Daewoo DHC-2300K Schematic

SERVICE

Manual

DVD PLAYER

DVD PLYAER

DHC

CONTENTS

2300K

1. Precautions

2. Reference Information

3. Product Specification

4. Operating Instructions

5. Disassembly and Reassembly

6. Troubleshooting

7. Electrical Part List

8. Block Diagram

9. PCB Diagrams

11. Schematic Diagrams

should not exposed Meter

1. Precautions

1-1 Safety Precautions

1) Before returning an instrument to the customer,

and then in the OFF position, measure from a always make a safety check of the entire instrument, including, but not limited to, the following items:

(1) Be sure that no built-in protective devices are defective or have been defeated during servicing. (1) Protective shields are provided to protect both the technician and the customer. Correctly replace all missing protective shields, including any remove for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including, but not limited to, nonmetallic control knobs, insulating fish papers, adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not operate this instrument or permit it to be operated without all protective devices correctly installed and functioning.

known earth ground (metal water pipe, conduit,

etc.) to all exposed metal parts of the

instrument (antennas, handle brackets, metal

cabinets, screwheads, metallic overlays,

control shafts, etc.), especially and exposed

metal parts that offer an electrical return path

to the chassis.

Any current measured must not exceed 0.5mA. Reverse the instrument power cord plug in the outlet and repeat the test. See Fig. 1-1. Any measurements not within the limits specified herein indicate a potential shock hazard that must be eliminated before returning the instrument to the customer.

(Reading

Device

Under

Test

Test all

Sufaces

be above

0.5mA)

(2) Be sure that there are no cabinet openings

through which adults or children might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, excessively wide cabinet ventilation slots, and an improperly fitted and/or incorrectly secured cabinet back cover.

(3) Leakage Current Hot Check-With the

instrument completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use a isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards institute (ANSI) C101.1 Leakage

Current for Appliances and Underwriters Laboratories (UL) 1270 (40.7). With the instrument’s AC switch first in the ON position

2-Wire Cord

Also test with Plug

reserved (Using AC

adapter Plug as

Fig. 1-1 AC Leakage Test

(4) Insulation Resistance Test Cold Check-(1)

Unplug the power supply cord and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the instrument. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and all exposed metallic cabinet parts on the instrument, such as screwheads, antenna, control shafts, handle brackets, etc. When an exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 megohm. When there is no return path to the chassis, the reading must be infinite. If the reading is not

Earth Ground

Safety Precautions

(5) within the limits specified, there is the possibility

the AC power cord for damage. of a shock hazard, and the instrument must be re-pared and rechecked before it is returned to the customer. See Fig. 1-2.

Antenna Terminal

Exposed Metal Part

ohm

Fig. 1-2 Insulation Resistance Test

2) Read and comply with all caution and safety related notes non or inside the cabinet, or on the chassis.

3) Design Alteration Warning-Do not alter of add to the mechanical or electrical design of this instrument. Design alterations and additions, including but not limited to, circuit modifications and the addition of items such as auxiliary audio output connections, might alter the safety characteristics of this instrument and create a hazard to the user. Any design alterations or additions will make you, the service, responsible for personal injury or property damage resulting there from.

4) Observe original lead dress. Take extra care to assure correct lead dress in the following areas: (1) near sharp edges, (2) near thermally hot parts (be sure that leads and components do not touch thermally hot parts), (3) the AC supply, (4) high voltage, and (5) antenna wiring. Always inspect in all areas for pinched, out-of-place, or frayed wiring, Do not change spacing between a component and the printed-circuit board. Check

ohmmeter

5) Components, parts, and/or wiring that appear to have overheated or that are otherwise damaged should be replaced with components, parts and/or wiring that meet original specifications. Additionally determine the cause of overheating and/or damage and, if necessary, take corrective action to remove and potential safety hazard.

6) Product Safety Notice-Some electrical and mechanical parts have special safety-related characteristics which are often not evident from evisual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by shading, an ( ) or a ( ) on schematics and parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might created shock, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

1-2 Servicing Precautions

CAUTION : Before servicing Instruments covered

(3) The components used in the unit have a by this service manual and its supplements, read and follow the Safety Precautions section of this manual.

Note : If unforeseen circument create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember: Safety First.

1-2-1 General Servicing Precautions

(1) a. Always unplug the instrument’s AC power cord from the AC power source before (1) re moving or reinstalling any component, circuit board, module or any other instrument assembly, (2) disconnecting any instrument electrical plug or other electrical connection,

specified flame resistance and dielectric

strength.

When replacing components, use components

which have the same ratings. Components I-

enti-fied by shading, by ( ) or by ( ) in the

circuit diagram are important for safety or for the

characteristics of the unit. Always replace them

with the exact replacement components.

(4) An insulation tube or tape is sometimes used

and some components are raised above the printed wiring board for safety. The internal wiring is sometimes clamped to prevent contact with heating components. Install such elements as they were.

(5) After servicing, always check that the removed (3) connecting a test substitute in parallel with an electrolytic capacitor in the instrument.

b. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. c. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. d. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last.

Note : Refer to the Safety Precautions section ground lead last.

screws, components, and wiring have been installed correctly and that the portion around the serviced part has not been damaged and so on. Further, check the insulation between the blades of the attachment plug and accessible conductive parts.

1-2-2 Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet

and turn the power ON. Connect the 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(see note) should be more than 1

Megohm.

(2) The service precautions are indicated or printed on the cabinet, chassis or components. When servicing, follow the printed or indicated service precautions and service materials.

Note : Accessible conductive parts include metal

panels, input terminals, earphone jacks, etc.

1-3 ESD Precautions

Electrostatically Sensitive Devices (ESD)

its protective package until immediately before you

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

components 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

(7) Immediately before removing the protective

CAUTION : Be sure no power is applied to the

chassis or circuit, and observe all other safety

precautions.

(8) Minimize bodily motions when handling

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).

materials from the leads of a replacement ESD device touch the protective material to the chassis or circuit assembly into which the device will be installed.

unpackaged replacement ESD devices. 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 device.

(4) Use only an anti-static solder removal devices.

Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage 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).

(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

2. Reference Information

2-1 Component Descriptions

2-1-1 DVD ATAPI LOADER (DSL-710A)

* D.C. Power Supply

A 4-pin shrouded, keyed male connector is used to provide the D.C. Power. The pin assignment is described below.

PIN DC VOLTS 1 +12V 2 GND 3 GND 4 +5V

Figure-1 D.C. Power Connector

* Interface Connector

A 39-pin male, unshielded, shrouded, keyed connector are applied. Please refer to Section 7-2-3 regarding its pin definition.

39 1 40 2 Interface Connector

* Electrical Charateristics

1. Power

1-1. Voltage +5V DC with ±5% tolerance, less than 100mVp-p Ripple Voltage

+12V DC with ±10% tolerance, less than 150mVp-p Ripple Voltage

1-2. Current

Continuous Reading

Seeking & Spin up

+5V DC 500mA (Average)

+12V DC 300mA (Average)

+5V DC 0.8 A (Maximum)

+12V DC 1.5 A (Maximum)

2. Signal Summary The physical interface consists of single ended TTL compatible receivers.

3. Connector Pin Definition

Component Descriptions

I/F Signals I/O Pin # I/F Signals I/O Pin # Reset 1 DMARQ 21

GND 2 GND 22 DD7 3 DIOW 23 DD8 4 GND 24 DD6 5 DIOR 25 DD9 6 GND 26 DD5 7 IORDY 27 DD10 8 CSEL 28 DD4 9 DMACK 29 DD11 10 GND 30 DD3 11 INTRQ 31 DD12 12 IOCS16 32 DD2 13 DA1 33 DD13 14 PDIAG 34 DD1 15 DA0 35 DD14 16 DA2 36 DD0 17 CS1FS 37 DD15 18 CS3FS 38 GND 19 DASP 39 NC 20 GND 40

Appendix 1. DSL-710A Block Diagram

Disc

Disc Motor Unit

Laser

Pickup

Spindle

Motor

BA6664FM

Spindle Motor Drive

Focus

Coil

Actuator Signal

Track

Coil

4Ch Motor Drive

Sled

Motor

BA5954FP

Spindle Motor Signal for CLV

MT1366

(RF AMP.)

Laser Driver

Equalizer

Error Gen.

Motor

Motor Signal

33.86MHz

MT1368

(Decoder/Servo)

ATAPI

Buffer Manager

Demodulator

Error Correction

PLl

Focus & Tracking

Feeding Loading

DRAM (4Mbit)

I/F

Conn.

GND

Flash

Memory

(1Mbit)

80C52

System Controller

GND

12V

Component Descriptions

Appendix 2. Key-Components List

Items Model No. Maker Location

Spindle Motor

Loading Motor

Sled Motor

Laser Pick-up SF-HD3 Sanyo Japan Actuator Drive BA5954FP Rohm Japan Spindle Motor Drive BA6664FM Rohm Japan RF Amp. MT1366 Media Tek Taiwan Servo / DSP MT1368 Media Tek Taiwan

DMDSPC41C Samsung Korea RSM-2811F Samhongsa Korea

RF-300CA-11440 Mabuchi Japan MDN3BL3CSA Matsushita Japan RF-300CA-11440 Mabuchi Japan MDN3BL3CSA Matsushita Japan

Component Descriptions

2-1-2 Fiber Optic Transmitting Module for Digital Audio Eqipments (TOTX178)

* Recommended Operating Conditions

Item Symbol Min. Typ. Max. Unit Supply Voltage Vcc 4.75 5.0 5.25 V High Level Input Voltage VIH 2.0 - Vcc V Low Level Input Voltage VIL 0 - 0.8 V

Component Descriptions

2-1-3 NTSC/PAL Digital Video Encoder (ADV7170)

Comonent Descriptions

Component Descriptions

2-1-4 DVD Processor Chip (Swan-2TM ES4318)

* Features

l Single-chip DVD video decoder in a 208-pin PQFP package l Supports MPEG-1 system and MPEG-2 program streams l Programmable multimedia processor architecture l Compatible with Audio CD, Video CD, VCD 3.0, and Super Video CD(SVCD) l DVD Navigation 1 l Built-in Content Scrambling System(CSS)

- Audio

l Built-in Karaoke key-shift function l DolbyTM Digital 2-channel downmix audio output for DolbyTM l Dolby Pro Logic l Linear PCM streams for 24 bit / 96KHz l Concurrent S/PDIF out and 2-channel audio output l Sensaura Dolby Digital Virtual Surround l DTS Digital Surround 2-channel downmix stereo output l S/PDIF output for encoded AC-3, DTS Digital output or Linear PCM

- Peripheral

l Glueless unterface to DVD loaders (ATAPI or A/V bus I/F) l Bidirectional I2C audio interface l Direct servo / loader interface l 8 general-purpose auxiliary ports l Single 27MHz clock input

- Smart Technology

l SmartZoom l SmartScale l SmartStream

for motion zoom & pan

for NTSC to PAL conversion and vice versa

for video error concealment

Component Descriptions

* Functional Description

Component Descriptions

* Pinout Diagram

Component Descriptions

*PIN DESCRIPTION

Name Number I/O Definition

1, 9, 18, 27, 35, 44, 51, 59, 68, 75, 83,

VCC

LA[21:0] 23:19,16:10,7:2,207:204 O Device address output.

VSS

RESET# 24 I Reset input, active low.

TDMDX O TDM transmit data

RSEL 25 I

TDMDR 28 I TDM receive data.

TDMCLK 29 I TDM clock input.

TDMFS 30 I TDM frame synch.

TDMTSC# 31 O TDM output enable, active low.

TWS

SEL_PLL1

TSD

SEL_PLL0

SEL_PLL2 36

MCLK 39 I/O Audio master clock for audio DAC. TBCK 40 I/O Audio transmit bit clock.

SDIF_DOBM 41 O S/PDIF (IEC958)Format Output.

RSD 45 I Audio receive serial data.

RWS 46 I Audio receive frame synch.

RBCK 47 I Audio receive bit clock.

APLLCAP 48 I Analog PLL Capacitor.

XIN 49 I Crystal input.

XOUT 50 O Crystal output.

DMA[11:0] 66:61, 58:53 O DRAM address bus.

DCAS# 69 O Column address strobe, active low.

DOE#

DSCK_EN

DWE# 71 O DRAM write enable, active low.

DRAS[2:0]# 74:72 O Row address strobe, active low.

DB[15:0] 96:93, 90:85, 82:77 I/O DRAM data bus.

DCS[1:0]# 97, 100 O SDRAM chip select [1:0], active low.

DQM 101 O Data input / output mask. DSCK 102 O Clock to SDRAM. DCLK 105 I Clock Input(27MHz).

YUV[7:0] 115:113, 110:106 O 8-bit YUV output.

PCLK2XSCN 116 I/O 2X pixel clock.

PCLKQSCN 117 I/O Pixel clock.

1. VSY NC H#

121, 130, 139, 148, 157, 164, 172, 183,

8,17,26,34,43,52,60,67,76,84,91,98,103, 38,147,156,163,171,177,184,192,200,20

92, 99, 104, 111,

193, 201

112,120,129,1

118 I/O

I 3.65 V ± 150 mv.

I Ground.

ROM Select

RSEL Selection 0 16-bit ROM 1 8-bit ROM

0 0 2.5 x DCLK 0 1 3 x DCLK 1 0 3.5 x DCLK 1 1 4 x DCLK

Select PLL2. See the table for pin number

Audio transmit frame sync.

Select PLL1.

Audio transmit serial data port.

Select PLL0.

SEL_PLL2 SEL_PLL0 Clock

Output

33.

Output enable, active low.

Clock enable, active low.

Vertical synch for screen video interface,

programmable for rising or falling edge,

active low.

Component Descriptions

Name Number I/O Definition

Horizontal synch for screen video

HSYNCH# 119 I/O

HD[15:0] 141:140, 137:131, 128:122 O Host data bus HCS1FX# 152 O Host select 1. HCS3FX# 153 O Host select 3.

HIOCS16# 151 I Device 16-bit data transfer.

HA[2:0] 158, 155:154 I/O Host address bus.

VPP 159 I Peripheral protection voltage.

HWR#/DCI_

ACK#

HRD#DCI_C

HD[15:0] 141:140, 137:131, 128:122 I/O Host data bus.

HWRQ# 142 O Host write request.

HRDQ# 143 O Host read request.

HIRQ 144 I/O Host interrupt.

HRST# 145 O Host reset.

HIORDY 146 I Host I/O ready

HWR# 149 O Host write request.

AUX[7:0] 169:165, 162:160 I/O Auxiliary ports.

LOE# 170 O Device output enable, active low.

LCS[3:0]# 176:173 O Chip select[3:0], active low.

LD[15:0] 197:194, 191:185, 182:178 I/O Device data bus.

LWRLL# 198 O Device write enable, active low.

LWRHL# 199 O Device write enable, active low.

NC 37, 38, 42, 203:202 No Connect pins. Leave open

149 I,I 150 I,I Host read/DCI Interface Clock.

interface, programmable for rising or falling

edge, active low.

Host write/DCI Interface Acknowledge

Signal, active low.

Component Descriptions

2-1-5 DIGITAL-TO-ANALOG STEREO AUDIO CONVERTER (CS4391)

Component Descriptions

2-1-6 DIGITAL-TO-ANALOG STEREO AUDIO CONVERTER (CS4340)

Component Descriptions

+ 55 hidden pages