Daewoo XG-524K, XG-525, XG-525V, XG-525K, XG-526 Service Manual

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Service Manual

DAEWOO DAT CO., LTD.

Model:XG-52x[V][K]Series

XG-53x[V][K]Series

XW-52x[K]Series XW-53x[K]Series

SN : 9CD8304100

JUN. 2005

XG-52x[V][K]Series XG-53x[V][K]Series

XW-53x[K]Series

XW-52x[K]Series

1 2 3 4 5 6 7 8 9

SAFETY PRECAUTIONS

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ADJUSTMENTS

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EXPLODEDVIEWANDPARTSLIST

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WIRING DIAGRAM

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BLOCK DIAGRAM

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SCHEMATIC DIAGRAM

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CD Section MP3/VCD Section FRONT Section TAPE and FUNCTION Section AMP Section MIC Section POWER Section

PCB PATTERN LAYOUT

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MAIN AMP FRONT POWER

ELECTRICAL PART LIST

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Appendix

TableofContents

Mini component sound system

with CD-R/RW/MP3/Video CD playback

XG-522[V]/524[V][K)/525[V][K)/526[V][K)/527[V][K)/528[V][K)

XG-532[V]/534[V][K)/535[V][K)/536[V][K)/537[V][K)//538[V][K)

Mini component sound system

with CD-R/RW playback

XW-522/524[K)/525[K)/526[K)/527[K)/528[K)

XW-532/534[K)/535[K)/536[K)/537[K)/538[K)

SafetyPrecautions

4 5 6

7 8 9

1 2 3 4 5 6 7 8 9

WARNING

: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE

THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION :

TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULTED "DANGEROUS VOLTAGE"

WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE

SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE.

CAUTION

TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

LASER SAFETY

THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE DUE TO POSSIBLE EYE INJURY.

CAUTION :

USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES

OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

CAUTION :

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF

PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION :

POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND.

Important Safety Instructions

- All the safety and operating instructions should be read before

the appliance is operated.

- The safety and operating instructions should be retained for

future reference.

- All warnings on the appliance and in the operating instructions

should be adhered to.

- All operating and use instructions should be followed.

1. Water and Moisture - The appliance should not be used near

water - for example, near a bathtub, washbowl, kitchen sink,

laundry tub, in a wet basement, or near a swimming pool, and the like.

2. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by th manufacturer.

3. An appliance and cart combination

should be moved with care. Quick

stops, excessive force, and uneven surfaces may cause the appliance

and cart combination to overturn.

4. Wall or Ceiling Mounting - The appli-

ance should be mounted to a wall or

ceiling only as recommended by the manufacturer.

5. Ventilation - The appliance should be situated so that its

location or position does not interfere with its proper

ventilation. For example, the appliance should not be situated

on a bed, sofa, rug, or similar surface that may block the

ventilation openings; or, placed in a built-in installation, such

as a bookcase or cabinet that may impede the flow of air through the ventilation openings.

6. Heat - The appliance should be situated away from heat

sources such as radiators, heat registers, stoves, or other

appliances (including amplifiers) that produce heat.

7. Power Sources - The appliance should be connected to a

power supply only of the type described in the operating

instructions or as marked on the appliance.

8. Grounding or Polarization - The precautions that should be

taken so that the grounding or polarization means of an appliance is not defeated.

9. Power - Cord Protection - Power-supply cords should be

routed so that they are not likely to be walked on or pinched

by items placed upon or against them, paying particular

attention to cords at plugs, convenience receptacles, and the

point where they exit from the appliance.

10.Protective Attachment Plug - If the appliance is equipped with

an attachment plug having overload protection. This is a

safety feature. See Instruction Manual for replacement or

resetting of protective device. If replacement of the plug is

required, be sure the service technician has used a

replacement plug specified by the manufacturer that has the same overload protection as the original plug.

11.Cleaning - The appliance should be cleaned only as recommended by the manufacturer.

12.Power Lines - An outdoor antenna should be located away from power lines.

CAUTION

RISK OF ELECTRIC SHOCKS

DO NOT OPEN

PORTABLE CART

Figure 2

1 2 3 4 5 6 7 8 9

SafetyPrecautions

1 2 3 4 5 6 7 8 9

13.Outdoor Antenna Grounding - If an outside antenna is

connected to the receiver be sure the antenna system is grounded so as to provide some protection against voltage

surges and built-up static charges. Article 810 of the National

Electrical Code, ANSI/NFPA 70, provides information with

regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna-dis charge unit, size of grounding conductors,location of antennadischarge unit, connection to grounding electrodes and requirements for the grounding electrode. See Figure 1.

14.Non-use Periods - The power cord of the appliance should be

unplugged from the outlet when left unused for a long period of time.

15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

16.Damage Requiring Service - The appliance should be serviced by qualified service personnel when:

a) The power-supply cord or the plug has been damaged; or

b) Objects have fallen, or liquid has been spilled into the appliance; or c) The appliance has been exposed to rain; or

d) The appliance does not appear to operate normally or

exhibits a marked change in performance; or

e) The appliance has been dropped, or the enclosure damaged.

17.Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions.

All other servicing should be referred to qualified service personnel.

ANTENNA DISCHARGE UNIT (NEC SECTION 810-20)

ANTENNA LEAD IN WIRE

POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250 PART H)

GROUND CLAMP

ELECTRIC SERVICE EQUIPMENT

GROUNDING CONDUCTORS (NEC SECTION 810-21)

GROUND CLAMPS

EXAMPLE OF ANTENNA GROUNDING

NEC - NATIONAL ELECTRICAL CODE

Adjustments

1 2 3

4 5 6

7 8 9

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TAPE SECTION

Test Tape be used

HEAD ADJUSTMENT (AZIMUTH)

1. 10KHz test tape(example: MTT-114N) must be used for this adjustment.

2. Connect to VTVM or oscilloscope to the headphone jack or speaker terminal.

3. Press the play button.

4. Adjust the azimuth by using a screw driver to maintain the max. L&R output voltage.

5. Adjust tape A(1), tape B(2) respectively, Please secure the azimuth position by using locking paint.

RECORDING BIAS OSCILLATOR FREQUENCY ADJUSTMENT

1. Connect the frequency counter to TP603, GND.

2. Press the REC button.

3. Adjust L600 to obtain 80 KHz

500Hz

Tape Contents Use

MTT-111N 3 KHz Tape Speed Adjustment MTT-114N 10 KHz Head Azimuth Adjustment MTT-5511/ Blank Record Frequency Property

VTVM

Scope

R-CH

L-CH

47 kohm

Input Level Measurement Point

Input Point

Output Level Measurement

Point

TAPE ALIGNMENT CHART

Step Item Reference Value Test Tape Adjust Point Test Point Note FIG.

Tape Speed Adjustment

Normal

3,015~3,025Hz MTT-111N RV600

Line Out L/R Channel

Confirm Wow & Flutter is within 0.35%

FIG.1

3,000~3,010Hz MTT-111N RV600

Line Out L/R Channel

Confirm Tape Speed of end position after adjustment at tape start position

FIG.1

High

5,820~6,180Hz MTT-111N - - - - - -

Confirm High speed after normal speed adjustment

FIG.1

Azimuth Adjustment

Maximum Level Phase:Within90∞

MTT-114N Head Screw

Line Out L/R Channel

FIG.2,3,4

Recording Bias Oscillator Frequency Adjustment

80 KHz

±0.5

MTT-5511

L600

TP603,GND

Adjust with frequency counter connected.

FIG.1

FIG. 1 : Tape Speed & Record Bias Oscillator

Frequency Adjust Circuit

Test Tape : MTT-111N(3kHz)

MTT-5511(Blank)

Frequency Counter

Output Level Measurement Point

Set

FIG. 2 : Tape Azimuth Adjust Location

(Record/Playback Head)

FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform

FIG. 4 : Tape Azimuth Adjust Circuit & Waveform

Forward

Side

Reverse

Side

Adjust with Frequency

Counter Connected

L-CH Peak

R-CH Peak

Screw

Angle

Output Level

within

1 dB

within

1 dB

L-CH Peak

R-CH Peak

Screw Angle

Oscilloscope

L-CH

Output Level Measurement Point

Set

Test Tape MTT-114N

(10kHz)

Screen Pattern

In Phase 45 90 135 180

Good Wrong

ExplodedViewandMechanical PartsList

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3 4 5 6

7 8

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27-1

27-2

OP1

XG-522[V] Model Only

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ExplodedViewandMechanical PartsList

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