Daewoo AKD-0105 Series 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
8.
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
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( + 3
dB ), 10kHz(-5 + 3 dB )
Control Bass / Treble : 10 + 3
dB at 100Hz/10kHz
TUNER SECTION
(FM) Tuning range : 87.5 to 108MHz
Usable Sensitivity (MONO) : 12
dB uV
(4 uV / 75ohms)
Signal to noise ratio (at 60dBu) : More than 50 dB
(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 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.
<Notes on handling the optical pick-up block or base unit>
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.
<Caution>
*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
2-1. AKD-0105 Series Front Side
AKD-0105 R-RDS
AKD-0115 R-RDS

LINE DRAWING
3
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
4
BASIC MODEL
RDS MODEL

3. EMERGENCY TROUBLE SHOOT
5
3-1. General Function
No sound from
speakers
Yes
No
Yes
Output connector
is missing
Output connector
is inferior goods
Put exactly output
connector in.
Change output
connector to
superior goods
Yes
No
Power IC, Output
Socket is inferior
goods
Change Power IC,
Output Socket to
superior goods
Yes
A
A
L.C.D or L.E.D
is not turned
off.
Yes
No
Yes
Power is not
supplied Ref. Point
Output voltage of
power IC is little.
Change Regulator
IC and check
output voltage.
Yes
No
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
No
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
Yes
Balance of Treble
or Bass is in one
side.
Re-adjust Balance
of Treble or Bass
Yes

EMERGENCY TROUBLE SHOOT
6
3-2. Tuner Function
Hearing noise
only
Yes
No
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
A
B
A
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
No
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
B
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
7
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
No
Yes
A
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
No
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
No
No
No
Disc is dirty
Wipe with cleaning
cloth
Yes
A
Ref. Point
Disc is stopped
under eject
Yes
It is normal for
CD-Deck or the
slot
Yes

8
4. ADJUSTMENT
4-1. EQUIPMENTS CONNECTIONS

9
ADJUSTMENTS
4-2. TUNER MODULE ADJUSTMENT LOCATIONS

10
ADJUSTMENTS
4-3. AM (MW/LW) ADJUSTMENT METHOD
STEP
1 Band Covering
RF-Tracking
Figure 1
Figure 2
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 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
2
3
4
5
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

11
ADJUSTMENTS
4-4. FM ADJUSTMENT METHOD
STEP
1 IF(Zero Volt)
RDS Receiving
estimation level
Figure 3
Figure 4
Figure 5
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
98.1MHz
98.1MHz
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
4
5
6
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

12
ADJUSTMENTS
4-5. CDP MODE TEST & ADJUSTMENT METHOD
Definition of Mechanical Mode
No
1
2
3
4
STOP MODE
LOADING
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
No
1
2
3
4
5
6
7
Loading Time
Ejecting Time
Access Time
Disc
Take-up Force
Disc
Clamping Force
Mechanical
Noise
7sec + 3sec
6sec + 3sec
<
17 sec
< 15 sec
< 15 sec
< 5 sec
Loading Eject
< 75dB(A)
Play < 40dB(A)
Access < 70dB(A)
> 120g
> 120g
> 80g
> 130g > 130g
If anything is not
error, shall not
defined.
> 90g
During play in
low temp.
> 70g
During play in
low temp.
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
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.
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

13
ADJUSTMENTS
No
8
9
10
11
12
13
14
15
16
17
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
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
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

14
5. SCHEMATIC DIAGRAMS
5-1. BASIC Series
AKD-0105A-PH / AKD-0205E / AKD-0225E / AKD-0235A
Size:A3

SCHEMATIC DIAGRAM
15
AKD-0205R / AKD-0225(7)R / AKD-0235(7)R
5-2. RDS Series
Size:A3

16
SCHEMATIC DIAGRAM
5-3. CDP Circuit for AKD-0105 / AKD-0205 Series (DCM-200 / 201)
Size:A3

17
6. PARTS LOCATION ON P.C. BOARD
6-1. PCB MAIN : AKD-0105/0205 Series
PARTS SIDE

18
PARTS LOCATION ON P.C. BOARD
BOTTOM SIDE