Sharp DKAP-2 Service manual

DK-AP2/DK-AP2(BK)

SERVICE MANUAL

No. S7737DKAP2H//

MUSIC SYSTEM FOR iPod

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

CONTENTS

MODEL

DK-AP2

(For Europe, U.K.)

MUSIC SYSTEM FOR iPod

MODEL

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

• Note for users in U.K.

Recording and playback of any material may require consent which SHARP is unable to give. Please refer particularly to the provisions of Copyright Act 1956, the Performers Protection Acts 1963 and 1972 and subsequent statutory enactments and orders.

DK-AP2(BK

(For Europe, U.K.)

)

PRECAUTIONS FOR USING LEAD-FREE SOLDER

CHAPTER 1. GENERAL DESCRIPTION

[1] Important Service Notes (for U.K. only) ..........1-1

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

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

CHAPTER 2. MECHANICAL DESCRIPTION

[1] Disassembly .................................................. 2-1

CHAPTER 3. DIAGRAMS

[1] Block Diagram ................................................3-1

CHAPTER 4. CIRCUIT DESCRIPTION

[1] Voltage .......................................................... 4-1

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.

CHAPTER 5. CIRCUIT SCHEMATICS AND PARTS

LAYOUT

[1] Notes On Schematic Diagram .......................5-1

[2] Types Of Transistor And LED........................ 5-1

[3] Chart Of Connecting Wires............................ 5-2

[4] Schematic Diagram .......................................5-4

[5] Wiring Side Of PWB ...................................... 5-14

CHAPTER 6. OTHERS

[1] Function Table Of IC...................................... 6-1

PARTS GUIDE

SHARP CORPORATION

– 1

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

DK-AP2/DK-AP2(BK)

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN, iPOD, POWER SWITCH, PLAY SWITCH, BATTERY POSITIVE, BATTERY NEGATIVE, LED 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.

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.

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

Lead-free wire solder for servicing

Ref No.

PWB-A 92LPWB6822MANS

PWB-B 92LPWB6822SWHS

Parts No.

92LPWB6758LEDSPWB-C

Description

MAIN (A1), iPOD (A2)

POWER SWITCH (B1), PLAY SWITCH (B2), BATTERY POSITIVE (B3), BATTERY NEGATIVE (B4)

LED

– 2

DK-AP2/DK-AP2(BK)

CHAPTER 1.

GENERAL DESCRIPTION

CAUTION: “Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type”.

[1] Important Service Notes (for U.K. only)

Before returning the unit to the customer after completion of a repair or adjustment it is necessary for the following withstand voltage test to be applied to ensure the unit is safe for the customer to use.

Setting of Withstanding Voltage Tester and set.

Set name set value Withstanding Voltage Tester Test voltage 4,240 VPEAK

Set time 6 secs Set current (Cutoff current) 4 mA Unit Judgment OK: The “GOOD” lamp lights.

NG: The “NG” lamp lights and the buzzer sounds.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.

[2]

Specifications

3,000 VRMS

DK-AP2/DK-AP2(BK)

DK-AP2/DK-AP2(BK) for U.K.

WITHSTANDING

VOLTAGE TESTER

SHORT-CIRCUIT AC POWER

SUPPLY CORD

PROBE

OUT

AC/DC

ADAPTOR

CONNECT THE PROBE

TO SHELL OF DC CONNECTOR

General

Power source DC IN 6V 2A: AC/DC adaptor

Power consumption

Output power Speakers:

Speaker 1-way type speaker system

Speaker maximum input power

Speaker rated input power

Output terminals

Input terminals

Dimensions Width: 380 mm (15")

Weight 1.2 kg (2.65 lbs)

*This power consumption value is obtained when in the power

*stand-by mode.

(AC 100 - 240 V ~ 50/60 Hz)

DC IN 3V [ “AA” size (UM/SUM-3, R6 or HP-7) battery x 4]

Power on : 3.8 W Power stand-by: 0.2 W (*)

RMS: 3.8 W (1.9 W + 1.9 W) (DIN 45 324)

Speakers: 5 cm (2") - 6 ohms - Full Range

3.8 W/Channel

1.9 W/Channel

Video output: 1Vp-p

Auxiliary (audio signal): 500 mV/47 k ohms

Height: 157 mm (6-2/5") Depth: 221 mm (8-7/10")

General

Power source

Power consumption

Output power

Speaker

Speaker maximum input power

Speaker rated input power

Output terminals Video output: 1Vp-p

Input terminals Auxiliary (audio signal):

Dimensions Width: 380 mm (15")

Weight 1.2 kg (2.65 lbs)

* This power consumption value is obtained when in the power

stand-by mode.

DC IN 6V 2A: AC/DC adaptor

(AC 100 - 240 V ~ 50/60 Hz)

DC IN 3V [ “AA” size (UM/SUM-3, R6 or HP-7) battery x 4]

Power on : 3.8 W Power stand-by: 0.2 W*

Speakers: RMS: 3.8 W (1.9 W + 1.9 W) (10% T.H.D.)

1-way type speaker system

Speakers: 5 cm (2") - 6 ohms - Full Range

3.8 W/Channel

1.9 W/Channel

500 mV/47 k ohms

Height: 157 mm (6-2/5") Depth: 221 mm (8-7/10")

1 – 3

1 – 1

DK-AP2/DK-AP2(BK)

[3] Names Of Parts

34 5 6 7 8 9

ESOUND

STAND-BY

Top view

1. Power Indicator

2. E SOUND Indicator

3. Skip Down Button

4. Play/Pause Button

5. Skip Up Button

6. iPod Dock

- VOL

-BY

N/STAND

N/STAND O

7. Volume Down Button

8. ON/STAND-BY Button

9. Volume Up Button

10. Stand-by Indicator

Side view

1. DC Input Socket

2. Auxiliary Input Socket

3. Video Out Socket

VIDEO OUT

DC IN 6V

AUX IN

Bottom view

1. Battery Compartment

Remote control

1. Remote Control Transmitter

2. On/Stand-by Button

3. Volume Up and Down Buttons

4. Skip Down Button

5. Skip Up Button

6. Dimmer Button

7. Display Button

8. Play Mode Button

9. E SOUND Button

10. Play/Pause Button

1 – 4

1 – 2

CHAPTER 2. MECHANICAL DESCRIPTION

[1] Disassembly

DK-AP2/DK-AP2(BK)

Caution on disassembly

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

1) Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.

2) 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.

3) Take sufficient care on static electricity of integrated circuits and other circuits when servicing.

STEP REMOVAL PROCEDURE FIGURE

1 Bottom Cover 1

2 Battery Positive PWB/

Battery Negative PWB

3 Speaker Box Ass’y 3

4 Main PWB 4

5 iPOD PWB 5

6 Play Switch PWB/

Power Switch PWB

7 Back Cabinet 6

8 LED PWB 7

9 Speaker 8

1. Open Battery Cover................A1

2. Screw ............................(A2) X 4

3. Screw ............................(A3) X 1

4. Socket ...........................(A4) X 1

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

1. Screw ............................(C1) X 3

2. Socket ...........................(C2) X 2

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

2. Screw ............................(D2) X 4

3. Screw ............................(D3) X 1

4. Socket ...........................(D4) X 1

5. Flat Cable ...................... (D5) X 1

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

1. Screw ............................(F1) X 4

1. Screw ..........................(G1) X 10

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

2. Screw ............................(H2) X 2

1. Screw ............................(K1) X 8

Battery Negative PWB

Bottom Cover

(B1)x2 M2.6x6mm

Figure 2

Battery Positive PWB

Speaker Box Ass’y

(C2)x2 From Main PWB

(A4)x1

From Main PWB

A1 Battery Cover

(A2)x4 M3x8mm

(A3)x1 M3x8mm

Bottom Cover

Figure 1

Main Unit

2 – 1

(C1)x3 M3x10mm

Bottom Cabinet

Figure 3

DK-AP2/DK-AP2(BK)

(D1)x1 M3x8mm

Bottom Cabinet

(H1)x1 M3x10mm

LED PWB

LED Holder

Main PWB

Main Chassis

(D2)x4 M3x10mm

(D3)x1 M3x8mm

Figure 4

Bottom Cabinet

(D5)x1 From Switch PWB

(D4)x1 From iPOD PWB

To Battery PWB

(H2)x2 M3x10mm

(K1)x4 M3x8mm

Speaker

Speaker Wire

BLUE

(K1)x4 M3x8mm

Front Panel Ass’y

Figure 7

Speaker

RED

Front Panel Ass’y

iPOD PWB

Play Switch PWB

(G1)x10 M3x10mm

(F1)x2 M2.6x8mm

Figure 5

Figure 6

(F1)x2 M2.6x8mm

(E1)x2 M2.6x8mm

Speaker Box Ass’y

Power Switch PWB

Figure 8

Back Cabinet

2 – 2

-MEMO-

DK-AP2/DK-AP2(BK)

2 – 3

DK-AP2/DK-AP2(BK)

CHAPTER 3. DIAGRAMS

[1] Block Diagram

Figure 1: BLOCK DIAGRAM (1/2)

3 – 1

DK-AP2/DK-AP2(BK)

Figure 2: BLOCK DIAGRAM (2/2)

3 – 2

DK-AP2/DK-AP2(BK)

CHAPTER 4.

CIRCUIT DESCRIPTION

[1] Voltage

IC101 IC102 IC103

PINNOVOLTAGE

(V) 1 3.44 1 1.65 1 1.62 9 1.02 2 3.46 2 1.66 2 1.63 10 1.64 3 123.30mV 3 1.65 3 1.64 11 1.62 4 3.46 4 1.90mV 4 2.10mV 12 1.63 5 3.45 5 1.65 5 3.30 13 3.29 6 3.47 6 1.66 6 3.30 14 7 4.93 7 1.65 7 2.10mV 15 8 3.43 8 3.30 8 1.03 16 1.64 9 2.11

10 3.47

IC104

PINNOVOLTAGE

(V) 1 77.10mV 17 200.40mV 1 3.29 17 1.63 2 138.20mV 18 350.20mV 2 3.29 18 -200.80mV 3 4.98 19 46.50mV 3 3.29 19 -166.40mV 4 4.98 20 94.50mV 4 0.20mV 20 185.50mV 5 2.46 21 4.98 5 6 2.42 22 2.48 6 3.27 22 7 3.29 23 -80.30mV 7 -8.60mV 23 0.10mV 8 4.98 24 4.96 8 3.29 24 0.00 9 2.48 25 4.98 9 0.20mV 25 3.29

10 0.50mV 26 3.29 10 1.57 26 1.65 11 20.50mV 27 2.42 11 12 4.98 28 2.46 12 1.40mV 28 0.88 13 0.80mV 29 0.60mV 13 -3.20mV 29 0.50mV 14 7.20mV 30 2.47 14 1.03 30 0.20mV 15 10.50mV 31 -10.70mV 15 -0.30mV 31 0.00 16 12.40mV 32 -24.30mV 16 -0.40mV 32 0.10mV

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

3.29

1.53

PINNOVOLTAGE

IC600

PINNOVOLTAGE

21 2.46

27 3.04

(V)

3.29

1.64

(V)

1.62

IC801 IC802

PINNOVOLTAGE

(V) 1 3.29 1 3.29 1 3.29 1 1.35 2 -1.40mV 2 -0.10mV 2 -0.80mV 2 527.00mV 3 2.47 3 1.25 3 1.26 3 1.94 4 3.26 4 3.30 4 3.29 4 -1.10mV 5 5.91 5 5.92 5 5.92 5 5.91

IC805 IC806 IC807

PINNOVOLTAGE

(V) 1 -1.00mV 1 3.29 1 3.26 2 -1.10mV 2 -0.10mV 2 3.24 3 3.27 3 -0.30mV 3 3.29 4 3.29 4 3.29 4 3.26 5 3.29 5 -0.80mV 5 3.29

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

6 3.29 6 3.29 7 -0.80mV 7 -1.10mV 8 2.06 8 0.81

9 1.24 9 0.82 10 3.29 10 3.26 11 1.63 11 -1.00mV 12 2.06 12 0.82 13 2.46 13 7.40mV 14 3.29 14 3.29

IC803

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

IC804

PINNOVOLTAGE

(V)

72.22

85.89

1.23

4 – 1

DK-AP2/DK-AP2(BK)

IC809 IC810

VOLTAGE

1 0.60mV 11 0.21 1 2.29 9 2.28 2 -0.30mV 12 1.22 2 2.28 10 3.50mV 3 3.29 13 2.46 3 0.10mV 11 3.50mV 4 3.29 14 3.29 4 0.10mV 12 83.30mV 5 -0.40mV 15 100.20mV 5 0.10mV 13 5.01 6 25.50mV 16 0.82 6 78.50mV 14 5.01 7 3.29 17 0.82 7 3.50mV 15 5.01 8 3.29 18 0.82 8 3.50mV 16 188.80mV 9 3.29 19 0.82

10 -0.20mV 20 3.29

PINNOVOLTAGE

1 5.92 1 6.21 2 4.98 2 0.00 3 0.20mV 3 5.01 4 4.98 5 2.98

(V)

IC811 IC813

(V)

PINNOVOLTAGE

(V)

PINNOVOLTAGE

(V)

VOLTAGE

(V)

PINNOVOLTAGE

(V)

4 – 2

DK-AP2/DK-AP2(BK)

-MEMO-

4 – 3

DK-AP2/DK-AP2(BK)

CHAPTER 5. 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.

REF. NO DESCRIPTION POSITION

SW301 POWER ON / STAND-BY ON—OFF SW302 VOLUME UP ON—OFF SW303 VOLUME DOWN ON—OFF SW304 PLAY/PAUSE ON—OFF SW305 FORWARD ON—OFF SW306 REVERSE ON—OFF

• 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 FM stereo

• 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

(3)

TOP

VIEW

(1)

KRC107S KTC3875 GR KRA102S KTC2875B

FRONT

VIEW

3 2 1

KIA78D05

(2)

Cathode

Anode

A304VT2H A343BD2S2 A304AD2E

TOP VIEW

MA111 IN5820 SK24A MA21038 RB160M30

D1SS119

KiA278R05

FRONT

VIEW

12345

1 - INPUT (Vin) 2 - OUTPUT (V

3 - GND 4 - V

O SENSE

5 - ON/OFF CTRL (V

5 – 1

DK-AP2/DK-AP2(BK)

[3] Schematic Diagram

23456

Figure 5-1: MAIN SCHEMATIC DIAGRAM (1/6)

5 – 2

DK-AP2/DK-AP2(BK)

8 9 10 11 12

Figure 5-2: MAIN SCHEMATIC DIAGRAM (2/6)

5 – 3

DK-AP2/DK-AP2(BK)

14 15 16 17 18

Figure 5-3: MAIN SCHEMATIC DIAGRAM (3/6)

5 – 4

DK-AP2/DK-AP2(BK)

23456

Figure 5-4: MAIN SCHEMATIC DIAGRAM (4/6)

5 – 5

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