Sharp XLDK-227-NH Service manual

XL-DK227NH

SERVICE MANUAL

No. S5823XLK227NH

MICRO COMPONENT SYSTEM

DIO U A

N I

CONTENTS

PRECAUTIONS FOR USING LEAD-FREE SOLDER

CHAPTER 1. GENERAL DESCRIPTION

[1] Safety Precaution For Service Manual.............1-1

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

[3] Name Of Parts................................................... 1-2

CHAPTER 2. ADJUSTMENTS

[1] CD Section ..................................................2-1

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

[3] Standard Specification Of Ster eo System

Error Message Display Contents.................2-4

CHAPTER 3. MECHANICAL DESCRIPTION

[1] Removing And Reinstalling The Main Parts

..................................................................... 3-1

[2] Disassembly ................................................3-2

CHAPTER 4. DIAGRAMS

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

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

MODEL

XL-DK227NH Micro Component System consisting of XL-DK227NH (main unit) and CP-DK227NH (speaker system).

• In the interests of user-safety (Required by safety regulations in some countries) 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 Servo 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......................6-26

[5] Wiring Side of PWB...................................6-28

CHAPTER 7. FLOWCHART

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

CHAPTER 8. OTHER

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

[2] FL Display..................................................8-13

PARTS GUIDE

XL-DK227NH

iPod is a trademark of Apple Inc., registered in the U.S. and other countries.

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.

SHARP CORPORATION

– 1

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

XL-DK227NH

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN, POWER, AMPLIFIER, HEADPHONE, MICOM REFLASH, DISPLAY, SPEAKER, VOLUME LED LIGHT UP, 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, were commend you to use a dedicated soldring bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or ser vice 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 wet ability, 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 off or 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 PWB-B PWB-C PWB-D 92LPWB7121CDUS

Parts No.

92LPWB7129MANS 92LPWB7121DPLS 92LPWB7129PODS

MAIN (A1), POWER (A2), AMPLIFIER (A3) , HEADPHONE (A4), MICOM REFLASH (A5) DISPLAY (B1), SPEAKER (B2), VOLUME LED LIGHT UP (B3) iPOD CD

Description

– 2

XL-DK227NH

CHAPTER 1. GENERAL DESCRIPTION

[1]

Safety Precaution For Service Manual

WARNINGS

THE AEL (ACCESSIBLE EMISSION LEVEL) OF LASER POWER OUTPUT FOR THIS MODEL IS SPECIFIED TO BE LOWER THAN CLASS I REQUIREMENTS. HOWEVER, THE FOLLOWING PRECAUTIONS MUST BE OBSERVED DURING SERVICING TO PROTECT YOUR EYES AGAINTS EXPOSURE TO THE LASER BEAM.

1- WHEN THE CABINET HAS BEEN REMOVED, THE POWER IS TURNED ON WITHOUT A COMPACT DISC,

AND THE PICKUP IS ON A POSITION OUTER THAN THE LEAD-IN POSITION, THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT LOOK INTO THE PICKUP LENS.

2- THE LASER POWER OUTPUT OF THE PICKUP INSIDE THE UNIT AND REPLACEMENT SERVICE PARTS

HAVE ALREADY BEEN ADJUSTED PRIOR TO SHIPPING.

3- NO ADJUSTMENT TO THE LASER POWER SHOULD BE ATTEMPTED WHEN REPLACING OR SERVICING

THE PICKUP. 4- UNDER NO CIRCUMSTANCES LOOK DIRECTLY INTO THE PICKUP LENS AT ANY TIME. 5- CAUTION - USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN

THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

This product is classified as a CLASS 1 LASER PRODUCT.

[2] Specifications

General

Power source AC 220 - 240 V ~ 50 Hz Power consumption Power on: 40 W

Power stand-by: 0.6 W (*)

Dimensions Width: 180 mm (7 - 1/16")

Height: 260 mm (10 - 2/8") Depth: 273 mm (10 - 6/8")

Weight 4.1 kg (9 lbs.)

( * )This power consumption value is obtained when the

demonstration mode is cancelled in the power stand-by mode.

Amplifier

Output power PMPO : 128 W

MPO : 64 W (32 W + 32 W) (10% T.H.D.) RMS: 64 W (32 W + 32 W) (10% T.H.D.) RMS: 40 W (20 W + 20 W) (1% T.H.D.)

Output terminals Speakers: 4 ohms

Headphones: 16 - 50 ohms (recommended: 32 ohms) Subwoofer pre-out (audio signal): 150 mV/10 k ohms at 70 Hz

Input terminals Audio In (Audio signal):

250 mV/47 k ohms

CD player

Type Single disc multi-play compact disc player Signal readout Non-contact, 3-beam semiconductor laser

D/A converter Multi bit D/A converter Frequency response 20 - 20,000 Hz Dynamic range 90 dB (1 kHz)

pickup

Tuner

Frequency range FM: 87.5 - 108 MHz

AM: 522 - 1,620 kHz

Speaker

Type 2-way type speaker system

Maximum input power

Rated input power 32 W Impedance 4 ohms Dimensions Width: 130 mm (5 - 1/2")

Weight 1.9 kg (4.2 lbs.)/each

5 cm (2") tweeter 10 cm (4") woofer

64 W

Height: 260 mm (10 - 1/4") Depth: 164.5 mm (6 - 1/2")

1 – 1

1 – 3

XL-DK227NH

[3] Names Of Parts

Docking Station

MICRO COMPONENT SYSTEM

10 11 12

13 14

Front panel

1.Disc Tray

2.On/Stand-by Button

3.Disc Tray Open/Close Button

4.Timer Indicator

5.Disc or iPod Play or Pause Button

6.Disc Stop Button

7.Volume Control

8.Audio In Socket

9.Headphones Socket

10.CD Button

11.Tuner (Band) Button

12.Remote Sensor

13.Audio In Button

14.iPod Button

15.iPod Docking Station

1234 910

5 6 7 8

16 17

121314

3 4

Display

1.MP3/WMA Folder Indicator

2.MP3/WMA Title Indicators

3.MP3 Indicator

4.WMA Indicator

5.RDS Indicator.

6.Traffic Announcement Indicator

7.Dynamic PTY Indicator

8.Traffic Programme Indicator

9.Sleep Indicator

10.Timer Play Indicator

11.MP3/WMA Total Indicator

12.Daily Timer Indicator

13.FM Stereo Mode Indicator

14.FM Stereo Receiving Indicator

15.Memory Indicator

16.Extra Bass Indicator

17.Disc Repeat Play Indicator

18.Disc Pause Indicator

19.Disc Play Indicator

Rear panel

1.Speaker Terminals

2.AC Power Lead

3.FM 75 Ohms Aerial Socket

4.AM Aerial Earth Terminal

5.AM Loop Aerial Terminal

6.Video Out Socket

7.Subwoofer Pre-output Socket

Speaker system

1. Tweeter

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

1 – 4

1 – 2

XL-DK227NH

Remote control

2 3

8 9 10

15 16

1817

20 21

5 6 7

22 23 24 25

1. Remote Control Transmitter

2.Disc Clear/Dimmer, iPod Menu Button

3.Memory, iPod Enter Button

4.Disc Direct Search Buttons

5.Equaliser Mode Select Button

6. Extra Bass/Demo Button

7.Volume Up and Down Buttons

8. On/Stand-by Button

9. CD Button

10.Tuner (Band) Button

11.Audio In/iPod Button

12.Disc Stop Button

13.Disc Play or Pause Button

14.iPod Play or Pause Button

15.Tuning Up, Select iPod Menu Items Button

16.CD Track Up or Fast Forward, Tuner Preset Up, Time Up Button

17.CD Track Down or Fast Reverse, Tuner Preset Down, Time Down Button

18.Tuning Down, Select iPod Menu Items Button

19.Play Mode Button

20.Display Button

21.Folder Button

22.Clock/Timer Button

23.RDS ASPM Button

24.RDS PTY Button

25.RDS Display Button

1 – 5

1 – 3

XL-DK227NH

CHAPTER 2. ADJUSTMENTS

[1] CD Section

1. CD SECTION

• Adjustment Since this CD system incorporates the following

automatic adjustment functions, readjustment is not needed when replacing the pickup. Therefore, different PWBs and pickups can be combined freely.

Each time a disc is changed, these adjustments are performed automatically. Therefore, playback of each disc can be performed under optimum conditions.

Items adjusted automatically

1) Offset adjustment (The offset voltage between the head amplifier output and the VREF reference voltage is compensated inside the IC.)

* Focus offset adjustment * Tracking offset adjustment

2) Tracking balance adjustment

3) Gain adjustment (The gain is compensated inside the IC so that the loop gain at the gain crossover frequency will be 0 dB.)

* Focus gain adjustment * Tracking gain adjustment

2 – 1

XL-DK227NH

[2] Test Mode

• Setting the test mode

During AC unplug, plug-in AC while pressing down the POWER button and CD button. Then, press the CD button to enter the test mode.

Step

C DTEST

OPEN/CLOSE operation is using manual. IL isn’t done

<< >> key input.

Laser ON.

<< >> key input.

Focus ON

<< >> key input.

CLV Servo ON

<< >> key input.

IL isn’t done

Step

Tracking Servo ON

Hold down << CD >> key for more than 2 sec.

Start Auto Adjustment at current pick-up location.

<< >> key input.

Reading Sub-code and Display

<<STOP>> key input.

STOP and return to Step

<<STOP>> key input.

2 – 2

XL-DK227NH

Note

STOP and return to Step

Everytime << DISPLAY >> key input

a) Focus Balance = FB : XX b) Focus Gain = FG : XX c) Tracking Balance = TB : XX d) Tracking Gain = TG : XX e) Focus Offset = FOFF : XX f) Tracking Offset = TOFF : XX g) RFRP = RFRP : XX h) Focus Error (RW Judgement) = RW : XX - XXXX i) Focus Error (Other than RW Judgement) = DA : XX - XXXX

<<STOP>> key input.

STOP and return to Step

Sliding the PICKUP with << >>, << >> button can be set in STOP mode or play mode. During at Step , if press << >> for more than 1 sec, it directly goes to step .

To cancel: Power OFF

2 – 3

XL-DK227NH

[3] Standard Specification Of Stereo System Error Message Display Contents

Error Contents DISPLAY Notes

CD Focus Not Match/IL Time Over. ‘NO DISC’

TUNER PLL Unlock.

87.50

FM MHz

AMP abnormal detection and +B PROTECTION display

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

Example: In case of speaker abnormal

PLL Unlock.

ON TIMER LED OFF OFF

NO NO. 1.1

NO. 1 : +B PROTECTION NO. 2 : AMP abnormal

FLASHING FLASHING

OFF

NO. 2

FRAME

ON ON ON

OFF OFF OFF OFF

NO. 2

(REPEAT)

BEFORE TRANSPORTING THE UNIT

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

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

2. While pressing down the POWER button and the CD button, plug-in AC. The Micro Computer version number will be displayed as "X7H10**".

3. Press the POWER button until "WAIT" --> "FINISHED" appears.

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

2 – 4

XL-DK227NH

[1] Disassembly

Caution on disassembly

Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance:

1) Take cassette tape and compact disc out of the unit.

2) Be sure to remove the power supply plug from the wall o

utlet before starting to disassemble the unit.

3) Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they were before disassembling.

4) Take sufficient care on static electricity of integrated c

ts and other circuits when servicing.

ircui

STEP R

1 Top Cabinet 1

2 Side Panel

3 CD Changer unit 2

4 Rear Panel with 2

5 Front Panel 3

6 Main PWB 3

7 Power PWB 3

8 Speaker PWB 4

9 Display PWB 5

10 USB PWB / SUB PWB 5

11 Jack PWB 5

12 Re-Flash PWB 6

13 CD MP3 PWB 7

14 CD Mechanism 7

EMOVAL PROCED

1. Screw ............................ (A1) X 6

(Left/Right)

Speaker PWB

1. Screw ............................ (B1) X 8

1. Screw ............................(C1) X 2

2. Hook ..............................(C2) X 2

3. Socket ........................... (C3) X 3

4. Flat Cable ......................(C4) X 2

1. Screw ............................(D1) X 4

2. Socket ........................... (D2) X 1

3. Flat Cable ......................(D3) X 1

1. Screw ............................ (E1) X 3

2. Flat Cable ......................(E2) X 2

3. Socket ........................... (E3) X 1

4. Hook ..............................(E4) X 2

1. Screw ............................ (F1) X 3

2. Socket ........................... (F2) X 2

1. Screw ............................(G1) X 4

1. Screw ............................(H1) X 2

1. Knob ...............................(J1) X 1

2. Nut..................................(J2) X 1

3. Washer...........................(J3) X 1

4. Screw .............................(J4) X 6

1. Screw ............................ (K1) X 2

1. Screw ............................ (L1) X 1

1. Screw ........................... (M1) X 1

1. Screw ............................(N1) X 3

2. Flat Cable ......................(N2) X 2

3. Socket ........................... (N3) X 1

1. Screw ............................ (P1) X 4

2. Screw ............................ (P2) X 4

URE FIGURE

Top Cabinet

(A1)x2 3x12mm

(B1)x2 3x10mm

Side Panel (Right)

(A1)x2 3x12mm

(B1)x2 3x10mm

Rear Panel

(B1)x2 3x10mm

(D1)x4 3x10mm

Figure 1

CD MP3 PWB

CD Changer Unit

(C1)x1 3x10mm

(C4)x2

(C3)x2

(C3)x1

Rear Panel

Speaker PWB

(B1)x2 3x10mm

PULL

Hook

(C2)x1

Front Panel

(D2)x1

Side Panel

(Left)

Front Panel

(D3)x1

(A1)x2 3x12mm

Hook

(C2)x1

PULL

(C1)x1 3x10mm

Figure 2

(E1)x1

3x6mm

(F1)x1

3x6mm

(E4)x1

PULL

(F2)x1

(G1)x4

Power PWB

4x6mm

(E3)x1

Front panel

PULL

(E2)x2

Hook (E4)x1

Note:

After removing the connector for the optical pickup from

nnector, wrap the conductive aluminium foil around

the co the fr

ont end of the connector so as to protect the optical

from electrostatic damage.

pickup

3 – 1

Main PWB

Figure 3

(F1)x2 3x10mm

(F2)x1

(E1)x2

3x10mm

XL-DK227NH

Speaker PWB

Display PWB

(J4)x6

Ø2.6x10mm

SUB PWB

USB PWB

(K1)x2

Ø2.6x10mm

Rear Panel

Figure 4

Jack PWB

(L1)x1

Special

Figure 5

Front Panel

(J2)x1

(J3)x1

(H1)x2 Ø3x10mm

(J1)x1

STEP PROCEDURE FIGURE

1 Woofer 1. Net Frame Ass’y............ (A1) X 1

REMOVAL

9, 10

2. Catching Holder............. (A2) X 4

3. Screw ............................ (A3) X 4

4. Screw ............................ (A4) X 4

2 Tweeter 1. Screw ............................ (B1) X 2

(A1)x1

Screwdriver

Driver should be pried away from Speaker Box.

Figure 9

Speaker Box

Re-Flash PWB

(M1)x1

Ø3x10mm

CD Changer Unit

(P1)x2

Ø3x10mm

Main Chassis

Figure 6

(N1)x3

Ø3x10mm

Figure 7

(N2)x2

(P1)x2

(N3)x1

3x10mm

Woofer

(A1)x4

M3.5x12mm

Tweeter

(B1)x2

M3.5x12mm

Figure 10

SPEAKER UNIT

LOCKING TAB

CAUTION:

TO REMOVE SPEAKER UNIT, PRESS THESE LOCKING TABS TO RELEASE SPEAKER WIRES.

SPEAKER WIRE

3 – 2

XL-DK227NH

CHAPTER 4. DIAGRAMS

[1] Main Block Diagram

1 2 3 4 5 6 7 8 9

Q609

11 12 13 14 15

CNP301

(15 PINS)

TUNER PACK UNIT (RTUNSA025AWZZ)

IC901 TDA8922BJ

F802

T4A L250V

F801

T4A L250V

F804

T2A L250V

F803

T2A L250V

Figure 1: MAIN BLOCK DIAGRAM (1/2)

4 – 1

F805

T1.6A L250V

XL-DK227NH

802 L250V

801 L250V

F804

A L250V

F803

A L250V

F805 A L250V

AC LINE FILTER

L841

AC POWER

SUPPLY CORD

AC 220-240V ~ 50Hz

242526

Figure 2: MAIN BLOCK DIAGRAM (2/2)

4 – 2

XL-DK227NH

[2] CD Block Diagram

Figure 4-3: CD BLOCK DIAGRAM (1/2)

4 – 3

XL-DK227NH

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

4 – 4

XL-DK227NH

FOO

TRO

DMO

FOO

DMO

TEI

RFO

FOO

TEI

FOO

DMO

LPFO

TMAX

BCKI

AIN

LRCKI

RFO

614

619

10115

CHAPTER 5.

CIRCUIT DESCRIPTION

[1] Waveforms Of Servo Circuit

IC1 IC1

IC1

IC1 IC1

IC1

IC1 IC1

IC1

5 – 1

[2] Voltage

IC1

VOLTAGE

1 0.02 26 0.01 51 1.53 76 3.26 2 1.63 27 1.52 52 0.03 77 1.63 3 0.76 28 3.03 53 3.27 78 0.98 4 0.70 5 0.59 30 1.52 55 0.03 80 1.74 6 0.70 7 1.63 32 3.27 57 1.53 82 1.63 8 3.27 33 0.03 58 3.27 83 1.68

9 1.63 34 4.53 59 0.04 84 1.63 10 1.63 35 1.53 60 3.27 85 1.62 11 1.63 36 0.01 61 0.03 86 1.64 12 1.63 37 3.25 62 0.03 87 1.66 13 1.63 38 2.41 63 0.03 88 1.62 14 0.01 39 2.14 64 0.03 89 15 0.52 40 2.59 65 1.62 90 3.27 16 0.55 41 2.25 66 1.65 91 3.25 17 0.01 42 0.61 67 3.24 92 0.01 18 0.01 43 3.25 68 1.49 93 0.02 19 1.11 44 0.04 69 0.02 94 1.63 20 0.36 45 0.04 70 1.63 95 1.63 21 0.26 46 0.04 71 3.26 96 1.63 22 0.01 47 0.04 72 1.61 97 1.63 23 0.26 73 1.31 98 1.63 24 0.34 49 1.64 74 0.02 99 1.64 25 0.54 50 1.65 75 1.38 100 1.63

VOLTAGE

29 1.52 54 0.03 79 0.02

31 0.01 56 3.27 81 1.63

48 0.10

VOLTAGE

PIN NO

VOLTAGE

XL-DK227NH

0.50

IC2

VOLTAGE

1 3.18 10 3.27 19 3.20 28 7.09 2 3.17 11 1.63 20 3.20 29 0.01 3 3.19 12 1.63 21 0.01 30 1.63 4 3.20 13 1.63 22 0.01 31 2.24 5 3.19 14 1.63 23 0.01 32 3.15 6 3.18 15 1.63 24 0.01 33 3.16 7 0.00 16 1.63 25 0.00 34 2.69 8 4.39 17 1.62 26 7.03 35 3.16 9 7.08 18 1.62 27 7.08 36 3.16

Q1 Q2 Q3 Q4

VOLTAGE

E 3.26 E 5.05 E 1.48 E 0.01 C 0.89 C 3.26 C 3.26 C 0.02 B 4.37 B 4.37 B 2.17 B 3.11

VOLTAGE

E 5.08 C 5.05 B

4.37

VOLTAGE

E 0.00 C 0.04 B

2.98

VOLTAGE

PIN NO

VOLTAGE

5 – 2

XL-DK227NH

IC701 IC601 IC705

VOLTAGE

1 2.60m 51 3.50m 1 4.10 1 8.43 2 2.60m 52 -0.20m 2 4.10 2 8.49 3 3.13 53 1.88 3 4.10 3 3.77 4 3.13 54 3.28 4 0.40m 4 2.39 5 2.00m 55 3.04 5 4.10 5 0.49 6 3.12 56 2.80m 6 4.12 6 0.49 7 3.13 57 2.30m 7 4.10 7 0.49 8 1.30m 58 2.00m 8 4.12 8 0.49

9 0.50m 59 2.80m 9 4.12 10 0.37 60 2.80m 10 4.11 11 0.65 61 2.80m 11 4.12 IC604 12 3.21 62 3.13 12 0.40m 13 1.46 63 1.80m 13 0.40m 14 0.20m 64 0.70m 14 0.40m 1 5.01 15 1.35 65 2.00m 15 3.13 2 5.00 16 3.15 66 2.40m 16 3.13 3 4.88 17 3.15 67 3.04 17 3.13 4 0.70m 18 1.15 68 0.60m 18 9.28 5 4.90 19 1.40m 69 1.10m 19 9.28 6 5.00 20 3.11 70 3.28 20 4.10 7 5.02 21 3.28 71 33.80m 21 4.12 8 10.00 22 1.30m 72 3.13 22 4.12 23 2.30m 73 3.13 23 4.11 24 2.60m 74 2.90m 24 4.12 IC603 25 0.90m 75 2.80m 25 4.12 26 1.40m 76 2.10m 26 4.10 27 3.21 77 1.10m 27 4.12 1 2.02 28 3.13 78 3.13 28 4.11 2 216.70m 29 3.21 79 1.50m 29 0.50m 3 2.02 30 3.21 80 3.11 30 4.11 4 -1.80m 31 1.48 81 2.70m 31 4.11 5 2.03 32 4.80m 82 3.11 32 4.11 6 2.04 33 2.13 83 4.90m 7 2.02 34 0.86 84 48.00m 8 5.07 35 4.40m 85 3.28 36 4.50m 86 3.13 IC901 37 4.10m 87 2.70m 38 24.20m 88 2.90m 39 23.70m 89 3.10m 1 2.39 13 -26.81 40 4.30m 90 2.00m 2 -0.94 14 -6.32 41 0.90m 91 3.28 3 -0.94 15 -5.91 42 4.30m 92 3.18 4 -0.90 16 -0.81 43 3.80m 93 3.18 5 0.40m 17 -26.60 44 4.20m 94 3.18 6 -26.65 18 -26.60 45 4.20m 95 3.18 7 260.90m 19 0.00 46 3.12 96 1.30m 8 -0.80 20 -0.90 47 3.30m 97 3.18 9 -6.02 21 -0.30m 48 3.70m 98 53.50m 10 -6.53 22 -0.30m 49 3.90m 99 3.13 11 -26.71 23 -0.93 50 3.20m 100 2.90m 12 -14.31

(V)

VOLTAGE

(V)

VOLTAGE

PINNOVOLTAGE

(V)

PINNOVOLTAGE

VOLTAGE

(V)

5 – 3

XL-DK227NH

IC702

VOLTAGE

1 -26.44 33 -26.42 2 -26.40 34 -28.77 3 -26.40 35 -26.41 4 -26.40 36 -26.40 5 3.24 37 -26.41 6 3.20 38 -24.06 7 3.27 39 -17.00 8 3.24 40 -26.40

9 0.00 41 -24.07 10 0.00 42 -9.89 11 3.29 43 -26.40 12 1.51 44 -9.98 13 1.51 45 -17.00 14 0.00 46 -12.34 15 -24.10 47 -9.94 16 -28.77 48 -26.40 17 -28.78 49 -26.42 18 -28.77 50 -24.06 19 -28.77 51 -14.67 20 -28-75 52 -12.36 21 -28.77 53 -28.76 22 -28.77 54 -28.76 23 -21.70 55 -28.76 24 -28.97 56 -28.75 25 -26.40 57 -26.45 26 -28.77 58 -26.41 27 -28.76 59 -26.41 28 -28.76 60 -26.40 29 21.71 61 -26.40 30 -24.06 62 -26.40 31 -24.07 63 -26.40 32 -24.07 64 -26.40

(V)

VOLTAGE

(V)

IC851 IC852

VOLTAGE

(V)

VOLTAGE

(V)

1 5.10 1 13.24 2 13.00 2 88.4m 3 17.60 3 4.76

m01.01-4

08.615

00.016

64.87

Q905IC853

VOLTAGE

VOLTAGE 1 5.07 D 35.10 2 5.07 S 26.53 3 3.28 G 31.77

39.14 m05.01-5 m04.01-6 m02.01-7

8 -10.20m

Q901 PIN NO

VOLTAGE D 27.82 S 35.68 G 30.91

5 – 4

XL-DK227NH

-MEMO-

5 – 5

XL-DK227NH

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

REF. NO DESCRIPTION POSITION

SW701 POWER ON/STAND-BY ON—OFF SW702 TRAY OPEN/CLOSE ON—OFF SW703 PLAY/PAUSE ON—OFF SW704 STOP ON—OFF SW705 CD ON—OFF SW706 TUNER ON—OFF SW707 AUDIO IN ON—OFF SW708 iPOD ON—OFF VR701 VOLUME MAX—MIN

• 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 CD section, the CD is stopped.

• 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.

[2] Types Of Transistor And LED

FRONT

VIEW

ECB (S)(G)(D) (1)(2)(3)

KTA1271 Y KTA1274 Y

FRONT

123

TDA8922

KTC3199 GR

VIEW

(3)

(1)

TOP

VIEW

KRA102 S KRC107 KRC102 S KRC104 S KTA1504 GR KTC3875 GR KTA1544 T KRA107 KRA104 S

FRONT

VIEW

AC AC

TS6P05GM

TOP VIEWTOP VIEW

(2)

HSS4148

FRONT VIEW

343VC3F 503BC2E30

1N4004S DRL204F MA111

FRONT

VIEW

123

KIA7805A

6 – 1

XL-DK227NH

C697

R680

[3] Schematic Diagram

MAIN PWB-A1

FM SIGNAL CD SIGNAL

AUDIO SIGNAL iPOD SIGNAL

47/10

47K

47/10

100/16

47K

TO MICOM SECTION

10K

R686

C698

680P

3.9K

27K

TO CD SECTION

23456

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

6 – 2

XL-DK227NH

27K

R680

3.9K

C697

680P

2.7K

C632

2200pF

2.7K

680P

2.7K

2.2K

0.18uF(ML)

2.2K

2.7K

8 9 10 11 12

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

6 – 3

XL-DK227NH

2.7K

C633

2200pF

2.7K 680P

FROM HEADPHONE PWB-A4

TO IPOD SECTION

TO CHASSIS

TO MICOM SECTION

27K

L926

100uH

TO MICOM SECTION

14 15 16 17 18

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

6 – 4

XL-DK227NH

C697

C698

10K

680P

27K

TO CD SECTION

Q610

KTA1504GR

RDS DATA

RDS CLK

TEST +3.3V

15 14 13 12

R675

R628

68K

C674

220P

R629

220K

C675

220P

R676

KRC102S

R683

10K

47K

Q609

SW 3.3V

CNP301

ZX15AW

23456

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

6 – 5

XL-DK227NH

27K

C697

680P

MA111G

GND

D905

D906

8 9 10 11 12

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

6 – 6

XL-DK227NH

27K

L926

100uH

TO MICOM SECTION

ZD862 ZJ15B

LUG1

B039AW

+13V

FROM POWER SECTION

FROM CLAMP SECTION

14 15 16 17 18

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

6 – 7

XL-DK227NH

MAIN PWB-A1

AMPLIFIER SECTION

23456

Figure 6-7: AMPLIFIER & SPEAKER SCHEMATIC DIAGRAM (1/2)

C950

Z0049AW

L927

Z2130SCT5T

6 – 8

D930

MA111G

XL-DK227NH

FM SIGNAL

A523WJ

Z2130SCT5T

GND

(CHASSIS)

B036AWPZ

B059AW

0.1

C963

L921

Z0055

C962

0.1

L920

Z0055

SPEAKER PWB-B2

8 9 10 11 12

Figure 6-8: AMPLIFIER & SPEAKER SCHEMATIC DIAGRAM (2/2)

6 – 9

XL-DK227NH

MAIN PWB-A1

MICOM SECTION

CNP701B WZY18AW

23456

Figure 6-9: MICOM & HEADPHONE SCHEMATIC DIAGRAM (1/6)

6 – 10

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