SHARP cd dk890n Diagram

CD-DK890N

SERVICE MANUAL

No. S7838CDDK890N

MINI COMPONENT SYSTEM

iPod is a registered trademark of Apple Inc.

CONTENTS

PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION

[1] Important Service Safety Precaution.............. 1-1

[2] Important Service Notes (for U.S.A only)........ 1-1

[3] Specifications ................................................. 1-2

[4] Name Of Parts ............................................... 1-3

CHAPTER 2. ADJUSTMENTS

[1] Mechanism Section........................................ 2-1

[2] Test Mode....................................................... 2-2

[3] CD Section..................................................... 2-4

MODEL

CD-DK890N Mini Component System consisting of
CD-DK890N (main unit), CP-DK890N (speaker system).

• In the interests of user-safety the set should be restored
to its original condition and only parts identical to those
specified be used.

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms Of CD Circuit ..............................5-1

[2] Voltage...........................................................5-2

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT

[1] Notes On Schematic Diagram .......................6-1

[2] Types Of Transistor And LED ........................ 6-1

[3] Schematic Diagram .......................................6-2

[4] Charts Of Connecting Wires .......................6-22

[5] Wiring Side Of PWB ....................................6-24

CD-DK890N

CHAPTER 3. MECHANISM BLOCKS

[1] Caution On Disassembly................................ 3-1

[2]

Removing And Reinstalling The Main Parts

CHAPTER 4. DIAGRAMS

[1] Main Block Diagrams ..................................... 4-1

[2] CD Block Diagrams....................................... 4-3

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.

!

..... 3-4

SHARP CORPORATION

CHAPTER 7. FLOWCHART

[1] Troubleshooting.............................................7-1

CHAPTER 8. OTHERS

[1] Function Table Of IC......................................8-1

[2] FL Display......................................................8-8

PARTS GUIDE

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-DK890N

AudioXL-MP150Service ManualXLMP150MarketE

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN, POWER, DISPLAY, AUDIO IN, iPOD TRANSIT, iPOD, CD PWB" of this model employs lead-free solder.
The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals. The alphabetical character
following LF shows the type of lead-free solder.

Example:

Indicates lead-free solder of tin, silver and copper.

2. Using lead-free wire solder

When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire
solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend you to
use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our
service station or service branch in your area.

3. Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead solder
by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for

extended period of time. However, since the land may be peeled of for the maximum heat-resistance temperature
of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after
every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Ref No.

PWB-A 92LPWB7312MANS MAIN (A1), POWER (A2)

PWB-B 92LPWB7312DPLS DISPLAY (B1), AUDIO IN (B2), iPOD TRANSIT (B3)

PWB-C 92LPWB7312PODS iPOD

PWB-D 92LPWB6700CDUS CD

Parts No.

Description

– i –

CD-DK890N

CHAPTER 1: GENERAL DESCRIPTION

[1] Important Service Safety Precaution

CAUTION : “These servicing instructions are for use by qualified service personnel only. To reduce
the risk of electric shock do not perform any servicing other than that contained in the operating
instructions unless you are qualified to do so”.

WARNING

1. For continued safety, no modification of any circuit should be
attempted.

2. Disconnect AC power before servicing.

CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH
SAME TYPE F801, F802, F805 4A, 125V/
F80, F804 2.5A, 125V FUSES.

ATTENTION: POUR ASSURER
UNE LONGUE PROTECTION CONTRE
UN INCENDIE, REMPLACER SEULEMENT
PAR UN FUSIBLE DE
TYPE F801, F802, F805 4A, 125V/
F803, F804 2.5A, 125V FUSES.

[2] Important Service Notes (for U.S.A only)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)

Before returning the audio product to the user, perform
the following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the
chassis and other metal parts in the audio product.

2. Inspect all protective devices such as insulating
materials, cabinet, terminal board, adjustment and
compartment covers or shields, mechanical insulators
etc.

3. To be sure that no shock hazard exists, check for
leakage current in the following manner.

Plug the AC line cord directly into a 120 volt AC outlet.

*
* Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as conduit or electrical ground
connected to earth ground.

Use a VTVM or VOM with 1000 ohm per volt, or

*

higher, sensitivity to measure the AC voltage drop
across the resistor (See diagram).

* Connect the resistor connection to all exposed metal

parts having a return path to the chassis (antenna,
metal cabinet, screw heads, knobs and control shafts,
escutcheon, etc.) and measure the AC voltage drop
across the resistor.

VTVM

AC SCALE

1.5k ohms
10W

0.15 µ F

TEST PROBE
TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

All check must be repeated with the AC line cord plug
connection reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2
milliamp. AC.) Or more is excessive and indicates a
potential shock hazard which must be corrected before
returning the audio product to the owner.

1 – 1

–2

CD-DK890N

[3] Specifications

General

Power source AC 120 V ~ 60 Hz

Power consumption

Dimensions

Weight 16.32 lbs. (7.4 kg)

Amplifier

Output power RMS : Total 250 W (125 W per channel into

Output terminals Front Speakers: 6 ohms

Input terminals Audio In (audio signal):

CD player

Type 5-disc multi-play compact disc player

Signal readout Non-contact, 3-beam semiconductor laser

D/A converter 1-bit D/A converter

Frequency
response

Dynamic range 90 dB (1 kHz)

105 W

Width: 10 - 1/4" (260 mm)
Height: 13" (342.7 mm)
Depth: 12 - 7/8" (324 mm)

6 ohms at 1 kHz, 10% Total
harmonic distortion.)
FTC : 90 W minimum RMS per channel
into 6 ohms from 100 Hz to 20 kHz,
10% Total harmonic distortion.

Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Video output: 1Vp-p

250 mV/47 k ohms

pickup

20 - 20,000 Hz

Tuner

Frequency range

FM: 87.5 - 108.0 MHz

AM: 530 - 1,720 kHz

Cassette deck

Frequency
response

Signal/noise ratio

Wow and flutter

50 - 14,000 Hz (normal tape)

55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

Speaker

Type

Maximum input
power

Rated input power 125 W

Impedance 6 ohms

Dimensions Width: 7 - 7/8" (200 mm)

Weight 7.0 lbs. (3.18 kg)/each

2-way type speaker system

2" (5 cm) tweeter

6 - 5/16" (16 cm) woofer

250 W

Height: 13" (330 mm)
Depth: 8 - 11/16" (220.5 mm)

1 – 2

– 4

[4] Names Of Parts

r

A

CINPUT

1

5

4

3

2

1

TIMER

CD

PLAYBACK (PLAY & STOP)

AUDIO

PHONES

10
11
12

13

14

2

3

4
5
6

7
8

9

CD-DK890N

Front panel

1. iPod Terminal

2. Disc Trays

3. Timer Indicator

4. Power On/Stand-by Button

15

5. CD Button

6. Tape (1 2) Button

7. Tuner (Band) Button

16

8. Audio In/iPod Button

17

5

4

3

2

1

RECORD/PLAYBACK

IN

18

9. CD or Tape Stop Button

19

10. CD Track Down or Fast Reverse, Tape 2 Rewind, Tune
Preset Down, Time Down Button

20

11. Tuning Down, Cursor Down Button

21

12. Tape 1 Cassette Compartment

13. Headphone Jack

14. Audio In Jack

22

15. Remote Sensor

16. Volume Control

17. CD, iPod Play or Pause,
Tape Play Button

18. Disc Tray Open/Close Button

19. Disc Number Select Buttons

20. CD Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button

21. Tuning Up, Cursor Up Button

22. Tape 2 Cassette Compartment

12

1

2

345 678

16 17

11 12 1

10

8

1

19

9

3

14

15

3
4

5

6

C INPUT

7

Display

1. Disc Number Indicators

2. MP3/WMA Folder Indicator

3. MP3/WMA Title Indicators

4. MP3 Indicator

5. WMA Indicator

6. Sleep Indicator

7. Timer Play Indicator

8. Timer Recording Indicator

9. Tape 2 Record Indicator

10. MP3/WMA Total Indicator

11. Daily Timer Indicator

12. FM Stereo Mode Indicator

13. FM Stereo Receiving Indicator

14.Tape Play Indicator

15. Memory Indicator

16. Extra Bass Indicator

17. Disc Repeat Play Indicator

18. Disc Pause Indicator

19. Disc Play Indicator

Rear panel

1. Cooling Fan

2. AC Power Cord

3. FM 75 Ohms Antenna Jack

4. AM Antenna Ground Terminal

5. AM Loop Antenna Terminal

6. Video Out Jack

7. Front Speaker Terminals

1

3

Speaker system

1. Tweeter

2

4

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

1 – 3

–2

CD-DK890N

1

17

9

10

2

11

18

19

21

22

23

24

12
13

20

25

3
4

14
15

5

26

27

28

29

6

7

16

8

Remote control

1. Remote Control Transmitter

2. Disc Number Select Buttons

3. Tuning Up, Cursor Up Button

4. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down, Cursor Left Button

5. Clock/Timer Button

6. Character Input/Disc Direct Search Buttons

7. Equalizer Mode Select Button

8. Extra Bass/Demo Button

9. On/Stand-by Button

10. CD Button

11. Tuner (Band) Button

12. Tape (1 2) Button

13. Audio In/iPod Button

14. Disc Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up, Cursor Right Button

15. Tuning Down, Cursor Down Button

16. Volume Up and Down Buttons

17. Clear/Dimmer, iPod MENU Button

18. Play Mode Button

19. Disc Stop Button

20. Tape Stop Button

21. Memory, iPod ENTER Button

22. iPod Play/Pause Button

23. Disc Play/Pause Button

24. Tape Play Button

25. Tape 2 Record Pause Button

26. MP3/WMA Navigation Mode Select Button

27. Character Button

28. Display Button

29. Enter Button

1 – 4

– 4

CD-ES700/CD-ES77CD-ES700/CD-ES77Service ManualCD-ES700/CD-ES77MarketE

CHAPTER 2. ADJUSTMENTS

[1] Mechanism Section

• Driving Force Check

Torque Meter Specified Value

Play: TW-2111 Tape 1: Over 75 g

Tape 2: Over 75 g

• Torque Check

Torque Meter Specified Value

Tape 1 Tape 2
Play: TW-2111 25 to 85 g.cm 25 to 85 g.cm
FF/REW — 45 to 195 g.cm
BACK TENSION 1.2 to 7.0 g.cm 1.2 to 7.0 g.cm

• Tape Speed

CD-DK890N

Test Tape Adjusting

Normal
speed

Figure 1

MTT-111 Variable

Tape
Motor

Point

Resistor in
motor.

TAPE MECHANISM

Specified

Value

3,000 ± 90 Hz
Speaker

Variable Resistor in motor

Instrument

Connection

Speaker
Terminal (Load
resistance:
6 ohms)

2 – 1

CD-DK890N

[2] CD Section

CD Error code description

Error Explanation

10* CAM error. Can't detect CAM switch when CAM is moving.
11* When it detect cam operation error during initialize process.
20* TRAY error. Can't detect TRAY switch when TRAY is moving.
21* When it detect TRAY operation error during initialize process.

31 When it change to CD function, DSP cannot read initial data.

* 'CHECKING'

If Error is detected, 'CHECKING' will be displayed instead of 'ER-CD**'. 'ER-CD**' display will only be displayed
when error had been detected for the 5

Standard Specification of Stereo System Error Message Display Contents

Error Contents Display Notes

CD CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation

CD DSP Communication Error. 'ER-CD31' DSP COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'

TUNER PLL Unlock. PLL Unlock.

(*) CHECKING:

If CD changer mechanism error is detected, 'CHECKING' will be display instead of 'ER-CD**'. 'ER-CD**' display will
only be display when error had been detected for the 5

th

times.

FM 87.5 MHz

11: CAM SW Detection NG during initialize process
20: TRAY SW Detection NG during normal operation
21: TRAY SW Detection NG during initialize process

th

times.

Speaker abnormal detection and +B PROTECTION display

In case speaker abnormal detection or +B PROTECTION had occurred, the unit will automatically enter to stand - by
mode and Timer indicator will be flashing as below.

Example : In case of speaker abnormal

ON

FLASHING

ON

FLASHING

TIMER
LED

OFF

NO. 1

OFF

NO. 2

1 FRAME

OFF

NO. 1

OFF

NO. 2

(REPEAT)

NO.1 : +B Protection
NO.2 : Speaker abnormal

+B PROTECTION is condition when irregular process occur on power supply line.

BEFORE TRANSPORTING THE UNIT

The following process need to be taken after set tapering/parts replacement.

1. Press the ON/STAND-BY button to enter stand-by mode.

2. While pressing down the button and the button, press the ON/STAND-BY button. The Micro Computer
version number will be displayed as "CP*1001".

3. Press button until "WAIT"→ "FINISHED" appears.

4. Unplug the AC cord and the unit is ready for transporting.

2 – 2

CD-DK890N

8

CHAPTER 4. DIAGRAMS

[1] Main Block Diagrams

CHASIS_GND

11

10

9

8

7

6

5

4

3

2

1

CNP303

FM_DET

TUN_SM

R_CH

+9V

L_CH

CHASIS_GND

DO

CL

DI

CE

VIDEO
OUT

NC

NO USE

+B4

JK691

+B10

TUNER
PACK
UNIT
RTUNSA016AWZZ

IPOD SECTION

2

8

V_OUT

CNP102

iPOD_RXD

iPOD_TXD

iPOD_PG

1

11

12
13

4

6

IC702

BU2092F

9

T_BIAS

11

T_REC/PLAY

12

13

T_TI/T2

+B11

R

L

SP_RLY

VDD

1

17

1

+B7

+B7

FROM CD SECTION

TAPE 1

P.B. HEAD

TAPE 2

REC./P.B. HEAD

CNP3

L-CH
R-CH

L-CH
R-CH

ERASE

HEAD

MOTOR
DRIVER

Q709~

Q711

Q703~

Q708

SOLENOID

DRIVER

REC.

P.B.

AC BIAS

1

2

3

SWITCHING

Q101­Q104

BIAS

MECHANISM

BI601CNS601

SWITCHING

Q105
Q106

Q111
L103

OSC

TAPE

ASS'Y

1

3

4

L(T1)

R(T1)

L(T2)

R(T2)

L NF

R NF

L REC.

R REC.

Q112

1

24

2

23

3

22

REC

9

16

12

SWITCHING

Q114

SWITCHING

JKA701-AUDIO IN

R
L

TAPE/
TUNER

+B4

13

P.B

4

L

P.B.

R

21

7

REC.

L
R

18

8

L NF

1 7

R NF

ALC

10

T1/T2

19

PLAYBACK AND RECORD/

IC101

AN7345K

PLAYBACK AMP.

Q113

SWITCHING

Q109

BIAS

Q110

L

R

(ISOLATION GROUND)

9

L

16

R

10

L

15

R

IPOD

11

L

14

R

12

L

CD

13

R

1

7

IC602

ICBA3121F

3

5

8

+B4

23

IC601

LC75341M

AUDIO

PROCESSOR

81817

7

3

MUTING

IXA201AW

MICROCOMPUTER

L

R

Q107
Q108

+B6

DI

CE

CLK

IC701

(2/2)

1

2

24

21

R

4

L

REC/PLAY

T1/T2

T1/T2

BIAS

BIAS

38

Figure 4-1: MAIN BLOCK DIAGRAM (1/2)

4 – 1

F

P_RLY

VDD

CD-DK890N

FL701

F1

F1

9

18

+B5

98

-

78

80

20

21
22

99

-

100

+B5

SP. DET.

D905
D906
D907

FL DISPLAY

57 77

-

VLOAD

IPOD_DETECT

IPOD_TX
IPOD_RX

VDD

79

268

27 4712 54

---

30 29 2831

1415408

CD_D0

IC701

IXA201AW

SYSTEM

MICROCOMPUTER

CP_SOMO

CP_SOMI

RESET

17 1642 18 13 10 43 44 45 46

3334

XL701

8.388 MHz

Q712

RESET

CD_D1

CD_CLK

CP_CLK

32

F2

CD_CE

VDD

+B5

5150

+B5

41

F2

VDD

55 5

REMO CON

SP_RLY

CE

-

SP_DET

PHOTO

AVD D

CLK

DI

DO

JOG701

JOG

VOLUME

RX701

SW701-SW705
SW707-SW716

+B PROTECT

+B6

+B7

MOTOR
DRIVER

Q906

REMOTE

3

SENSOR

2

KEY

TO CD

SECTION

1

+B5

JK692

HEADPHONES

+B8

M

FAN MOTOR

M901

27

26

Q713

25

+B5

1

4

-

2

6

EC/PLAY

T1/T2

T1/T2

BIAS

BIAS

L

R

VOLTAGE REGULATOR

+B3

+B7

+B4

+B9 A_+5V

+B6

SW5V

+B8

D+5V

VF2

ÐVF

VF1

UHSW_5.6V

+B5

VOLTAGE REGULATOR

+B10

3

AN78L05

CONSTANT

AC_RLY

IPOD_+5V

IC854

18

14

IC901

VHÐ

VLÐ

6

VL+

5

2

ÐB1

IC851

AN80T53

7
2
6

1

1

IC852

3

KIA7805AP

1

+B1

LD+8V

M+13V
A+10V

+5V

VH+

+B2

D863

8

11

7

ÐB2

DRIVER

Q901
Q902
Q903
Q904

R-OUT
L-OUT

3

RELAY

1

STK412-410

POWER AMP.

D801

D802

D804

D803

Q801

Q841

IC901

D842 -

D845

R860
10 ohm/
5 WATT

F802

4A/125V

F801

4A/125V

F804

2.5A/125V
F803

2.5A/125V

PT841

SUB POWER

TRANSFORMER

T.F.

RL914

MAIN POWER

TRANSFORMER

Q905

SPEAKER

RELAY

PT801

4A/125V

RL841

R-CH

F805

AC POWER

SUPPLY CORD

AC 120 V ~ 60 Hz

L-CH

SO902

SPEAKER

TERMINAL

IPOD_3.3V

+B11

IC892

3

AP2213M33E

1
2

Figure 4-2: MAIN BLOCK DIAGRAM (2/2)

4 – 2

CD-DK890N

[2] CD Block Diagrams

XL1

16.9344 MHz

+3.3V

CONSTANT

VO LTAGE

TO MAIN SECTION

R-CH

AGND

L-CH

CE

43

CL

44

DI

45

DO

46

RESB

47

INTB0

48

INTB1

49

DVDD 1.8

38

DVDD 1.8

66

XOUT

72

XIN

73

DVDD

AVD D

36 41

+3.3V

D_+5V(+B5)

MGND

DGND

7875

LCHO

RCHO

DVDD

DVDD

+7.5V

7 1 2 3 4 5 6

CNP3

LC78690E

CD SERVO

LRVDD

XVDD

74

76 876521

+5V

IC1

Q1

+3.3V

TO DISPLAY SECTION

GND

PHOTO

MO_A-

MO_A+

DIN

BIN

EIN

CIN

AIN

LASER

DRIVER

CD_RES

CD_CLK

5251

CONT1

CONT0

FIN

1413

CD_DI

CD_DO

LDS

10

18 1968

MP3_INT11CD_INT12TRAY SW1/SW2

CD_CE

13

77

71

67

57

56

55

54

53

42

40

37

26

20

PUIN

32

24

SLDO

SPDO

25

FDO

22

23

TDO

LDD

DISC/CLAMP

143 1 9 8 7 6 52 4

CNP7

+7.5V

PHOTO

SW1 CLAMP

SW4 DISC

RX1

17151311

22

VIN4

VIN3

REV6

5V

23

FWD6

GND

SW3 TRAY SW2

SW2 TRAY SW1

VIN1

VIN2

IC2

LA6261

FOCUS/TRACKING/

9

27

28

24

21

SPIN/SLIDE

PVCC1

SVCC

PVCC2

VCONT6

VCONT5

DRIVER

3363521

M1

M2

MAIN CAM

TRAY MOTOR

M

M

+

+

--

10 113 1 9 8 7 6 52 4

32 3331 34

VO6-

VO6+

VO5+

FWD5

REV5

REG IN

REG OUT

4

56

MOTOR

CNP4

VO5-

19

20

30

7

26

8

10

Q2

+3.3V

COIL

TRACKING

PICKUP UNIT

FOCUS COIL

NM1

SPINDLE

MOTOR

NM2

SLED

MOTOR

M

M

NSW 1

PICKUP

IN

Q3

Figure 4-3: CD BLOCK DIAGRAM

4 – 3

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms Of CD Circuit

CD-DK890N

1

IC1

22

FDO

1

IC1

2

IC1 IC1

1

IC1 IC1

23

22

TDO

FDO

5

6

7

IC1

3

IC1

16

TE

1

IC1

22

25

28

27

22

FDO

SPDO

PDOUT 0

PDOUT 1

FDO

3

IC1

4

IC1

16

TE

4

2

IC1

2

RFOUT

RFOUT

5 – 1

CD-DK890N

[2] Voltage

IC701

PIN PIN

VOLTAGE

NO NO

(V) (V)

1 4.91 51 -0.20
2 4.90 52 4.54
3 4.90 53 4.54
4 4.90 54 0.00
5 5.00 55 0.00
6 3.83 56 0.00
7 5.07 57 0.00
8 6.02 58 -29.43

9 5.07 59 -29.43
10 5.07 60 -29.43
11 5.07 61 -29.43
12 1.40 62 -29.43
13 1.40 63 -29.43
14 0.00 64 -29.43
15 0.00 65 -29.43
16 2.17 66 -29.43
17 2.60 67 -29.43
18 4.57 68 -29.43
19 0.00 69 -29.43
20 4.88 70 -26.56
21 1.30 71 -29.43
22 4.08 72 -29.43
23 3.90 73 -18.68
24 1.77 74 -26.56
25 5.04 75 -26.71
26 5.05 76 -21.36
27 4.77 77 0.00
28 0.17 78 -0.16
29 4.50 79 4.56
30 4.50 80 -29.57
31 1.32 81 -16.00
32 0.00 82 -26.75
33 0.00 83 -18.70
34 5.07 84 -23.91
35 4.03 85 -23.53
36 1.97 86 -29.04
37 0.31 87 -20.82
38 1.99 88 -15.57
39 -0.59 89 -26.33
40 0.00 90 -26.27
41 4.57 91 -26.28
42 4.71 92 -26.28
43 0.00 93 -26.28
44 0.00 94 -26.28
45 0.00 95 -26.28
46 5.06 96 -26.28
47 4.93 97 -26.28
48 1.35 98 -26.28
49 1.36 99 -26.28
50 4.56 100 -26.09

VOLTAGE

IC702

PIN PIN PIN

PIN
NO

(V) (V) (V)

NO

1 0.00 1 0.18 1 2.94
2 0.00 2 0.00 2 2.91
3 0.00 3 0.66 3 2.90
4 0.00 4 2.12 4 0.00
5 0.00 5 1.34 5 2.90
6 0.00 6 0.00 6 2.90
7 0.00 7 -0.15 7 2.95
8 0.00 8 -0.21 8 5.08

91.55 9-0.31
10 1.24 10 -0.36
11 0.00 11 0.00 PIN
12 1.90 12 0.13
13 1.04 13 1.94 1 4.99
14 12.98 14 0.13 2 4.99
15 12.98 15 -0.22 3 3.41
16 12.91 16 0.00 4 2.10
17 0.00 17 -0.31 5 0.00
18 4.88 18 0.00 6 0.00

IC852

VOLTAGE

(V)

1 20.35

20.00

34.99

IC101(IPOD) IC602

NO

VOLTAGE

IC892

VOLTAGE

(V)

VOLTAGEVOLTAGE

NO NO

19 -0.15 7 0.00
20 -0.29 8 0.00

5 – 2

CD-DK890N

IC 1

IC 2

Q 1

Q 2

Q 3

Q 4

PIN NOVOLTAGE

1 21 3.24 41 3.13 61 1.55
2 0.47 22 1.62 42 0.01 62 1.93
3 0.39 23 1.63 43 0.05 63 1.93
4 2.79 24 1.62 44 2.93 64 1.93
5 1.63 25 1.64 45 2.88 65 0.00
6 1.63 26 0.00 46 1.87 66 1.81
7 1.63 27 0.33 47 3.13 67 0.00
8 1.63 28 1.62 48 3.13 68 3.13

9 1.63 29 1.10 49 3.13 69 0.03
10 1.63 30 3.05 50 0.00 70 0.02
11 1.64 31 0.00 51 3.12 71 0.01
12 0.00 32 3.26 52 3.12 72 1.34
13 1.63 33 0.03 53 0.00 73 1.53
14 1.63 34 0.03 54 0.00 74 3.01
15 1.62 35 0.03 55 0.00 75 1.54
16 1.64 36 3.26 56 0.00 76 3.23
17 1.63 37 0.02 57 0.00 77 0.00
18 3.27 38 1.81 58 0.00 78 1.59
19 0.00 39 2.56 59 1.58 79 3.24
20 0.00 40 0.00 60 1.57 80 1.59

PIN

NO (V)

1 10 3.28 19 4.51 28 7.64

2 3.50 11 1.65 20 4.50 29 7.58

3 3.44 12 1.65 21 3.45 30 0.00

4 3.48 13 1.65 22 3.10 31 0.00

5 3.44 14 1.65 23 3.10 32 0.00

6 3.49 15 1.65 24 3.09 33 0.00

7 0.00 16 1.65 25 1.65 34 0.00

8 4.20 17 1.65 26 0.02 35 3.49

9 7.63 18 1.65 27 7.64 36 3.45

(V)

1.59

VOLTAGE

3.43

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

E 3.26 E 4.86 E 1.81 E 0.00
C 0.10 C 3.27 C 3.26 C 3.28
B 3.23 B 4.19 B 2.33 B 0.00

PIN

NO

10
20
30
4 4.98
5 4.95
6 4.96
7 4.99
8 4.96
9 4.96

10 4.99
11 4.96
12 4.96
13 4.96
14 4.96
15 4.96
16 4.96
17 4.99
18 4.96
19 4.96
20 4.96
21 4.96
22 4.98
23 9.95
24 0

(V)

IC 601

VOLTAGE

PIN NOVOLTAGE

PIN

NO

1 53.7
2 22.7
3 10.7
4 -10.7
5 -22.7
6 -53.7
70
80

90
10 0
11 0
12 -52.2
13 52.4
14 0
15 0
16 -51
17 0
18 0

(V)

IC 901

VOLTAGE

VOLTAGE

PIN
NO

IC101 (MAIN)

PIN

NO

10
20
30
42
52
6 1.32
70
8 0.6

9 3.48
10 3.44
11 0
12 0
13 6.9
14 4.18
15 0
16 3.45
17 0.6
18 0
19 2.59
20 2
21 2
22 0
23 0
24 0

(V)

VOLTAGE

(V)(V)(V)

PIN NOVOLTAGE

IC 851

PIN

VOLTAGE

NO

1 5.06
2 12.83
3 19.6
40
5 18.28
6 9.92
7 8.4

(V)

(V)

5 – 3

CD-DK890N

-MEMO-

5 – 4

CD-DK890N

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Notes On Schematic Diagram

• Resistor:

To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the resis­tor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.

• Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• Schematic diagram and Wiring Side of P.W.Board
for this model are subject to change for improve­ment without prior notice.

• The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.

1. In the tuner section,
indicates AM
indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.
( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ “ ( ) are impor-

tant for maintaining the safety of the set. Be sure to
replace these parts with specified ones for maintain­ing the safety and performance of the set.

REF. NO DESCRIPTION POSITION

JOG701 VOLUME MAX—MIN
SW701 POWER ON /STAND-BY ON—OFF
SW702 CD ON—OFF
SW703

SW704 TUNER (BAND) ON—OFF
SW705 PLAY/PAUSE ON—OFF
SW706 STOP ON—OFF
SW707 FAST REWIND/PRESET DOWN ON—OFF
SW708 TUNING DOWN ON—OFF

TAPE (1 2)

ON—OFF

[2] Types Of Transistor And LED

FRONT

E C B
(S)(G)(D)
(1)(2)(3)

KTA1271 Y
KTA1273 Y
KTA1274 Y

VIEW

KTC3199 GR
KTC3200 GR
KTC3203 Y

B

(3)

E

(1)

KIA78L05
KIA7805AP

REF. NO DESCRIPTION POSITION

SW709 FAST FORWARD/PRESET UP ON—OFF
SW710 OPEN/CLOSE ON—OFF
SW711 DISC 5 ON—OFF
SW712 DISC 4 ON—OFF
SW713 DISC 3 ON—OFF
SW714 DISC 2 ON—OFF
SW715 DISC 1 ON—OFF
SW716 TUNING UP ON—OFF
SW717 AUDIO IN/IPOD ON—OFF

TOP

VIEW

KTA1504 GR
KRA107 S
KRC102 S
KRC104 S
KTA1504 Y
KTC3875 GR
KRC107S

C

(2)

TOP VIEW

MA111G
1N4004

DRL204F

HSS4148

TOP VIEW

KDS184

FRONT

VIEW

AC AC

D10XB60F

6 – 1

FRONT
VIEW

SLR342VC

CD-DK890N

[3] Schematic Diagram

A

B

C

MAIN PWB-A1

FM SIGNAL

CD SIGNAL

AUDIO SIGNAL
iPOD SIGNAL

PLAYBACK SIGNAL
RECORD SIGNAL

D

E

F

G

H

1

23456

Figure 6-1: MAIN SCHEMATIC DIAGRAM (1/6)

6 – 2

CD-DK890N

7

8 9 10 11 12

Figure 6-2: MAIN SCHEMATIC DIAGRAM (2/6)

6 – 3

CD-DK890N

13

WZX11AW

14 15 16 17 18

Figure 6-3: MAIN SCHEMATIC DIAGRAM (3/6)

6 – 4

CD-DK890N

A

B

C

D

E

F

G

H

1

23456

Figure 6-4: MAIN SCHEMATIC DIAGRAM (4/6)

6 – 5

CD-DK890N

7

8 9 10 11 12

Figure 6-5: MAIN SCHEMATIC DIAGRAM (5/6)

6 – 6

WZX11AW

CD-DK890N

13

WZX21AW

14 15 16 17 18

Figure 6-6: MAIN SCHEMATIC DIAGRAM (6/6)

6 – 7

CD-DK890N

A

B

FM SIGNAL

MAIN PWB-A1

C

D

E

F

G

H

1

23456

Figure 6-7: POWER SCHEMATIC DIAGRAM (1/2)

6 – 8

TO HEADPHONE

SECTION

CD-DK890N

CNP805
CMO36B

POWER PWB-A2

7

8 9 10 11 12

Figure 6-8: POWER SCHEMATIC DIAGRAM (2/2)

6 – 9

CD-DK890N

A

B

iPOD TRANSIT PWB-B3

C

DISPLAY PWB-B1

D

E

TO IPOD TRANSIT PWB

F

G

H

AUDIO SIGNAL

1

23456

Figure 6-9: DISPLAY SCHEMATIC DIAGRAM (1/6)

6 – 10

CD-DK890N

NC

7

8 9 10 11 12

NCNCNC

Figure 6-10: DISPLAY SCHEMATIC DIAGRAM (2/6)

6 – 11

CD-DK890N

13

NC

14 15 16 17 18

Figure 6-11: DISPLAY SCHEMATIC DIAGRAM (3/6)

6 – 12