LG OM5540 Schematic

Mini Hi-Fi System

SERVICE MANUAL

MODEL:

OM5540

CAUTION

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

MODEL: OM5540SERVICE MANUAL

Internal Use Only

Website http://biz.lgservice.com

4102 ,LIRPAP/NO : AFN76592163

CONTENTS

SECTION 1 ........ GENERAL

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

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ REPLACEMENT PARTS LIST

1-1

SECTION 1

SUMMARY

CONTENTS

ESD PRECAUTIONS .................................................................................................................................. 1-3

HIDDEN KEY MODE................................................................................................................................... 1-4

SERVICE INFORMATION FOR EEPROM .......................................................................................... 1-5

PROGRAM DOWNLOAD & UPDATE GUIDE ................................................................................... 1-6

1. MICOM PROGRAM .................................................................................................................................. 1-6

2. MCS PROGRAM ....................................................................................................................................... 1-7

3. EQ PROGRAM ......................................................................................................................................... 1-8

SPECIFICATIONS ....................................................................................................................................... 1-9

1-2

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)

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

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 a
commercially 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 surface
such 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 by
conductive 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 OTHER

SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate
static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.

1-3

HIDDEN KEY MODE

Push both Front key and RCU key to activate it for 5 seconds.

1. Disc Lock On/Off (CD Function Only Active)

 Front Key : STOP
 RCU Key : STOP

2. Check Version and Option code

 Front Key : STOP
 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

6. Power Disc Lock On/Off (CD Function Only Active)

 Front Key : STOP
 RCU Key : EQ

7. Amp Clip On/Off

 Front Key : STOP
 RCU Key : Mute

Amp Clip Mode Change (Amp Clip On --> Amp Clip Off --> Level Down display).

1-4

SERVICE INFORMATION FOR EEPROM

POWER ON

FLD “BT READY” status

It is possible at any function.
(ex. It is possible at FLD “NO USB” status, too.)
This is an example.

Front “STOP” + Remote control “ ”

push same timing during 5s

FLD “op0-…..”

Move to appropriate position

And make changes

with Rmc “ REPEAT” key.

Press STOP Key

FLD “WRITE OK”

DETECT NEW EEPROM
(OPTION EDIT SCREEN)

NAME

OPT0
OPT1
OPT2
OPT3
OPT4
OPT5
OPT6
OPT7
OPT8
OPT9

HEX

09
00
00
01
00
11
81
50
00
00

Front ‘STOP’ + Remote control “ ”

push same timing during 5s

FLD “E2P CLR”

Completed

1-5

PROGRAM DOWNLOAD & UPDATE GUIDE

1. MICOM PROGRAM

Download program file name must be MICOM_OM5540_YYMMDDX.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. Downloading file proceeds in the same way at
USB1 function and USB2 function.

Caution: When downloading the file, you should neither unplug the USB device, change to the other function,

nor power off the device.

ON VFD DISPLAY SCREEN

NO USB

↓← Insert USB device at USB function.

SEARCH

↓

MICOM UP

USB device must be unplugged when the downloading process is completed.

↓

FINISH

↓

Auto POWER OFF

1-6

2. MCS PROGRAM

Download program file name must be HG440_OM5540_YYMMDDX.bin

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. Downloading file proceeds in the same way at
USB1 function and USB2 function.

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

↓

FINISH

↓

Auto POWER OFF

1-7

3. EQ PROGRAM

Download program file name must be EQ_PRG.BIN

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. Downloading file proceeds in the same way at
USB1 function and USB2 function.

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

↓

EQ UP

↓

FINISH

↓

Auto POWER OFF

1-8

SPECIFICATIONS

• GENERAL

Power requirements Refer to the main label.
Power consumption Refer to the main label.
Dimensions (W x H x D) 395.5 mm x 548 mm x 446 mm
Net Weight (Approx.) 16.5 kg
Operating temperature 5 °C to 35 °C (41 °F to 95 °F)

% 09 ot % 5 ytidimuh gnitarepO

Bus Power Supply (USB) 5 V 500 mA

• INPUTS

006 ,zHk 1( smrV 1.2 NI XUA Ω, RCA jack, L/R)

)R/L ,kcaj ø 5.3( smrV 8.0 NI .TROP

Vm 52 NI .CIM

• TUNER

• AMPLIFIER

W 033 latoT

4 ,zHk 1 ta( W 033 onoM tnorF Ω)

% 02 DHT

zHM 00.801 ot 05.78 ro zHM 0.801 ot 5.78 egnaR gninuT MF

Design and specifications are subject to change without notice.

1-9

1-10

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS ..................................................................................................................................... 2-3

1. CABINET AND MAIN FRAME SECTION (OM5540) ................................................................................ 2-3

2. PACKING ACCESSORY SECTION ......................................................................................................... 2-5

2-1

2-2

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION (OM5540)

D

L

LED/RCU2

LED

A50

300

I

A

B

I

L

K

K

G

A

D

C

J

J

H

G

E

F

E

H

C

NFC Tag

Bluetooth Module

VFD

MIC

KEY/PTB

KEY/USB

MAIN

SMPS

B

250

250

260

261

264

255

270

262

263

265

A47

A46

251

253

291

513

513

A51

A51

464

464

464

464

464

512

514

512

512

512

512

514

512

464

512

512

A43

A48

A49

A44

A42

254

A53

252

CABLE3

CABLE1

CABLE2

464

464

464

464

464

464

464

464

464

464

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.

2. PACKING ACCESSORY SECTION

801 Instruction Ass'y

808 Battery

825 FM Wire Antenna

804 Bag

803 Packing

900 Remote Control

803 Packing

802 Box

SECTION 3 ELECTRICAL

CONTENTS

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

1. NO POWER ............................................................................................................................................ 3-2

2. NO BOOTING WHEN POWER ON THE SET ....................................................................................... 3-4

3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ..................................................................... 3-5

4. NO SOUND ............................................................................................................................................ 3-6

ELECTRICAL TROUBLESHOOTING GUIDE .................................................................................. 3-12

1. POWER (SMPS) ................................................................................................................................... 3-12

2. MCS PART CHECK.............................................................................................................................. 3-15

3. IC504(M24C16) CHECK ....................................................................................................................... 3-15

4. DOUBLE USB FUNCTION ................................................................................................................... 3-16

5. FLD DISPLAY CHECK ......................................................................................................................... 3-17

6. PWM MODULATION CHECK .............................................................................................................. 3-18

7. POWER AMP PART CHECK ............................................................................................................... 3-20

8. TUNER / AUX FUNCTION CHECK ...................................................................................................... 3-21

9. MIC FUNCTION CHECK ...................................................................................................................... 3-22

WAVEFORMS OF MAJOR CHECK POINT ..................................................................................... 3-23

1. SDRAM ................................................................................................................................................. 3-23

2. AUDIO PATH ........................................................................................................................................ 3-23

3. USB....................................................................................................................................................... 3-23

WIRING DIAGRAM ................................................................................................................................... 3-25

BLOCK DIAGRAMS ................................................................................................................................. 3-27

1. SYSTEM BLOCK DIAGRAM_1 ............................................................................................................ 3-27

2. SYSTEM BLOCK DIAGRAM_2 ............................................................................................................ 3-29

3. SMPS BLOCK DIAGRAM_1................................................................................................................. 3-31

4. SMPS BLOCK DIAGRAM_2................................................................................................................. 3-33

CIRCUIT DIAGRAMS ............................................................................................................................... 3-35

1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-35

2. MAIN_DSP CIRCUIT DIAGRAM .......................................................................................................... 3-37

3. MAIN_ADC/PWM CIRCUIT DIAGRAM ................................................................................................ 3-39

4. MAIN_AMP CIRCUIT DIAGRAM .......................................................................................................... 3-41

5. FRONT_KEY/USB CIRCUIT DIAGRAM .............................................................................................. 3-43

6. FRONT_VFD CIRCUIT DIAGRAM ....................................................................................................... 3-45

7. FRONT_KEY/PTB CIRCUIT DIAGRAM ............................................................................................... 3-47

8. FRONT_MIC CIRCUIT DIAGRAM ....................................................................................................... 3-49

9. SPK_LED CIRCUIT DIAGRAM ............................................................................................................ 3-51

10. X_LED/RCU2 CIRCUIT DIAGRAM ...................................................................................................... 3-53

CIRCUIT VOLTAGE CHART ................................................................................................................. 3-55

1. ICs......................................................................................................................................................... 3-55

2. CAPACITORS....................................................................................................................................... 3-56

3. CONNECTORS .................................................................................................................................... 3-57

PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-59

1. SMPS P.C.BOARD ............................................................................................................................... 3-59

2. MAIN P.C.BOARD ................................................................................................................................ 3-61

3. FRONT_KEY/USB P.C.BOARD ........................................................................................................... 3-63

4. FRONT_VFD P.C.BOARD ................................................................................................................... 3-63

5. FRONT_KEY/PTB P.C.BOARD ........................................................................................................... 3-65

6. FRONT_MIC P.C.BOARD .................................................................................................................... 3-65

7. SPK_LED P.C.BOARD ......................................................................................................................... 3-67

8. X_LED/RCU2 P.C.BOARD ................................................................................................................... 3-67

3-1

ONE POINT REPAIR GUIDE

1. NO POWER

If the unit doesn’t work by no power problem, repair the set according to the following
guide.

(1) FUSE & BRIDGE DIODE

[ Solution ]

Please check and replace F901, BD901, TH901 or TH903 on SMPS board.

[ 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 or TH903 is normal or open.

< SMPS circuit diagram >

[ Service hint (Any picture / Remark) ]

< F901 >

If F901 is not short-circuit,

replace it with a same

specifi cations one.

If BD901 is short-circuit,

replace it with a new one.

< BD901 >

3-2

< TH901 >

If TH901 is open,

replace it with a new one.

ONE POINT REPAIR GUIDE

(2) D951

[ Solution ]

Please check and replace D951 on SMPS board.

[ How to troubleshoot (Countermeasure) ]

1) Check the anode-cathod voltage of D951 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.

[ Service hint (Any picture / Remark) ]

< SMPS circuit diagram >

3-3

ONE POINT REPAIR GUIDE

2. NO BOOTING WHEN POWER ON THE SET

The set doesn’t work when press the power button on the front board or the remote
control.

(1) FLASH MEMORY

[ Solution ]

Please check and replace IC503 on MAIN board.

[ How to troubleshoot (Countermeasure) ]

1) Check 5.6 V to CN501 in standby mode.
 If there is no 5.6 V, check the SMPS.

2) Check 12 V, F+, F- and PVDD 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
X500 and X501 work normally but, if you can not power on the set, replace IC501 with a new one on
the MAIN board.

[ Service hint (Any picture / Remark) ]

PWR_CTRL(R53D)

.

< Main Board Top view >

KEY1(R542)

3-4

ONE POINT REPAIR GUIDE

3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET

When power on the set, any icons or characters on VFD are not displayed.

(1) VFD

[ Solution ]

Please check and replace DIG400 on FRONT board.

[ How to troubleshoot (Countermeasure) ]

1) Check if VKK, FL+ and FL- are output from SMPS to VFD via the MAIN board.

2) Check if IC501 outputs VFD_D0, VFD_CLK and VFD_STB to the FRONT board.

3) Check the GR signal(pulse signal) of IC301 on the FRONT board.
Check the SG signal(pulse signal) of IC301 on the FRONT board.

 If the GR and SG signal isn’t output, replace IC301 with a new one.
 If the GR and SG signal is output, replace DIG302 with a new one.

[ Service hint (Any picture / Remark) ]

GR signal

SG signal

Click the picture,

and then drag to enlarge it.

Check the waveform on details.

GR SIGNAL
ABOUT 30V

SG SIGNAL
ABOUT 30V

3-5

< Waveform of GR and SG signal >

ONE POINT REPAIR GUIDE

4. NO SOUND

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

(1) BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS)

[ Solution ]

Please check and replace IC700 on MAIN board.

[ How to troubleshoot (Countermeasure) ]

1) Check PWM_FL± signals from IC601 to IC700 each input function.
 If no signal, check if I2S audio signals are entered to IC601.

2) Check the following I2S signal flow. < I2S audio signal Interface >

- MCS_BCK: IC501_Pin E1 --> IC601_Pin23

- MCS_LRCK : IC501_Pin D1 --> IC601_Pin22 (44.1 kHz)

- MCS_DATA_OUT : IC501_Pin E2 --> IC601_Pin24

- MCS_MCLK : IC501_Pin D2 --> IC201_Pin44
 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 PVDD.
 If PVDD is abnormal, check the SMPS.

4) 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 L702, L706 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.

5) Check the impedance between IC700_OUT_A/OUT_D & 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.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

176PIN BGA

< Waveform of I2S audio

interface signals>

FL ±

12.288 MHz

PWM

TAS5548

< I2S signal fl ow >

TAS5631BPHD

< Main Board Top view >

MCS_MCLK (16.93MHz)

MCS_BCK(1.4MHz)

MCS_DATA_OUT

MCS_LRCK(44.1KHz)

L706

L702

3-6

ONE POINT REPAIR GUIDE

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

(2) IN THE USB FUNCTION

[ Solution ]

Please check and replace IC501 on MAIN board & IC460 on USB board.

[ How to troubleshoot (Countermeasure) ]

1) Check +5 V_USB to USB board.
 If the USB LED are turned on, the voltage is okay, if so not, check +5.6 V to pin3 of CN460.

2) Check USB D1± or USB D2± from MAIN board to USB board.
a. Check 2.0_D1± signals(pin U7, U8) or 1.1_D1± signals(pin A7, A8) to IC501on MAIN board.
b. Check USB± signals to CN421 (pin 2, 3, 5, 6).
 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” on item 4-(1) is normal.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

176PIN BGA

12.288 MHz

PWM

TAS5548

FL ±

USB1_D±

USB2_D±

TAS5631BPHD

D- to pin 3&6 of CN421

D+ to pin 2&5 of CN421

< Waveform of USB D± signal >

< USB function signal fl ow >

3-7

ONE POINT REPAIR GUIDE

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

(3) IN THE AUX FUNCTION

[ Solution ]

Please check and replace IC201 on MAIN board.

[ How to troubleshoot (Countermeasure) ]

1) Check AUX_L/R signals to IC201 (Pin23, 24).

2) Check if MCS_BCK, MCS_LRCK & MCS_MCLK are entered from IC501 to IC201.

3) Check if ADC_DATA is entered from IC201 to IC501.
 If no signal, check +5 V & +3.3 V(ADC) for IC201. If is NG, replace it a new one.

4) Check the following I2S signal flow from IC501 to IC601. (Refer to item 4-(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 4-(1).
 If AMP is damaged, replace it with a new one.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

176PIN BGA

IC201

PWM

CS5346

FL ±

TAS5631BPHD

AUX

AUX_L/R

12.288 MHz

TAS5548

< AUX function signal fl ow >

MCS_LRCK to R219

MCS_MCLK to R220

AUX_R to R227

< Main Board Top view >

MCS_ADC DATA to R215

MCS_BCK to R216

AUX_L to R226

3-8

ONE POINT REPAIR GUIDE

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

(4) IN THE TUNER FUNCTION

[ Solution ]

Please check and replace IC201, TU500 on MAIN board.

[ How to troubleshoot (Countermeasure) ]

1) Check if TUNER_LR is entered from Pin1, 3 of TU500 to IC201(Pin26, 27).

 If no signals, check +3.3 V for tuner power.
 Check if the tuner control signals (CLK, DAT, CE, RST, SLT) are entered from IC501 to TU500.

If it doesn’t work, replace TUNER with a new one.

2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.

3) Check if ADC_DATA is entered from IC201 to IC501.
 If no signal, check +5 V & +3.3 V(ADC) for IC201. If is NG, replace it with a new one.

4) Check the following I2S audio signal flow from IC501 to IC601. (Refer to item 4-(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 4-(1).
 If AMP is damaged, replace it with a new one.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

176PIN BGA

TUN ER

TUNER_L/R

A

12.288 MHz

TAS5548

< AUX function signal fl ow >

PWM

IC201

CS5346

FL ±

TAS5631BPHD

TUNER_L to C214

< Main Board Top view >

TUNER_R to C215

3-9

ONE POINT REPAIR GUIDE

There is no sound output in the PORTABLE FUNCTION, repair the set according to
the following guide.

(5) IN THE PORTABLE FUNCTION

[ Solution ]

Please check and replace IC201 on MAIN board.

[ How to troubleshoot (Countermeasure) ]

1) Check PT_L/R signals to IC201 (Pin9, 10).

2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.

3) Check if ADC_DATA is entered from IC201 to IC501.
 If no signal, check +5 V & +3.3 V(ADC) for IC201. If NG, replace it a new one.

4) Check the following I2S signal flow from IC501 to IC601. (Refer to item 4-(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 4-(1).
 If AMP is damaged, replace it with a new one.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

176PIN BGA

PTB_L/R

Porta ble

12.288 MHz

TAS5548

PWM

IC201

CS5346

FL ±

TAS5631BPHD

< PORTABLE function signal fl ow >

PTB_L to R229

PTB_R to R228

< Main Board Top view >

3-10

ONE POINT REPAIR GUIDE

There is no sound output in the MIC FUNCTION, repair the set according to the
following guide.

(6) IN THE MIC FUNCTION

[ Solution ]

Please check and replace IC203 on MAIN board and IC420 on front MIC board.

[ How to troubleshoot (Countermeasure) ]

1) Check MIC_SIG signal, from JACK421, JACK422 to IC420 (Pin3) on front MIC board.

2) Check MIC_SIG signal from IC420 (Pin4) to CN423.
 If no signal, check +5 V for IC420. If NG, replace it a new one.

3) Check MIC_SIG signal from CN423 (Pin4) to CN420.

4) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC203.

5) Check if ADC_DATA is entered from IC203 to IC501.
 If no signal, check +5 V & +3.3 V(ADC) for IC203. If NG, replace it a new one.

6) Check the following I2S signal flow from IC501 to IC601.(Refer to item 4-(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 4-(1).
 If AMP is damaged, replace it with a new one.

[ Service hint (Any picture / Remark) ]

DSP IC501

MLC3730

mic1

MIC SIG

mic2

IC420
S4308

12.288 MHz

PWM

TAS5548

MIC SIG

IC203

AK5358

FL ±

176PIN BGA

TAS5631BPHD

3.3V to L240

MCS_SIG to R218

5V to L241

MCS_ADC DATA to R243

< Main Board Top view >< MIC function signal fl ow >

MCS_LRCK to R241

MCS_MCLK to R240

MIC_SIG to R217

MCS_BCK to R242

3-11

ELECTRICAL TROUBLESHOOTIHG GUIDE

1. POWER (SMPS)

No 5.6 VA

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

BD901 normal? Replace BD901.

TH901(TH903) normal? Replace TH901.

YES

NO

YES

NO

YES

NO

YES

Is Vcc

(10 V ~ 18 V) supplied to

IC901 Pin7?

YES

NO

D902 normal?

NO

Check or replace D902.

NO

D933 / D934 normal? Replace D933 / D934.

YES

Is there

about 2.5 V at

NO

Replace IC941.

IC941 Pin1?

YES

NO

D935 normal? Replace D935.

YES

NO

D932 normal? Replace D932.

YES

D931 normal? Replace D931.

YES

Power line of main PCB is short.

NO

3-12

ELECTRICAL TROUBLESHOOTIHG GUIDE

No PVDD

YES

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

YES

BD901 normal? Replace BD901.

YES

TH901(TH903) normal? Replace TH901.

YES

NO

NO

NO

Is Vcc

(10 V ~ 18 V) supplied to

IC911 Pin4?

YES

NO

D903 normal?

YES

Q911 base "H"?

YES

•

Check P-CTRL "H" signal from MCS.

• Check PC902.

Check or replace Q911.

Q901 normal? Replace Q901.

YES

D951 normal? Replace D951.

NO

NO

NO

Check or replace D903.

NO

YES

Is there about 2.5 V

at IC951 Pin1?

YES

Power line of main PCB is short.

NO

Replace IC951.

3-13

ELECTRICAL TROUBLESHOOTIHG GUIDE

No 12 V

YES

Is Vcc (15 V)

supplied to IC931?

YES

IC931 Pin4 “H”?

YES

Check or replace IC931.

No VFD

YES

D931 normal?

NO

NO

NO

Check or replace D935.

Check the ‘P.CTL “H”’ signal from μ-com

Check or replace D931.

YES

ZD931 normal?

YES

Q501 / Q502 normal?

YES

Check or replace VFD.

NO

NO

3-14

Check or replace ZD931.

Check or replace Q501 / Q502.

ELECTRICAL TROUBLESHOOTIHG GUIDE

2. MCS PART CHECK

MCS PART CHECK

YES

Check if

voltage of CN501 Pin7, 8

is 5.6 VA.

YES

Check if IC510

have 3.3 V output.

YES

Check if IC508

have 1.2 V output.

YES

X500: 32.768 kHz,

X501: 24 MHz,

Check the operation.

NO

NO

NO

Refer to

SMPS troubleshooting.

Check and change IC510.

Check and change IC508.

YES

OK

3. IC504(M24C16) CHECK

CHECK IC501 PIN.

YES

Check pinC2, pinB1

DATA : CLK

YES

OK OK

NO

Check MCS

voltage 3.3 VA.

YES

Check MCS.

YES

3-15

NO

Refer to MCS troubleshooting.

NO

Replace MCS.

ELECTRICAL TROUBLESHOOTIHG GUIDE

4. DOUBLE USB FUNCTION

USB FUNCTION

YES

Plug-in usb device.

YES

Display “NO USB”.

YES

Display “READ”.

YES

Display “NO FILE”.

YES

Check usb audio fi le in usb device

(MP3, WMA fi le is playable)

Check USB_5 V.

YES

Check USB

D+/D-

YES

Check IC501

(Pin U7, U8, A7, A8).

NONO

NO

NO

Check CN421.

Check USB jack

(CN461/ CN462).

Replace IC501.

3-16

ELECTRICAL TROUBLESHOOTIHG GUIDE

5. FLD DISPLAY CHECK

FLD DISPLAY CHECK

YES

Check

CN501 Pin13,14,15 input

voltage.

YES

Check if both end voltage

of FL+, FL- are over 2.9 V

VKK : over 25.6 V.

YES

Check CN400

connection and power

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

Pin9(3.3 V).

YES

Check

IC400(MC3401) voltage

Pin30 VKK: -25.8 V

Pin13, 43: 3.3 V.

NO

Refer to SMPS troubleshooting.

NO

Check CN400 connection.

YES

Check each
Pin voltage.

YES

OK

NO

If voltage is not 3.3 V.

YES

YES

Check

IC501->IC400

data communication

STB/ DATA/ CLK

YES

FLD light on?

YES

OK

Check IC400.

YES

OK

NO

Check input data

IC501 Pin F1, F2, G1.

YES

Check output data IC501 Pin D2.

YES

Check IC501.

YES

OK

3-17

NO

Replace IC400.

NO

Replace IC501.

ELECTRICAL TROUBLESHOOTIHG GUIDE

6. PWM MODULATION CHECK

PWM MODULATION PART CHECK

YES

Check

CN501 Pin7,8

(5.6 V)

YES

• Check IC601(TAS5548)
VDD 3.3 V - Pin9, 14, 35, 50.

• Check X601 (12.288 MHz).

YES

Check

X601(12.288 MHz)

operation.

YES

Check

IC601 Pin21 CLK

input.

NO

NO

Refer to

SMPS troubleshooting.

Check X601

(12.288 MHz).

YES

OK

NO

Replace X601(12.288 MHz).

YES

Check IC501

(MLC3730)

Pin B3: RESET

Pin A1: SDA

Pin A2: SCL

output.

YES

A

NO

Check line

resistor output

RST: R53E / SCL: R53C /

SDA: R53B.

YES

OK

3-18

NO

Replace R53E,R53C,R53B.

ELECTRICAL TROUBLESHOOTIHG GUIDE

A

YES

Check

IC601(TAS5548)

input data

Pin24

PWM wave.

YES

Check PWM

modulator output

FL: Pin48(-), 49(+)

FR: Pin46(-), 47(+).

Other output

check.

NO

NO

Check

IC601 DATA

input.

YES

OK

Check IC601.

YES

NO

Check each line resistor output.

NO

Replace

IC601.

OK

YES

OK

3-19

ELECTRICAL TROUBLESHOOTIHG GUIDE

7. POWER AMP PART CHECK

POWER AMP PART CHECK

YES

Check CN501

Pin10: 12 V

Pin1,2,3: 48 V.

YES

Check IC701

Pin25, 26, 55, 56 input voltage.

YES

Check IC700

Pin2, 6, 55: 12 V.

YES

Check IC700 Pin4, 5 input voltage.

YES

Check IC700 Pin28, 29, 52, 53 input voltage.

NO

Refer to SMPS troubleshooting.

NO

Check each line resistor output voltage.

YES

Check output

line coil.

YES

OK

NO

Replace the coil.

3-20

ELECTRICAL TROUBLESHOOTIHG GUIDE

8. TUNER / AUX FUNCTION CHECK

FUNCTION CHECK

YES

Check IC201

(CS5346) Pin23, 24,

26, 27 input.

YES

Check IC201

(CS5346) Pin41 output

data.

YES

Check

IC501(MLC3700)

input data.

YES

IC501(MLC3730)

output data.

NO

Check JK200, TU500.

Check IC201

Pin5: +3.3 V
Pin14: +5 V.

YES

Check IC201
Pin5: +3.3 V,

Pin6: High,

Pin14: +5 V.

NONO

Check CN501 Pin7, 8: +5.6 V.

Check IC201

NONO

Pin41: SDOUT,
Pin42: SLCK,
Pin43: LRCK,
Pin44: MCLK.

Replace IC201.

YES

OK

YES

3-21

ELECTRICAL TROUBLESHOOTIHG GUIDE

9. MIC FUNCTION CHECK

MIC FUNCTION

CHECK

YES

Check

IC420(S4308) pin3

input.

YES

Check

IC420(S4308) pin4

data output.

YES

Check

IC203(AK5358) pin1, 2

data input.

NO

NO

NO

Check JK421, JK422.

Check IC420

pin6: +5 V

YES

Check

IC203 pin5: +5 V

pin5: +3.3 V

NO

NO

Check CN501 pin7, 8: +5.6 V.

NO

Check IC423

pin1: +5 V.

YES

Replace IC201.

NO

Check IC203

PIN9: SCLK PIN10: MLCK

PIN11: LRCK

PIN12: ADC_DATA

YES

IC501(MLC3730) data output.

YES

OK

3-22

YES

YES

1. SDRAM

WAVEFORMS OF MAJOR CHECK POINT

1

2

3

4

2. AUDIO PATH

5

6

CLK

DATA

ADDRESS

CS

DAC_MCLK

DAC_BCK

IC502 Pin38

IC502 Pin53

IC502 Pin35

IC203 Pin19

IC501 Pin D2

IC501 Pin E1

3. USB

7

8

9

10

USB_5V

D+

D-

DAC_LRCK

DAC_DATA

IC501 Pin D1

IC501 Pin E2

IC501 Pin A8

IC501 Pin A7

3-23

3-24

3-25 3-26

VFD

FR-1

MAIN

(FR-4 EPOXY 2LAYER)

Wire Harness 15P

SMPS

(CEM-3 )

BT

FFC 10P

Wire Harness 15P

Front & KEY 1

FR-1

FFC 29P

FFC 10P

Wire Harness 12P

Wire

Harness

7P

Front & KEY 2

FR-1

FFC 29P

FCC 10P

FCC 10P

USB

Wire Harness 12P

VFD&IR

MIC & PTB

LED

AMP 2P

MIC

IR,X_LED

Wire Harness 7P

Wire Harness 4P

Wire Harness 4P

Wire Harness 5P

Wire Harness 5P

WIRING DIAGRAM

3-27 3-28

BLOCK DIAGRAMS

1. SYSTEM BLOCK DIAGRAM_1

MLC3730

1.2/3.3V

PWM

TAS5548DGG

PWM_MUTE

PWM_RST

MCS_LRCK/BCK/
DATA_OUT

AMP

TAS5631BPHD

12.288M

AMP_PDN

AMP_SD/OTW / PROTECT/ CLIP0(FRONT_AGL)

24M

32.768K

S4308

Mic 1

Mic 2

ADC

CS5346

PORTABLE

TUNER

AUX1

PTB_SENSE

MCS_MCLK/LRCK/BCK

ADC_DATA

MIC_SENSE

BT_TX/RX/RTS/
CTS/RST

BT

Module

MB8811C0

EAT61876201

PNZ-EAJ58881201­CN039533-AP01

MC3401

u-COM

MCS_TX/RX/CS

VFD_CS/CLK/DO

VFD

Jog 4ea

SPK_LED

KEY1,2 / VOL_A/B

FRONT1

SPK LED

FRONT2

KST-MWOO4MV0-S71W

EBL60720702

KEY3/DRV_VBUS2.0

LM37102D

USB1.1

USB2.0 OTG

2.0_D+/D-

1.1_D+/D-

IR

VFD

REMOCON

Debug_Console_IN/OUT

JTAG

NTRST/TDI/TMS/TCK/TDO/CHIP_RESET/RTCK

Console (TP)

3.7VA

AZ7027RTRE1

CHIP_RESET

MCS_RTC_3.0A

AZ7027RTRE1

P_SENSE

VFD_PWR_CTRL

PWR_CTRL

SMPS/
LDO’S

R5F100GEAFB

MICOM_RESET

SEARCH_A/B

Jog 1ea

MIC_VOL_A/B
BASS_VOL_A/B
TRAB_VOL_A/B
MEAS_VOL_A/B

ADC_RST

BT_CLK/DAT

Jog 1ea

REMOCON

AMP_READY

PWM_DAT/CLK

SDRAM

8MB

M12L64164A

M0 0~15
A 00~11

S.FLASH

4MB

W25Q64F

Main : 0IMMREB004H(M12L64164A)

SF_CS/SCK/MISO/
MOSI

Sub : EAN60700802(W9864G6JH)

W BT : EAN62459301 (4MB)
W/O BT : EAN55718402 (1MB)

EEPROM

2KB

M24C16

EEPROM
SCL/SDA

ADC_CLK/DAT

2. SYSTEM BLOCK DIAGRAM_2

3-29 3-30

SDRAM

(8MB)

Serial Flash

(4MB)

DB[0-15]

DMA[0-10]

2.0 D+, D-

TUNER L/R

PORT L/R

BT

PORTABLE

MLC3730

(176PIN)

24 MHz

3.3/5V

3.3V/1.2V

3.3V

SPI

I2C,RESET

I2C

3.3V

3.3V

VFD Driver

MC3501

IR

3.3V

FL+,FL-

Vkk

Key_1

FUNCTION KEY * 10 EA

LPF

PWM

TAS5548

AMP

TAS5631B

3.3V

CTL

I2C

12.288 MHz

PVDD(48V)/GVDD(12V)

TUNER

(AM/FM)

DAC_MCLK / BCK

/ LRCK / DAC_DATA

AUX L/R

AUX

Mic

Mic L/R

Mic AMP

S4308

Tuner

1.1 D+, D-

I2C

EEPROM

(2KByte)

3.3V

AMP_SD/OTW / PROTECT/ CLIP0

32.768 KHz

BT_SCL/SDA/TX/RX/RTS/CTS/RST

FRONT1 PCB

I/O U-COM

LC87FC096AVU

Volume * 3 EA

3.3V/5V

Main

VR

VFD PCB

USB 1

USB 2

MAIN + AMP PCB

SPK LED PCB

IR

Key_2

KEY cont

3.3V/12V

SPI

Key_3

USB REC KEY * 1 EA

FRONT2 PCB

3.3V/5V

Search

VR

3.3V

MIC JACK PCB

SPI

PORTABLE

Mic

M.Vol Jack 1

Jack 2

DRV_VBUS

LED

RED LED

Volume cont

USB 1

USB 2

Key_3

12V

ADC

(CS5346)

3. SMPS BLOCK DIAGRAM_1

3-31 3-32

++12

V

SMPS

+5

.6V

A

FAN X 1

TU50

0

TUNER

YST996

IC504

EEPROM

24C

S16

IC601

TAS5548

IC50

1

MCS

MLC3730

IC502

SDRAM

6

4

M

b

RF IC

I

C509

AZ1117

US

B

HUB

SMSC

IC400

MC3

4

0

1

VFD DRV

RMC

1.2VA

IC51

0

FLASH

32Mb

IC

510

LDO

AZ111

7

FRONT B’

d

U

SB

P

W

R

LM3710

2D

MOTOR

AM3

053

S

DV

CC_5V

+3.7VA

V

F

D

5m

A

3m

A

160mA

25mA

40mA

+5V

3

70m

A

LE

D

STBY

20mA

2

mA

2.2

~ 2

.

6A

1

00m

A

45

0mA

Pi

ck u

p

8

0mA

80m

A

1

0mA??

130mA

-> 0

mA

2

0mA

2

0mA??

160mA??

A

D

C

IC201

CS534

6

41m

A

VKK

FL

±

51mA

1A

273m

A

Bluetoot

h

O

ption

25mA

CP Chip

O

ption

7m

A

IC700

AMP

TA

S5631BPH

D

IC202

LDO

LM37102D

IC507

LDO

TJ3965

IC506

RESET

AZ

702

7

IC50

5

PWR SE

NS

AZ702

7

2m

A

2mA

23m

A

DVCC_3.3

V

8

0

m

A?

U

SB HUB

IC509

AZ11

17

USB HUB

M

CS

_

1.2V

50m

A?

37

4

mA

P

WR_CTRL

3

8mA?

UBS2.0_OTG_V

BUS

(MLC37

3

0)

DRV_VBUS2.0

3.3V

A

MCS_RTC_3.0A

V

D

D30

RTC

(MLC3730)

120m

A

2mA?

IC5

01

u

- COM

2

3mA

283m

A

P

WR_CTRL

25mA

SPK

LED B’d

(16ea)

160mA

360mA

5

6m

A

368mA

1

.4

A

65

%

60

%

65

%

50

%

MIC AMP

IC

42

0

S43

08

10m

A

VFD

FRONT1

FRONT2

SPK
LED

4. SMPS BLOCK DIAGRAM_2

3-33 3-34

PVDD

+

Noise

Filter

Block

(X-cap

Line Filter)

Snubber

Block

Main

SMPS IC

Block

T
R
A
N

S

Snubber

Block

Photo coupler

Photo coupler

Photo coupler

FL+

FL-

Vkk

On/Off

12V LDO

12 V

5.6 VA

P.CTL

On/Off

AMP

SMPS IC

With FET

Block

F
U
S

E

Y-Cap

Y-Cap

T
R
A
N
S

CN901

Feedback

Feedback

3-35 3-36

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL
TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL

COMPONENTS ARE SHADED ON THE SCHEMATIC
FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER
FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE 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.

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 ST

CAUTION:

Danger if fuse is incorrectly replaced.

Replace only with the type identical to fuse rating

and(or) model name described in main label.

Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.

SMPS

EAX65422801-SD_Rev0_1.0_Working

2014. 02. 21

3-37 3-38

2. MAIN_DSP CIRCUIT DIAGRAM

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 ST

MAIN_DSP

EAX65685801-SD(#01)_Rev7_1.6

2014. 02. 21

3-39 3-40

3. MAIN_ADC/PWM CIRCUIT DIAGRAM

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 ST

MAIN_ADC/PWM

EAX65685801-SD(#02)_Rev7_1.6

2014. 02. 21

3-41 3-42

4. MAIN_AMP CIRCUIT DIAGRAM

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 ST

MAIN_AMP

EAX65685801-SD(#03)_Rev7_1.6

2014. 02. 21

3-43 3-44

5. FRONT_KEY/USB CIRCUIT DIAGRAM

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 ST

FRONT_KEY/USB

EAX65667301-SD_Rev14_1.5

2014. 02. 21

3-45 3-46

6. FRONT_VFD CIRCUIT DIAGRAM

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 ST

FRONT_VFD

EAX65668701-SD_Rev14_1.5

2014. 02. 21

3-47 3-48

7. FRONT_KEY/PTB CIRCUIT DIAGRAM

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 ST

FRONT_KEY/PTB

EAX65689401-SD_Rev14_1.6

2014. 02. 21

3-49 3-50

8. FRONT_MIC CIRCUIT DIAGRAM

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 ST

FRONT_MIC

EAX65689601-SD_Rev14_1.5

2014. 02. 21

3-51 3-52

9. SPK_LED CIRCUIT DIAGRAM

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 ST

SPK_LED

EAX65690301-SD_Rev9_1.5

2014. 02. 21

3-53 3-54

10. X_LED/RCU2 CIRCUIT DIAGRAM

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 ST

X_LED/RCU2

EAX65632101-SD_Rev4_1.3

2014. 02. 21

3-55 3-56

CIRCUIT VOLTAGE CHART

1. ICs 2. CAPACITORS

Designator Description Polarity (+) Polarity (-)

OM5540 FRONT

C460 Capacitor,Ceramic,Chip 5.57 0

C462 Capacitor,Ceramic,Chip 5.11 0

OM5540 MIC

C429 Capacitor,AL,Radial 5.03 0

C430 Capacitor,AL,Radial 2.02 0

OM5540 VFD

C401 Capacitor,AL,Radial 3.28 0

C410 Capacitor,AL,Radial 3.19 0

OM5540 SPK LED

C483 Capacitor,AL,Radial 3.18 0

OM5540 MAIN

C501 Capacitor,AL,Chip 3.28 0

C508 Capacitor,AL,Chip 3.28 0

C526 Capacitor,AL,Chip 1.19 0

C591 Capacitor,AL,Chip 3.23 0

C706 Capacitor,AL,Chip 12.19 0

C714 Capacitor,AL,Radial 48.7 0

C731 Capacitor,AL,Radial 48.7 0

C244 Capacitor,AL,Chip 5.03 0

C618 Capacitor,AL,Chip 3.28 0

C624 Capacitor,AL,Chip 12.18 0

C643 Capacitor,AL,Chip 5.03 0

Designator PIN Number Description Part Site Specifi cation SPEC

REAL

VALUE

CHECK

LOC.

IC101 48

IC,Microcontrollers
R5F100GHAFB

Supply Voltage(VDD) 3.10~3.50 3.28 L108

IC201

6,35,46

IC,A/D Converter
CS5346

Core Supply Voltage(VDD) 3.13~3.46 3.27 C231

14 PLL Supply Voltage(VDDA) 4.8~5.2 5.03 C229

IC202

IN 5.6VA

IC,LDO Voltage Regulator

TJ4220GDP-ADJ 6.5V ADJ 0W SOP R/TP 8P

- TAEJIN TECHNOLOGY CO., LTD.

5.6V±0.2 5.65

-

OUT 5VU 5V±0.2 5.03

IC203

6

IC,A/D Converter
AK5358

Supply Voltage(VDD) 4.8~5.2 5.03 C242

5 PLL Supply Voltage(VDDA) 3.13~3.46 3.28 C241

IC501

J4

IC, DIGITAL SIGNAL PROCESSORS
MLC3730

Core Supply Voltage(VDD12INT) 1.08~1.32 1.18 C517

A9,E9,J14,U4 Core Supply Voltage(VDD12CORE) 1.08~1.32 1.18 C535

T10 Core Supply Voltage(VDD12ALIVE) 1.08~1.32 1.18 C542

P12 Core Supply Voltage(VDD12PLL) 1.08~1.32 1.19 C548

P9 Core Supply Voltage(VDD12USB20) 1.08~1.32 1.19 C538

A10,D4,D14,P4,P14 IO Supply Voltage(VDD33IO) 3.00~3.60 3.28 C524

U9 IO Supply Voltage(VDD33OSC) 3.00~3.60 3.28 C539

A4 IO Supply Voltage(VDD33ADC) 3.00~3.60 3.28 C527

B7 IO Supply Voltage(VDD33USB11) 3.00~3.60 3.28 C531

U5,U6 IO Supply Voltage(VDD33xUDB20) 3.00~3.60 3.28 C532

T16 VDD30RTC 2.75~3.30 3.23 C545

IC502 1,3,9,14,27,43,49,

IC,SDRAM
M12L64164A-5TG2Y 64MBIT

Core Supply Voltage(VDD) 3.13~3.46 3.29 -

IC503 8

IC,Serial Flash Memory

Supply Voltage(VDD) 3.13~3.46 3.29 C554

IC505 -- - -

3.63

-

3.00

IC507

IN 5.6VA

IC,LDO Voltage Regulator

AZ1117BH-1.2TRE1 15V 1.2V 0W S OT-223 R/TP 3P

- BCD

5.6V±0.2 4.86

-

OUT VCC_5V 5V±0.2 3.28

IC508

IN 3.3VA

IC,LDO Voltage Regulator

LM37102D 2.25V TO 16V ADJ 770m W SOP R/TP 8P

- TAEJIN TECHNO LOGY CO., LTD.

3.3V±0.15 3.29

-

OUT VDD12 1.2V±0.1 1.20

IC510

IN 5.0VA

IC,LDO Voltage Regulator

AZ1117BH-ADJTRE1 15V ADJ 0W SOT223 R/TP 3P

- BCD

4.8V±0.3 4.87

-

OUT 3.3VA 3.3V±0.15 3.29

IC601

14,35,50

IC,Sound/Audio Processor
TAS5548

Core Supply Voltage(VDD) 1.71~1.89 3.27 C612

9 PLL Supply Voltage(VDDA) 3.13~3.46 3.28 C611

IC700

25,26,55,56,64

IC,Audio Amplifi er
TAS5631

Supply Voltage(VDD) 11.8~13.3 12.0 L706

30,31,38,39,42,43,50,51 PVDD Supply Voltage(VDDA) 45.6~50.4 48.7 C734

3-57 3-58

3. CONNECTORS

No. PIN NAME Output Voltage SPEC

CN400

1 FL+ -18.11

2 FL- -20.77

3 Vkk -23.42

4 DGND 0

5 VFD_DO

6 VFD_CLK

7 VFD_CS

8 DGND 0

9 3.3VA 3.28

10 REMOCON

CN421

1 DGND 0

2 D1_P

3 D1_M

4 DGND 0

5 D2_P

6 D2_M

7 5.6VA 5.65

8 KEY3 3.28

9 USB_P_CTRL 3

10 SEARCH_A 3.27

11 SEARCH_B 3.27

12 DGND 0

CN422

1 DVCC_5V 5.03

2 MIC SENSE

3 MIC SIG

4 AGND

CN482

1 3.3VA 3.29

2 REMOCON

3 DGND

4 W LED

5 12V 12.05

CN501

1 PVDD 46.7 43.7 ~ 48.3

2 PVDD 46.7 43.7 ~ 48.3

3 PVDD 46.7 43.7 ~ 48.3

4 DGND 0

5 DGND 0

6 DGND 0

7 5.6VA 5.69 5.4 ~ 5.8

8 5.6VA 5.69 5.4 ~ 5.8

9 DGND 0

No. PIN NAME Output Voltage SPEC

10 12V 12.19 11.4 ~ 12.6

11 PWR-CTRL 2.23 3.1 ~ 3.4

12 DGND 0

13 VKK -23.54 -23 ~ -29

14 FL- -20.84 -20.1 ~ -24.4

15 FL+ -18 -17.5 ~ -22.1

CN502

1 DGND 0 0

2 KEY2 3.28 2.5 ~ 2.75

3 DGND 0 0

4 TRAB_VOL A 3.28 2.8 ~ 3.3

5 TRAB_VOL B 3.28 2.8 ~ 3.4

6 DGND 0 0

7 MEAS_VOL A 3.28 3.1 ~ 3.5

8 MEAS_VOL B 3.28 3.1 ~ 3.5

9 BASS_VOL A 3.28 3.1 ~ 3.5

10 BASS_VOL B 3.28 3.1 ~ 3.5

11 DGND 0 0

12 KEY1 3.28 3.1 ~ 3.5

13 DGND 0 0

14 MIC_VOL_A 3.28 3.1 ~ 3.5

15 MIC_VOL_B 3.28 3.1 ~ 3.5

16 DGND 0 0

17 MAIN_VOL A 3.28 3.1 ~ 3.5

18 DGND 0 0

19 MAIN_VOL B 3.28 3.1 ~ 3.5

20 AGND 0 0

21 MIC SIG 3.28 3.1 ~ 3.5

22 MIC SENSE 3.28 3.1 ~ 3.5

23 AGND 0 0

24 PTB_R

25 AGND 0 0

26 PTB_L

27 PTB SENSE 3.3 3.1 ~ 3.5

28 DVCC_5V 5 4.8 ~ 5.2

29 AGND 0 0

CN504

1 VDD 3.27

2 RESET 3.28

3 CTS

4 RTS

5 RXD

6 GND 0

7 TXD

8 GND 0

No. PIN NAME Output Voltage SPEC

9 SCL

10 SDA

CN507

1 12V 12,19

2 DGND 0

3 W LED

4 SPK LED

5 IR2

6 DGND 0

7 3.3VA 3.28

3-59 3-60

PRINTED CIRCUIT BOARD DIAGRAMS

1. SMPS P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

NOTE) Warning

Parts that are critical with respect to risk
of fire or electrical shock.

3-61 3-62

2. MAIN P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

3-63 3-64

3. FRONT_KEY/USB P.C.BOARD

(TOP VIEW)

4. FRONT_VFD P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

(BOTTOM VIEW)

3-65 3-66

5. FRONT_KEY/PTB P.C.BOARD

(TOP VIEW)

6. FRONT_MIC P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

(BOTTOM VIEW)

3-67 3-68

7. SPK_LED P.C.BOARD

(TOP VIEW)

8. X_LED/RCU2 P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

(BOTTOM VIEW)