Samsung HW-C450 Manual de usuario

SERVICE

Manual

Crystal Surround Air Track

Refer to the service manual in the GSPN (see the rear cover) for the more information.

CONTENTS

1. Precaution

2. Product Specification

3. Disassembly & Reassembly

4. Troubleshooting

5. Exploded View & Part List

6. PCB Diagram

7. Schematic Diagram

Crystal Surround Air

Track

Model Name : HW-C450

Model Code : HW-C450/EDC

HW-C450

This Service Manual is a property of Samsung Electronics

Co.,Ltd. Any unauthorized use of Manual can be punished

under applicable International and/or domestic law.

GSPN (Global Service Partner Network)

Area Web Site

North America service.samsungportal.com

Latin America latin.samsungportal.com

CIS cis.samsungportal.com

Europe europe.samsungportal.com

China china.samsungportal.com

Asia asia.samsungportal.com

Mideast & Africa mea.samsungportal.com

Printed in Korea

Contents

1. Precaution

1-1 Safety Precautions...........................................................................................1-1

1-2 Servicing Precautions ......................................................................................1-3

1-3 Precautions for Electrostatically Sensitive Devices (ESDs).............................1-4

2. Product Specification

2-1 Product Feature ...............................................................................................2-1

2-2 Specifications...................................................................................................2-2

2-3 Specifications Analysis.....................................................................................2-3

2-4 Accessories......................................................................................................2-4

3. Disassembly & Reassembly

3-1 Overall Disassembly & Reassembly ................................................................3-1

4. Troubleshooting

4-1 Checkpoints by Error Mode..............................................................................4-1

4-2 Measures to be taken when the Protection Circuit operates ...........................4-15

4-3 Initialization & Update .....................................................................................4-17

5. Exploded View & Part List

5-1 Exploded View .................................................................................................5-1

5-2 Speaker System...............................................................................................5-3

5-3 Electrical Part List ............................................................................................5-4

6. PCB Diagram

6-1 Wiring Diagram ................................................................................................6-1

6-2 VFD PCB Top...................................................................................................6-2

6-3 VFD PCB Bottom .............................................................................................6-3

6-4 KEY PCB Top...................................................................................................6-4

6-5 KEY PCB Bottom .............................................................................................6-5

6-6 MAIN PCB Top .................................................................................................6-6

6-7 MAIN PCB Bottom ...........................................................................................6-9

6-8 SMPS PCB Top................................................................................................6-11

6-9 SMPS PCB Bottom ..........................................................................................6-13

Contents

7. Schematic Diagram

7-1 Overall Block Diagram .....................................................................................7-1

7-2 KEY..................................................................................................................7-2

7-3 VFD..................................................................................................................7-3

7-4 U-COM.............................................................................................................7-4

7-5 INPUT JACK ....................................................................................................7-5

7-6 DSP..................................................................................................................7-6

7-7 PWM ................................................................................................................7-7

7-8 IR AMP.............................................................................................................7-8

7-9 SMPS...............................................................................................................7-9

Samsung Electronics 1-1

Precaution

1. Precaution

Follow these safety instructions while servicing the ESD to prevent damage and to protect against potential

hazards such as electrical shock and X-rays.

1-1 Safety Precautions

1. When reinstalling the chassis and its assemblies, be sure to restore all of the protective devices, including the

control knobs and the compartment covers.

2. Make sure that there are no cabinet openings through which people (particularly children) can make contact

with dangerous internal components.

3. Design Alteration Warning:

Never alter or add to the mechanical or electrical design of the unit.

Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard.

Also, any design changes or additions will void the manufacturer’s warranty.

4. Leakage Current Hot Check (Fig. 1-1):

Warning: Do not use an 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 Publication UL1410,

59.7).

With the unit completely reassembled, plug the AC cord

directly into a 120V AC outlet. With the unit’s power

switched from the ON to the OFF position, measure the

current between a known ground and all exposed metal

parts.

Known Grounds - Earth

Known Metal parts - screwheads, metal cabinets, etc.

5. Insulation Resistance Cold Check:

(1) With the unit’s AC plug disconnected from the AC

source, connect an electrical jumper across the two AC

prongs. (2) Set the power switch to ON. (3) Measure

the resistance between the shorted AC plug and any

exposed metallic parts.

Example: screwheads, metal cabinets, antenna port

If any of the exposed metallic parts has a return path

to the chassis, the measured resistance should be

between 1 and 5.2 megohms. If there is no return path,

the measured resistance should be “infinite.” If the resistance is outside these limits, a shock hazard might

exist. See Fig. 1-2

DEVICE

UNDER

TEST

LEAKAGE

CURRENT

TESTER

TEST ALL

EXPOSED METAL

SURFACES

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC

ADAPTER PLUG

AS REQUIRED)

EARTH

GROUND

(READING

SHOULD NOT BE

ABOVE 0.5mA)

<Fig. 1-1 AC Leakage Test>

Antenna

Terminal

ohm

<Fig. 1-2 Insulation Resistance Test>

Exposed

Metal Part

Ohmmeter

1-2 Samsung Electronics

Precaution

6. Components, parts and wiring that appear to have overheated or that are otherwise damaged should be

replaced with parts that meet the original specifications. Always determine the cause of damage or overheating,

and correct any potential hazards

7. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and

especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring.

Do not change the spacing between components and the printed circuit board. Check the AC power cord for

damage. Make sure that no wires or components touch thermally hot parts.

8. Product Safety Notice:

Some electrical and mechanical parts have special safety-related characteristics which might not be obvious

from visual inspection. These safety features and the protection they give might be lost if the replacement

component differs from the original--even if the replacement is rated for higher voltage, wattage, etc.

9. Components that are critical for safety are indicated in the circuit diagram by shading, or . Use

replacement components that have the same ratings, especially for flame resistance and dielectric strength

specifications. A replacement part that does not have the same safety characteristics as the original might

create shock, fire or other hazards.

Samsung Electronics 1-3

Precaution

1-2 Servicing Precautions

1. Servicing precautions are printed on the cabinet. Follow them.

2. Always unplug the unit’s AC power cord from the AC power source before attempting to: (a) Remove or reinstall

any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in

parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes

used. The internal wiring may be clamped to prevent contact with thermally hot components. Reinstall all such

elements to their original position.

4. After servicing, always check that the screws, components and wiring have been correctly reinstalled.

Make sure that the portion around the serviced part has not been damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal

panels, input terminals and earphone jacks).

6. Insulation Checking Procedure: Disconnect the power cord from the AC source. Connect an insulation

resistance meter (500V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above)

should be greater than 1 megohm.

7. Any B+ interlock should not be damaged. Do not apply AC power to the unit (or any of its assemblies) unless

all solid-state heat sinks are correctly installed.

8. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive

lead; always remove the instrument’s ground lead last.

First read the “Safety Precautions” section of this manual. If some unforeseen circumstance

creates a conflict between the servicing and safety precautions, always follow the safety

precautions.

1-4 Samsung Electronics

Precaution

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Some semiconductor (“solid state”) devices are easily damaged by static electricity.

Such components are called Electrostatically Sensitive Devices (ESDs).

Examples include integrated circuits and some field-effect transistors. The following techniques will reduce the

occurrence of component damage caused by static electricity;

1. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from

your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to

remove it prior to applying power--this is an electric shock precaution.)

2. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent

accumulation of electrostatic charge.

3. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.

4. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.

5. Use only an anti-static solder removal device. Many solder removal devices are not rated as “anti-static” (these

can accumulate sufficient electrical charge to damage ESDs).

6. Do not remove a replacement ESD from its protective package until you are ready to install it.

Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam,

aluminum foil or other conductive materials.

7. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective

material to the chassis or circuit assembly into which the device will be installed.

8. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes

together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.

Samsung Electronics 2-1

Product Specification

2. Product Specification

2-1 Product Feature

280W (80W x 2 + 120W)

2.1ch, Wireless (Active)

DD, DTS

1 analog / 2 opticals

Smart Volume II

Virtual Surround

(Music / News / Movie / Drama / Game / Sports / Pass)

2 Way 3 Spk

2-2 Samsung Electronics

Product Specification

2-2 Specifications

Basic Specification

GENERAL

Power supply AC 120V, 60Hz

Standby power consumption 0.75W

Power

consumption

Main unit 45W

Subwoofer 20W

Weight

Main unit 5.01 Ibs

Subwoofer 12.01Ibs

Dimensions

(W x H x D)

Main unit 37.66 x 3.62 x 1.77 inches

Subwoofer 6.89 x 13.78 x 11.61 inches

Operating temperature range +41°F to +95°F

Operating humidity range 10% to 75%

AMPLIFIER

Rated output

power

Main unit 80W/CH, 4Ω, THD = 10%, 1kHz

Subwoofer 120W, 4Ω, THD = 10%, 100Hz

Input sensitivity/impedance 450mV/20KΩ

S/N ratio (analog input) 70dB

Separation (1kHz) 70dB

FREQUENCY

RESPONSE

Analog input 20Hz ~ 20kHz (±3dB)

Digital input/48kHz PCM 20Hz ~ 20kHz (±3dB)

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