LG RH-7900 Service manual

1-2

SECTION 1

SUMMARY

CONTENTS

NEW FUNCTIONS OF HDD/DVD-RECORDER ................................................................. 1-2

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS.............. 1-3

SERVICING PRECAUTIONS .................................................................................................. 1-4

• General Servicing Precautions

• Insulation Checking Prodedure

• Electrostatically Sensitive Devices

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

SPECIFICATIONS ...................................................................................................................... 1-6

1-3

NEW FUNCTIONS OF HDD/DVD-RECORDER

• HDMI

HDMI IS THE SPECIFICATION FOR THE HIGH-DEFINITION MULTIMEDIA INTERFACE. HDMI IS PROVIDED FOR TRANSMITTING DIGITAL TELEVISION AUDIOVISUAL SIGNALS FROM HDD-DVD RECORDER TO TELEVISION SETS, OTHER VIDEO DISPLAYS. HDMI CAN CARRY HIGH QUALITY MULTI-CHANNEL AUDIO DATA AND CAN CARRY ALL STANDARD AND HIGH DEFINITION CONSUMER ELECTRONICS VIDEO FORMATS. CONTENT PROTECTION TECHNOLOGY IS AVAILABLE. HDMI CAN ALSO CARRY CONTROL AND STATUS INFORMATION IN BOTH DIRECTIONS.

<< OPERATING >>

AUDIO, VIDEO AND AUXILIARY DATA IS TRANSMITTED ACROSS THE THREE TMDS DATA CHANNELS. THE VIDEO PIXEL CLOCK IS TRANSMITTED ON THE TMDS CLOCK CHANNEL AND IS USED BY THE

RECEIVER AS A FREQUENCY REFERENCE FOR DATA RECOVERY ON THE THREE TMDS DATA CHANNELS.

VIDEO DATA IS CARRIED AS A SERIES OF 24-BIT PIXELS ON THE THREE TMDS DATA CHANNELS. TMDS ENCODING CONVERTS THE 8BIT PER CHANNEL INTO THE 10BIT DC–BALANCED. VIDEO PIXEL RATES CAN RANGE FROM 25MHZ TO 165MHZ. THE VIDEO PIXELS CAN BE ENCODED IN EITHER RGB,YCBCR 4:4:4 OR YCBCR 4:2:2 FORMATS. IN ALL THREE CASES, UP TP 24 BITS PER

PIXEL CAN BE TRANSFERRED.

FAST DUBBING

DUBBING MEANS A COPYING FUNCTION BETWEEN HDD TO DVD DISCS. COPYING BETWEEN HDD TO DVD IS A COMPLETELY DIGITAL PROCESS AND THEREFORE INVOLVES

NO LOSS OF QUALITY IN THE AUDIO OR VIDEO. SO THIS MEANS THAT COPYING CAN BE CARRIED OUT AT THE MAXIMUM SPEED POSSIBLE.

<< DUBBING SPEED RATE >>

NORMAL DUBBING : SPEED RATE MAX X1 FAST DUBBING : SPEED RATE MAX X4

WHEN FAST DUBBING FROM HDD TO DVD , THE SPEED OF COPYING DEPENDS ON THE RECORDING MODE AND THE KIND OF USING THE DVD DISC, AND THIS MODE IS NOT AVAILABLE FOR EDITED VIDEO TITLE IN HDD.

WHEN FAST DUBBING FROM DVD TO HDD , ONLY AVAILABLE WHEN COPYING VR MODE DISC(DVDRW) TO HDD , AND ONLY NORMAL DUBBING AVAILABLE WHEN COPYING VIDEO MODE DISC

(DVD+R/RW, DVD-R) TO HDD

1-4

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 Electronics 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 Electronics 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 the AC 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 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC 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 milliamp AC. 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. Wall- and 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. A product 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.

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

A.C. Voltmeter

Good Earth Ground such as the Water Pipe, Conduit, etc.

0.15uF

1500 OHM

10 WATT

Place this probe on each exposed metal part.

1-5

SERVICING PRECAUTIONS

CAUTION : Before servicing the HDD/DVD Recorder 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.

Remembers Safety First:

General Servicing Precautions

1. Always unplug the HDD/DVD Recorder AC power cord

from the AC power source before: (1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnection or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an elec-

trolytic 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 HDD/DVD

Recorder 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 HDD/DVD Recorder and/or

any of its electrical assemblies unless all solid-state device heat sinks are cerrectly installed.

6. Always connect test instrument ground lead to the

appropriate ground before connection 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 including 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 grouned-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protec tive 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.)

1-7

SPECIFICATIONS

• GENERAL

Power requirements AC 110-240V, 50/60 Hz Power consumption 45W Dimensions (approx.) 430 X 49 X 350 mm (w x h x d) without foot Mass (approx.) 4.6 kg Operating temperature 5˚C to 35˚C Operating humidity 5 % to 90 %

Recording format PAL

• RECORDING

Recording format DVD Video Recording, DVD-VIDEO Recordable media HDD (80GB), DVD-ReWritable,

DVD-Recordable, DVD+ReWritable, DVD+Recordable, DVD+Recordable (Double Layer)

Recordable time DVD (4.7GB): Approx. 1 hour (HQ mode), 2 hours (SQ mode),

4 hours (LQ mode), 6 hours (EQ mode)

DVD+R DL (8.5GB): Approx. 3 hour (HQ mode),

3 hours 40 minutes (SQ mode), 7 hours 10 minutes (LQ mode), 11 hours 30 minutes (EQ mode)

HDD (80GB): Approx. 20 hour (HQ mode), 40 hours (SQ mode),

74 hours (LQ mode), 111 hours (EQ mode)

Video recording format

Sampling frequency 27MHz Compression format MPEG 2 (VBR support)

Audio recording format

Sampling frequency 48kHz Compression format Dolby Digital

• PLAYBACK

Frequency response DVD (PCM 48 kHz): 8 Hz to 20 kHz, CD: 8 Hz to 20 kHz

DVD (PCM 96 kHz): 8 Hz to 44 kHz Signal-to-noise ratio More than 100 dB (AUDIO OUT connector) Harmonic distortion Less than 0.008% (AUDIO OUT connector) Dynamic range More than 95 dB (AUDIO OUT connector)

• INPUTS

AERIAL IN Aerial input, 75 ohms VIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack x 2 / SCART x 2 AUDIO IN 0 dBm more than 47 kohms, RCA jack (L, R) x 2 / SCART x 2 DV IN 4 pin (IEEE 1394 standard)

• OUTPUTS

VIDEO OUT 1 Vp-p 75 Ω, sync negative, RCA jack x 1 / SCART x 2 COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync, RCA jack x 1

(Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2 Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack x 1 Audio output (optical audio) 3 V (p-p), 75 Ω, Optical connector x 1 Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 / SCART x 2

2-1

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

1. Cabinet and Main Frame Section ..........................................................................................2-2

2. Deck Mechanism Section(RL-05S) ........................................................................................2-3

3. Packing Accessory Section ...................................................................................................2-4

2-2

EXPLODED VIEWS

1. Cabinet and Main Frame Section

BCD

OPTIONAL PART

A44

260

320

261

468

463

468

463

A46

270

468

A52

467

267

300

465

265

250

463

A47

463

272

463

457

A60

100

103

102

468

273

410

261

A53

A26

104

275

103

463

457

274

410

102

A48

103

102

103

101

452

275

A50

280

A54

452

275

A43

283

2-3

2. DECK MECHANISM SECTION(RL-05S)

1434

1026

1435

1015

1005

1016

1001

1003

1013

1014

A001

1002

1434

1012

1019

1011

1009

1038

1024

1432

1029

1019

1025

1027

1020

1433

1437

1029

1432

1033

1021

A60

A000

1030

1025

1027

1432

1032

1432

1017

A004

1436

1018

1018A

1018B

1018C

1018E

1018D

1042

1434

1006

1041

A002

1434

2-4

808 Battery

Cable, Coaxial

Plug Ass’y, 1Way

Plug Ass’y, 2Way

Bag

Packing

Remote Control

Instruction Ass’y

Packing

Box

806

804

803

811

812

FLAT CABLE

822

801

900

802

803

810

CABLE ASS’Y

821

SCART CABLE

OPTIONAL PART

3. Packing Accessory Section

3-1

SECTION 3

ELECTRICAL

CONTENTS

HDR PART

ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

1. SMPS I/O PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

2. SMPS DVD/HDD PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

3. SYSTEM CIRCUIT PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

4. DISC NOT RECOGNIZED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

5. WHEN PLAYING DISC, NO AUDIO OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

6. NO OPTICAL/DIGITAL OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

7. NO TUNER AUDIO OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

8. NO EXTERNAL INPUT AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

9. NO RGB/COMPONENT VIDEO SIGNAL WHEN PLAY DISC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

10. NO COMPOSITE/S-VIDEO SIGNAL WHEN PLAY DISC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

11. NO TV, EXTERNAL INPUT VIDEO SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

12. NO DV(IEEE 1394)INPUT(VIDEO/AUDIO) SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

1. OVERALL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

2. LAYOUT CONNECTION BLOCK DIAGRAM_1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

3. LAYOUT CONNECTION BLOCK DIAGRAM_2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

4. SMPS BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22

5. POWER : MAIN BOARD BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24

6. POWER : I/O BOARD BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26

7. IN/OUT BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28

8. VIDEO BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30

9. VIDEO SW PATH BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32

10. AUDIO BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-34

11. AUDIO SW PATH BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-36

12. AUDIO IN / OUT BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-38

13. FLD / µ-COM / TUNER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-40

CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-42

1. POWER CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-42

2. E5 BGA, POWER, UART2 CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-44

3. DDR SDRAM, FLASH CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-46

4. RST, CONTROL/STATUS REG, ADDRESS LATCH CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-48

5. HDMI TX / IEEE1394 CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-50

6. VIDEO IN/OUT CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-52

7. MEMORY, ATAPI, I/O CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54

8. I/O MICOM CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-56

9. TUNER, MPX, ADC, DAC, JACK CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-58

10. JACK CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-60

11. KEY CIRCUIT DIAGRAM ( 5 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62

12. KEY CIRCUIT DIAGRAM ( 6 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64

13. KEY CIRCUIT DIAGRAM ( 8 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66

14. KEY CIRCUIT DIAGRAM ( 9 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-68

15. TIMER CIRCUIT DIAGRAM ( 5 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-70

16. TIMER CIRCUIT DIAGRAM ( 6 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-72

17. TIMER CIRCUIT DIAGRAM ( 8 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-74

18. TIMER CIRCUIT DIAGRAM ( 9 TOOL ONLY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-76

•

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-78

•

CIRCUIT VOLTAGE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-80

PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-86

1. MAIN P.C.BOARD(TOP SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-86

2. MAIN P.C.BOARD(BOTTOM SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-88

3. I/O P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-90

4. JACK P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-90

5. HDD P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-92

6. POWER P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-93

7. KEY P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-94

8. TIMER(LED) P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-95

3-2

ELECTRICAL TROUBLESHOOTING GUIDE

HDR PART

Replace the BD101

Replace the F101 (Use the same Fuse)

No 5.3VA

Is the F101 Normal?

Is the R101 Normal?

Is the Vcc (10V - 17V) supplied to IC101 Pin2?

Is the BD101 Normal?

Is the D121 normal?

Is there about 2.5V at the IC103 Pin1?

Is the D126 normal?

Is the D130 Normal?

Is the D127 Normal?

Is the D128 Normal?

Power Line of I/O PCB is short

YES

YESYES

YES

Replace the R101

Is the D102 normal?

Check or Replace the D102

Replace the D121

Replace the IC103

Replace the D126

Replace the D130

Replace the D127

Replace the D128

1. SMPS I/O PART 1. SMPS I/O PART

3-3

No 12V

Is there about 3.8V at the IC153 pin1?

Check or Replace the D126

Is there about 3.3V~ 5V at the IC153 pin4?

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

Check the IC153 and Replace

YES

No 5VT

Check or Replace

the D126

Is the Vcc(14V) supplied to Q124 Emittor?

Check or Replace the D124

Is the Vcc(33V) supplied to Q124 Base?

Check the ‘TIMER “H”’ signal from µ-com

Check the 33V Line

YES

No 5VD

Check or Replace the D126

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

Is the Vcc(14V) supplied to Q120 Emittor?

Is the Q120 Base ‘H’?

Check or Replace the Q124

YES

No 12VA /12VT

Check or Replace the D126

Is there about 14V at the IC156 pin1?

Is there about 3.3V~ 5V at the IC156 pin4?

NO NO

Check the ‘TIMER “H”’ signal from µ-com

NO NO

YES

Check the IC156 and Replace

YES

3-4

NO VFD

Check or Replace the R107

Is the R107 Normal?

Is the D128 Normal?

Check or Replace the D128

Check or Replace the ZD151

YES

Is the ZD151 Normal?

Check or Replace the D127

YES

No 33V

Check or Replace

the D130

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

Is the Vcc(33V) supplied to Q123 Emittor?

Is the Q123 Base ‘H’?

Check or Replace the Q123

YES

3-5

Replace the BD101

Replace the F101 (Use the same Fuse)

No 3.8VA

Is the F101 Normal?

Is the TH01 Normal?

Is Vcc (11V -18V) supplied to IC101 Pin3?

Is the BD101 Normal?

Are the D122 normal?

Is there about 2.5V at the IC106 Pin1?

Is the D123 normal?

Is the D124 Normal?

Is the D125 Normal?

Power Line of Main

PCB(VDR) is short

YES

YESYES

YES

Replace the TH01

Is the Q111 normal?

Check or Replace the Q111

Replace the D122

Replace the IC106

Replace the D123

Replace the D124

Replace the D125

2. SMPS DVD/HDD PART

3-6

No 5.0V

Is there about 5.5V at the IC151 pin1?

Check or Replace the D124

Is there about 3.3V~ 5V at the IC151 pin4?

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

Check the IC151 and Replace

YES

No 3.3V

Check or Replace

the D122

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

Is there about 3.8V at the IC154 pin1?

Is there about 3.3V~ 5V at the IC154 pin4?

Check the IC154 and Replace

YES

No 3.3V

Check or Replace

the D122

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

Is there about 3.8V at the IC154 pin1?

Is there about 3.3V~ 5V at the IC154 pin4?

Check the IC154 and Replace

YES

No 2.5V

Check or Replace the D122

Is there about 3.8V at the IC152 pin1?

Is there about 3.3V~ 5V at the IC152 pin4?

NO NO

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

NO NO

YES

Check the IC152 and Replace

YES

3-7

No 12V

Check or Replace the D125

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

Is there about 13.5V at the IC157 pin1?

Is there about 3.3V~ 5V at the IC157 pin2?

Check the IC157 and Replace

YES

No 1.8V

Check or Replace

the D123

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

Is there about 2.3V at the IC160 pin1?

Is there about 3.3V~ 5V at the IC160 pin4?

Are the R167,R168 normal?

Check or Replace the R151,R153

YES

Check the IC160 and Replace

YES

3-8

“Please wait” displayed

Continue at Power On

Check PN802-22 IC 701-19

IC 307-5: ? (/HOST-RESET)

X101: Clock oscillated? (27MHz)

Replace X101

Check IC206 & (Flash MENORY) IC 101

IC 101 DEFECT

YES

R146 : ? IC 206-26 : ?

YES

R180, R181 : ?

YES

3. SYSTEM Circuit PART

Check DRIVER Power? 5V. 12V

Change MEDIA TEST

Check J601

Check SMPS

YES

4. DISC not recognized

CHECK IC808- pin2, 4 (VCC) : pin32,33(SLC/CLK) :

IC 805-pin14,19(z_mute_R/L): IC701-pin58(A_mute_L) :

CHECK IC 805-pin1,2,3,4 : Pin10(reset) : Pin7,8(I2C) :

3-9

5. When playing DISC, no Audio output

CHECK IC802-pin3, 6, 13(VCC)

Replace IC802

YES

IC805-pin15,18 (Audio_out R/L) : Is there a signal?

CHECK Q801, 802, 803, 804, 806

C841, C842 on I/O PCB Is there a signal?

Only “Without SCART model”

IC 808-pin21, 22, 25, 26:Is there a signal?

YES

IC101

DEFECT

C8A3, C8A4 on I/O PCB Is there a signal?

YES

L821,L836: Is there a signal?

YES

CHECK Cable connections & TV Audio mute.

YES

3-10

R101:

CHECK PN802-pin2 (SPDIF_OUT) :

R933 :

CHECK JK803 & RCA cable connection

YES

CHECK JK805 & Optic cable connection

IC101 DEFECT

6. No OPTICAL/DIGITAL Output

3-11

7. No TUNER Audio Output

TU801-pin16(SIF):

Is there a signal?

IC812-30,31: Is there a signal?

IC808-pin20,24,23,27 : Is there a signal?

Check C920 Is there a signal?

Replace IC808

CHECK

IC808-pin2,4(VCC) :

pin32,33(SLC/CLK) :

YES

IC809-pin7, IC810-pin7: Is there a signal?

YES

IC802-pin10,12: Is there a signal?

YES

IC802-pin2,4,7,8 : Pin9(reset) :

When playing DISC, no Audio output

YES

YES YES

Check R839,R841:

CHECK IC811 : Power & In/Out PIN

CHECK IC802-pin3,6,13(VCC)

Replace IC802

YES

3-12

8. No External input Audio

Check R839,R841:

CHECK Cable connections & Input signal.

CHECK IC811 : Power & In/Out PIN

CHECK IC802pin3, 6, 13(VCC)

Replace IC802

YES

IC809-pin7, IC810pin7:Is there a signal?

IC808-pin8,10,14,16 : Is there a signal?

IC809,IC810-pin3: Is there a signal?

IC809,IC810-pin5: Is there a signal?

IC809,IC810-pin1: Is there a signal?

< AV1/AV2 > < AV3 > < AV4 >

CHECK Cable connections & Input signal.

NO NO

IC802-pin10,12: Is there a signal?

IC802-pin2,4,7,8 : Pin9(reset) :

When playing DISC, no Audio output

NO NO

YES

NO YES

YES

3-13

9. No RGB/Component Video signal when play DISC

R131,R132,R133:

Is there a signal?

PN801-7,8,9: Is there a signal?

IC807-pin24,21,18 Is there a signal?

CHECK SW801 statue & SW801-in2(RGB_SEL”H”)

CHECK IC807pin1,16(+5.2V)

Replace IC807

YES

10. No composite/s-video Signal when play DISC

R128,R129,R130:

Is there a signal?

PN801-2,4,6: Is there a signal?

IC807-27,30,32: Is there a signal?

IC808-29.30: Is there a signal?

CHECK IC807pin1,16(+5.2V)

Replace IC807

YES

CHECK IC808pin2,4(+12VA)

YES

Replace IC808

YES

3-14

11. No TV, External input Video signal

CHECK Signal path on the I/O board

C540 : Is there a signal?

Check PN802-pin22 IC 701: reset circuit

Replace IC501

YES

C532,C535,C537: Is there a signal?

C538:Is there a signal?

No video signal of external input AV3 (Rear RCA input)

No video signal of external input AV4 (composite,s-video)

When Cable connecting Tuner and Rear SCART1,2 No TV video signal(AV1/2)

NO NO NO

YES

CHECK Cable connections & Input signal.

IC501- pin34 (reset”H”) :

IC501- pin40 (VI_CLK) : X501 clock oscillated? (14.318MHz)

YES

CHECK No RGB/ component/composite Signal when play DISC

YES

3-15

12. No DV(IEEE 1394)input(Video/Audio) signal

check DV_Jack and CABLE(CN501)

connection

DV-mode switching ?

IC401 power 3.3V

IC 401-37: “High” &X401 oscillated?(24.576MHz)

CHECK SMPS +3.3V

Change to DV-mode. Using Remote Control

CHECK Reset Circuit

YES

IC401-15 Is there a signal?

YES

IC401-pin1, 27, 28, 29, 30: Is there a signal?

YES

IC401-pin 2, 3 : Is there a signal?

YES

IC101 DEFECT

YES

Check DV Cable

YES

Replace IC401

YES

3-16 3-17

BLOCK DIAGRAMS

1. Overall Block Diagram

A3_In

S1 / S2

V3_In

A4_In

V4_In

S_In

DV_In

N/A2

MSP3417

Tuner

A_ADC

CS5340

I/O B'd

V_DEC

Decoder

TVP5146

PHY

TSB41LV03A

MAIN B'd

DDR SDRAM

32MB x2

AI_D0

VOUT_Y/Pb/Pr_R/G

V1_I

DMN8652

BIO_PHY_DATA[0:7]

VOUT_CVB

VOUT_Y_C

A0_IEC958

A0_D 0

HD[0:15]

ATA_CONTROL

I/O B'd

S/PDIF

A_ADC:2ch

CS4351

Buffer

74VC245

74LVC541

74LVC

541

PHY

SAIN

ASTEL

CVBS_Out

S_VIDEO_Out

Y/Pb/Pr or R/G/B

Optical & Digital Audio Out

Analog Audio Out

SOCKET

Memory B'dFront Jack B'd

Front Driver IC

Front Timer B'd

DVD DRIVER

HDD

HD[0:15]

ATAPI1_DATA[0:15] ATAPI1 _...

ATAPI2_DATA[0:15] ATAPI2 _...

SPI I/O Interface

SIO_SPI_CS#0 SIO_SPI_MISO SIO_SPI_MOSI

HA[1:5],HA22

U-COM

Latch

74LVT16373

I/O B'd

HA[6:21]

Flash

8MByte

3-18 3-19

2. Layout Connection Block Diagram_1

P1701

P1T01

SMPS

Board

S1/S2 AV3/S/Comp/DigitalOptical

Tuner

Input/Output Board

5VA5V5VT

3.3V

12VA

12V

PN7101

PN7102

-24V

33VT

VF+

VF-

PN7901

PN7902

PN801

PN802

HDMI

CN501

CN601

Main Board

1.8V

CN502

12V

CN101

2.5V 5VT

3.3V

J601

ATAPI 1

DVD + RW DRIVER

J603

J602

ATAPI 2

12V 5V

HARD DISC DRIVER

P1M01

S/Jack

AV3,DV_in

P1D01

Jack

Board

AV4/S/DV

P9701 P9702

Key

Board

Front Board

3-20 3-21

3. Layout Connection Block Diagram_2

Main Bd'

Main Bdí

SMPS

Jack

15:220mm

Timer 1(Key)

In / Out Bdí

/320mm

4:160

Loader

40:80m

10:160mm

7:160mm

3:160mm

40:80m

40:250mm

6:280mm

12:290m

9-in-2 Memory

(3-in-1 Memory)

(3-in-1 Memory

Timer(FLD)

HDD

PIN 1 10P(8T) 6631R-E092E T K 7P(5.9T) 6631R-E092F T K 3P(6T) 6631R-E092G T K 2 6P 6631R-E066F T M 3 12P 6631R-E066E T M

)

4 40P M m 5 40P 6850R-EA08Y M H 6 40P 6850R-EA08Y M L 7 15P 6631R-E044D M J 8 4P/6P 6631R-H003A P L H 9 5P 6631R-E092D P I 10 15P 6631R-E092C P I 11 13P 6631R-E025S P I

P / N

3-22 3-23

4. SMPS Block Diagram

BD101

NOISE FILTER

BLOCK (C101,L102, L101, C102)

FUSE (F101)

BR BL

(BK)(WH)

Y-CAP C110

R101

C103

Y-CAP C111

SNUBBER

(D101,C105 C106,R103)

DRIVE & S/W BLOCK

(IC101, D102, R105,

C107,C109,R109,

C108,C112,ZD103)

SNUBBER

(D103,C115,C116

,R112,R115)

DRIVE & S/W BLOCK

(IC104, D104, R113,

C117,C114,C119,

BLOCK

ZD102)

T101

PHOTO COUPLER

(IC102)

T102

PHOTO COUPLER

(IC105)

RECTIFIER &

SMOOTING BLOCK

(D128,C133,R107

R128,R129)

RECTIFIER &

SMOOTING BLOCK

(D126,C136)

RECTIFIER &

SMOOTING BLOCK

(D130,C137,R146)

RECTIFIER &

SMOOTING BLOCK

(D121,C122,L121,C124)

FEED-BACK

BLOCK

R121,R122,

ERROR AMP

(IC103

RECTIFIER &

SMOOTING BLOCK

(D125,C139,L127,C140

RECTIFIER &

SMOOTING BLOCK

(D124,C129

RECTIFIER &

SMOOTING BLOCK

(D123,C126)

RECTIFIER &

SMOOTING BLOCK

(D122,C123,L123,C125)

ERROR AMP

(IC106)

)

C121,R123.

R124.R125

R126)

)

FEED-BACK

BLOCK R131,R132, C141,R133.

R161.R162

R163)

RECTIFIER &

SMOOTING BLOCK

(D127,C131,L125,C132)

12V REG & S/W Block

(IC153,R147,C128

12VT REG & S/W Block

(IC156,R150,C153)

33V S/W Block

(Q123,R143,R134

5.0VT S/W Block

(Q120,R142,R144

R145,C120)

5.0VD S/W Block

(Q124,R140,R135,R136

D134,C134)

TIMER 'H' Block

(Q125,R156,R157

PWR CTL Block

(Q126,R164,R165)

12V REG & S/W Block

)

(IC158,R158,C156

5.0V REG & S/W Block (IC151,R152,C151)

1.8V REG & S/W Block (IC160,R159,C152,

R151,R153)

3.3V REG & S/W Block

(IC154,R167,C167,R154)

2.5V REG & S/W Block (IC152,R155,C155)

TO I/O

(P1701)

5.3VA

PWR CTL 'H'

)

5VD

33VT

12VT/12VA

12V

)

3.3V

TIMER 'H'

5VT

7.2V

TO I/O

(P1T01)

FD(+)

)

-26VA FD(-)

)

TO DVD (P1M01)

1.8V

2.5V

3.3V

5.0VD

TO LOADER

(P1D01)

12V

5.0V

3-24 3-25

5. Power : Main Board Block Diagram

3.3V

1.8V2.5V

FLASH

DMN8652

V33_OSC

3.3V

1.8V

5V V5_E5_BIAS

1.25V

LP2995

V33_E5_VPAD V33_E5_AVDD

V33_E5_VDDREF

V33_E5_DAC_AVDD

V18_E5_VCORE

V25_SSTL2 2.5V

VREF

2.5V

DDR

SST2.5V

V25_SSTL2

2.5V

V33_FLASH

3V3D

V33_BREG

3V3D

3V3A

74ALVT16373

74LVC04

74LVC08

74LV

C08

74VC245

74LVC541

74L

VC541

74LVC32

74LVC541

SIL9190

DV33_DVOUT_..

5VD

J603

74HC125

0.3A(100mA)

0.34A(0.25A)

3.3V

3V3D 3V3A

3V3D

TSB41AB1

V33_PHY_A/D

V18_VIA

TVP5146

V33_VIA, V33_VID

PCA9515A

0.55A(0.35A)

1.6A(1.4A)

I/O Ucom PWR CTL

PWR_CTL_

H 1.8V, 2.5V, 3.3V, 5V

2.5V

1.8V

3-26 3-27

6. Power : I/O Board Block Diagram

5VA

)

225)

SYS_5.3VA

U-COM

(MN101DF10GAF)

Reset IC

(KIA7031P)

IA7031P)

PWR Fail

(KIA7042)

(KIA7042

EEPROM

(24LC16B)

(24LC16B

VPS/PDC

(SDA5650)

(SDA

5650)

V. S/W(E.RGB/I.RGB)

(MM1

Etc Logic

Nicam/A2

(MSP3417

Codec_Logic

(CS4271)

S4271)

V.S/W

(MM1623)

(MM1

Optical Drive

Optical Driv

)

623)

12V

Codec_Analog

S4271)

)

S4271)

Diff OP AMP

(NJN553

(NJN5532

(NJM2521)

(NJM

A.SW

2521)

)

5VT

Cync. SEP

(MM1

109)

(MM1109)

Cync. SEP

(MM1510)

(MM1

510)

12VA

V.SW (C+)

(MM1443)

(MM1

443)

33VT

Tuner

3.3V

Codec_Logic

(CS5340)

S5340)

Tuner

Codec_Logic

S4351)

I/O Ucom PWR CTL SIGNAL

PWR_CTL_H 5V, 12V CONTROL

TIMER_H 5VT, 12VA, 33VT

+ 94 hidden pages