HDD/J10- (J10HMANUALDSF/J10H-DVICE SA)EH-DR
J10 MODELS:
P/NO : AFN32759823 |
SEPTEMBER, 2007 |
Internal Use Only
Website http://biz.lgservice.com
2.1CH HOME THEATER SYSTEM
SERVICE MANUAL
MODELS: J10HD-D/J10HD
SPEAKERS: J10HD-SF/J10HD-SA
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
|
CONTENTS |
SECTION 1......... |
SUMMARY |
SECTION 2......... |
ELECTRICAL |
SECTION 3......... |
CABINET & MAIN CHASSIS |
SECTION 4......... |
REPLACEMENT PARTS LIST |
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Copyright © 2007 LG Electronics. Inc. All right reserved. |
LGE Internal Use Only |
Only for training and service purposes |
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SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR HOME THEATER SYSTEM PRODUCTS........ |
1-3 |
SERVICING PRECAUTIONS.................................................................................................................... |
1-4 |
• GENERAL SERVICING PRECAUTIONS |
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• INSULATION CHECKING PRODEDURE |
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• ELECTROSTATICALLY SENSITIVE (ES) DEVICES |
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SERVICE INFORMATION FOR EEPROM ........................................................................................... |
1-5 |
SPECIFICATIONS ........................................................................................................................................ |
1-6 |
LGE Internal Use Only |
1-2 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
PRODUCT SAFETY SERVICING GUIDELINES FOR HOME THEATER SYSTEM PRODUCTS
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service technicians.
When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter “x” included in their component designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Corporation.
Circuit diagrams 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.
CAUTION : Do not attempt to modify this product in any way. Never perform customized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.
Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature.
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice:
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the following:
FIRE AND SHOCK HAZARD
1.Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items trans-ported to and from the repair shop.
2.Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated.
3.Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign particles.
4.Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including theAC cord), and replace if necessary.
5.No lead or component should touch a high current device or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided.
6.After reassembly of the set, always perform an AC leakage test on all exposed metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150VAC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure theAC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse theAC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliampAC.Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
TIPS ON PROPER INSTALLATION
1.Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow.
2.Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc.
3.Avoid placement where draperies may obstruct venting.The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation.
4.Walland shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations.
5.Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured.
6.Aproduct on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets.
7.Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family.
Copyright © 2007 LG Electronics. Inc. All right reserved. |
1-3 |
LGE Internal Use Only |
Only for training and service purposes |
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SERVICING PRECAUTIONS
CAUTION: Before servicing the HOME THEATER SYSTEM covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publications, always follow the safety precautions.
Remember Safety First :
General Servicing Precautions
1.Always unplug the HOME THEATER SYSTEM AC power cord from the AC power source before:
(1)Removing or reinstalling any component, circuit board, module, or any other assembly.
(2)Disconnecting or reconnecting any internal electrical plug or other electrical connection.
(3)Connecting a test substitute in parallel with an electrolytic capacitor.
Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.
2.Do not spray chemicals on or near this HOME THEATER SYSTEM or any of its assemblies.
3.Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication of contacts is not required.
4.Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped.
5.Do not apply AC power to this HOME THEATER SYSTEM and / or any of its electrical assemblies unless all solidstate device heat sinks are correctly installed.
6.Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. Note 1 : Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES 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 ES 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 ES 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 ES devices.
5.Do not use freon-propelled chemicals. These can generate an electrical charge sufficient to damage ES devices.
6.Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil,or comparable conductive material).
7.Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.
Caution: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged replacement ES devices. (Normally 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 ES device.)
LGE Internal Use Only |
1-4 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
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Only for training and service purposes |
SERVICE INFORMATION FOR EEPROM
1. Press the CLEAR button on the remote control together with STOP button on the front panel about 6 sec.
The picture on OSD will be as bellow :
* Refer to page 4-1
OP1 : 00 |
00000000 |
MASK : 30 |
OP2 : 00 |
00000000 |
E : FF (OR) |
OP3 : 00 |
00000000 |
D39 |
OP4 : 00 |
00000000 |
|
OP5 : 00 |
00000000 |
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OP6 : 00 |
00000000 |
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OP7 : 00 |
00000000 |
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OP8 : 00 |
00000000 |
E X I T : |
OP9 : 00 |
00000000 |
MOVE : < > |
OPA : 00 |
00000000 |
E D I T |
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2.To MOVE from OP1 (Option 1) to another option, press button on the remote control.
3.To CHANGE the option code, press button on the remote control.
4.To APPLY the option code, after change the option press ENTER button on remote control.
5.OSD “Write OK”.
6.To INITIALIZE the system, press CLEAR button on the remote control together with STOP button on the front panel about 6 sec.
7.To exit from the option code menu without initialize the system, just turn off the power and then turn on again.
Copyright © 2007 LG Electronics. Inc. All right reserved. |
1-5 |
LGE Internal Use Only |
Only for training and service purposes |
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SPECIFICATIONS
• GENERAL
Dimensions (approx.) Mass (approx.) Operating temperature Operating humidity
Audio recording format
Sampling frequency Compression format Sampling bitrate
•RECORDING
Recordable media
•PLAYBACK
Frequency response
Signal-to-noise ratio
Harmonic distortion
Dynamic range
• INPUTS
Audio input (optical audio) VIDEO IN
AUDIO IN
• OUTPUTS
VIDEO OUT COMPONENT VIDEO OUT
HDMI video / audio output
•AMPLIFIER
Output power
•TUNER SPECIFICATIONS
Tuning Range (FM) Intermediate Frequency (FM) Signal-to-noise ratio
Tuning Range (AM) Intermediate Frequency (AM) Antenna
326 X 215 X 78mm (w x h x d) without foot 3.1kg
5°C to 35°C 5% to 90%
44.1kHz
MP3
128Kbps
HDD (80GB)
DVD (PCM 48kHz) : 20Hz to 20kHz, CD : 20Hz to 20kHz DVD (PCM 96kHz) : 20Hz to 44kHz
More than 85dB (SPEAKER OUT) Less than 0.007% (SPEAKER OUT) More than 85dB (SPEAKER OUT)
3V (p-p), 75Ω, Optical connector x 1 1.0Vp-p 75ohms, sync negative, SCART x 1
0dBm more than 47kohms, RCA jack (L, R) x 1 / SCART x 1
1Vp-p 75Ω, sync negative, RCA jack x 1 / SCART x 1
(Y) 1.0V (p-p), 75Ω, negative sync, RCA jack x 1 (Pb) / (Pr) 0.7V (p-p), 75Ω, RCA jack x 2
19pin (HDMI standard, Type A)
Front : 75W + 75W (4Ω at 1kHz, THD 10%)
Subwoofer : 150W (3Ω at 60Hz, THD 10%)
87.5 - 108MHz 10.7MHz 60dB(Mono) 522 - 1,611kHz 450kHz
Wire antenna (FM) Loop antenna (AM)
• SPEAKERS |
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Front (J10HD-SF) |
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Active Subwoofer (J10HD-SA) |
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Type : |
2 Way 3 Speaker |
Power requirements : |
AC 200 - 240V, 50/60Hz |
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Impedance : |
4Ω |
Power consumption : |
75W |
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Frequency Response : |
100 - 20,000Hz |
Type : |
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1 Way 1 Speaker |
Sound Pressure Level : |
82dB/W (1m) |
Impedance : |
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3Ω |
Max. Input Power : |
150W |
Frequency Response : |
65 - 1,500Hz |
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Net Dimensions (WxHxD) : 104 x 328 x 21mm |
Sound Pressure Level : |
80dB/W (1m) |
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Net Weight : |
2.9kg |
Max. Input Power : |
300W |
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Net Dimensions (WxHxD) : |
216x 328 x 317mm |
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Net Weight : |
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8.3kg |
LGE Internal Use Only |
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1-6 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
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Only for training and service purposes |
SECTION 2
ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE..... |
2-2 |
1. SMPS TROUBLESHOOTING FLOW ............ |
2-2 |
2. DC/DC TROUBLESHOOTING FLOW ........... |
2-5 |
3. AMP PROTECTION ....................................... |
2-8 |
WAVEFORMS..................................................... |
2-9 |
1. WHEN POWER ON, RESET (DVD & µ-COM) |
|
WAVEFORM .................................................. |
2-9 |
2.AT USB FUNCTION, DP, DM WAVEFORM...2-9
3.STARTING ACTION WAVEFORM IN
MD DEVICE ................................................. |
2-10 |
4. AT DVD FUNCTION..................................... |
2-10 |
5. AT POWER ON, SPINDLE SIGNAL |
|
AT MD DECK................................................ |
2-11 |
6. TRACKING SIGNAL..................................... |
2-11 |
7. DISK TYPE JUGEMENT WAVEFORM........ |
2-12 |
WIRING DIAGRAMS..................................... |
2-13 |
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1. |
ACTIVE SUBWOOFER WIRING DIAGRAM ...... |
2-13 |
2. MAIN SYSTEM WIRING DIAGRAM............ |
2-15 |
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BLOCK DIAGRAMS ..................................... |
2-17 |
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1. |
ACTIVE SUBWOOFER BLOCK DIAGRAM ....... |
2-17 |
2. MAIN SYSTEM BLOCK DIAGRAM ............. |
2-19 |
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3. DC/DC SMPS BLOCK DIAGRAM ............... |
2-21 |
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4. |
DC/DC CONVERTER BLOCK DIAGRAM ...... |
2-23 |
CIRCUIT DIAGRAMS ................................... |
2-25 |
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1. |
SMPS (POWER) CIRCUIT DIAGRAM ........ |
2-25 |
2. SMPS (DC/DC CONVERTER) |
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CIRCUIT DIAGRAM..................................... |
2-27 |
3. AMP & PWM CIRCUIT DIAGRAM............... |
2-29 |
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4. |
I/O & POWER CIRCUIT DIAGRAM............. |
2-31 |
5. |
XM READY CIRCUIT DIAGRAM................. |
2-33 |
6. |
µ-COM (MAIN) CIRCUIT DIAGRAM............ |
2-35 |
7. |
RF, DRIVE & OPU CIRCUIT DIAGRAM...... |
2-37 |
8. |
MPEG CIRCUIT DIAGRAM ......................... |
2-39 |
9. DSP (MS3900) CIRCUIT DIAGRAM........... |
2-41 |
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10. HDMI CIRCUIT DIAGRAM.......................... |
2-43 |
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11. POWER INTERFACE CIRCUIT DIAGRAM ....... |
2-45 |
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12. USB (UBI9032) CIRCUIT DIAGRAM.......... |
2-47 |
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13. T-SLIDE CIRCUIT DIAGRAM ..................... |
2-49 |
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14. LOGO & RCU CIRCUIT DIAGRAM ............ |
2-50 |
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15. KEY CIRCUIT DIAGRAM............................ |
2-51 |
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16. EJECT CIRCUIT DIAGRAM ....................... |
2-52 |
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17. HEADPHONE & USB CIRCUIT DIAGRAM ... |
2-53 |
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18. RCU CIRCUIT DIAGRAM ........................... |
2-54 |
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19. TOUCH PAD CIRCUIT DIAGRAM.............. |
2-55 |
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
• CIRCUIT VOLTAGE CHART ................... |
2-57 |
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PRINTED CIRCUIT DIAGRAMS............... |
2-59 |
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1. DVD MAIN P.C.BOARD .............................. |
2-59 |
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2. MAIN SMPS P.C.BOARD ............................ |
2-63 |
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3. |
DC/DC CONVERTER P.C.BOARD............. |
2-64 |
4. MAIN AMP P.C.BOARD............................... |
2-65 |
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5. TOUCH PAD P.C.BOARD ........................... |
2-69 |
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6. TOUCH SLIDE P.C.BOARD ........................ |
2-71 |
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7. I/O P.C.BOARD ........................................... |
2-71 |
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8. HDD TO MAIN ATAPI P.C.BOARD.............. |
2-73 |
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9. USB & PHONE P.C.BOARD ....................... |
2-73 |
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10. |
EJECT P.C.BOARD..................................... |
2-74 |
11. LOGO P.C.BOARD...................................... |
2-73 |
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12. |
KEY P.C.BOARD......................................... |
2-74 |
13. |
LED 1 P.C.BOARD...................................... |
2-75 |
14. |
LED 2 P.C.BOARD...................................... |
2-75 |
15. |
RCU P.C.BOARD ........................................ |
2-76 |
2-1 |
LGE Internal Use Only |
ELECTRICAL TROUBLESHOOTING GUIDE
1. SMPS TROUBLESHOOTING FLOW
No 5.6VA
YES
Is the F901 normal?
YES
Is the BD901 normal?
YES
Is the TH902 normal?
YES
Is the Vcc (16V - 25V)
supplied to C923?
YES
Is the D944 normal?
YES
Is there about 2.5V at the IC942 pin1?
YES
Is the D948 normal?
YES
Is the D946 normal?
YES
Is the D940 normal?
YES
Is the D942 normal?
YES
Power line of main PCB is short
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Replace the F901 (Use the same fuse)
Replace the BD901
Replace the TH902
Is the D907 normal?
NO
Check or Replace the D907
Replace the D944
Replace the IC942
Replace the D948
Replace the D946
Replace the D940
Replace the D942
LGE Internal Use Only |
2-2 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
No 14VA
YES
Is the Vcc(18V~25V)
supplied to C923?
YES
Is the D940, D942
normal?
YES
Power line of DC/DC PCB is short
No 12V
YES
Is there about 13.5V at the IC947 pin1?
YES
Is there about 3.3V~ 5V at the IC947 pin4?
YES
Check the IC947 and replace
No 3.5V
YES
Is there about 4V at the IC955 pin1?
YES
Is there about 3.3V~ 5V at the IC947 pin4?
YES
Check the IC955 and replace
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
NO
NO
NO
NO
NO
NO
Check or replace the D907
Replace the D940, D942
Check or replace the D946
Check the PWR_CTRL ‘H’
signal from µ-com
Check or replace the D948
Check the PWR_CTRL ‘H’
signal from µ-COM
2-3 |
LGE Internal Use Only |
No 32VA
YES
Is the F901 normal?
YES
Is the BD901 normal?
YES
Is the TH902 normal?
YES
Is Vcc (18V - 25V)
supplied to C903?
YES
Are the D941 normal?
YES
Is there about 2.5V at the IC949?
YES
Power line of AMP PCB is short
NO |
Replace the F901 |
(Use the same fuse)
NO
Replace the BD901
NO
Replace the TH902
NO
Is the Q904 Normal?
YES
Check or Replace the Q904
NO
Replace the D941
NO
Replace the IC949
LGE Internal Use Only |
2-4 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
2. DC/DC TROUBLESHOOTING FLOW
No 3.3V
YES
Is there about 14V at the IC201 pin2?
YES
Is there about 3.3V at the C241,C203?
YES
Check the IC201 and replace
No 12V
YES
Is there about 13.5V at the IC260 pin1?
YES
Is there about 12V at the IC260 pin2?
YES
Check the IC260 and replace
No 5.1V
YES
Is there about 14V at the IC202 pin2?
YES
Is there about 5V at the
C208?
YES
Check the IC202 and replace
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
NO
Check or replace the SMPS 14VA line
NO |
Check the PWR_ CTRL ‘H’ |
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signal from µ-com |
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NO
Check or replace the SMPS 14VA line
NO |
Check the PWR_CTRL ‘H’ |
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signal from µ-com |
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NO
Check or replace the SMPS 14VA line
NO |
Check the PWR_CTRL ‘H’ |
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signal from µ-COM |
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2-5 |
LGE Internal Use Only |
No sound
YES
IC109
Input/Output check
YES
Is Check about
CN101 pin28, 30?
YES
JK701 Output check
Graphic FL no operation
YES
Check the CN103 pin15, 16, 17 5V/3.3V?
YES
Check the IC110/105
data line?
YES
Check the IC101 pin1~9, 73~80
µ-com IC
YES
Is check IC101 pin19, 20, 50 +5V?
YES
Is Check X101
Ocillation O.K?
YES
Check the IC101 pin10 reset.
NO
IC204/205 Input check
NO
Check and IC109 replace
NO
Check the DC-DC CN902 + 5V.
NO
Replace IC110 / 105
NO
Check IC101 pin1 PWR_SENSE +5V?
NO
X101 replace
NO
IC101 replace
LGE Internal Use Only |
2-6 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
DVD no video output
YES
Check the
R1048 +5.6V?
YES
Check the
IC503 pin29, 43 +3.3V.
YES
Replace the IC503
HDMI no output
YES
Check the TV option.
YES
Check FB915 +5V?
YES
Check the IC507 pin109, 110
AMP IC
YES
Check The IC701/702
output signal.
YES
Is check Vcc line?
YES
Check the IC701 / 702 output signal.
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
NO
Check the AMP/SMPS +5.6V.
NO
Check the CN902 pin9 ~ 11 +3.3V
NO
Change the HDMI(PAL).
NO
Replace IC801
NO
Check IC101 pin1 PWR_SENSE +5V?
NO
Refer to the power part.
NO
Check the DC power component
NO
Replace AMP IC
2-7 |
LGE Internal Use Only |
3. AMP PROTECTION
"PROTECTION" appears on the FLD.
After unplug power cord, connect again.
Power on.
"PROTECTION" appears continuously on the FLD
YES
Is the IC101 pin25 "LOW" signal(0V)?
YES
Is the Q701 normal?
YES
Replace TI AMP IC(IC701, IC702).
NO
OK.
NO
Replace IC101.
NO
Replace the Q701.
LGE Internal Use Only |
2-8 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
WAVEFORMS
1. WHEN POWER ON, RESET (DVD & µ-COM) WAVEFORM
IC507
• RESET(DVD) : PIN2
• RESET(u-COM) : PIN10
2. AT USB FUNCTION, DP, DM WAVEFORM
IC501
Playing at USB function
• USB_N:PIN71
• USB_P:PIN73
Copyright © 2007 LG Electronics. Inc. All right reserved. |
2-9 |
LGE Internal Use Only |
Only for training and service purposes |
|
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3. STARTING ACTION WAVEFORM IN MD DEVICE
IC401
1. SLO
2. SLED1+ : PIN39
3. SLED2- : PIN38 (At Power on)
4. AT DVD FUNCTION
IC401 |
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1. |
FDO : PIN5 |
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2. |
F+ |
: PIN52 |
3. |
F- |
: PIN51 |
(INSERT DVD)
LGE Internal Use Only |
2-10 |
Copyright © 2007 LG Electronics. Inc. All right reserved. |
|
|
Only for training and service purposes |
5. AT POWER ON, SPINDLE SIGNAL AT MD DECK
IC401
1. Spin : PIN26
2. Spin+
3. Spin-
6. TRACKING SIGNAL
IC401
1. Tro : PIN4
2. Tr- : PIN53
3. Tr+ : PIN54
Copyright © 2007 LG Electronics. Inc. All right reserved. |
2-11 |
LGE Internal Use Only |
Only for training and service purposes |
|
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