7-1. SolutionPlease check and replace IC603, IC605 on MAIN board.

6-7-2. How to troubleshoot (Countermeasure)1) Check MIC_SIG signal to Pin6 of CN601. If no signal, Check the signal to Pin6 of CN3M01 on the MIC board.Check if the signal is entered from Pin6 of CN3M01 to MAIN board.2) Check if MIC_SIG is entered from Pin6 of CN601 to pin3 of IC605 (MIC AMP).3) Check if the amplified signal is entered from pin4 of IC605. If no signal output, check +12 V for IC605, replace IC605 with a new one if it has a problem.4) Check if MIC_BCK & MIC_LRCK is entered from IC507 to IC603 and DAC_MLCK from IC501 to IC603. Check if MIC_DATA is entered from Pin9 of IC603 to pin7 of IC602. If no signal, check +5 V & +3.3 V for IC603. If it is abnormal, change replace it a new one.6) Check the following I2S signal flow from IC603 to IC602. If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one.7) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one.


ELECTRICAL TROUBLESHOOTING GUIDE


63/107


1. POWER SUPPLY ON SMPS BOARD

YES

YES

YES

YES

No output 5.7 VA

Replace F901 (same fuse).

Replace D904.

Replace BD901.

Replace D933, D937.

NO

NO

NO

NO

F901 normal?

D904 normal?

BD901 normal?

D933, D937 normal?



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YES

YES

YES

YES

No output 12 V

Replace F901 (same fuse).

Replace D904.

Replace BD901.

Replace D934, D935.

NO

NO

NO

NO

F901 normal?

D904 normal?

BD901 normal?

D934, D935 normal?


65/107



66/107


No AMP Output

Check 3.3 V & P-CTRL.

Replace ZD912, ZD913.

Replace D951, D952.

Replace D904, Q901, PC911.

Is theVCC supplied to

IC911 Pin7?

ZD912, ZD913OK ?

D951, D952OK ?

NO

NO

NO

NO

NO

P-CTRL OK?

Q901,D904OK?

YES

YES

YES

YES



67/107


Power on.

Check FFC cable (17P).

Check MAIN board.

Check SMPS board.

Replace DIG301.Q301, 303, 304grid voltage OK?

“HELLO”Display on FLD

OK?NO NO

NO

NO

NO

CN301cable connection

OK?

CN301Pin8, 9, 10 data signal

OK?

CN301Pin15, 16, 17 power

OK?

2. SYSTEM PART

YES YES

YES

YES



68/107


CD FUNCTION

Is motor_open/ close OK?(IC408 Pin9,10)

Check IC408.

Check IC501.

Check Loading motor.

OPU driving(Focusing & Tracking) OK?

Is motor impedanceabout 12 Ω?

Candisc insert?

Disc reading OK?NO

NO

NO

NO

NO

Focusing/Tracking/ Sled Signal

OK?

LOAD +- OK?

YES

NO

YES YES

3. NO AUDIO PART



69/107


USB play

Check IC501.

Replace IC3U01.

IC501Pin16,18 USB_HUB_D output

signal OK?

NO

NOIC3U01USB power +5 VUOK?

YES

A

When insertUSB,IC504 Pin1,2,3,4 USB_D

signal OK?

NO

YES

YES



70/107

A

YES

YES

YES

POT. IN

Check MIC board.

Replace IC202.

Check IC501.

NO

NO

NO

IC202Pin21,22 POT. IN input signal

OK?

IC202Pin41 ADC data output signal

OK?

IC202Pin42,43,44 I2S input signal

OK?


71/107



72/107

A

YES

YES

YES

YES

Replace IC501.

Replace IC507.

Check IC507.

Check IC501.

NO

NO

NO

NO

IC501Pin4, 5, 6 I2S data output

signal OK?

IC507Pin7,14 BEAT_LRCK/BCK output

signal OK?

IC507Pin2, 17 DAC_BCK/LRCK input

signal OK?

IC501Pin6 BEAT_DAC_DATA output

signal OK?



73/107

4. DIGITAL AUDIO AMP CHECK

B

Replace IC602.

Check IC801 & IC501.

Check IC602. Check IC602.

IC602PWM data output signal

OK?

IC602I2S input signal

OK?

IC701FL± / FR± input signalOK?

IC703RL± / RR± input signalOK?

IC702SW1± / SW2± input signalOK?

NO

NO

NO NO

YES

YES

YES YESYES


74/107

CD/ USB play

Check Woofer SPK.

Replace IC601.

Check SMPS board.

Pin1 +3.3 V OK?NO NOCheck IC601 OK?

5. NO LIGHTING (WOOFER SPEAKER)

YES YES

Check SMPS board.

Check IC801.

Pin8 +12 V OK?

JK101,102 Pin 3,7I2C signal OK?

NO

NO

YES

YES

WAVEFORMS


75/107

1. SERVO WAVEFORM

Figure 1-1. CD-16MIC407 pin31

Figure 1-2. Servo - FE, TE, FOD, RFIC407 pin61, pin62, pin63 / IC408 pin1

FE

TE

FOD

RF


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2. MOTOR DRIVE WAVEFORM

Figure 2-1. SP- & SP+ for driving Spindle motorIC408 pin17, pin18

Figure 2-2. SL- & SL+ for driving Spindle motorIC408 pin11, pin12

SP- SL-

SP+ SL+


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3. AUDIO PATH WAVEFORM

Figure 3-1. CD-I2SIC407 pin34, pin35, pin36

Figure 3-2.IC501 pin95, pin96, pin97

BCK BCK

LRCK LRCK

DATA DATA


78/107

4. ADC WAVEFORM

Figure 3-5. AUDIO_L/R

AUDIO_L

AUDIO_R


79/107

5. IPOD WAVEFORM 6. USB WAVEFORM

7. CRYSTAL WAVEFORM 8. BEATBOX IC POWER SEQUENCE

Figure 5. iPod signalCN201 pin14, pin6, pin8, pin11

Figure 6. USB D+/D-CN502 pin1, pin2 & pin4, pin5

IPOD_DET

IPOD_READY

IPOD_RX

IPOD_L

D+

D-


80/107

9. VFD GRID CURRENT DRIVER

Figure 9.

MEMO


81/107

WIRING DIAGRAM


82/107

3-53 3-54

AMP AMP AMP

MOT

P/UP

BLOCK DIAGRAMS 1. SMPS BLOCK DIAGRAM

STR-A6053 for MAIN


83/107

3-55 3-56

DigitalPower AMP

FL

FR

SW

C

SL

SR

TRANS

MAIN&AMP

Filter Section

(Varistor,Resistor,Line Filter

Thermistor)

Rectifier Circuit(Bridge,

CAPACITOR)

AMP Power &

NCP1252Control IC

FETAC

Snubber

Main Power TRANS


84/107

CIRCUIT DIAGRAMS 1. SMPS CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NOCIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG CORPORATION. ALL COMPONENTSSHOULD BE REPLACED ONLY WITH TYPES IDENTICALTO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL

COMPONENTS ARE SHADED ON THE SCHEMATICFOR EASY IDENTIFICATION.THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFERFROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SET IS NOT DELAYED UNTIL THE NEW SERVICELITERATURE IS PRINTED.

NOTE :1. Shaded( ) parts are critical for safety.

Replace only with specified part number.2. Voltages are DC-measured with a digital voltmeter

during Play mode.

12


85/107

3-59 3-60

A

1

2

3

4

5

6

7

8

9

10

11

B C D E F G H I J K L M N O P Q R S T

CAUTION: Danger if fuse is incorrectly replaced.

Replace only with the type identical to fuse ratingand(or) model name described in main label.

WarningParts that are shaded are critical withrespect to risk of fire or electrical shock. SMPS

EAX64583501_Rev1.1-SD2012. 01. 09

2. MAIN - MICOM CIRCUIT DIAGRAM

12


86/107

3-61 3-62

A

1

2

3

4

5

6

7

8

9

10

11


MICOEAX64550401_Rev1.2-SD(#1

2012. 01. 0

3. MAIN - PWM / FILTER CIRCUIT DIAGRAM

12


87/107

3-63 3-64

A

1

2

3

4

5

6

7

8

9

10

11


PWMEAX64550401_Rev1.2-SD(#2)

2012. 01. 09

4. MAIN - IR AMP CIRCUIT DIAGRAM

12


88/107

3-65 3-66

A

1

2

3

4

5

6

7

8

9

10

11


AEAX64550401_Rev1.2-SD(#3

2012. 01. 0

5. MAIN - DSP / USB / IPOD CIRCUIT DIAGRAM

12


89/107

3-67 3-68

A

1

2

3

4

5

6

7

8

9

10

11


DSPEAX64550401_Rev1.2-SD(#4)

2012. 01. 09


90/107

7. MAIN - ADC CIRCUIT DIAGRAM

11

12


91/107

3-71 3-72

A

1

2

3

4

5

6

7

8

9

10

11


ADCEAX64550401_Rev1.2-SD(#6)

2012. 01. 09

8. MAIN - BEAT BOX CIRCUIT DIAGRAM

11

12


92/107

3-73 3-74

A

1

2

3

4

5

6

7

8

9

10


BEAT BOEAX64550401_Rev1.2-SD(#7

2012. 01. 0

9. FRONT - VFD CIRCUIT DIAGRAM

11

12


93/107

3-75 3-76

A

1

2

3

4

5

6

7

8

9

10


VFDEAX64550501_Rev1.3-SD

2012. 01. 09

10. FRONT - VOLUME CIRCUIT DIAGRAM

11

12


94/107

3-77 3-78

A

1

2

3

4

5

6

7

8

9

10


VOLUMEAX64550601_Rev1.3-SD

2012. 01. 0

11. FRONT - USB CIRCUIT DIAGRAM

11

12


95/107

3-79 3-80

A

1

2

3

4

5

6

7

8

9

10


USBEAX64550701_Rev1.3-SD

2012. 01. 09

12. FRONT - MIC CIRCUIT DIAGRAM

11

12


96/107

3-81 3-82

A

1

2

3

4

5

6

7

8

9

10


MIC & PORTABLEAX64550801_Rev1.3-SD

2012. 01. 0

CIRCUIT VOLTAGE CHART 1. ICs

No. IC Sym IC Name / Type Vcc/Vdd

1IC101

MICOM

LC87F5NC8A(SANYO)TYPE: 100PVENDER: SANYOVDD: 14, 40, 55, 89

Spec:VDD: +2.8 ~ +5.5V

Measured volt.: VDD: 3.392V

2

IC102IC103 AZ7027RTRE1TYPE: 3P

Spec:VCC: Max 18V


10

IC408

Motor Drive(5ch)

S3053TYPE:28PVENDER: AUKVCC1,2 :8,19

Spec:VCC1,2: 4.3 ~

13.2VMeasured volt.:

VCC1,2: 5.1V

MLC3700ATYPE:176P

Spec:VDD33,UVDDA33,PXI


19IC601

LDO

LM37102DTYPE: 8PVENDER: TAEJINVIN:2, Vout:3

Spec:Vin: +2.25 ~ +16V

Vout:+1.25 ~+15V

Measured volt.: Vin: 3.68V Vout:3.27V

Spec:


26IC803

BUFFER IC

74AHC244FTTYPE:20PVENDER: TOSIBAVIN:2,4,6,8,11,13,15,17Vout:3,5,7,9,12,14,16,18

Spec: VIN: 2~5.5V Vout: 0~VIN

Measured volt.: VIN: 3.28V Vout: 3.29V

MX25L3206EM2I-


97/107

3-83 3-84

2

Voltage detectors

TYPE: 3PVENDER: BCDVcc:1, Vout:3

Measured volt.: Vcc: 3.53V

3IC104

LDO

AZ1117BH-ADJTYPE:3PVENDER: BCDVIN: 3 VOUT: 2,4

Spec:Vin: Max 12V

Vout:Max 10VMeasured volt.:

Vin:5.65VVout: 3.68V

4

IC201

Noise IsolationAmplier

NJM2794RB2TYPE: 10PVENDER: JRCV+:4

Spec:VIN: 4.3~13VMeasured volt.:

VIN: 11.9V

5IC202

ADC

CS5346_ADCTYPE:48PVENDER: CIRRUSLOGICVA:14/ VD: 46/VLS: 36VLC: 5

Spec: VA: 4.75~5.25V VD: 3.13~3.47V VLS: 3.13~5.25V VLC: 3.13~5.25V

Measured volt.: VA: 5.1V VD: 3.29V VLS: 3.29V VLC: 3.29V

6IC203

LDO

LM37102DTYPE:8PVENDER:TAEJINVIN: 2 Vout: 3

Spec:VIN: 2.25V~16V

Vout:2.22~16.16V


7IC204

LDO


Spec:VIN: 2.25V~16V

Vout: 2.22~16.16VMeasured volt.:

VIN: 5.61 Vout: 5.02

8

IC406

Motor Drive(1ch)

S8082TYPE:8PVENDER:AUKPVCC,SVCC:6,7

Spec:PVCC,SVCC:4.3 ~ 13.2V

Measured volt.: PVCC,SVCC:5.1V

9 IC407

RF IC

BU9543KVTYPE:64P

VENDER: ROHM

DVDD,AVDD:1,17,33,47,53,59VDD_CORE: 26,37

Spec:DVDD,AVDD:

2.7V ~ 3.6V VDD_CORE:1.75 ~ 1.95V

Measured volt.: DVDD,AVDD:3.29V VDD_CORE:1.85V

11IC501

DSP

VENDER:MCSLOGIC

VDD33,UVDDA33,PXI_VDD33,ADCVDD33:1,14,20,22,2

6,36,50,87, 99,117,141,167VDD12:8,24,65,89,151,161

PXI_VDD33,ADCVDD33:+3.135 ~ +3.465VVDD12: +1.14 ~+1.26V

Measured volt.:VDD33,UVDDA33,PXI_VDD33,ADCVDD33:3.30VVDD12: 1.20V

12IC502

SDRAM

M12L64164ATYPE:54PVENDER: ESMT

VDD,VDDQ:1,3,9,14,27,43,49

Spec:VDD,VDDQ: +3.0 ~+3.6V

Measured volt.:VDD,VDDQ: 3.29V

13IC503

Serial Flash

MX25L8006EM2ITYPE:8PVENDER:MXVCC:8

Spec:VCC: 2.7V ~

3.6VMeasured volt.:

VCC: 3.29V

14IC504

USB HUB

USB2512BTYPE:36PVENDER:SMSCVDD33:

5,10,15,23,29,36

Spec:VDD: 3.0V ~

3.6VMeasured volt.:

VDD: 3.29V

15IC505

LDO

LM27152RSTYPE: 5PVENDER: TAEJINVIN:2, Vout:4

Spec:Vin: Max 26V

Vout:Max 25VMeasured volt.:

Vin: 5.65V Vout:3.29V

16IC506

CP CHIP

MFI337S3959TYPE:8PVENDER: APPLEVCC:9

Spec:VDD: 1.62V ~

5.5VMeasured volt.:

VDD: 3.29V

17IC507

BUFFER

74AHC244FTTYPE:20PVENDER:PhilipsVCC:20

Spec:Vcc: 2.0V ~ 5.5VMeasured volt.:

VDD: 3.29V

18IC509

LDO

AZ1117BH-1.2TRE1TYPE:3PVENDER:BCDVIN:3, Vout:2

Spec:Vin: Max 12V

Vout: 1.176 ~1.224V

Measured volt.: VDD: 3.29V Vout: 1.2V

20IC602

PWM Controller

PS9854TYPE: 68PVENDER: PULSUSVDD_IO:5,30,33,37,42,51VDD_IN1,2: 64,67

VDD_OUT1,2,VDD_core:1,63,60,45,22

Spec:VDD_IO:2.97~3.63VVDD_IN1,2:2.2~3.3VVDD_OUT,VDD_core: 1.08~1.32V

Measured volt.:VDD_IO: 3.27VVDD_IN1,2: 3.27VVDD_OUT,VDD_core: 1.25V

21IC603

ADC

AK5358TYPE:16PVENDER:AKMVA:6VD:7

Spec:VA:4.5~5.5VVD:2.7~3.6V

Measured volt.:VA:5.21VVD:3.28V

22

IC605

preampli er IC

S4308TYPE: 6PVENDER: AUKVCC: 6

Spec: VCC: +5 ~ +14V

Measured volt.: VCC: 11.45V

23

IC701IC702IC703

AMP

TAS5631BTYPE: 64PVENDER:Texas InstrumentPVDD_x:30,31,38,39,42,43,50,51GVDD_x:25,26,55,56VDD:64

Spec:PVDD_x: +25 ~+52.5V

GVDD_x: +10.8 ~+13.2VVDD: +10.8 ~+13.2V

Measured volt.:PVDD_x: 49.8VGVDD_x: 12.1VVDD: 12.1V

24IC801

BEAT BOX IC

FS-503BTYPE: 252PVENDER: FINEARCHVIN: W17,W18,N18,U18,N19,C19,B15,D9,D12,E3,G17,K3,N17,R3,R9,T12,C9,B3,A8,B9A15,B18,A18,W2,V18,A5,E1,E2,F2,L1,V2,T1,W10,W13,V17,

Spec: VIN:

VDDE: 1.1~1.3V VDDK: 3.0~3.6V

Measured volt.: VIN:

VDDE: 1.21V VDDK: 3.32V

25IC802

LDO

TJ4220GPDTYPE:8PVENDER:HTCVIN: 3 Vout: 6

Spec: VIN: 2.5~6VVout: 1.17~1.23V


27IC805

MEMORY

MX25L3206EM2I-12GTYPE:8PVENDER: MXVCC: 8

Spec: VCC: 2.7~3.6V

Measured volt.: VIN: 3.27V

28IC3U01

LDO


Spec: VIN: 2.25V~16V Vout: 2.22~16.16V

Measured volt.: VIN: 5.65V Vout: 5.09

29

IC3V01IC3V02

LED DRIVER

BU2090FTYPE:16PVENDER:ROHMVDD: 16

Spec: VDD: 4.3~13V


30ICW51

LED DRIVER

BU2090FTYPE:16PVENDER:ROHMVDD: 16

Spec: VDD: 4.3~13V


2. CAPACITORSMEMO

No. LocationValue

Capacitor(uF)

VoltageSpec

Measuredvoltage

01 C122 100uF 16V 3.31

02 C151 47uF 16V 3.43

03 C124 1000uF 16V 3.41

04 C601 100uF 16V 3.32

No. LocationValue

Capacitor(uF)

VoltageSpec

Measuredvoltage

44 C244 100uF 16V 5.61

45 C231 47uF 16V 5.08

46 C236 10uF 16V 5.19

01 C243 47uF 16V 12.1


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3-85 3-86

05 C682 220uF 6.3V 3.32

06 C620 220uF 6.3V 1.23

07 C655 10uF 16V 2.4

08 C660 47uF 16V 3.31

09 C676 4.7uF 50V 2.0910 C679 100uF 16V 11.5

11 C681 1uF 16V 0

12 C713 470uF 100V 49

13 C734 470uF 100V 49

14 C706 10uF 16V 12.3

15 C700 10uF 16V 3.28

16 C753 470uF 100V 49

17 C774 470uF 100V 49

18 C746 10uF 16V 12.2

19 C780 10uF 16V 3.24

20 C793 470uF 100V 49

21 C784 470uF 100V 49

22 C786 10uF 16V 12.1

23 C760 100uF 16V 11.3

24 C876 10uF 16V 3.32

25 C531 47uF 16V 4.89

26 C550 47uF 16V 1.21

27 C525 47uF 16V 3.28

28 C527 47uF 16V 1.21

29 C533 47uF 16V 3.32

30 C570 10uF 16V 3.28

31 C413 100uF 16V 5.09

32 C457 47uF 16V 3.28

33 C458 47uF 16V 3.27

34 C462 47uF 16V 3.32

35 C431 47uF 16V 1.65

36 C467 3.3uF 50V 1.74

37 C492 47uF 16V 3.32

38 C4H6 100uF 6.3V 1.83

39 C485 220uF 16V 5.08

40 C210 10uF 16V 2.47

41 C211 47uF 16V 4.98

42 C213 47uF 16V 4.97

43 C221 100nF 16V 3.28

02 C303 47uF 50V 7.2

03 C322 47uF 50V 3.24

04 C319 47uF 50V 31.9

05 C313 220uF 6.3V 3.47

01 C3V20 47uF 16V 3.57

02 C3V24 47uF 16V 3.52

01 CW54 47uF 16V 3.28

No. LocationValue

Capacitor (uF)

VoltageSpec.

100V-10%

240V/50Hz+10%

Measuredvoltage

Measuredvoltage

01 C903 1000uF 315V 122.3V 190V

02 C904 1000uF 315V 123.9V 180.7V

03 C905 33uF 500V 245.9V 370.1V

04 C908 47uF 50V 15.34V 15.33V

05 C912 47uF 50V 18.47V 18.59V

06 C914 47uF 50V 12.68V 13.8V

07 C931 330uF 16V 4.81V 4.8V08 C932 100uF 50V 31.96V 31.98V

09 C933 1000uF 16V 5.75V 5.75V

10 C935 1000uF 25V 12.63V 12.62V

11 C942 100uF 16V 11.99V 11.98V

12 C953 2200uF 80V 47.9V 48.1V

PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (TOP VIEW)


99/107

3-87 3-88

SMPS P.C.BOARD (BOTTOM VIEW)

NOTE) WarningParts that are critical with respect to riskof fire or electrical shock.


100/107

3-89 3-90

2. MAIN P.C.BOARD (TOP VIEW)


101/107

3-91 3-92

MAIN P.C.BOARD (BOTTOM VIEW)


102/107

3-93 3-94

3. FRONT_VFD P.C.BOARD (TOP VIEW)


103/107

3-95 3-96

(BOTTOM VIEW)

4. FRONT_USB P.C.BOARD (TOP VIEW) (BOTTOM VIEW)


104/107

3-97 3-98

5. FRONT_MIC P.C.BOARD (TOP VIEW) (BOTTOM VIEW)

6. FRONT_VOLUME P.C.BOARD (TOP VIEW)


105/107

3-99 3-100

FRONT_VOLUME P.C.BOARD (BOTTOM VIEW)


106/107

3-101 3-102

MEMOMEMO


107/107

3-103 3-104

Manual de sevicio LG CM8420

Documents

Transcript of Manual de sevicio LG CM8420