Daewoo AKF-0305 Series Bedienungsanleitung

Service Manual

Car Audio Basic, RDS & OIRT Band

S/M No : AKF0305EF1

MODEL : AKF-0305 Series

AKF-0315 Series

DAEWOO ELECTRONICS CO., LTD

http://svc.dwe.co.kr Mar. 2000

4-Channel High Power (35W x 4Ch)

Electronic Tuning

Electronic Volume/Bass/Treble/Balance/Fader Controls

Auto Memory/Preset Scan

Repeat/Random/Intro Scan

Loudness Controls

Local/DX Switch

Detachable Face for Anti-Theft

TABLE OF CONTENTS

1. PRODUCT SPECIFICATIONS .........................................1

2. LINE DRAWING ...................................................2

3. EMERGENCY TROUBLE SHOOT ...................................5

4. ADJUSTMENTS ...............................................................9

5. SCHEMATIC DIAGRAM ..................................................14

6. PARTS LOCATION ON P.C.BOARD ...........................17

7. OVERALL EXPLODED VIEW & PARTS LIST ..................23

DECK MECHANISM EXPLODED VIEW & PARTS LIST

...........25

9. PARTS LIST .......................................................................28

10. FUNCTION OF MICOM IC ...............................................30

11. IC BLOCK DIAGRAM ...................................................39

12. LIQUID CRYSTAL DISPLAY .........................................46

13.

OUTPUT CONNECTION DESCRIPTIONS

..........................48

1. PRODUCT SPECIFICATIONS

AUDIO SECTION

Maximum output power : 35watts per channel into 4 ohms.

Load impedance : 4 ohms

Total harmonic distortion : Less than 10% at 12 watts

Fre uency response : 100Hz( + 3dB), 10kHz(-5 + 3dB)

Control Bass/Treble : 10 + 3dB at 100Hz/10kHz

TAPE SECTION

Track format : 2-track / 2-channel system

Tape speed : 4.8cm/sec

Wow / Flutter : 0.35%max. (WRMS)

Fre uency response normal (LH)tape : 63Hz to 10kHz

TUNER SECTION

(FM) Tuning range : 87.5 to 108MHz

87.5 to 107.9 at U.S.A

Usable Sensitivity(MONO) : 12dBuV(4

/ 75ohms)

Signal to noise ratio (at 60dBu)

More than 50dB

(MW) Tuning range : 522 to 1620kHz at Europe

530 to 1710kHz at U.S.A

Usable Sensitivity : 30dBuV

(LW) Tuning range : 144 to 288kHz

Usable Sensitivity : 40dBuV

GENERAL

Power re uirements : DC 12.0V / Rated : 14.4V

(Usable : 10.8 ~15.6V)

Negative ground

Current consumption : 10A Maximum

Dimension (W x H x D) : 178 x 50 x 156 mm

Weight(Net) : 1.75 kg

Design and specifications are subject to changes for improvements without notice.

2. LINE DRAWING

2-1. AKF-0305 Front Side

BASIC

RDS

LINE DRAWING

2-2. AKF-0315 Front Side

BASIC

RDS

LINE DRAWING

2-3. REAR SIDE

BASIC MODEL

RDS MODEL

RDS+CD CHANGER MODEL

3. EMERGENCY TROUBLE SHOOT

3-1. General Function

No sound from

speakers

Yes

Output connector

is missing

Output connector

is inferior goods

Put exactly output

connector in.

Change output

connector to

superior goods

Yes

Power IC, Output

Socket is inferior

goods

Change Power IC,

Output Socket to

superior goods

Yes

L.C.D or L.E.D

is not turned

off.

Yes

Power is not

supplied Ref. Point

Output voltage of

power IC is little.

Change Regulator

IC and check

output voltage.

Yes

LCD or LED is

inferior goods.

Change LCD or

LED to superior

goods.

Yes

Different each

channel have

output level

( ront, Rear,

Left, Right)

Treble or Bass

is low

unusually

Yes

Balance of front

and rear is in one

side

Balance of Left,

Right is in one

side.

Re-adjust Balance

of front, rear

Ref.

Balance = Center

Front:00 / Rear:00

Ref.

Balance = Center

Left:00 / Right:00

Ref.

Balance = Center

Treble:00 / Bass:00

Ref.

Regulator IC output

Voltage = V

Ref.

Electrical Parts List

L.C.D., L.E.D.

Re-adjust Balance

of Left, Right

Yes

Balance of Treble

or Bass is in one

side.

Re-adjust Balance

of Treble or Bass

Yes

EMERGENCY TROUBLE SHOOT

3-2. Tuner Function

Hearing noise

only

Yes

No selected the

station

Tuner Module is

inferior goods.

Select exactly

broadcasting

fre uency.

Change tuner

module to

superior goods.

Yes

Weak fre uency

area caused by

elevations

Change to goods of

R.D.S function.

Yes

Station in

other regions

are not held.

Yes Yes

No selected the

local stations. Ref. Point or

Extreme noise

in broadcast

Weak

separation of

M stereo

Yes

Antenna

connector is

missing

Put exactly

antenna connector

in his jack

Ref.

CAT-6, 7 etc

Electrical Parts List

Function of auto-

switch noise

reduction

Ref.

Yes

Weak fre uency

area of FM, AM

Switch

automatically to

mono mode in

weak fre uency

area

Yes

R1 In case of located Glass Antenna, check if heat wire is cut or not in rear window.

R1 Check Antenna connector part.

EMERGENCY TROUBLE SHOOT

3-3. Tape Function

No sound from

speakers

Yes

Tape is inferior

goods

No signal play

output

Use only superior

goods

Put exactly deck

output connector

in.

Yes

Deck Mechanism

is inferior goods.

Change Deck

Mechanism to

superior goods.

Yes

Sound is low or

not clear

Yes Yes

Head is dirty

Ref. Point

Clean head or

pinch roller with

cleaner

Tape is not

inserted into

the slot.

Some program

is played back

repeatedly

Yes

Tape was inserted

right side left.

Tape is ejected

after being

inserted.

Insert recording

part to right side.

Ref.

Tape Deck Macha

ADM-21/22

Ref.

Tape is cut or

extended

Ref.

Check on L.C.D

and press RPT

button.

Yes

Selected repeat

(RPT) function.

Release RPT

function

Yes

EMERGENCY TROUBLE SHOOT

3-4. CDC Function

Disc is not

inserted.

Yes

Discs are fold in

magazine slot.

Magazine is not

inserted rightly

Put one disc in

magazine slot.

Insert exactly

magazine

Yes

Inside degree of

the unit is

extreme

Turn power off and

stop operation for

about 1 hour

Yes

Selection time

is longer than

unusually

Yes

Selected PAUSE

function

Release PAUSE

function

Yes

Selected MUTE

function

Release MUTE

function

Yes

Mechanism is

inferior goods

Change

Mechanism to

superior goods

Yes

Inspect disc for

scratches.

Yes

No sound

Yes

Indoor degree is

so cold

8Pin connector is

missing

Turn power on

and stand by for

about 1 hour

Ref.

protective function

is started caused by

inside degree is

extreme.

Ref. DWEC CD-C series

AKD-60, 70, 80, 100C

Ref. DWEC CD-C series

AKD-60, 70, 80, 100C

Put exactly CD-C

8Pin connector in.

Yes

Disc is inferior

goods

Change disc to

superior goods

Yes

Disc is dirty

Wipe with cleaning

cloth

Yes

Ref. Point

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