Daewoo AKD-0115 User Manual

Service Manual

Car Audio Basic, RDS

S/M No:AKD0105EF1

MODEL : AKD-0105 Series

AKD-0115 Series AKD-0205 Series AKD-0225 Series AKD-0235 Series

4-Channel High Power (35W x 4Ch) Electronic Tuning Electronic Volume/Bass/Treble/Balance/Fader Controls CD Player with AM/FM Radio Loudness Controls Detachable Face for Anti-Theft

DAEWOO ELECTRONICS CO., LTD

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

TABLE OF CONTENTS

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

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

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

4. ADJUSTMENTS ..................................................................8

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

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

7. OVERALL EXPLODED VIEW & PARTS LIST ..................26

DECK MECHANISM EXPLODED VIEW & PARTS LIST

...........28

9. PARTS LIST .......................................................................32

10. FUNCTION OF MICOM IC ...............................................34

11. IC BLOCK DIAGRAM ...................................................46

12. LIQUID CRYSTAL DISPLAY .........................................52

13.

OUTPUT CONNECTION DESCRIPTIONS

..........................56

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 Frequency response : 100Hz( + 3

), 10kHz(-5 + 3dB)

Control Bass / Treble : 10 + 3

at 100Hz/10kHz

TUNER SECTION

(FM) Tuning range : 87.5 to 108MHz

Usable Sensitivity (MONO) : 12

/ 75ohms)

Signal to noise ratio (at 60dBu)

: More than 50

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

530 to 1710kHz at U.S.A

Usable Sensitivity : 30dBuV (75ohms at 100kHz)

(LW) Tuning range : 144 to 288kHz

Usable Sensitivity : 40dBuV

CD SECTION

Signal to Noise ratio : 70dB (Using the A filter)

Dynamic range : 85dB

Channel Separation : 50dB Total Harmonic distortion : 0.1% Revolution : 12m/s~1.4m/s (500rpm~200rpm) Laser (semiconductor laser) : Wave length 785nm

GENERAL

Power requirements : 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.

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential

difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is

included in the repair parts.

The flexible board is easily damaged and should be handled with care.

* Use of controls or adjustments or performance of procedure other than those specified here-in may result in

hazardous radiation exposure.

* During repair, do not take the Optical Pick-up block apart.

If there is a breakdown in the Optical Pick-up block (including laser diode), replace the entire deck mechanism.

2. LINE DRAWING

2-1. AKD-0105 Series Front Side

AKD-0105 R-RDS

AKD-0115 R-RDS

LINE DRAWING

AKD-0205E, A-Non RDS : BASIC

AKD-0205 R - RDS

AKD-0225 R - RDS

AKD-0235 E Non RDS : BASIC

2-2. AKD-0205 Series Front Side

LINE DRAWING

2-3. AKD-0105/0205 Rear Side

BASIC MODEL

RDS 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 (Front, 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 frequency.

Change tuner module to superior goods.

Yes

Weak frequency 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 FM stereo

Yes

Antenna connector is missing

Put exactly antenna connector in his jack

Ref.

CAT-6, 7 etc Electrical Parts List

Function of autoswitch noise reduction.

Ref.

Yes

Weak frequency area of FM, AM

Switch automatically to mono mode in weak frequency area

Yes

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

Check Antenna connector part.

EMERGENCY TROUBLE SHOOT

3-3. CD Function

Disc is not inserted.

Yes Yes

There is Disc in the slot

Take out Disc from the slot

Disc is inferior goods

Use only superior disc

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

Turn power on again after turn off.

Yes

Inspect disc for scratches.

Yes

No sound

Yes

disc was inserted upside down

Insert CD with label side down

Ref.

DWEC CD Mecha Ddcm-200/201

Ref.

Power Off/On Hard Reset

Disc is dirty

Wipe with cleaning cloth

Yes

Ref. Point

Disc is stopped under eject

Yes

It is normal for CD-Deck or the slot

Yes

4. ADJUSTMENT

4-1. EQUIPMENTS CONNECTIONS

ADJUSTMENTS

4-2. TUNER MODULE ADJUSTMENT LOCATIONS

ADJUSTMENTS

4-3. AM (MW/LW) ADJUSTMENT METHOD

STEP

1 Band Covering

RF-Tracking

Figure 1

Figure 2

Figure 1

Figure 2

522KHz 60dBu

Mod 1000Hz 30%

603KHz 30dBu

Mod 1000Hz 30%

1404KHz 30dBu

Mod 1000Hz 30%

144KHz 60dBu

Mod 1000Hz 30%

220KHz 60dBu

Mod 1000Hz 30%

522KHz

603KHz

1404KHz

144KHz

220KHz

Adjust AM OSC for 1.2-1.35V Fig.7

Adjust AM RF1 and AM RF2 for maximum output Fig.7

Adjust LW OSC for 1.2-1.35V(VT) Fig.7

Adjust LW RF1 and LW RF2 for maximum output Fig.7

RF-Tracking

LW Band Covering

LW-Tracking

DESCRIPTION

CONNECTION

ANTENNA SIGNAL

DIAL

CONTROL

ADJUSTMENT

1. Dummy Antenna Circuit

2. Location of Adjustment Points

Refer to Adjustment Location Page

3. Control Setting

Power Switch .................. ON Balance/Fader Control ...................... Mech. Center

Band Switch ..................... AM Treble/Bass Control ........................... Mech. Center

Other ................................ OFF

4. Adjustment Procedure

ADJUSTMENTS

4-4. FM ADJUSTMENT METHOD

STEP

1 IF(Zero Volt)

RDS Receiving estimation level

Figure 3

Figure 4

Figure 5

98.1MHz 60dBuV No Modulation

98.1MHz 42dBuV Mod.

1kHz 30% Mono

98.1MHz 60dBuV Mod.

1kHz 30% Stereo Left

alt.Right ch.

98.1MHz 35dBuV Mod.

1kHz 30% Stereo Left

alt.Right ch.

98.1MHz

Adjust FM DET for 0V + 0.03V Fig.6

Adjust RV 101 Tuner PC Board for2.7V=20mV at TP102 (IC204 pin 66)

Adjust MPX SEP Fig.6 for maximum separation Left and Right ch.

Adjust STBEND Fig.6 1dB separation between Left and Right ch.

Stereo Separation

SRC

DESCRIPTION

CONNECTION

ANTENNA SIGNAL

DIAL

CONTROL

ADJUSTMENT

1. Dummy Antenna Circuit

2. Location of Adjustment Points

Refer to Adjustment Location Page

3. Control Setting

Power Switch ................... ON Balance/Fader Control ...................... Mech. Center

Band Switch ...................... FM Treble/Bass Control .......................... Mech. Center

Other ................................ OFF

4. Adjustment Procedure

ADJUSTMENTS

4-5. CDP MODE TEST & ADJUSTMENT METHOD

Definition of Mechanical Mode

STOP MODE

MODE

PLAY MODE

EJECT MODE

- Disc haven’t been inserted or disc have been ejected. When disc shall be transported into the unit Mechanism shall be fixed at this mode.

- Loading device can insert disc thru the slot.

- Floating device being locked.

- Disc have been inserted thru the slot in front of unit. It is transient state between STOP mode and PLAY mode.

- If disc should be inserted at the state of POWER ON, disc shall be loaded by a series of operation of specified device.

- After disc have being clamped on the turn-table, disc shall be rotated.

- Disc shall be played.

- Floating device being unlocked.

- Disc is to be ejected at this mode. It is transient state between PLAY mode and STOP mode.

If disc should be mounted at the state of POWER ON and commanded by EJECT key, disc shall be ejected thru the slot by a series of operation of specified device.

MODE DEFINITION & STATUS

Standard values / Play-ability test

Loading Time

Ejecting Time

Access Time

Disc Take-up Force

Disc

Clamping Force

Mechanical

Noise

7sec + 3sec

6sec + 3sec

17 sec

15 sec

5 sec

Loading Eject

< 75dB(A) Play < 40dB(A) Access < 70dB(A)

> 120g > 120g

> 80g

> 130g

If anything is not

error, shall not

defined.

> 90g

During play in

low temp.

> 70g

During play in

low temp.

Fig.6

From insertion up to make sound. (TCD-784)

From track No.1 Between the EJECT command and the disc eject completion. (TCD-784)

From out-most Track, Between the PLAY command of in-most Track and marking sound.

Shall be measure when the center of Disc is correspond with the center of Roller.

-Test should be performed in no reverberation room at the noise level of less than 20dB(A).

-Test should be performed at the 50cm in front of the unit.

-IHF-A MODE (RMS-FAST)(TCD-792D)

ITEMS

CONNEC

TION

SPECIFIED VALUES, CONDITIONS

STANDARD VALUES RELIABILITY LIMITS

TEST CONDITIONS, REFERENCES

ADJUSTMENTS

Anti-Vibrational Performance

Playability

Disc Deflection

Disc Eccentricity

Jitter

Frequency Response

Harmonic Distortion

Dynamic Range

S/N Ratio

Channel

+ 0.4mm

+ 0.21mm

< 28 nsec

< 0.03% at 1kHz

> 80dB at 1kHz

> 85dB at 1kHz

> 70dB at 1kHz > 65dB at 1kHz

> 85dB at 1kHz

> 75dB at 1kHz

< 0.05% at 1kHz

20-20kHz + 2dB 20-20kHz + 3dB

< 33 nsec

+ 0.21mm

+ 0.4mm

equal with

standard values

-Interruption:0.7mm

-Block Dot Disc:0.8mm

-Scratch Disc:1mm

Finger Print Disc:65um

>1.0g/10Hz-20Hz, Z way

>2.0g/30Hz-200Hz, Z way

>0.6g/10Hz-20Hz, X&Yway

>1.2g/30Hz-200Hz, X&Yway

X=side to side

Y=front to back

Z=up to down

Z way only

10Hz-20Hz:0.7g

30Hz-200Hz:1.2g

Fig.6

-The G level should be upped to the sound skip level from the less level slowly at the frequency.

-Ignore the sound skip at the near of resonance frequency(about 100Hz).

-In playing YEDS-10 Tr #5, shall perform with vibration

-No sound skipping.

-No sound skipping in the specified range.

-The sound skipping does not include any interpolating noise.

-No sound skipping at the ABEX 731RA Tr No8

-The sound skipping does not include any interpolating noise.

-Except from specified item due to the reliability limits of TEST DISC in the HTO TEST.

-No sound skipping at the ABEX 713 Tr No8

-The sound skipping does not include any interpolating noise.

-Except from specified item due to the reliability limits of TEST DISC in the HTO TEST.

This measurement may be done at 20Hz, 20kHz, (1kHz=0dB)

400Hz HIGHPASS FILTER 20kHz(-60dB 24kHz) LOWPASS FILTER

20kHz(-60dB 24kHz) LOWPASS FILTER, 60dB AMP IHF-A WEIGHTING FILTER

400Hz HIGHPASS FILTER 20kHz (-60dB 24kHz)LOWPASS FILTER

ITEMS

CONNEC

TION

SPECIFIED VALUES, CONDITIONS

STANDARD VALUES RELIABILITY LIMITS

TEST CONDITIONS, REFERENCES

5. SCHEMATIC DIAGRAMS

5-1. BASIC Series

AKD-0105A-PH / AKD-0205E / AKD-0225E / AKD-0235A

Size:A3

SCHEMATIC DIAGRAM

AKD-0205R / AKD-0225(7)R / AKD-0235(7)R

5-2. RDS Series

Size:A3

SCHEMATIC DIAGRAM

5-3. CDP Circuit for

AKD-0105 / AKD-0205 Series

(DCM-200 / 201)

Size:A3

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