LG HT303SD User Manual

MODEL : HT303SD(SH32SD-S/SH32SD-W)
SERVICE MANUAL
DVD/CD RECEIVER
SERVICE MANUAL
MODEL : HT303SD(SH32SD-S/SH32SD-W)
http://biz.lgservice.com
P/NO : AFN31640743
JANUARY, 2007
1-1
[CONTENTS]
SECTION 1. GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SERVICE INFORMATION FOR EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
SECTION 2. AUDIO PART
AUDIO TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
SECTION 3. DVD & AMP PART
ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
DVD & AMP CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
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.
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.
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.
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.
Storage in conductive bag
Drop impact
NEVER look directly at the laser beam, and dont allow contact with fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure
SECTION 1. GENERAL
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 (1M Ω)
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.
Resistor (1 Mohm)
Conductive Sheet
Resistor (1 Mohm)
Armband
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 VOLTAGETHAT 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
SERVICE INFORMATION FOR EEPROM (DVD PART)
POWER ON
DVD LOGO Status (NO Disk status)
Remote control Pause key-->1-->4-->7-->2 in order.
Press number 0~9, Press charater A~F (1~6 for a while)
Use arrow key ( ) to move to appropriate position and make changes
Press pause key once
Change will be applied when power
OFF-->ON.
NAME
OPT 1 OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 OPT 7 OPT 8 OPT 9 OPT A OPT B OPT C OPT D OPT E OPT F OPT G
HEX
48 55 23 FF 22 05 FC 31 4D 00 00 00 00 00 00 00
DETECT NEW EEPROM (OPTION EDIT SCREEN)
1-6
SERVICE INFORMATION FOR EEPROM (AMP PART)
POWER ON
FLD no disc status
Remote control ‘2’ + Front ‘STOP push same timing during 5s
FLD OP-0….
Use arrow key ( ) move to appropriate position and make changes
Press ENTER key once
FLD write okor ‘up ok’
Remote control ‘2’ + Front ‘STOP
push same timing
FLD display E2P CLR or EP CLR
Auto power off
NAME HEX
OPT 1 86 OPT 2 C2 OPT 3 10 OPT 4 00 OPT 5 00
DETECT NEW EEPROM (OPTION EDIT SCREEN)
1-7
SPECIFICATIONS
GENERAL
Power supply Refer to main label Power consumption Refer to main label Net Weight 2.4 kg External dimensions (W x H x D) 360 x 63 x 307 mm Operating conditions Temperature: 5°C to 35°C, Operation status: Horizontal Operating humidity 5% to 85%
CD/DVD
Laser Semiconductor laser, wavelength 650 nm Signal system PAL 625/50, NTSC 525/60 Frequency response (audio) 160 Hz to 18 kHz Signal-to-noise ratio (audio) More than 75 dB (1 kHz, NOP -6 dB, 20 kHz LPF/A-Filter) Dynamic range (audio) More than 70 dB Harmonic distortion (audio) 0.5 % (1 kHz, at 1W position) (20 kHz LPF)
VIDEO
Video output 1.0 V (p-p), 75 , negative sync./ SCART (TO TV) COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 ohms, negative sync, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 ohms, RCA jack x 1
TUNER FM
Tuning Range 87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHz Intermediate Frequency 10.7 MHz Signal-to Noise Ratio 60 dB (Mono) Frequency Response 160 - 8,000 Hz
AM [MW]
Tuning Range 522 - 1,620 kHz or 520 - 1,720 kHz Intermediate Frequency 450 kHz
AMPLIFIER
Stereo mode 45W + 45W (Rated Output Power 30W, 4at 1 kHz, THD 10 %) Surround mode Front: 45W + 45W (Rated Output Power 30W, THD 10 %)
Centre*: 45W Surround*: 45W + 45W (Rated Output Power 30W, 4at 1 kHz, THD 10 %) Subwoofer*: 75W (Rated Output Power 60W, 8at 30 Hz, THD 10 %)
Inputs AUX IN, MIC
SPEAKERS
Front/Center/Rear Speaker Passive Subwoofer
(SH32SD-S) (SH32SD-W) Type 1 Way1 Speaker 1 Way1 Speaker Impedance 4 8 Frequency Response 160 - 20,000 Hz 65 - 1,500 Hz Sound Pressure Level 84 dB/W (1m) 87 dB/W (1m) Rated Input Power 45 W 75 W Max. Input Power 90 W 150 W Net Dimensions (W x H x D) 98 x 101 x 105 mm 181 x 351 x 278 mm Net Weight 0.52kg 3.4kg
(* Depending on the sound mode
settings and the source, there may be no sound output.)
2-1
SECTION 2. AUDIO PART
AUDIO TROUBLESHOOTING GUIDE
1. Power Supply Circuit
Insert power cord.
Check power plug and power
supply circuit.
Turn power on.
OK
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Does red power led
turn on?
Check power supply circuit.
Is power on?
Check tracking servo circuit.
Does it play?
Check audio circuit.
Does it output
audio?
Check laser circuit.
Check focus circuit.
Check disc.
Does red power led
turn on?
2-2
2. Front circuit (1/2)
Power on.
Reconnect it.(Refer to notice *1)
Refer to SMPS part.
Check pattern and resoldering
Front B/D ok.
Red LED turn off?
Check if
PN1301 is ok?
Is the Digitron on
correctly?
Check if the front
power is ok?(*2)
Check if all
buttons are ok?
Check if the remote
control is ok?
Check if
RM301 is ok?
Yes Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
1
2
NO
2-3
3. Front circuit (2/2)
Refer to
MICOM circuit.
Check if the
power part of the
front is ok?
Check if
R345~R350
ok?
Refer to power(SMPS).
No
Replace R345 ~ R350.
No
Yes
Yes
1
Resolder or
Replace RM301.
Check if the power
part of the front is ok?
Check if the remote
control waveform of PN3101
pin11 is ok?
Check if RM301
voltage is ok(5V)?
Refer to power(SMPS).
No
Check RM circuit
Refer to MICOM circuit.
Yes
No
Yes
No
Yes
2
2-4 2-5
WIRING DIAGRAM
061026
2-6 2-7
BLOCK DIAGRAM
061026
061026
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR­CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORA TION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
CUIT.
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 UNTILTHE 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.
NOTE) Warning
NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock.
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
2-8 2-9
CIRCUIT DIAGRAMS
1. SMPS(POWER) CIRCUIT DIAGRAM
2-10 2-11
2. µ-COM(MAIN) CIRCUIT DIAGRAM
061026
2-12 2-13
3. MOTOR & SERVO CIRCUIT DIAGRAM
061026
2-14 2-15
4. I/O CIRCUIT DIAGRAM
061026
2-16 2-17
5. MIC CIRCUIT DIAGRAM
061026
2-18 2-19
6. FRONT JACK CIRCUIT DIAGRAM
061026
2-20 2-21
7. FRONT CIRCUIT DIAGRAM(WITH RDS)
061026
2-22 2-23
8. FRONT CIRCUIT DIAGRAM(WITHOUT RDS)
061026
2-24 2-25
PRINTED CIRCUIT BOARD DIAGRAMS
1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW )
2-26 2-27
2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW )
2-28 2-29
3. SMPS P.C. BOARD
NOTE:Warning
Parts that are shaded are critical with respect to risk of fire or electrical shock.
2-30 2-31
4. FRONT JACK P.C BOARD
5. FRONT P.C. BOARD(WITH RDS)
6. FRONT P.C. BOARD(WITHOUT RDS)
3-1
ELECTRICAL TROUBLESHOOTING GUIDE
1. System operation flow
SECTION 3. DVD & AMP PART
1. Initializes SERVO, DSP & RISC registers.
2. Write RISC code to SDRAM.
3. Reset RISC.
Show LOGO.
Yes
Yes
YesNo
No
No
No
Tray close to closed position.
SLED moves to inner position.
1. Judge whether have disc and disc type.
2. Jump to related disc reading procedure.
1. Execute Pressed Key & IR Key.
2. System operation routine loop.
1. Stop Playback & Open Tray.
2. Display tray open message & LOGO.
POWER ON.
Tray closed?
SLED at inner
side?
Recieve
OPEN/ CLOSE
Key?
Receive
CLOSE Key?
3-2
2. Test & debug flow
Yes
Yes
Yes
Yes
No
Switch on the Power PCBA.
Replace FLASH.
Check the POWER PART.
No
Check the POWER PART.
No
Check the regulators or diode.
No
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD, RWR.
4. Check FLASH Memory related circuit.
Check the
AC voltage
Power PCBA (110V
or 220V).
Update FLASH
successfully?
Are 3.5V and 5V DC
outputs normal on main
PCBA?
Are the
DC Voltage
outputs OK? (12V, 5.6V,
3.5V, 5V,7V, 34V).
TEST.
A
3-3
A
Power On.
Check AV cable
connection to TV set.
Check connection lines between FLASH & ES8380 and the FLASH access time whether is suitable or not.
Check connection lines between SDRAM(IC502) & ES8380 and the SDRAM is damaged.
Check the related circuit of ES8380 IC501 Pins133, 134, 137, 138, 139, 140.
Check the load OPEN & CLOSE switch.
Check the Tray control IO pins on ES8380.
Check the Tray control MOTOR & SERVO circuit IC401.
Show LOGO?
Does
Tray move inside
when it is not at
closed position?
Flash
Memory operates
properly?
SDRAM
works properly?
ES8380
VIDEO outputs
properly?
Check AV cable connection between main PCBA and loader. (MECHA)
Normal
OPEN_SW,
CLOSE_SW
signal?
Normal
IN_SW & OUT_SW
signal?
Normal
LOAD+ & LOAD-
signal?
B
3-4
B
Do not put in disc and close tray.
Does the SLED
move to inner side when it is
at outer position?
Optical Lens
has movements for
searching Focus?
C
Check the cable connection with MECHA.
Check the connection line of DRV_MUTE.
Check the related circuit of SLEGN.
Check the amp circuit on motor driver.
Motor
Driver DRV_MUTE
pin is high?
Motor
Driver DRV_MUTE
pin is High?
SLED+ and
SLED- output
properly?
Check cable connection with pick-up head.
Check Focus connection on ES8381 and motor driver.
Check the amp circuit on motor driver.
Proper Focus outputs
to motor dricer?
Proper F+ & F- outputs?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
NoNo
3-5
C
Laser turns on when
reading disc?
Put disc in?
D
Check the laser power circuit on ES8380 and connecting to power transistor.(Q405, Q406).
Check the related circuit on laser power transistor.
Check the related circuit on ES8380 RF signal.
Check the SPINDLE related circuit on ES8380.
Check the spindle control amp circuit of motor driver.
Laser off.
Check the RF connection between IP9009 and ES8380.
Check the cable connection between spindle and main PCB.
Check cable connection between transistor output and pick-up head.
DVDLD or
CDLD output
property?
Disc ID is correct?
Does spindle rotate?
Collector voltage of power transistor is OK?
(Q405, Q406)
Proper
RF signal on ES8380.
Proper
SPINDLE signal on
ES8380.
SPNP
SPNN output
properly?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No No
No
No
No
No
No
No
No
3-6
D
Focus on ok?
E
Check connections between ES8380 and pick-up head.
Check the related circuit on ES8380 CD-DVDCT.
Check the TRACK connection on ES8380 and motor driver.
Check the tracking control amp circuit on motor driver.
Check the related circuit on ES8380.
Check cable connection on pick-up head.
Check RF signal waveform.
Check CD_DVDCT connection between IP9009 and ES8380.
Proper
signals on A, B, C,
D of ES8380.
Track On OK?
Disc Playback?
Proper
CD-DVDCT signal
on ES8380.
Proper
TRACK signal
on ES8380.
TR+ & TR-
output properly?
Proper
CD-DVDCT signal
on ES8380.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No No
No
No
No
No
No
3-7
E
Normal Audio
output when disc
playback?
Check connection between IC701 BCK, LRCK, ADATAO.
Check the related circuit of PWM.(Check Audio out Pins 54, 55, 58, 59, 61, 62, 67, 68, 70, 71, 74, 75.
Check Digital Amp circuit (IC702, IC703).
PWM IC
received correct data
stream?
Normal
PWM IC out?(IC701).
TEST END.
3-8
3. AUDIO µ-COM Circuit(DVD & AMP)
YES
Does CD/DVD appear at FLD?
Does AUX, SCART, OPT and FM 87.5 appear at FLD.
OK
Does Loading appear at FLD?
POWER ON.
YES NO
YES
Does no Disc or Time appear at FLD?
NO YES
NO
NO
NO
NO
NO
NO
Does it appear DVD Error at FLD?
Refer to SMPS.
Refer to oscillator circuit.
Check IC101 reset waveform.
Check 3.3V line.
Check power section circuit.
NO
Check power part of Main B/D.
Check oscillator of X101.
Check if IC101 Pin41 is high.
Check if IC101 Pin15, 16, 47 are high(5V).
Check if IC101 Pin1 is high.
Replace IC101.
NO
NO
Check if DVD an audio micom insert is OK.
Check Power.
YES
Check DVD Module.
YES
Check SMPS.
YES
YES
YES
YES
YES
YES
YES
3-9
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL
1) ES8380 main clock is at 27MHz(X501)
3.8V, 27MHz
FIG 1-1
2) ES8380 reset is high active.
PWR_CTL(SYSTEM µ-COM) (IC101 PIN2)
5.2VA
Power Cord in
DVD_RESET(IC101 PIN 41)
MRST#(IC501 PIN 203)
FIG 1-2
3-10
2. SDRAM CLOCK
1) ES8380 main clock is at 27MHz(X501)
(IC502 PIN 38)
DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V
FIG 2-1
3) Flash R/W enable signal during download(Downloading)
FRD(IC503 PIN 28)
FWR(IC503 PIN 11)
FIG 1-4
3-11
3. TRAY OPEN/CLOSE SIGNAL
1) Tray open/close waveform
OPENSW(P401 PIN3)
CLOSESW(P401 PIN4)
OPEN(IC401 PIN 1)
CLOSE(IC401 PIN 2)
FIG 3-1
2) Tray close waveform
OPENSW(P401 PIN3)
CLOSESW(P401 PIN4)
OPEN(IC401 PIN 1)
CLOSE(IC401 PIN 2)
FIG 3-2
3-12
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
SLO(2.0V/1.4V/1.0V) (IC501 PIN 173)
DRV_MUTE(5V) – (IC401 PIN 21)
SLED+(4.7V/3.6V/1.9V) (IC401 PIN 17)
SLED-(5.3V/3.7V/2.5V) (IC401 PIN 18)
FIG 4-1
3) Tray open waveform
OPENSW(P401 PIN3)
CLOSESW(P401 PIN4)
OPEN(IC401 PIN 1)
CLOSE(IC401 PIN 2)
FIG 3-3
3-13
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
FOO(1.5V/1.4V/1.3V) (IC501 PIN 172)
F+(4.0V/3.6V/3.2V) (IC401 PIN 13)
F-(4.0V/3.6V/3.2V) (IC401 PIN 14)
FIG 5-1
6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)
DVD MDI(0V/180mV) (IC501 PIN 152)
DVDLDO501(5.0V//3.5V) (IC501 PIN 149)
CDLDO(5.0V/3.6V) (IC501 PIN 150)
FIG 6-1
3-14
F+(IC401 PIN 13)
CD_DVDCT(IC501 PIN 133)
RF(IC501 PIN 160)
FIG 7-2 (DVD)
7. DISC TYPE JUDGEMENT WAVEFORMS
F+(IC401 PIN 13)
CD_DVDCT(IC501 PIN 133)
RF(IC501 PIN 160)
FIG 7-1 (DVD)
3-15
F+(IC401 PIN 13)
CD_DVDCT(IC501 PIN 133)
RF(IC501 PIN 160)
FIG 7-3 (CD)
F+(IC401 PIN 13)
CD_DVDCT(IC501 PIN 133)
RF(IC501 PIN 160)
FIG 7-4 (CD)
3-16
CD_DVDCT(IC501 PIN 133)
FOO(IC501 PIN172)
F+(IC401 PIN 13)
F-(IC401 PIN 14)
FIG 8-2 (CD)
8. FOCUS ON WAVEFORMS
CD_DVDCT(IC501 PIN 133)
FOO(IC501 PIN172)
F+(IC401 PIN 13)
F-(IC401 PIN 14)
FIG 8-1 (DVD)
3-17
9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION)
SPINO(1.4V/1.8V) (IC501 PIN 171)
SP-(3.6V/2.4V) (IC501 PIN 156)
SP+(3.6V/4.8V) (IC501 PIN 155)
FIG 9-1
10. TRACKING CONTROL RELATED SIGNAL(System checking)
CD_DVDCT(IC501 PIN 133)
TRO(IC501 PIN 174)
TR-(IC401 PIN 12)
TR+(IC401 PIN 11)
FIG 10-1(DVD)
3-18
CD_DVDCT(IC501 PIN 133)
TRO(IC501 PIN 174)
TR-(IC401 PIN 12)
TR+(IC401 PIN 11)
FIG 10-2(CD)
11. ES8380 VIDEO OUTPUT WAVEFORMS
1) Full colorbar signal(COMPOSIT)
(IC501 PIN 110)
FIG 11-1
3-19
2) Y
(IC501 PIN 113)
FIG 11-2
1) Audio L/R
FIG 12-1
12. AUDIO OUTPUT FROM PWM IC
(IC701 PIN 1, 7)
3-20
BCK(IC501 PIN 124)
LRCK(IC501 PIN 117)
ASDATA3
2) Audio related Signal
ADATA0(IC501 PIN 118)
FIG 12-2
3-21
1)
R620 → TP611 or R621 TP612
2)
R618 → TP609 or R619 TP610
3)
R612 → TP603 or R613 TP604
4)
R610 → TP601 or R611 TP602
5)
R614 → TP605 or R615 TP606
6)
R616 → TP607 or R617 TP608
13. DVD & AMP WAVEFORMS
061026
3-23 3-24
DVD & AMP CIRCUIT DIAGRAM
1. MPEG CIRCUIT DIAGRAM
061026
3-25 3-26
2. DSP & AMP CIRCUIT DIAGRAM
4-1 4-2
• CABINET AND MAIN FRAME SECTION
SECTION 4. EXPLODED VIEWS
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
275
465
D
A50
A43
273
P3502
280
283
273
A26
CABLE1
463
C
462
A
B
463
D
A
B
463
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.
250
MAIN
C
279
A44
261
465
260
SMP
463
A46
S
A47
473
300
4-3 4-4
DECK MECHANISM EXPLODED VIEW(DP-10T)
026
001
002
003
A01
020
018
014
013
017
435
012
A26
019
012
440
015B
015A
015
016
A02
439
012A
012A
010
432
030
025
024
439
431
435
430
021
036
A03
4-5
• PACKING ACCESSORY SECTION
808
BATTERY
900
REMOCON
803
PACKING, CASING
824
ANTENNA LOOP(AM)
825
ANTENNA (FM)
INSTRUCTION ASSEMBLY
801
PACKING, CASING
803
804
BAG
802
BOX
5-1
SECTION 5. SPEAKER SECTION
FRONT/CENTER/REAR SPEAKER (SH32SD-S)
852
853
850
851
WIRE84
WIRE83
WIRE82
WIRE81
WIRE80
A84
A83
A82
A81
A80
F.R SPK
F.R SPK F.L SPK CENTER SPK R.R SPK R.L SPK
F.L SPK
R.R SPK R.L SPK
CENTER SPK
A80SL
A80SR
A80C
A80FL
A80FR
F.R CASE Assembly F.L CASE Assembly
R.R Assembly R.L Assembly
CENTER Assembly
5-2
4. LHS-96SB
PASSIVE SUBWOOFER SPEAKER (SH32SD-W)
951
WIRE90
953
952
954
950
A90
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