Daewoo EKE, NC-NC-, NC-8809E, NC-8809EK Service Manual

Service Manual

MiniComponentSoundSystem

9CD8308000

May. 2009

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SAFETY PRECAUTIONS

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TROUBLE SHOOTING GUIDE

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EXPLODED VIEW AND MECHANICAL PARTS LIST

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WIRING DIAGRAM

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BLOCK DIAGRAM

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SCHEMATIC DIAGRAM

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FRONT Section
FUNCTION Section
MP3/CD Section
AMP Section
POWER Section

P.C.B PATTERN LAYOUT

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FRONT Section
FUNCTION Section
MP3/CD Section
AMP Section
POWER Section

APPENDIX-ELECTRICAL PART LIST

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TableofContents

Mini component sound system

NC-8809E/NC-8809EK

Safety Precautions

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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

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Safety Precautions

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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

TroubleShootingGuide

Check the circuit around

protect pin.

Still shut-down?

Then divide protect pin.

Does triangle wave

flow to S1A0071 3pin??

Refer to EX1.

Check the circuit

that generates

triangle wave

connected with

S1A0071 3pin.

And repair.

Refer to EX2.

Check the circuit

connected with

S1A0071 4PIN.

And repair.

Refer to EX5.

Normal PWM waveform at

S1A0051 10,11,14,15pin?

Refer to EX12.

Relpace components connected

with S1A0071 6,7pin 8,9pin

16,17pin 18,19pin.

Refer to E X13.

Normal PWM waveform

at FET s drain?

Refer to EX1.

Change components

connected with

S1A0071 6,7pin

8,9pin 16,17pin

18,19pin.

Replace divided protect

pin / PASS

AMP Flow Chart-No Output Signal

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TroubleShootingGuide

Check the circuit

around protect pin.

Still shut-down?

Then divide protect pin.

Check circuit that

generates triangle

wave connected

with S1A0071 3pin

And repair.

Refer to EX2.

Check the circuit

connected with

S1A0071 4PIN

And repair

Refer to EX5.

Does Triangle wave

flow to S1A0071 3pin?

Refer to EX1.

S1A0071 6,7pin 8,9pin

16,17pin 18,19pin short.

100ohm open

Refer to EX10.

Normal PWM waveform at

S1A0051 10,11,14,15pin?

Refer to EX12.

Replace components connected

with S1A0071 6,7pin 8,9pin

16,17pin 18,19pin

Refer to EX13.

Normal PWM waveform

at FET s drain?

Refer to EX1.

Change components

connected with

S1A0071 6,7pin

8,9pin 16,17pin

18,19pin

AMP Flow Chart-Abnormal Output Signal

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TroubleShootingGuide

AMP Flow Chart-Test Point and Expected Results(Ex1, 2)

AMP Flow Chart-Test Point and Expected Results(Ex3)

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TroubleShootingGuide

AMP Flow Chart-Test Point and Expected Results(Ex4, 5)

AMP Flow Chart-Test Point and Expected Results(Ex6)

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TroubleShootingGuide

AMP Flow Chart-Test Point and Expected Results(Ex7, 8)

AMP Flow Chart-Test Point and Expected Results(Ex7, 8)

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TroubleShootingGuide

AMP Flow Chart-Test Point and Expected Results(Ex9)

AMP Flow Chart-Test Point and Expected Results(Ex10, 13)

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TroubleShootingGuide

AMP Flow Chart-Test Point and Expected Results(Ex11)

AMP Flow Chart

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TroubleShootingGuide

MP3/CD Section

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CD open and disc insertion

Refer to 2

Spindle motor rotation

Pick-up unit return(outside >>

inside)

Laser diode on

Focusing operation

Read in operation and auto

adjustment

CD play on

Refer to 3

Refer to 4

Refer to 5

Refer to 6

CD close and CD on

Refer to 1

AC cord in

CD start