LG CM4530.pdf

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Mini Hi-Fi SystemSERVICE MANUAL

MODEL: CM4530 (CM4530, CMS4530F, CMS4530W)CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS

IN THIS MANUAL.

MODEL:CM4530(CM4530,CMS4530F,CMS4530W)

SERVICEMANUAL

3102,FEBRUARY76033048NFA:ON/P

Website http://biz.lgservice.com

Internal Use Only

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CONTENTS

SECTION 1 ........GENERAL

SECTION 2 ........CABINET & MAIN CHASSIS

SECTION 3 ........ELECTRICAL

SECTION 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 & UPDATE GUIDE ................................................................................... 1-81. AUDIO PROGRAM ................................................................................................................................... 1-8

2. CD PROGRAM ......................................................................................................................................... 1-9

3. EQ PROGRAM ....................................................................................................................................... 1-10

SPECIFICATIONS ..................................................................................................................................... 1-11

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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 andimpact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or

damage to the printed-circuit board.3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason

the 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 dont allow

contact 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 be

taken, 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 is

because 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)

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)

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 integrated

circuits 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 off

any 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 reasons

prior 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 ESDdevices.

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 theprotective 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 : STOPRCU Key : STOP

2. Check Version and Option codeFront Key : STOPRCU Key : PLAY/PAUSEYou can change [Audio MCU Version CD Controller Version EEPROM Option] by SKIP+/-.

3. Clear EEPROMFront Key : STOPRCU Key : SKIP-

4. Edit EEPROMFront Key : STOPRCU Key : SKIP+

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

5. Bluetooth DUTFront Key : STOPRCU Key : PROGRAMBluetooth model only

HIDDEN KEY MODE

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POWER ON

FLD no disc status or AUX status.

Remote control Fwd skip + Front STOP

push same timing during 5 seconds.

FLD OP-0.

Move to appropriate position andmake changes with remote control

skip, mode, play key.

Press ENTER key

NAME

OPT0

OPT1

OPT2

OPT3

OPT4OPT5

OPT6

OPT7

OPT8

OPT9

DETECT NEW EEPROM

(OPTION EDIT SCREEN)

HEX

05

00

00

02

00

69

81

05

20

00

SERVICE INFORMATION FOR EEPROM

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1. AUDIO PROGRAM

Download program file name must be CM4530_***.HEX

If security program (Water Wall) is activated on your PC, you must save the file to the USB storage

device and disable the security software, then download the file to your set.

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.

ON VFD DISPLAY SCREEN

NO USB

Insert USB device at USB function.

SEARCH

FIRMWARE

WRITE 00 .. 100

PROGRAM DOWNLOAD & UPDATE GUIDE

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2. CD PROGRAM

Download program file name must be HF000_CM4530_xxxxxxxx_xx.bin

Tip) With B/T : HF000_CM4530_xxxxxxxx_xx.bin

Without B/T : HF400_CM4530_xxxxxxxx_xx.bin



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 downloading



NO USB


SEARCH

FIRMWARE

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3. EQ PROGRAM

Download program file name must be EQ_PRG_CM4530_***.BIN



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



NO USB


READ

EQ DOWN

FINISH

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SPECIFICATIONS

GENERAL

Power requirements Refer to the main label.Power consumption Refer to the main label.Dimensions (W x H x D) 202 x 307 x 315 mmNet Weight (Approx.) 3.15 kg

Operating temperature 5 C to 35 C (41 F to 95 F)Operating humidity 5 % to 90 %

Bus Power Supply DC 5 V 500 mA

INPUTSAUX IN 2.0 Vrms (1 kHz, 0 dB), 75 , RCA jack (L, R) x 1

TUNERFM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHz

AM Tuning Range 522 to 1 620 kHz, 520 to 1 710 kHz or 522 to 1 710 kHz

AMPLIFIERStereo mode 160 W + 160 W (4 at 1 kHz, THD 10 %)

Surround mode Front 160 W + 160 W (4 at 1 kHz, THD 10 %)Subwoofer 180 W (3 at 1kHz, THD 10 %)

CD

Frequency Response 100 to 20 000 Hz

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MEMO

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SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS..................................................................................................................................... 2-31. CABINET AND MAIN FRAME SECTION (CM4530) ................................................................................ 2-3

2. MECHANISM DECK SECTION (DP-12AM) ............................................................................................. 2-5

3. PACKING ACCESSORY SECTION ......................................................................................................... 2-7

4. SPEAKER SECTION ................................................................................................................................ 2-8

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MEMO

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EXPLODED VIEWS1. CABINET AND MAIN FRAME SECTION (CM4530)

E

D D

A

G

B

E

H

A

B

G

F

FRONT

MAIN

F

260L

260R

464

464

464

464

464

464

A47

276

262

279

464

464

464

A44

A46

274

273

460

265

261

A43

464

464

259251

A42CABLE2

464

464

451

SMPS

300

H

NOTES) THE EXCLAMATION POINT WITHIN AEQUILATERAL TRIANGLE IS INTEND

TO ALERT THE SERVICE PERSONNE

TO THE PRESENCE OF IMPORTANT

SAFETY INFORMATION IN SERVICE

LITERATURE.

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2. MECHANISM DECK SECTION (DP-12AM)

A02

439

018

013

017

014

020

016

440

015

015B

015A

435

A01

026

001

002

012

012

037

012A

019442

442

A03

003

010

MEMO

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824 AM Loop Antenna

900 Remote Control

808 Battery

825 FM Wire Antenna

801 Instruction Ass'y

3. PACKING ACCESSORY SECTION

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A60

4. SPEAKER SECTION4-1. FRONT SPEAKER (CMS4530F)

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A90

4-2. SUBWOOFER SPEAKER (CMS4530W)

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MEMO

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SECTION 3

ELECTRICAL

CONTENTS

ONE POINT REPAIR GUIDE ................................................................................................................... 3-2

1. NO POWER ............................................................................................................................................ 3-22. NO BOOTING WHEN POWER ON THE SET ....................................................................................... 3-43. VFD IS NOT DISPLAYED WHEN POWER ON THE SET..................................................................... 3-54. NO OPERATION OF MD ....................................................................................................................... 3-65. NO SOUND .......................................................................................................................................... 3-11

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE .................................................................. 3-161. POWER (SMPS) ................................................................................................................................... 3-162. -COM PART CHECK .......................................................................................................................... 3-203. IC102(N24C16) CHECK ....................................................................................................................... 3-204. FLD DISPLAY CHECK ......................................................................................................................... 3-21

5. PWM MODULATION CHECK .............................................................................................................. 3-226. POWER AMP PART CHECK ............................................................................................................... 3-247. TUNER / AUX FUNCTION CHECK ...................................................................................................... 3-258. TUNER FUNCTION CHECK ................................................................................................................ 3-26

CDP ELECTRICAL TROUBLESHOOTING GUIDE ....................................................................... 3-271. CD FUNCTION ..................................................................................................................................... 3-272. DOUBLE USB FUNCTION ................................................................................................................... 3-28

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ONE POINT REPAIR GUIDE

1. NO POWER

If the unit doesnt 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 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 is normal or open.

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NO POWER

If the unit doesnt work by no power problem, repair the set according to the followingguide.

1-2. D9291-2-1. SolutionPlease check and replace D929 on SMPS board.


1) Check the Anode-Cathod Voltage of D929 with a digital multi-meter, it is normally 0.2 ~ 0.3 V.If it doesnt have any voltage, its destroyed. 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 SET

The set doesnt work when press the power button on the front board or the remotecontrol.

2-1. FLASH MEMORY2-1-1. SolutionPlease check and replace IC102 on MAIN board.


1) Check 3.7 V to CN101 and CN105 in standby mode.If there is no 3.7 V, check the SMPS.2) Check 5.6 V, 12 V, F+, F- and PVDD when power on the set.

- If the set doesnt 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 IC101 with a new one on

the MAIN board.


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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. VFD3-1-1. SolutionPlease check and replace DIG502 on FRONT board.

3-1-2. How to troubleshoot (Countermeasure)1) Check if VKK, FL+ and FL- are output from SMPS to VFD via the MAIN board.2) Check if IC102 outputs VFD_D0, VFD_CLK and VFD_STB to the FRONT board.3) Check the GR signal(pulse signal) of IC501 on the FRONT board.

Check the SG signal(pulse signal) of IC501 on the FRONT board.If the GR and SG signal isnt output, replace IC501 with a new one.

If the GR and SG signal is output, replace DIG502 with a new one.


GR SIGNAL

ABOUT 30V

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4. NO OPERATION OF MD

When no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the servo motors in MD dont work. This step is for checking theSPINDLE MOTOR among them.

4-1. SPINDLE MOTOR4-1-1. SolutionPlease check and replace IC301, IC302 on MAIN board.

4-1-2. How to troubleshoot (Countermeasure)1) Check the SPDO signal from pin16 of IC302.If no signal, check 3.3 V(RF) and X301.

2) Check the SPIN- & SPIN+ from IC301 to CN303 for driving SPINDLE motor. It is about 3.6 Vp-p.If no signal, check +1.8 V and +5 V for IC301.3) Check if the FFC cable is solidly connected between CN303 and MD.

4) Check the MD.If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.

Please check the function after changing another MD.


Sp-

Pin18 to CN303

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NO OPERATION OF MD

When no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the servo motors in MD dont work. This step is for checking theSLED MOTOR among them.

4-2. SLED MOTOR4-2-1. SolutionPlease check and replace IC301, IC302 on MAIN board.

4-2-2. How to troubleshoot (Countermeasure)1) Check the SLDO signal from Pin15 of IC302.If no signal, check 3.3 V(RF) and X301.

2) Check the SLED+ & SLED- from IC301 to CN303 for driving SPINDLE motor. It is about 2.9 Vp-p.If no signal, check +1.8 V and +5 V for IC301.3) Check if the FFC cable is solidly connected between CN303 and MD.

4) Check the MD.If the sled motor is sort-circuit or has any trouble, it can not move the pickup module.



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NO OPERATION OF MD

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

4-3. TRAY OPEN / CLOSE MOTOR4-3-1. SolutionPlease check and replace IC301, IC302 on MAIN board.

4-3-2. How to troubleshoot (Countermeasure)1) Check MOT_OPEN & MOT_CLOSE signals from Pin104, 105 of IC801 to IC301.If no signal, check +1.8 V & + 5 V to IC301.

2) Check LOAD from IC301 to CN303 for driving the tray open / close motor. It is about 3.85 Vp-p.If no signal, check +5 V to IC301. If it has any trouble, replace it with a new one.3) Check if the FFC cable is solidly connected between CN303 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.



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NO OPERATION OF MD

When no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the pickup module in MD doesnt work. This step is for checking theLASER TRACKING ACTUATOR.

4-4. LASER TRACKING ACTUATOR4-4-1. SolutionPlease check and replace IC301, IC302 on MAIN board.

4-4-2. 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 IC302.

If no signal, check 3.3 V(RF) and X301.2) Check TR- & TR+ from IC301 to CN301 for driving the tracking actuator.If no signal, check +1.8 V and +5 V for IC301.

3) Check if the FFC cable is solidly connected between CN301 and MD.4) Check the MD.

If the pickup module has any trouble, it can not move the laser beam on the left or right side.



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NO OPERATION OF MD

When no sound output in the CD function, you can not listen to music reading datafrom a CD disc if the pickup module in MD doesnt work. This step is for checking theLASER FOCUSING ACTUATOR.

4-5. LASER FOCUSING ACTUATOR4-5-1. SolutionPlease check and replace IC301, IC302 on MAIN board.

4-5-2. 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 IC302.

If no signal, check 3.3 V(RF) and X301.2) Check F- & F+ from IC301 to CN301 for driving the focusing actuator.If no signal, check +1.8 V and +5 V for IC301.

3) Check if the FFC cable is solidly connected between CN301 and MD.4) Check the MD.

If the pickup module has any trouble, it can not move the laser beam on the top or bottom side.



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5. NO SOUND

There is no sound output in the CD FUNCTION, repair the set according to the follow-ing guide.

5-1. IN THE CD FUNCTION5-1-1. SolutionPlease check and replace IC601, IC801 on MAIN board.


1) Check CD_BCLK, CD_LRCK, & CD_DOUTA signals from IC302 to IC801.If no signal, check if the RF & servo signals from MD is entered to IC302. Refer to the No operation of MD guide on Item 4.

2) Check the following I2S signal flow. < I2S audio signal Interface > - DAC_BCK : IC801_Pin85 --> IC601_Pin23

- DAC_LRCK : IC801_Pin86 --> IC601_Pin22 (44.1 kHz) - DAC_DATA : IC801_Pin81 --> IC601_Pin24

- DAC_MCLK : IC801_Pin84 --> IC401_Pin44If 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 on Item 5-2 is normal.


P/UP BX8805

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NO SOUND

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

5-2. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS)5-2-1. SolutionPlease check and replace IC701, IC702 on MAIN board.


1) Check FL, FR & SW signals from IC601 to IC701 & 702 each input function.If no signal, check if I2S audio signals are entered to IC601. Refer to I2S audio signal interface on Item 5-1.

2) Check PVDD.If PVDD is abnormal, check the SMPS.

3) Check +12 V 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 L707, L708, L709 and L712 one by one. When removed a inductance, 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 IC701/IC702_OUT-A/OUT-B & GND. a. If the impedance is 0 , the IC must be damaged.

b. After removing the heat sink, replace it with a new one.


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NO SOUND

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

5-3. IN THE USB FUNCTION5-3-1. SolutionPlease check and replace IC801 on MAIN board & IC502 on USB board.

5-3-2. How to troubleshoot (Countermeasure)1) Check +5VU to USB board.If the USB LED are turned on, the voltage is okay, if so not, check +5.6 V to pin6 of CN502.2) Check USB D from MAIN board to USB board.

a. Check USB_DM/DP signals to IC801(pin117, 118). b. Check USB signals 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 tothe IC is distorted or no signal, replace it with a new one.

3) Check if Digital audio AMP block on item 5-2 is normal.


USB HUBUSB2512 USB1

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NO SOUND

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

5-4. IN THE AUX FUNCTION5-4-1. SolutionPlease check and replace IC401 on MAIN board.

5-4-2. How to troubleshoot (Countermeasure)1) Check AUX_L/R signals to IC401 (Pin7, 8).2) Check if DAC_BCK, DAC_LRCK, & DAC_MCLK are entered from IC801 to IC401.3) Check if ADC_DATA is entered from IC401 to IC801.

If no signal, check +5 V & +3.3 V(ADC) for IC401. If is NG, replace it a new one.4) Check the following I2S signal flow from IC801 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 5-2.If AMP is damaged, replace it with a new one.


AUX

AUX_L/R

74HCT244

IC401CS5346

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NO SOUND

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

5-5. IN THE TUNER FUNCTION5-5-1. SolutionPlease check and replace IC401, TU100 on MAIN board.

5-5-2. How to troubleshoot (Countermeasure)1) Check if TUNER_LR is entered from Pin1,3 of TU100 to IC401(Pin23, 24).If no signals, Check +3.3 V for Tuner power.Check if the Tuner control signals (CLK, DAT, CE, RST, SLT) are entered from IC102 to TU100.

If it doesnt work, replace TUNER with a new one.2) Check if DAC_BCK, DAC_LRCK, & DAC_MCLK are entered from IC501 to IC401.

3) Check if ADC_DATA is entered from IC401 to IC801.If no signal, check +5 V & +3.3 V(ADC) for IC401. If is NG, replace it with a new one.

4) Check the following I2S audio signal flow from IC801 to IC601. (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 5-2.If AMP is damaged, replace it with a new one.


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1. POWER (SMPS)

No 3.7 VA

YES

F901 normal? Replace F901 (Use the same fuse).

YES

NO

BD901 normal? Replace BD901.

YES

NO

TH901 normal? Replace TH901.

YES

NO

Is Vcc(10 V ~ 18 V) supplied to

IC901 Pin7?D904 normal?

YES

NO

Check or replace D904.

NO

NO

AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE

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No PVDD

YES

F901 normal? Replace F901 (Use the same fuse).

YES

NO

BD901 normal? Replace BD901.

YES

NO

TH901(TH902) normal? Replace TH901.

YES

NO

Is Vcc(10 V ~ 18 V) supplied to

IC902 Pin7?D905 normal?

YES

NO

Check or replace D905.

Q910 b "H"?

NO

NO


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No 12 V

Is Vcc(15 V) supplied to Q953

collector?Check or replace D921.

YES

YES

NO

Is the13 V Supplied to Q953

base?

Check P-CTRL H signal

from -COM.

YES

NO

Check or replace Q953.


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No VFD

D925 normal? Check or replace D925.

YES

YES

NO

ZD951 normal?

Q951 normal?

Check or replace ZD951.

Check or replace Q951.

YES

YES

NO

NO

Check or replace VFD.


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2. -COM PART CHECK

-COM PARTCHECK

Refer toSMPS troubleshooting.

NOCheck ifvoltage of CN105 Pin10

is 3.7 VA.

Check if output of D103 is 3.7 V.

NOCheck

both end voltage ofD102, D103.

Check if IC101_Pin49 andIC101_Pin36,59 are 3.7 V.

YES

Check D102, D103. Replace D102, D103.NONO

X101: 32.768 kHzX102: 9 8304 MHz

YES

YES

YES

YES


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4. FLD DISPLAY CHECK

FLD DISPLAY CHECK

YES

CheckCN105 Pin1,2,3 input

voltage.

YES

Check if both end voltageof FL+, FL- are over 2.9 V

VKK : over 25.6 V.

NORefer to SMPS troubleshooting.

YES

Check CN501connection and power

Pin1, 2, 3(FL+, FL-, VKK),

Pin10(3.7 VA).

YES

OK

NOCheck CN501 connection.

YES

Check eachPin voltage.

YES


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5. PWM MODULATION CHECK

PWM MODULATION PART CHECK

CheckCN105 Pin11 3.7 VA.

Check IC601(TAS5548)

VDD 3.3 V

Check VDD Core 1.2 V.

NO Refer toSMPS troubleshooting.

Check

X602(19.2 MHz)

operation.

NOReplace X602(19.2 MHz).

Check X602

(19.2 MHz).

YES

NO

YES

YES

YES

YES


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Check

IC601(PS9854)input data

Pin4, 5, 6PWM wave.

NO Refer toCD troubleshooting.

Check

CD Assy communication

Pin4, 5, 6.

OK

NO

NO Check each lineresistor output.

Check

IC601(PS9854) input

data.

CheckPWM

YES

YES

YES

YES

A


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6. POWER AMP PART CHECK

POWER AMP PART CHECK

Refer to SMPS troubleshooting.NOCheck

CN105 Pin6: +12 VPin14,15: 26 V.

YES

YES

Check IC701, IC702

Pin29, 30, 31, 36, 37, 38 input voltage.

YES

Check each line resistor output voltage.NOCheck IC701, IC702

Pin2: +12 V input.

Check PWM Modulator inputIC701 Pin5, 6, 14, 15 / IC702 Pin5, 6.

YES


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7. TUNER / AUX FUNCTION CHECK

FUNCTION CHECK

Check JK401,TU100.NO

YES

Check IC401(CS5346) Pin7, 8,

23, 24 input.

YES

YES

Check IC401

(CS5346) Pin9 outputdata.

YES

Check IC401Pin5: +5 V

Pin46: +3.3 V.

Check CN105 Pin7: +5 VPin9, 10: +3.3 V.

NONO

CheckIC801(BX8805)

input data.

Check IC401

Pin5: +5 V,Pin6: High,

Pin46: 3.3 V.

Check IC401Pin41: SDOUT,Pin42: SLCK,Pin43: LRCK,Pin44: MCLK

NONO


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8. TUNER FUNCTION CHECK

TUNER FUNCTION CHECK

Check tuner module voltage(Pin4: +3.3 V).

NOCheck tunermodule(TU100)

operation.

YES

YES

Check IC102 Pin21, 22, 23, 24, 25

data in/output. Check tuner module data.NO

YES

Refer to function check.


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CD FUNCTION

YES

Can thedisc insert?

NO Is Motor_open/close

OK? (IC301 Pin10,11)

NO

YES

Disc readingis ok?

Is no signal at spk?

YES

Is Motor ok?(about 12 )

Is load +,- ok?

YES

Check loading motor.

NO

IM driving (Focus andtracking) is ok?

NO

Focus/

tracking/sled signal

is ok?NO Check IC301

(Motor drive IC).

NO

Is the PD(CN301

Pin22) about 190 mV?

YES

Check IC301.

YES

1. CD FUNCTION

Check IM

(pick-up).

NO

CDP ELECTRICAL TROUBLESHOOTIHG GUIDE

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USB FUNCTION

Check USB_5V.Display NO USB.

YES

YES

Check USB_D+/D-(R501,R502).

YES

Plug-in usb device.

Check CN502.NONO

YES

Display READ.

YES

Display NO FILE

YES

Check usb jack (JK501/ JK502).

NO

Replace IC801NO

Check IC801(Pin116 117)

2. DOUBLE USB FUNCTION

CDP ELECTRICAL TROUBLESHOOTIHG GUIDE

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1. SDRAM

1

2

3

4

CLK

DATA

ADDRESS

CS

WAVEFORMS OF MAJOR CHECK POINT

IC802 Pin38

IC802 Pin53

IC802 Pin35

IC803 Pin1

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FE

TE

FOD

RF

6

7

8

9

IC302 Pin61

IC302 Pin62

IC302 Pin63

IC302 Pin13

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13

14

16

15

DAC_MCLK

DAC_BCK

DAC_LRCK

DAC_DATA

IC801 Pin84

IC801 Pin85

IC801 Pin86

IC801 Pin81

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MEMO

WIRING DIAGRAM

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3-33 3-34

23P9P

SPK TERMINAL TUNER

MODULE

1 CD MD

MAIN PCB

16P

FRONT PCB

SMPS PCB

15P

AUX

JACK

Po

wer

cord

8P

: Harness

: FFC

BT8P

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2. SMPS BLOCK DIAGRAM

SMPS

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3-37 3-38

PVDD

Noise

FilterBlock

(X-capLine Filter)

SnubberBlock

Main

SMPS ICBlock

TR

A

N

S

Snubber

Block

Photo coupler

Photo coupler

Photo coupler

FL+

FL-

Vkk

On/Off

5V5V LDO

12V12V

RegulationBlock

3.7VA

P.CTL

On/Off

On/Off

AMP

SMPS ICWith FET

Block

F

U

S

E

Y-Cap

Y-Cap

T

RA

N

S

SMPS

5.6VACN901

Feedback

Feedback

3. AUDIO PATH BLOCK DIAGRAM

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3-39 3-40

12MHZ

AMP Block

MAIN

Block

PWMTAS5548

TAS5612LAFR,FL

Woofer

Tuner

Aux in

ADCCS5346

(SLAVE)

A_AUX

BX8805

(128 PIN)

DAC_

DATA

DAC_LRCK

DAC_BCKA_TUNER DAC_MCLK

12.288MHZ

DAC_LRCK

DAC_BCK

74AHC244

TAS5612LA

150Wx2

200Wx1

BU9543KV

CD_BCK

CD_LRCK

CD_DATA

ADC_DATA

BCK

LRCK

DATA

244_CTRL1/CTRL2

(From MICOM)

4. MAIN POWER DIAGRAM

RESET

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3-41 3-42

MICOMVDD

P_CTRL

PWR_SENSE

RESET

EEPROM3.3V

BU9543KV

S3053

SDRAM

FLASH

CS53465VA

VCC15VCC33

VCC33

VCC33

VCC33

VCC33

+3.7VA

TUNER

VCC33PICKUP

BX8805

VCC33

VCC12LM1117-1.2V

TJ3965D

KIA7027AF

TAS5548VCC33

VCC18

5V

VCC33

5V

VCC3374HCT244 ADD

BT moduleVCC33

5. FRONT/ AMP POWER DIAGRAM

FROM_MAIN to Front

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3-43 3-44

RCU

VFD

TAS5612LA

USB1USB_5VLM37102-ADJ5.6VA

_

+3.7VA

VKK/FL-+

12V

FROM_SMPS to AMP

PVDD

MC3401

FAN

12V LED

USB_5V USB2

CIRCUIT DIAGRAMS1. 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 voltmeterduring Play mode.

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3-45 3-46

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

CAUTION:Danger if fuse is i ncorrectly 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.

SMPEAX64991501_0.1.0_SMPS_

2013. 01.

2. MAIN - DSP CIRCUIT DIAGRAM

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3-47 3-48

1

3

11 12

10

5

15

13

16

14

24

17

18

: WAVEFORM NUMBER

A

1

2

3

4

5

6

7

8

9

10

11

12


DSPEAX64991601_0.1.0_MAIN_SD_1

2013.01.08

3. MAIN - MICOM/ ADC CIRCUIT DIAGRAM

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3-49 3-50

A

1

2

3

4

5

6

7

8

9

10

11

12


MICOM & AEAX64991601_0.1.0_MAIN_S

2013.01

4. MAIN - AMP CIRCUIT DIAGRAM

12

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3-51 3-52

A

1

2

3

4

5

6

7

8

9

10

11

12


AMPEAX64991601_0.1.0_MAIN_SD_3

2013.01.08

5. MAIN - RF SERVO CIRCUIT DIAGRAM

12

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3-53 3-54

8

9 7 6

: WAVEFORM NUMBER

A

1

2

3

4

5

6

7

8

9

10

11

12


RF SERVEAX64991601_0.1.0_MAIN_SD

2013.01

6. FRONT CIRCUIT DIAGRAM

12

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3-55 3-56

A

1

2

3

4

5

6

7

8

9

10

11


FRONTEAX64991401_0.1.0_FRONT_SD

2013.01.08

CIRCUIT VOLTAGE CHART

SMPS Input LDO TYPE Used-current(mA) Total-current Real Input(V) LDO Used-power(W) Total-power(W) Item

3.7VA / / 10.5 10.5 3.7 / / STBY-LED

VA Di d MBR MC

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3-57 3-58

3.7VA

3.7VA Diode MBR0540 49

3.3 0.0020

MC3401

3.7VA Diode MBR0540 5 3.3 0.002 MICOM & EEPROM

3.7VA

LDO TJ3965D-ADJ

16

178.5

3.3 0.006

0.071

SDRAM

3.7VA 8.2 3.3 0.003 Flash

3.7VA 13 3.3 0.005 BU9543KV

3.7VA 22 3.3 0.009 TUNER

3.7VA 92 3.3 0.037 TAS5548

3.7VA 1 3.3 / 74HCT244

3.7VA 3.5 3.3 0.001 Pick Up

3.7VA 7.8 3.3 0.003 CS5346

3.7VA 15 3.3 0.006BX8805

3.3V3.3V LDO LM1117_1.2V 52 52 1.2 0.109 0.109

3.3V Diode& Triode 6 6 1.5 0.011 0.011 BU9543KV

5VA

5V / / 36 36 5 V / CS5346

5V / / Normal : 110

5 / / S3053Peak 400

5.6VA 5.6V LDO 0IPMGKE018A 72/80 50.043 0.043

USB/0.048 /0.048

Vkk 26V / / 2 2 26 / / MC3401

F+ 20.2V / / 140 140 20.2 / / VFD

12V

12V / / 88

288

12 / / 8 Blue LED

12V / / 90 12 / / FAN

12V / / 110 12 / / TAS5612LA

PVDD26/29.1V / /

3000Peak 3A 26/29.1 / / TAS5612LA

(2 CH)

26/29.1V / / 6000 Peak 6A 26/29.1 / / TAS5612LA

Output Voltage Current (mA) Remark

SMPS

3.7VReading 262

Max 280

5VReading 410

Operation (Normal) 180

12VVOL < 20 180 Fan : not Work.

VOL > 20 250 Fan : Work.

PVDD 2 CH 3000 Max

PRINTED CIRCUIT BOARD DIAGRAMS

1. SMPS P.C.BOARD (TOP VIEW)

(BOTTOM VIEW)

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

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3-59 3-60

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

(BOTTOM VIEW)

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3. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW)

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LG CM4530.pdf

Documents

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