Internal Use Only
Website http://biz.lgservice.com
SERVICE MANUAL
MODEL: CM4340 (CM4340, CMS4340F)
Mini Hi-Fi System
SERVICE MANUAL
MODEL: CM4340
(CM4340, CMS4340F)
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
P/NO : AFN76615080
JULY , 2014
CONTENTS
SECTION
SECTION
SECTION
SECTION
1 ........ GENERAL
2 ........ CABINET & MAIN CHASSIS
3 ........ ELECTRICAL
4 ........ REPLACEMENT PARTS LIST
1-1
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 ................................................................................... 1-8
1. MCS PROGRAM....................................................................................................................................... 1-8
2. EQ PROGRAM ......................................................................................................................................... 1-9
SPECIFICATIONS ..................................................................................................................................... 1-10
1-2
SERVICING PRECAUTIONS
NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
Storage in conductive bag
Drop impact
2. Repair notes
1) 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/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.
NEVER look directly at the laser beam, and don’t allow
contact with fingers or other exposed skin.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used
for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton
swab should be used, taking care not to distort lens.
Pressure
Magnet
Pressure
How to hold the pick-up
Cotton swab
Conductive Sheet
6) Never attempt to disassemble the pick-up.
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.
(Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much
of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
1-3
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components
can be damaged, and for that reason components should be handled with care.
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 magnetism 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 unit
2) 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 MΩ)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static 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.
Armband
Resistor
(1 MΩ)
Resistor
(1 MΩ)
Conductive
Sheet
1-4
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.
1-5
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).
1-6
SERVICE INFORMATION FOR EEPROM
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 and
make changes with remote control
‘skip, mode, play’ key.
DETECT NEW EEPROM
(OPTION EDIT SCREEN)
NAME
HEX
OPT0
OPT1
OPT2
OPT3
OPT4
OPT5
OPT6
OPT7
OPT8
OPT9
09
00
00
02
00
01
81
06
00
00
Press ENTER key
FLD ‘write ok’
Remote control ‘Fwd skip’ +
Front ‘STOP’ push same timing
FLD ‘E2P CLR’
Completed
1-7
PROGRAM DOWNLOAD & UPDATE GUIDE
1. MCS PROGRAM
Download program file name must be
- HG440_CM4740_DATE.bin : CM4740 4M Flash
- HG420_CM4740_DATE.bin : CM4740 2M Flash
- HG440_CM464P_DATE.bin : CM4640P (With Ipod)
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
↓
FINISH
↓
POWER OFF MANUALLY
← When completed, remove USB device.
1-8
2. EQ PROGRAM
Download program file name must be EQ_PRG_CM4740_***.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.
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
↓
POWER OFF AUTOMATICALLY
← When completed, remove USB device.
1-9
SPECIFICATIONS
• GENERAL
Power requirements
Power consumption
Dimensions (W x H x D)
Net Weight (Approx.)
Operating temperature
Operating humidity
Bus Power Supply
Refer to the main label.
Refer to the main label.
(206 x 308 x 284) mm
3.0 kg
5 °C to 35 °C (41 °F to 95 °F)
5 % to 90 %
5V
500 mA
• INPUTS
AUX IN
Port In
2.0 Vrms (1 kHz, 0 dB), 75 Ω, RCA jack (L, R)
1.2 Vrms (3.5 mm stereo jack)Amplifier
• TUNER
FM Tuning Range
AM Tuning Range (Optional)
87.5 to 108.0 MHz or 87.50 to 108.00 MHz
522 to 1620 kHz, 520 to 1710 kHz or 522 to 1710 kHz
• AMPLIFIER
Stereo mode
Surround mode
110 W + 110 W (4 Ω at 1 kHz, THD 20 %)
110 W + 110 W (4 Ω at 1 kHz, THD 20 %)
Front
• CD
Frequency Response
Signal-to-noise ratio
Dynamic range
100 to 20,000 Hz
75 dB
75 dB
• FRONT SPEAKER
Model
Type
Impedance
Rated Input Power
Max. Input power
Net Dimensions (W x H x D)
Net Weight
CMS4340F
2 Way 2 Speaker
4Ω
110 W
220 W
(200 x 306 x 200) mm
2.2 kg
• Design and specifications are subject to change without notice
1-10
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS..................................................................................................................................... 2-3
1.
2.
3.
4.
CABINET AND MAIN FRAME SECTION (CM4340) ................................................................................ 2-3
MECHANISM DECK SECTION (DP17TM3) ............................................................................................ 2-5
PACKING ACCESSORY SECTION ......................................................................................................... 2-7
SPEAKER SECTION ................................................................................................................................ 2-8
2-1
MEMO
2-2
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION (CM4340)
NOTES) THE EXCLAMATION POINT WITHIN AN
464
EQUILATERAL TRIANGLE IS INTENDED
TO ALERT THE SERVICE PERSONNEL
TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION IN SERVICE
LITERATURE.
464
261
260L
464
F
262
SMPS
E
A47
463
264
464
463
464
464
255
263
B
A
CABLE1
A43
FRONT
464
464
255
A42
A46
464
464
260R
464
MAIN
D
A
E
C
B
253
A44
251
265
D
259
C
266
464
F
300
266
2. MECHANISM DECK SECTION (DP17TM3)
1439
1002
1005
1026
1003
A001
1001
1004
1030
1024
1437
1437
1024
1024
1012
1049
1437
1013
1024
1015
1016
1020
1011
A006
1019
A005
1043
1018
1045
1439
3. PACKING ACCESSORY SECTION
801 Instruction Ass'y
808 Battery
825 FM Wire Antenna
900 Remote Control
803 Packing
804 Bag
803 Packing
802 Box
4. SPEAKER SECTION
• FRONT SPEAKER (CMS4340F)
A60
SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE................................................................................................................... 3-2
1.
2.
3.
4.
5.
NO POWER ............................................................................................................................................ 3-2
NO BOOTING WHEN POWER ON THE SET ....................................................................................... 3-4
VFD IS NOT DISPLAYED WHEN POWER ON THE SET..................................................................... 3-5
NO OPERATION OF MD ....................................................................................................................... 3-6
NO SOUND .......................................................................................................................................... 3-11
AUDIO ELECTRICAL TROUBLESHOOTING GUIDE .................................................................. 3-17
1.
2.
3.
4.
5.
6.
7.
8.
POWER (SMPS)................................................................................................................................... 3-17
MCS PART CHECK.............................................................................................................................. 3-20
IC504(M24C16) CHECK....................................................................................................................... 3-20
FLD DISPLAY CHECK ......................................................................................................................... 3-21
PWM MODULATION CHECK .............................................................................................................. 3-22
POWER AMP PART CHECK ............................................................................................................... 3-24
TUNER / AUX FUNCTION CHECK...................................................................................................... 3-25
TUNER FUNCTION CHECK ................................................................................................................ 3-26
CDP ELECTRICAL TROUBLESHOOTING GUIDE ....................................................................... 3-27
1. CD FUNCTION ..................................................................................................................................... 3-27
2. DOUBLE USB FUNCTION ................................................................................................................... 3-28
WAVEFORMS OF MAJOR CHECK POINT ..................................................................................... 3-29
1.
2.
3.
4.
SDRAM ................................................................................................................................................. 3-29
SERVO ................................................................................................................................................. 3-29
AUDIO PATH ........................................................................................................................................ 3-30
USB....................................................................................................................................................... 3-31
WIRING DIAGRAM ................................................................................................................................... 3-33
BLOCK DIAGRAMS ................................................................................................................................. 3-35
1.
2.
3.
4.
SYSTEM BLOCK DIAGRAM ................................................................................................................ 3-35
SMPS BLOCK DIAGRAM..................................................................................................................... 3-37
AUDIO PATH BLOCK DIAGRAM......................................................................................................... 3-39
POWER DIAGRAM .............................................................................................................................. 3-41
CIRCUIT DIAGRAMS ............................................................................................................................... 3-43
1.
2.
3.
4.
5.
6.
SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-43
MAIN - DSP CIRCUIT DIAGRAM......................................................................................................... 3-45
MAIN - SERVO CIRCUIT DIAGRAM ................................................................................................... 3-47
MAIN - ADC/ PWM CIRCUIT DIAGRAM ............................................................................................. 3-49
MAIN - AMP CIRCUIT DIAGRAM ........................................................................................................ 3-51
FRONT CIRCUIT DIAGRAM ................................................................................................................ 3-53
CIRCUIT VOLTAGE CHART ................................................................................................................. 3-55
1. ICs......................................................................................................................................................... 3-55
2. CAPACITORS....................................................................................................................................... 3-57
PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-59
1. SMPS P.C.BOARD ............................................................................................................................... 3-59
2. MAIN P.C.BOARD ................................................................................................................................ 3-61
3. FRONT P.C.BOARD............................................................................................................................. 3-63
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.
1-1. FUSE & BRIDGE DIODE
1-1-1. Solution
Please check and replace F901, BD901, TH901 or TH903 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 or TH903 is normal or open.
1-1-3. Service hint (Any picture / Remark)
< F901 >
If F901 is not short-circuit,
replace it with a same
specifications one.
< BD901 >
If BD901 is short-circuit,
replace it with a new one.
3-2
< TH901 >
If TH901 is open,
replace it with a new one.
ONE POINT REPAIR GUIDE
NO POWER
If the unit doesn’t work by no power problem, repair the set according to the following
guide.
1-2. D951
1-2-1. Solution
Please check and replace D951 on SMPS board.
1-2-2. 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.
1-2-3. Service hint (Any picture / Remark)
< SMPS schematic 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.
2-1. FLASH MEMORY
2-1-1. Solution
Please check and replace IC503 on MAIN board.
2-1-2. 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.
2-1-3. Service hint (Any picture / Remark)
PWR_CTRL(R53D)
KEY1(R542)
IC501
< Signal check point >
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.
3-1. VFD
3-1-1. Solution
Please check and replace DIG302 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 IC501 outputs VFD_D0, VFD_CLK and VFD_STB to the FRONT board.
3) Check the GR signal(pulse signal) of IC408 on the FRONT board.
Check the SG signal(pulse signal) of IC408 on the FRONT board.
If the GR and SG signal isn’t output, replace IC408 with a new one.
If the GR and SG signal is output, replace DIG302 with a new one.
3-1-3. Service hint (Any picture / Remark)
GR SIGNAL
ABOUT 30V
GR signal
SG signal
SG SIGNAL
ABOUT 30V
Click the picture,
and then drag to enlarge it.
Check the waveform on details.
< Waveform of GR and SG signal >
3-5
ONE POINT REPAIR GUIDE
4. NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data
from a CD disc if the servo motors in MD don’t work. This step is for checking the
SPINDLE MOTOR among them.
4-1. SPINDLE MOTOR
4-1-1. Solution
Please check and replace IC407, IC408 on MAIN board.
4-1-2. How to troubleshoot (Countermeasure)
1) Check the SPDO signal from pin24 of IC407.
If no signal, check 3.3 V(RF) and X400.
2) Check the SPIN- & SPIN+ from IC408 to CN405 for driving SPINDLE motor. It is about 3.6 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 spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
4-1-3. Service hint (Any picture / Remark)
Sp+
Pin17 to CN405
About 3.6Vpp
SpPin18 to CN405
< Waveform of SP- & SP+
for driving SPINDLE motor >
< Signal check point >
3-6
ONE POINT REPAIR GUIDE
NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data
from a CD disc if the servo motors in MD don’t work. This step is for checking the
SLED MOTOR among them.
4-2. SLED MOTOR
4-2-1. Solution
Please check and replace IC407, IC408 on MAIN board.
4-2-2. How to troubleshoot (Countermeasure)
1) Check the SLDO signal from Pin23 of IC407.
If no signal, check 3.3 V(RF) and X400.
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 pickup module.
Please check the function after changing another MD.
4-2-3. Service hint (Any picture / Remark)
SLED+
Pin11 to CN405
SL- TO CN405
SL+ TO CN405
SLEDPin12 to CN405
< Waveform of SLED- & SLED+
for driving SLED motor >
< Signal check point >
3-7
ONE POINT REPAIR GUIDE
NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data
from a CD disc if the servo motors in MD don’t work. This step is for checking the
TRAY OPEN / CLOSE MOTOR among them.
4-3. TRAY OPEN / CLOSE MOTOR
4-3-1. Solution
Please check and replace IC407, IC408 on MAIN board.
4-3-2. How to troubleshoot (Countermeasure)
1) Check MOT_OPEN & MOT_CLOSE signals from Pin K4, L4 of IC501 to IC408.
If no signal, check +1.8 V & + 5 V to IC408.
2) Check LOAD± from IC408 to CN405 for driving the tray open / close motor. It is about 3.85 Vp-p.
If no signal, check +5 V to IC408. 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.
4-3-3. Service hint (Any picture / Remark)
LOAD+
Pin9 to CN405
MOT_OPEN
Pin7 to CN405
MOT_OPEN
CLOSE
LO- TO CN405
LO+ TO CN405
LOADPin10 to CN405
< Waveform
for driving TRAY open / close motor >
MOT_CLOSE
Pin6 to CN405
< Signal check point >
3-8
ONE POINT REPAIR GUIDE
NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data
from a CD disc if the pickup module in MD doesn’t work. This step is for checking the
LASER TRACKING ACTUATOR.
4-4. LASER TRACKING ACTUATOR
4-4-1. Solution
Please check and replace IC407, IC408 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 Pin22 of IC407.
If no signal, check 3.3 V(RF) and X400.
2) Check TR- & TR+ from IC408 to CN408 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 CN405 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.
Please check the function after changing another MD.
4-4-3. Service hint (Any picture / Remark)
TRPin15 to CN405
TR+
Pin16 to CN405
< Waveform of TR±
for driving TRACKING actuator >
< Signal check point >
3-9
ONE POINT REPAIR GUIDE
NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data
from a CD disc if the pickup module in MD doesn’t work. This step is for checking the
LASER FOCUSING ACTUATOR.
4-5. LASER FOCUSING ACTUATOR
4-5-1. Solution
Please check and replace IC407, IC408 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 Pin21 of IC407.
If no signal, check 3.3 V(RF) and X400.
2) Check F- & F+ from IC408 to CN405 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 CN405 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.
Please check the function after changing another MD.
4-5-3. Service hint (Any picture / Remark)
FPin13 to CN405
F+
Pin14 to CN405
< Waveform of TR±
for driving FOCUSING actuator >
< Signal check point >
3-10
ONE POINT REPAIR GUIDE
5. NO SOUND
There is no sound output in the CD FUNCTION, repair the set according to the following guide.
5-1. IN THE CD FUNCTION
5-1-1. Solution
Please check and replace IC501, IC601 on MAIN board.
5-1-2. How to troubleshoot (Countermeasure)
1) Check CD_BCLK, CD_LRCK, & CD_DOUTA signals from IC407 to IC501.
If no signal, check if the RF & servo signals from MD is entered to IC407.
Refer to the “No operation of MD” guide on Item 4.
2) Check the following I2S signal flow. < I2S audio signal Interface >
- DAC_BCK :
IC501_Pin E1 --> IC601_Pin23
- DAC_LRCK :
IC501_Pin D1 --> IC601_Pin22 (44.1 kHz)
- DAC_DATA :
IC501_Pin E2 --> IC601_Pin24
- DAC_MCLK : IC501_Pin D2 --> IC401_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 if “Digital audio AMP block” on Item 5-2 is normal.
5-1-3. Service hint (Any picture / Remark)
P/UP
IC407
LC78615E
(New)
M
DSP IC501
MLC3730
MCS_MCLK (16.93MHz)
MCS_BCK(1.4MHz)
176PIN BGA
MCS_DATA_OUT
MCS_LRCK(44.1KHz)
< Waveform of I2S audio interface signals >
FR,FL
12.288MHZ
TAS5612LA
PWM
TAS5548
Woofer
TAS5612LA
< I2S Signal Flow >
3-11
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according
to the following guide.
5-2. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS)
5-2-1. Solution
Please check and replace IC701, IC702 on MAIN board.
5-2-2. How to troubleshoot (Countermeasure)
1) Check PWM_FL±, PWM_FR± & PWM_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 L710, L711, L712 and L713 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 Ω, the IC must be damaged.
b. After removing the heat sink, replace it with a new one.
5-2-3. Service hint (Any picture / Remark)
L711
IC702
L712
L710
IC701
L713
< Signal check point >
3-12
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the USB FUNCTION, repair the set according to the
following guide.
5-3. IN THE USB FUNCTION
5-3-1. Solution
Please check and replace IC501 on MAIN board & IC302 on USB board.
5-3-2. How to troubleshoot (Countermeasure)
1) Check +5V_USB to USB board.
If the USB LED are turned on, the voltage is okay, if so not, check +5.6 V to pin6 of CN302.
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 IC501.
b. Check USB± signals to CN302(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” on item 5-2 is normal.
5-3-3. Service hint (Any picture / Remark)
DSP IC501
MLC3730
176PIN BGA
USB1_Ds
USB2_Ds
D- to pin 1&4 of CN302
D+ to pin 2&5 of CN302
< Waveform of USB D± signal >
FR,FL
12.288MHZ
TAS5612LA
PWM
TAS5548
Woofer
TAS5612LA
< USB function signal flow >
3-13
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the AUX FUNCTION, repair the set according to the
following guide.
5-4. IN THE AUX FUNCTION
5-4-1. Solution
Please check and replace IC201 on MAIN board.
5-4-2. 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 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.
5-4-3. Service hint (Any picture / Remark)
ADC˻DATA to R215
MCS˻LRCK to R219
AUX˻R to R227
DSP IC501
MLC3730
176PIN BGA
AUX
AUX_L/R
AUX˻L to R226
IC201
CS5346
MCS˻BCK to R216
MCS˻MCLK to R220
< Signal check point >
FR,FL
12.288MHZ
TAS5612LA
PWM
TAS5548
Woofer
TAS5612LA
< AUX function signal flow >
3-14
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the TUNER FUNCTION, repair the set according to the
following guide.
5-5. IN THE TUNER FUNCTION
5-5-1. Solution
Please check and replace IC201, TU500 on MAIN board.
5-5-2. 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 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.
5-5-3. Service hint (Any picture / Remark)
DSP IC501
MLC3730
176PIN BGA
TUNER
A
TUNER_L/R
IC201
CS5346
TUNER˻L to C214
TUNER˻R to C215
< Signal check point >
FR,FL
12.288MHZ
TAS5612LA
PWM
TAS5548
Woofer
TAS5612LA
< TUNER IN function signal flow >
3-15
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the PORTABLE FUNCTION, repair the set according to
the following guide.
5-6. IN THE PORTABLE FUNCTION
5-6-1. Solution
Please check and replace IC201 on MAIN board.
5-6-2. 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 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.
5-6-3. Service hint (Any picture / Remark)
PTB˻L to R229
PTB˻R to R228
DSP IC501
MLC3730
176PIN BGA
PTB_L/R
Portable
IC201
CS5346
< Signal check point >
FR,FL
12.288MHZ
TAS5612LA
PWM
TAS5548
Woofer
TAS5612LA
< PORTABLE function signal flow >
3-16
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
1. POWER (SMPS)
No 5.6 VA
YES
F901 normal?
NO
Replace F901 (Use the same fuse).
YES
BD901 normal?
NO
Replace BD901.
YES
TH901(TH903) normal?
NO
Replace TH901.
YES
Is Vcc
(10 V ~ 18 V) supplied to
IC901 Pin7?
NO
D902 normal?
NO
Check or replace D902.
YES
D933 / D934 normal?
NO
Replace D933 / D934.
YES
Is there
about 2.5 V at
IC941 Pin1?
NO
Replace IC941.
YES
D935 normal?
NO
Replace D935.
YES
D932 normal?
NO
Replace D932.
YES
D931 normal?
NO
YES
Power line of main PCB is short.
3-17
Replace D931.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
No PVDD
YES
F901 normal?
NO
Replace F901 (Use the same fuse).
YES
BD901 normal?
NO
Replace BD901.
YES
TH901(TH903) normal?
Is Vcc
(10 V ~ 18 V) supplied to
IC911 Pin4?
NO
Replace TH901.
NO
D903 normal?
NO
YES
Check or replace D903.
YES
NO
Q911 base "H"?
YES
• Check P-CTRL "H" signal from MCS.
• Check PC902.
Check or replace Q911.
Q901 normal?
NO
Replace Q901.
YES
D951 normal?
NO
Replace D951.
YES
Is there about 2.5 V
at IC951 Pin1?
NO
Replace IC951.
YES
Power line of main PCB is short.
3-18
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
No 12 V
YES
Is Vcc (15 V)
supplied to IC931?
NO
Check or replace D935.
YES
IC931 Pin4 “H”?
NO
Check P-CTRL “H” signal
from MCS.
YES
Check or replace IC931.
No VFD
YES
D931 normal?
NO
Check or replace D931.
YES
ZD931 normal?
NO
Check or replace ZD931.
YES
Q501 / Q502 normal?
NO
YES
Check or replace VFD.
3-19
Check or replace Q501 / Q502.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
2. MCS PART CHECK
MCS PART CHECK
YES
Check if
voltage of CN501 Pin7
is 5.6 VA.
NO
Refer to
SMPS troubleshooting.
YES
Check if IC510
have 3.3 V output.
NO
Check and change IC510.
YES
Check if IC508
have 1.2 V output.
NO
Check and change IC508.
YES
X501: 32.768 kHz,
X500: 24 MHz,
Check the operation.
YES
OK
3. IC504(M24C16) CHECK
CHECK IC501 PIN.
YES
Check pinC2, pinB1
DATA : CLK
YES
NO
Check MCS
voltage 3.3 VA.
Refer to MCS troubleshooting.
YES
Check MCS.
YES
OK
NO
OK
3-20
NO
Replace MCS.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
4. FLD DISPLAY CHECK
FLD DISPLAY CHECK
YES
Check
CN501 Pin13,14,15 input
voltage.
NO
Refer to SMPS troubleshooting.
YES
Check if both end voltage
of FL+, FL- are over 2.9 V
VKK : over 25.6 V.
YES
Check CN301
connection and power
Pin1, 2, 3(FL+, FL-, VKK),
Pin8(5.6 V).
NO
Check CN301 connection.
YES
Check each
Pin voltage.
YES
YES
OK
Check
IC301(MC3401) voltage
Pin30 VKK: -25.8 V
Pin13, 43: 3.3 V.
NO
If voltage is not 3.4 V.
YES
Check IC301.
YES
NO
Replace IC301.
YES
OK
Check
IC501->IC301
data communication
STB/ DATA/ CLK
NO
Check input data
IC501 Pin F1,F2,G1.
YES
Check output data IC501 Pin D2.
YES
FLD light on?
YES
OK
YES
Check IC501.
YES
OK
3-21
NO
Replace IC501.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
5. PWM MODULATION CHECK
PWM MODULATION PART CHECK
YES
Check
CN501 Pin7,8
(5.6 V)
NO
Refer to
SMPS troubleshooting.
YES
• Check IC601(TAS5548)
VDD 3.3 V - Pin9,14.35,50.
• Check X601 (12.288 MHz).
YES
Check
X601(12.288 MHz)
operation.
NO
Check X601
(12.288 MHz).
NO
Replace X601(12.288 MHz).
YES
YES
Check
IC601 Pin21 CLK
input.
OK
YES
Check IC501
(MLC3730)
Pin B3: RESET
Pin A1: SDA
Pin A2: SCL
output.
NO
Check line
resistor output
RST: R53E / SCL: R53C /
SDA: R53B.
YES
YES
OK
A
3-22
NO
Replace R53E,R53C,R53B.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
A
YES
Check
IC601(TAS5548)
input data
Pin24
PWM wave.
NO
Check
CD Assy communication
Pin22, 23, 24.
NO
Refer to
CD troubleshooting.
NO
Check each line
resistor output.
YES
YES
Check
IC601 input
data.
YES
OK
Check PWM
modulator output
FL: Pin48(-),49(+)
FR: Pin46(-),47(+).
Other output
check.
NO
NO
Check IC601.
YES
YES
OK
OK
3-23
Replace IC601.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
6. POWER AMP PART CHECK
POWER AMP PART CHECK
YES
Check
CN501 Pin10: +12 V
Pin1,2,3: 37 V.
NO
Refer to SMPS troubleshooting.
YES
Check IC701, IC702
Pin29, 30, 31, 36, 37, 38 input voltage.
YES
Check IC701, IC702
Pin2: +12 V input.
NO
Check each line resistor output voltage.
YES
Check PWM Modulator input
IC701 Pin5, 6, 14, 15 / IC702 Pin5, 6.
YES
Check IC701, IC702
Pin27, 28, 32, 35, 39, 40.
YES
Check output
line coil.
NO
YES
OK
3-24
Replace the coil.
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
7. TUNER / AUX FUNCTION CHECK
FUNCTION CHECK
YES
Check IC201
(CS5346) Pin23, 24,
26, 27 input.
NO
Check JK200,TU500.
YES
Check IC201
(CS5346) Pin41 output
data.
NO
NO
Check CN501 Pin7,8: +5.6 V.
YES
YES
Check
IC501(MLC3730)
input data.
Check IC201
Pin5: +3.3 V
Pin14: +5 V.
NO
Check IC201
Pin5: +3.3 V,
Pin6: High,
Pin14: +5 V.
NO
Check IC201
Pin41: SDOUT,
Pin42: SLCK,
Pin43: LRCK,
Pin44: MCLK.
YES
YES
IC501(MLC3730)
output data.
Replace IC201.
YES
OK
3-25
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
8. TUNER FUNCTION CHECK
TUNER FUNCTION CHECK
YES
Check tuner
module(TU500)
operation.
NO
Check tuner module voltage
(Pin4: +3.3 V).
YES
Check IC501 Pin P8, P10, P11, T15.
NO
YES
Refer to function check.
3-26
Check tuner module data.
CDP ELECTRICAL TROUBLESHOOTIHG GUIDE
1. CD FUNCTION
CD FUNCTION
YES
Can the
disc insert?
NO
YES
Is load +,- ok?
NO
Is Motor_open/close
OK? (IC408 Pin6,7)
YES
YES
Check IC408.
Is Motor ok?
(about 12 Ω)
Disc reading
is ok?
NO
Check loading motor.
NO IM driving (Focus and NO
tracking) is ok?
Focus/
tracking/sled signal
is ok?
Is the MD(CN404
Pin22) about 190 mV?
Is no signal at spk?
YES
NO
Check Vcc of IC407.
YES
Check
the signal (16.0344 MHz)
at IC407
Pin51.
NO
Check Cristal (X400).
NO
YES
Check IC501
input/output and
control line.
Check IC408
(Motor drive IC).
NO
Check IM
(pick-up).
YES
YES
Check
the signal of
IC407 Pin52,53,54.
NO
NO
Replace IC501.
YES
Refer to function
check.
3-27
Replace Cristal
(X400).
CDP ELECTRICAL TROUBLESHOOTIHG GUIDE
2. DOUBLE USB FUNCTION
USB FUNCTION
YES
Plug-in usb device.
YES
Display “NO USB”.
NO
Check USB_5V.
NO
Check CN302.
YES
YES
Display “READ”.
Check USB_D+/D(R380,R381/
R382,R383).
NO
Check USB jack (JK301/ JK302).
YES
YES
Display “NO FILE”.
Check IC501
(Pin U7,U8/ A7,A8).
YES
Check usb audio file in usb device
(MP3, WMA file is playable)
3-28
NO
Replace IC501.
WAVEFORMS OF MAJOR CHECK POINT
1. SDRAM
CLK
1
DATA
IC502 PIN38
IC502 PIN53
2
ADDRESS
IC502 PIN35
3
CS
IC503 PIN1
4
2. SERVO
5
CD-16M
IC501 PIN M1
3-29
3. AUDIO PATH
CD_BCK
IC501 PIN N4
6
CD_LRCK
IC501 PIN N1
7
CD_DATA
8
IC501 PIN N2
DAC_MCLK
9
IC501 PIN D2
DAC_BCK
10
IC501 PIN E1
DAC_LRCK
11
DAC_DATA
12
3-30
IC501 PIN D1
IC501 PIN E2
4. USB
USB_5V
13
D+
IC501 PIN A8
D-
IC501 PIN A7
14
3-31
MEMO
3-32
WIRING DIAGRAM
1. [Total CNT : 6ea]
SPK TERMINAL
Power
cord
TUNER
MODULE
AUX
JACK
1 CD MD
15P
10P
1. FFC Cable
ྙ MAIN ↔ FRONT: 1EA
ྚ MAIN ↔ MD: 2EA
ྛ MAIN ↔ BT module: 1EA
23P
YUGoG z
ྙ SMPS ↔ MAIN : 1EA
ĸ MAIN ↔ USB: 1EA
MAIN + CD
SMPS
8P
19P
BT
USBஂ2EAஃ+ FRONT
3-33
: Harness
: FFC
3-34
BLOCK DIAGRAMS
1. SYSTEM BLOCK DIAGRAM
TUNER_L/R
TUNER
A
PWM_RST
TUNER_RST/CE/DAT/CLK
PWM DAT/CLK
REMOCON/KEY
PWM_MUTE
IC301
ABOV
VFD
VFD_STB/CLK/DO
IC701
AMP IC
TAS5612LA
FR ·
IC601
TAS5548
PWM
IC702
AMP IC
TAS5612LA
SW
DAC_BCK/LRCK/D ATA
FL
FR
SW
AMP_PDN
IM(CMS-S79RFVC6)
OP_SW,CL_SW
AMP_OTW/SD/CLIP /AMP PROTECT
DSP IC501
P/UP
m·V{y·
SLEDs
SPINs
M
FL·
LOADs
IC408
AM5890
Mo to r
Drive
MOT_MUTE/CLOSE/OPEN
CP_RESET/SCL/SDA
IC511
IPOD 2.0C
MLC3730
176PIN BGA
RX/TX/RTS/CTS/RS T/S DA/S CL
BT 4.0(New)
SPDO/SLDO/FOD/TRD
LD/VREF
A,B,C,D,E,F/ PD
IC407
LC78615E
(New)
CD_16M
CD_MCK/RW/DIN_ OUT/BU SY
USB1_Ds
CD_RESB
USB2_Ds
CD_BCK/CD_LRCK/CD_D ATA
DRM_SEL/DRM_CKE/DRM_RAS
DRM_CLK/DRM_CAS/DRM_WE N
TUNER
A
AUX
D0~D15/A0~A11/A13~A16
ADC_RST/CLK/DAT
TUNER_L/R
AUX_L/R
SF_DI/DO
IC201
CS5346
IC502 SDRAM
M12L64164A
IC503 FLASH
W25Q80BVSSIG
SF_CS/CLK(SPI)
1MB/4MB
ADC_DATA
PTB_L/R
SCL/SDA
DAC_BCK/DAC_LRCK/D AC_M CLK
Po rtable
8MB
PTB_SENSE
3-35
3-36
IC504
EEPROM
2. SMPS BLOCK DIAGRAM
م
م
ࣧ
FL+
Snubber
Block
FLVkk
م
T
R
A
N
S
م
Main
SMPS IC
Block
م
CN901
12V LDO
12V
On/Off
5.6VA
م
م
Noise
Filter
Block
(X-cap
Line Filter)
Y-Cap
Feedback
Photo coupler
Y-Cap
م
F
U
S
E
Snubber
Block
T
R
A
N
S
م
م
Photo coupler
On/Off
AMP
SMPS IC
With FET
Block
م
Feedback
Photo coupler
3-37
3-38
م
م
P.CTL
PVDD
3. AUDIO PATH BLOCK DIAGRAM
FR,FL
TAS5624A
Woofer
TAS5624A
12.288MHZ
255Wx2
PORTABLE
PORTABLE
DAC_LRCK
DAC_BCK
Aux in
TUNER
ADC
CS5346
(SLAVE)
DAC_MCLK
DAC_LRCK
DAC_BCK
AUX
DAC_DATA
Tuner
ADC_DATA
CD_BCK
RF
LC78615E
MLC3730
(176 PIN)
CD_LRCK
CD_DATA
24MHZ
3-39
32.768KHZ
3-40
DSP
Block
PWM
TAS5548
250Wx1
AMP Block
4. POWER DIAGRAM
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CIRCUIT DIAGRAMS
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
1. SMPS CIRCUIT DIAGRAM
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.
12
11
10
9
8
7
6
5
4
3
CAUTION:
Danger if fuse is incorrectly replaced.
Replace only with the type identical to fuse rating
and(or) model name described in main label.
2
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
1
A
B
C
D
SMPS
EAX65422801_0.1.0_SMPS
2013. 12. 27
E
F
G
H
I
3-43
J
K
L
3-44
M
N
O
P
Q
R
S
T
2. MAIN - DSP CIRCUIT DIAGRAM
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3-49
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3-52
M
N
O
P
AMP
EAX65586301_0.1.0_MAIN(#4)
2013. 12. 27
Q
R
S
T
6. FRONT CIRCUIT DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
FRONT
EAX65586201_0.1.0_FRONT
2013. 12. 27
A
B
C
D
E
F
G
H
I
3-53
J
K
L
3-54
M
N
O
P
Q
R
S
T
CIRCUIT VOLTAGE CHART
1. ICs
Location Pin No.
SPEC
EE Mode (V)
Margin
Playback Mode (V)
Margin
Location Pin No.
SPEC
8(VDD)
2.7~3.6
3.24
8(VCC)
1.8~5.5
3.24
MAIN Board
Margin
Playback Mode (V)
Margin
3.24
-
3.24
-
3.6
-
3.16
-
IC503 Flash (W25Q64FVSSIG)
IC201 ADC(CS5346)
5(VLC)
3.13~5.25
3.24
0.11
3.24
0.11
14(VA)
4.75~5.25
5.08
0.17
5.08
0.17
36(VLS)
3.13~5.25
3.24
0.11
3.24
0.11
46(VD)
3.13~3.47
3.24
0.11
3.24
0.11
2(VIN)
2.25~16
5.68
3.43
5.67
3.42
-
5.08
-
5.08
-
18(AVDD)
3.0~3.6
3.24
0.24
IC407 SERVER (LC78615E)
1(VCC)
<18
1(VCC)
<18
3.6
-
3(VIN)
2.5~6
4.91
-
4.88
-
-
3.25
-
3.25
-
3.0~3.6
3.24
0.24
3.24
0.24
3.0~3.6
3.24
0.24
3.24
0.24
2(OUTPUT)
1.176~1.224
59(DVDD)
3.0~3.6
3.24
0.24
3.24
0.24
3(INPUT)
<15
63(XVDD)
3.0~3.6
3.24
0.24
3.24
0.24
8(VCC1)
4.3~13.2
5.08
-
5.08
-
19(VCC2)
4.3~Vcc1
5.08
-
5.07
-
A4 (VDD33ADC)
3.0~3.6
3.24
3.24
-
IC501 MPEG(MLC3730)
B7 (VDDUSB11)
3.0~3.6
3.24
-
3.24
-
A9 (VDD12CORE)
1.08~1.32
1.18
-
1.18
-
-
6(VOUT)
33(DVDD)
IC408 MOTOR(AM5890)
3.15
IC507 LDO (TJ4220GDP-ADJ)
28(VVDD1)
-
-
IC505 P-SENSE(AZ7027RTRE1)
IC506 RESET(AZ7027RTRE1)
3(VOUT)
0.24
-
IC504 EEPROM(M24C16)
IC202 LDO (LM37102D-ADJ)
3.24
EE Mode (V)
IC508 LDO (AZ1117BH-1.2TRE1)
1.19
-
1.19
-
3.24
-
3.24
-
IC509 LDO (AZ1117BH-1.2TRE1)
2(OUTPUT)
1.176~1.224
3(INPUT)
<15
1.19
-
1.19
-
3.24
-
3.24
-
IC510 LDO (AZ1117BH-ADJ)
2(OUTPUT)
<15
5.67
-
5.66
-
3(INPUT)
<15
4.02
-
4.02
-
8(VCC)
1.6~5.5
3.24
-
IC511 IPOD(MFI337S3959)
3.24
A10 (VDD33IO)
3.0~3.6
3.24
-
3.24
-
E9 (VDD12CORE)
1.08~1.32
1.18
-
1.18
-
9(AVDD)
2.97~3.63
IC601 PWM (TAS5548DGG)
3.25
-
3.24
-
D14 (VDD33IO)
3.0~3.6
3.24
-
3.24
-
14(DVDD2_CORE)
2.97~3.63
3.24
-
3.23
-
J14 (VDD12CORE)
1.08~1.32
1.18
-
1.18
-
35(DVDD1_CORE)
2.97~3.63
3.24
-
3.23
-
P14 (VDD33IO)
3.0~3.6
3.24
-
3.24
-
50(AVDD_PWM)
2.97~3.63
3.24
-
3.23
-
T16(VDD30RTC)
2.75~3.3
3.15
-
3.16
-
T10 (VDD12ALIVE)
1.08~1.32
1.18
-
1.18
-
1(GVDD_AB)
10.8~13.2
11.96
11.96
-
IC701 AMP(TAS5624A)
-
U9 (VDD33OSC)
3.0~3.6
3.24
-
3.24
-
2(VDD)
10.8~13.2
12.12
-
12.12
-
P9 (VDD12USB20)
1.08~1.32
1.19
-
1.19
-
22(GVDD_CD)
10.8~13.2
11.96
-
11.96
-
U6 (VDD33USB20)
3.0~3.6
3.24
-
3.24
-
29,30,31(PVDD_CD)
12~34
37.5
-
37.5
-
U5 (VDD33USB20)
3.0~3.6
3.24
-
3.24
-
36,37,38(PVDD_AB)
12~34
37.5
-
37.5
-
U4 (VDD12CORE)
1.08~1.32
1.18
-
1.18
-
FRONT Board
P4 (VDD33IO)
3.0~3.6
3.24
-
3.24
-
IC301 VFD (MC3401L)
J4 (VDD12INT)
1.08~1.32
1.18
-
1.18
-
13(VDD)
3.0~5.5
3.24
-1.26
3.24
-1.26
D4 (VDD33IO)
3.0~3.6
3.24
-
3.24
-
43(VDD)
3.0~5.5
3.24
-1.26
3.24
-1.26
30(VEE)
VDD-35
-22.4
-9.36
-22.5
-9.26
1(VDD)
3.0~3.6
3.24
-
3.24
-
3(VDDQ)
3.0~3.6
3.24
-
3.24
-
2(VIN)
2.25~16
5.69
3.44
5.68
3.43
3(VOUT)
-
5.05
-
5.05
-
IC502 SDRAM (W9812G6JH-6)
9(VDDQ)
3.0~3.6
3.24
-
3.24
-
14(VDD)
3.0~3.6
3.24
-
3.24
-
27(VDD)
3.0~3.6
3.24
-
3.24
-
43(VDDQ)
3.0~3.6
3.24
-
3.24
-
49(VDDQ)
3.0~3.6
3.24
-
3.24
-
3-55
IC302 LDO (LM37102D)
3-56
MEMO
2. CAPACITORS
Loca. No.
Value
Capacitor
(uF)
EEMode
Voltage_
Spec
Positive
(+)
Negative
(-)
Gap
Play back
Margin
Positive
(+)
Negative
(-)
Gap
Margin
MAIN Board
C244
47uF
16V
5.08V
0V
5.08V
10.92V
5.08V
0V
5.08V
10.92V
C402
100uF
16V
5.08V
0V
5.08V
10.92V
5.08V
0V
5.08V
10.92V
C404
47uF
16V
3.24V
0V
3.24V
12.76V
3.23V
0V
3.23V
12.77V
C429
220uF
10V
5.08V
0V
5.08V
4.92V
5.07V
0V
5.07V
4.93V
C479
220uF
10V
1.68V
0V
1.68V
8.32V
1.68V
0V
1.68V
8.32V
C481
47uF
16V
3.24V
0V
3.24V
12.76V
3.23V
0V
3.23V
12.77V
C501
1000uF
6.3V
3.16V
0V
3.16V
3.14V
3.16V
0V
3.16V
3.14V
C526
47uF
16V
1.19V
0V
1.19V
14.81V
1.19V
0V
1.19V
14.81V
C541
47uF
16V
1.19V
0V
1.19V
14.81V
1.19V
0V
1.19V
14.81V
C579
10uF
16V
3.24V
0V
3.24V
12.76V
3.24V
0V
3.24V
12.76V
C618
100uF
16V
3.25V
0V
3.25V
12.75V
3.25V
0V
3.25V
12.75V
C624
100uF
16V
12.12V
0V
12.12V
3.88V
12.12V
0V
12.12V
3.88V
C643
100uF
16V
5.08V
0V
5.08V
10.92V
5.08V
0V
5.08V
10.92V
C724
470uF
50V
37.5V
0V
37.5V
12.5V
37.5V
0V
37.5V
12.5V
C727
470uF
50V
37.5V
0V
37.5V
12.5V
37.5V
0V
37.5V
12.5V
C737
470uF
50V
37.5V
0V
37.5V
12.5V
37.5V
0V
37.5V
12.5V
FRONT Board
C310
220uF
10V
3.24V
0V
3.24V
6.76V
3.24V
0V
3.24V
6.76V
C316
100uF
16V
3.16V
0V
3.16V
12.84V
3.14V
0V
3.14V
12.86V
C377
47uF
50V
-18.1V
0V
-18.1V
68.1V
-18.2V
0V
-18.2V
68.2V
Location No.
SPEC
Test (V)
SMPS Board
C904
180uF/450V
315
C909
22uF/50V
14.7
C911
47uF/50V
18
C914
10uF/50V
17.4
C931
220uF/16V
2.9
C932
47uF/50V
22.9
C933/C934
1000uF/16V
5.5
C935/C936
100uF/50V
13.5
C954/C955
2200uF/50V
37.4
3-57
3-58
PRINTED CIRCUIT BOARD DIAGRAMS
1. SMPS P.C.BOARD
(TOP VIEW)
(BOTTOM VIEW)
3-59
3-60
NOTE) Warning
Parts that are critical with respect to risk
of fire or electrical shock.
2. MAIN P.C.BOARD
(TOP VIEW)
(BOTTOM VIEW)
3-61
3-62
3. FRONT P.C.BOARD
(TOP VIEW)
(BOTTOM VIEW)
3-63
3-64
