Sharp CP-DK890N Service Manual

CD-DK890N

SERVICE MANUAL

No. S7838CDDK890N

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

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

CHAPTER 3. MECHANISM BLOCKS

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

[2]

Removing And Reinstalling The Main Parts

..... 3-4

CHAPTER 4. DIAGRAMS

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

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

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

CHAPTER 7. FLOWCHART

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

CHAPTER 8. OTHERS

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

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

PARTS GUIDE

MINI COMPONENT SYSTEM

CD-DK890N

MODEL

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

CONTENTS

iPod is a registered trademark of Apple Inc.

SHARP CORPORATION

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.

!

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

CD-DK890N

– i –

AudioXL-MP150Service ManualXLMP150MarketE

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing 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

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.

Description

Parts 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

"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.

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

CD-DK890N

–2

CHAPTER 1: GENERAL DESCRIPTION

(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.

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.

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

BEFORE RETURNING THE AUDIO PRODUCT

[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.

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

TEST PROBE

0.15 µ F

1.5k ohms
10W

VTVM

AC SCALE

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

TYPE F801, F802, F805 4A, 125V/
F803, F804 2.5A, 125V FUSES.

ATTENTION: POUR ASSURER
UNE LONGUE PROTECTION CONTRE
UN INCENDIE, REMPLACER SEULEMENT
PAR UN FUSIBLE DE

1 – 1

CD-DK890N

– 4

[3] Specifications

General

Power source AC 120 V ~ 60 Hz

Power consumption

105 W

Dimensions

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

Weight 16.32 lbs. (7.4 kg)

Amplifier

CD player

Tuner

Cassette deck

Speaker

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

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.

Output terminals Front Speakers: 6 ohms

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

Input terminals Audio In (audio signal):

250 mV/47 k ohms

Type 5-disc multi-play compact disc player

Signal readout Non-contact, 3-beam semiconductor laser

pickup

D/A converter 1-bit D/A converter

Frequency
response

20 - 20,000 Hz

Dynamic range 90 dB (1 kHz)

Frequency range

FM: 87.5 - 108.0 MHz

AM: 530 - 1,720 kHz

Frequency
response

50 - 14,000 Hz (normal tape)

Signal/noise ratio

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

Wow and flutter

0.3 % (WRMS)

Type

2-way type speaker system

2" (5 cm) tweeter

6 - 5/16" (16 cm) woofer

Maximum input
power

250 W

Rated input power 125 W

Impedance 6 ohms

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

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

Weight 7.0 lbs. (3.18 kg)/each

1 – 2

CD-DK890N

–2

[4] Names Of Parts

Front panel

1. iPod Terminal

2. Disc Trays

3. Timer Indicator

4. Power On/Stand-by Button

5. CD Button

6. Tape (1 2) Button

7. Tuner (Band) Button

8. Audio In/iPod Button

9. CD or Tape Stop Button

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

r

Preset Down, Time Down Button

11. Tuning Down, Cursor Down Button

12. Tape 1 Cassette Compartment

13. Headphone Jack

14. Audio In Jack

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

Display

Rear panel

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

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

Speaker system

1. Tweeter

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

TIMER

CD

4

3

1

5

4

5

3

2

1

PHONES

RECORD/PLAYBACK

PLAYBACK (PLAY & STOP)

2

AUDIO

IN

15

16
17

19
20
21

22

18

1

2

3

4
5
6
7

8

9
10
11
12

13

14

12

345 678

9

11 12 1

3

10

14

15

16 17

1

8

19

A

C INPUT

CINPUT

3

7

4

5

2

1

6

2

1

3

4

1 – 3

CD-DK890N

– 4

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

2

5

7
8

3
4

6

10
11

9

12
13

14

16

15

21

23

22

17

19

18

25

24

20

26

27

28

29

1 – 4

CD-DK890N

2 – 1

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

CHAPTER 2. ADJUSTMENTS

[1] Mechanism Section

• Driving Force Check

• Torque Check

• Tape Speed

Figure 1

Torque Meter Specified Value

Play: TW-2111 Tape 1: Over 75 g

Tape 2: Over 75 g

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

Test Tape Adjusting

Point

Specified

Value

Instrument

Connection

Normal
speed

MTT-111 Variable

Resistor in
motor.

3,000 ± 90 Hz
Speaker

Speaker
Terminal (Load
resistance:
6 ohms)

TAPE MECHANISM

Tape
Motor

Variable Resistor in motor

CD-DK890N

2 – 2

[2] CD Section

CD Error code description

* '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

th

times.

Standard Specification of Stereo System Error Message Display Contents

(*) 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.

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.

+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.

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.

Error Contents Display Notes

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

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

21: TRAY SW Detection NG during initialize process
CD DSP Communication Error. 'ER-CD31' DSP COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'

TUNER PLL Unlock. PLL Unlock.

FM 87.5 MHz

FLASHING

1 FRAME

OFF

OFF

OFF

OFF

(REPEAT)

ON
TIMER
LED

ON

NO. 1

NO. 2

NO. 1

NO. 2

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

FLASHING

Example : In case of speaker abnormal

CD-DK890N

4 – 1

CHAPTER 4. DIAGRAMS

[1] Main Block Diagrams

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

REC/PLAY

BIAS

T1/T2

IC101

AN7345K

PLAYBACK AND RECORD/

PLAYBACK AMP.

R

L

L

R

JKA701-AUDIO IN

Q104

Q101-

Q108

Q107

CLK

CE

DI

+B4

L

R

BIAS

T1/T2

MUTING

P.B.

REC.

AC BIAS

L

L

R

R

R

L

TAPE/
TUNER

IPOD

CD

P.B.

CNP3

FROM CD SECTION

HEAD

ERASE

SWITCHING

SWITCHING

SWITCHING

BIAS

Q113

Q114

Q112

Q110

SWITCHING

Q109

OSC

BIAS

Q111
L103

Q105
Q106

REC./P.B. HEAD

TAPE 2

P.B. HEAD

TAPE 1

R-CH

L-CH

IC601

LC75341M

AUDIO

PROCESSOR

TUNER
PACK
UNIT
RTUNSA016AWZZ

+B4

R

L

REC.

R

L

L NF

R NF

ALC

R REC.

L REC.

R NF

L NF

SWITCHING

L(T2)

R(T2)

R(T1)

L(T1)

4

22

3

24

2

1

81817

11

16

3

15

10

9

7

23

14

12
13

19

7

18

10

8

1 7

13

21

4

2

24

23

9

16

12

1

P.B

REC

T1/T2

21

R-CH

L-CH

TAPE

MECHANISM

ASS'Y

MOTOR
DRIVER

SOLENOID

DRIVER

+B7

+B7

IC701

IXA201AW

MICROCOMPUTER

(2/2)

38

BI601CNS601

1

1

2

3

4

5

6

7

8

9

10

11

3

4

1

3

2

Q703~

Q708

Q709~

Q711

+B4

NC

NO USE

CNP303

CE

DI

CL

DO

CHASIS_GND

L_CH

+9V

R_CH

TUN_SM

FM_DET

CHASIS_GND

9

1

8

13

1

1

11

2

8

12
13

4

3

1

7

5

8

6

17

12

11

+B6

+B11

+B10

JK691

IPOD SECTION

CNP102

VIDEO
OUT

SP_RLY

T_BIAS

V_OUT

iPOD_RXD

IC602

ICBA3121F

(ISOLATION GROUND)

iPOD_TXD

iPOD_PG

R

L

R

L

R

L

T_REC/PLAY

IC702

BU2092F

T_TI/T2

VDD

CD-DK890N

4 – 2

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

IC854

AN78L05

RELAY

DRIVER

D842 -

D845

+B5

+B10

+B11

UHSW_5.6V

IPOD_+5V

R860
10 ohm/
5 WATT

IPOD_3.3V

+B PROTECT

+B6

VL+

VLÐ

VHÐ

PT841

SUB POWER

TRANSFORMER

+B6

SW5V

D803

D863

IC851

AN80T53

VOLTAGE REGULATOR

D905

AC 120 V ~ 60 Hz

ÐVF

VF2

VF1

AC_RLY

Q801

+B3

+B7

+B4

+B8

D+5V

+B9 A_+5V

+B1

+B2

ÐB1

ÐB2

+B8

+B7

R

L

+B5

RX701

JOG701

JOG

VOLUME

SENSOR

REMOTE

D804

D802

D801

RL914

JK692

HEADPHONES

MOTOR
DRIVER

SPEAKER

RELAY

PT801

MAIN POWER

TRANSFORMER

M901

FAN MOTOR

SO902

SPEAKER

TERMINAL

M

Q906

Q905

Q712

Q713

Q904

Q901

Q903

Q902

D906
D907

2.5A/125V

F803

2.5A/125V

F804

4A/125V

F805

RL841

F801

4A/125V

F802

4A/125V

L-OUT

R-OUT

CLK

8.388 MHz

RESET

L-CH

R-CH

AC POWER

SUPPLY CORD

EC/PLAY

VLOAD

RESET

CP_SOMO

CP_CLK

CD_D0

CD_D1

CD_CLK

CD_CE

CP_SOMI

IPOD_DETECT

IPOD_TX
IPOD_RX

F1

F1

F2

F2

+B5

+B5

+B5

VDD

VDD

SP_RLY

VDD

SP. DET.

-

CE

DI

DO

XL701

-

BIAS

T1/T2

AVD D

PHOTO

SP_DET

REMO CON

SW707-SW716

SW701-SW705

KEY

SECTION

TO CD

T.F.

IC701

IXA201AW

SYSTEM

MICROCOMPUTER

FL DISPLAY

FL701

5150

27 4712 54

78

98

26

25

1

2

4

6

3334

11

7

8

2

5

6

VH+

1

3

3

7
2
6

1

1

14

18

99

79

1

2

3

100

17 1642 18 13 10 43 44 45 46

41

55 5

27

268

1415408

-

-

CONSTANT

VOLTAGE REGULATOR

LD+8V

M+13V
A+10V

+5V

IC901

---

57 77

-

IC901

STK412-410

POWER AMP.

Q841

BIAS

T1/T2

80

20

22

21

30 29 2831

32

9

18

+B5

+B5

P_RLY

F

VDD

1

1

3

2

3

IC852
KIA7805AP

IC892
AP2213M33E

CD-DK890N

4 – 3

[2] CD Block Diagrams

Figure 4-3: CD BLOCK DIAGRAM

18 1968

5251

74

7875

76 876521

37

26

20

40

32

24

25

22

23

54

55

56

77

71

67

57

73

72

49

48

47

46

45

44

43

PUIN

DRIVER

SPIN/SLIDE

FOCUS/TRACKING/

LA6261

IC2

VIN4

FWD6

VO6+

VO6-

VO5+

VO5-

REV6

VIN3

VIN2

PVCC1

SVCC

PVCC2

VCONT6

VCONT5

VIN1

REV5

REG IN

REG OUT

FWD5

IC1

LC78690E

CD SERVO

LCHO

RCHO

CONT1

CONT0

SLDO

SPDO

FDO

TDO

LDD

LDS

DIN

BIN

1413

FIN

EIN

CIN

AIN

LRVDD

XVDD

DVDD

DVDD

DVDD

36 41

AVD D

XIN

XOUT

INTB1

INTB0

66

38

DVDD 1.8

DVDD 1.8

RESB

DO

DI

CL

CE

TO DISPLAY SECTION

TO MAIN SECTION

CNP3

CNP7

M1

TRAY MOTOR

MGND

PICKUP UNIT

IN

PICKUP

NSW 1

+3.3V

MOTOR

SPINDLE

NM1

MOTOR

SLED

NM2

COIL

TRACKING

FOCUS COIL

16.9344 MHz

XL1

+7.5V

DRIVER

LASER

+3.3V

CONSTANT

VO LTAGE

+3.3V

+3.3V

Q1

R-CH

AGND

L-CH

D_+5V(+B5)

+5V

GND

PHOTO

MO_A-

CD_RES

MO_A+

CD_DI

CD_DO

CD_CLK

CD_CE

+

--

+7.5V

7

27

28

24

21

9

17151311

23

22

32 3331 34

30

19

20

26

8

10

4

56

Q2

Q3

3363521

7 1 2 3 4 5 6

10

MP3_INT11CD_INT12TRAY SW1/SW2

GND

RX1

SW3 TRAY SW2

SW2 TRAY SW1

SW1 CLAMP

SW4 DISC

PHOTO

5V

13

DISC/CLAMP

143 1 9 8 7 6 52 4

CNP4

10 113 1 9 8 7 6 52 4

53

M

M2

MAIN CAM

MOTOR

+

M

M

M

42

DGND

CD-DK890N

5 – 1

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms Of CD Circuit

IC1

IC1

IC1 IC1

IC1 IC1

IC1

IC1

IC1

IC1

IC1

IC1

1

22

23

2

22

25

22

16

28

22

27

2

RFOUT

1

7

6

5

1

3

1

4

FDO

TDO

FDO

SPDO

PDOUT 1

PDOUT 0

FDO

FDO

TE

TE

16

RFOUT

2

3

4

CD-DK890N

5 – 2

[2] Voltage

IC702

NO

VOLTAGE

VOLTAGE

VOLTAGEVOLTAGE

IC101(IPOD) IC602

IC892

PIN
NO

1 20.35

20.00

34.99

IC852

VOLTAGE

PIN PIN PIN

NO 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

NO

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

19 -0.15 7 0.00
20 -0.29 8 0.00

(V) (V)

(V) (V) (V)

(V)

(V)

VOLTAGE

PIN PIN

VOLTAGE

NO NO

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

IC701

CD-DK890N

5 – 3

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

PIN

NO

1 53.7
2 22.7
3 10.7
4 -10.7
5 -22.7

PIN

VOLTAGE

6 -53.7

NO

70

10

80

20

90

30

10 0

42

11 0

52

12 -52.2

6 1.32

13 52.4

70

14 0

8 0.6

15 0

9 3.48

16 -51

10 3.44

17 0

11 0

18 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

IC 901

VOLTAGE

IC101 (MAIN)

IC 601

VOLTAGE

IC 1

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

VOLTAGE

PIN

NO

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

IC 851

VOLTAGE

(V)

(V)(V)(V)

1.59

(V)

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

3.43

IC 2

Q 1

Q 2

Q 3

Q 4

VOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN

NO (V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN NOVOLTAGE

(V)

PIN
NO

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

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

CD-DK890N

5 – 4

-MEMO-

CD-DK890N

6 – 1

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.

[2] Types Of Transistor And LED

REF. NO DESCRIPTION POSITION

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

TAPE (1 2)

ON—OFF

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

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

REF. NO DESCRIPTION POSITION

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

B

(3)

E

(1)

C

(2)

TOP

VIEW

KDS184

TOP VIEW

TOP VIEW

KTA1271 Y
KTA1273 Y
KTA1274 Y
KIA78L05
KIA7805AP

VIEW

FRONT

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

MA111G
1N4004

HSS4148

DRL204F

D10XB60F

AC AC

VIEW

FRONT

FRONT
VIEW

SLR342VC

KTC3199 GR
KTC3200 GR
KTC3203 Y

CD-DK890N

6 – 2

[3] Schematic Diagram

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

MAIN PWB-A1

CD SIGNAL

AUDIO SIGNAL
iPOD SIGNAL

FM SIGNAL

PLAYBACK SIGNAL
RECORD SIGNAL

A

B

C

D

E

F

G

H

1

23456

CD-DK890N

6 – 3

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

7

8 9 10 11 12

CD-DK890N

6 – 4

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

WZX11AW

13

14 15 16 17 18

CD-DK890N

6 – 5

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

A

B

C

D

E

F

G

H

1

23456

CD-DK890N

6 – 6

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

7

8 9 10 11 12

CD-DK890N

6 – 7

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

WZX11AW

WZX21AW

13

14 15 16 17 18

CD-DK890N

6 – 8

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

FM SIGNAL

MAIN PWB-A1

A

B

C

D

E

F

G

H

1

23456

CD-DK890N

6 – 9

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

TO HEADPHONE

SECTION

CNP805
CMO36B

POWER PWB-A2

7

8 9 10 11 12

CD-DK890N

6 – 10

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

iPOD TRANSIT PWB-B3

DISPLAY PWB-B1

TO IPOD TRANSIT PWB

AUDIO SIGNAL

A

B

C

D

E

F

G

H

1

23456

CD-DK890N

6 – 11

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

NC

NCNCNC

7

8 9 10 11 12

CD-DK890N

6 – 12

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

NC

13

14 15 16 17 18