Sharp CD-SW440N User manual

CD-SW440N
CD
USB
TAPE
AUDIOI
N
PHONES
POWER
ON/STAND-BY
FUNCTION
MINICOMPONENTS
YSTEM
CD-SW440
PUSH
OPEN
SERVICE MANUAL
No. SX948CDSW440N
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
CHAPTER 3. MECHANISM BLOCKS
[1] Caution On Disassembly...............................3-1
CHAPTER 4. DIAGRAMS
[1] Main Block Diagram ......................................4-1
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 ...................... 6-22
[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...................................................... 8-9
PARTS GUIDE
MINI COMPONENT SYSTEM
CD-SW440N
MODEL
CD-SW440N Mini Component System consisting of
CD-SW440N (main unit), CP-S440N (speaker system) and
CP-SW440N (subwoofer).
CONTENTS
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.
iPod is a trademark of Apple Inc.,
registered in the U.S. and other countries.
“Made for iPod” means that an electronic accessory has
been designed to connect specifically to iPod and has been
certified by the developer to meet Apple performance
standards.
Apple is not responsible for the operation of thi
s device or its
compliance with safety and regulatory standards.

CD-SW440N
– i –
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1.Employing lead-free solder
Lead-free wire solder for servicing
Ref No. Description Parts No.
"MAIN, POWER, DISPLAY/TAPE, SERVO, iPod, FRONT SPEAKER LED, SUBWOOFER 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.
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.
Examples:
Indicates lead-free solder of tin, silver and copper.
PWB-A 92LPWB7792MANS MAIN
PWB-B 92LPWB7792PWRS POWER (B1), DISPLAY/TAPE (B2)
PWB-C RUITKA036AWZZ SERVO
PWB-D 92LPWB7119PODS iPod
PWB-E 92LPWB6514LEDS FRONT SPEAKER LED
PWB-F 92LPWB7285LEDS SUBWOOFER LED

CD-SW440N
–2
CHAPTER 1. GENERAL DESCRIPTION
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
(Fire & Shock Hazard)
[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
0.15 µ F
TEST PROBE
1.5k ohms
10W
VTVM
AC SCALE
CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH
SAME TYPE F801, F802 6A, 125V/
F803, F804 2A, 125V/
F805 5A, 125V/
F808 1.6A, 125V FUSES.
ATTENTION: POUR ASSURER
UNE LONGUE PROTECTION CONTRE
UN INCENDIE, REMPLACER SEULEMENT
PAR UN FUSIBLE DE F801, F802 6A, 125V/
F803, F804 2A, 125V/
F805 5A, 125V/
F808 1.6A, 125V FUSES.
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.
1 – 1

CD-SW440N
– 4
[3] Specifications
General
Power source AC 120 V ~ 60 Hz
Power
consumption 102 W
Dimensions Width: 9 - 7/16" (240 mm)
Height: 12 - 7/16" (315.5 mm)
Depth: 11 - 5/32" (283.2 mm)
Weight 13.9 lbs. (6.3 kg)
Amplifier
Output power PMPO: 4500 watts
Front Speakers
RMS: Total 200 watts
(100 watts per channel into 4
ohms at 1 kHz, 10% total
harmonic distortion)
FTC: 75 watts minimum RMS per
channel into 4 ohms from 100
Hz to 20 kHz, 10% total
harmonic distortion.
Subwoofer
RMS: 150 watts into 8 ohms at
70 Hz, 10% total harmonic
distortion
FTC: 130 watts RMS into 8 ohms
from 50 Hz to 120 Hz, 10%
total harmonic distortion.
Output terminals Speakers: 4 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Video output : 1Vp-p
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 pickup
D/A converter Multi bit D/A converter
Frequency
response 20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Cassette deck
Frequency
response 50 - 14,000 Hz (normal tape)
Signal/noise
ratio 50 dB (playback)
Wow and flutter 0.35% (WRMS)
USB
USB host interface Complies with USB 1.1 (Full
Speed)/ 2.0 Mass Storage
Class.
Support Bulk only and CBI
protocol.
Support file MPEG 1 Layer 3
WMA (Non DRM)
Bitrate support MP3 (32 ~ 320 kbps)
WMA (64 ~ 160 kbps)
Other Maximum total number of
MP3/WMA files is 1024.
Maximum total number of
folders is 255 INCLUSIVE of
root directory.
The ID3TAG information
supported are TITLE, ARTIST
and ALBUM only.
Supports ID3TAG version 1
and version 2.
File system
support Support USB devices with Microsoft Windows/DOS/FAT
12/ FAT 16/ FAT 32.
2 kbyte block length for sector.
Tuner
Frequency range FM:87.5 - 108 MHz
AM: 530 - 1,720 kHz
Speaker
Type
Front Speaker
Subwoofer
2-way type speaker system
2" (5 cm) tweeter
5-1/8" (13 cm) woofer
Type Subwoofer system
8" (16 cm) woofer
Maximum input
power 200 W
Maximum input
power 300 W
Rated input power 100 W
Rated input power 150 W
Impedance 4 ohms
Impedance 8 ohms
Dimensions Width: 7-1/16" (180 mm)
Height: 11-13/16" (300 mm)
Depth: 8" (204 mm)
Dimensions Width: 9-1/16" (230 mm)
Height: 11-13/16" (300 mm)
Depth: 12" (305 mm)
Weight 6.0 lbs.(2.7 kg)/each
Weight 9.7 lbs. (4.4 kg)
1 – 2

CD-SW440N
–2
[4] Names Of Parts
1. iPod Docking Station
2. Disc Tray
3. Remote Sensor
4. Timer Indicator
5. Power On/Stand-by Button
6. Audio In Jack
7. Headphone Jack
8. USB Terminal
9. Volume Control
10. FUNCTION Button
11. Disc / USB / iPod Play or Pause / Tape Play /
Tuning Up Button
12. Disc / USB / Tape Stop / Tuning Down Button
13. Disc Tray Open / Close Button
14. Cassette Compartment
1. MP3/WMA Folder Indicator
2. MP3/WMA Title Indicators
3. MP3 Indicator
4. WMA Indicator
5. Sleep Indicator
6. Once Timer Play Indicator
7. MP3/WMA Total Indicator
8. Daily Timer Play Indicator
9. FM Stereo Mode Indicator
10. FM Stereo Receiving Indicator
11. Tape play Indicator
12. Memory Indicator
13. Extra Bass Indicator
14. Disc/USB Repeat Play Indicator
15. Disc/USB Pause Indicator
16. Disc/USB Play Indicator
FUNCTION
FUNCTION
AUDIO IN
AUDIO IN
PHONES
PHONES
VOL
VOL
POWER
POWER
ON/STAND-BY
ON/STAND-BY
MINI COMPONENT SYSTEM
CD-DH790
PUSH
PUSH
OPEN
OPEN
13
14
10
9
11
12
1
2
3
5
6
7
8
4
1234 5
8910
11
7
12
13 14
15 16
6
Front panel
Display
1. Subwoofer
2. Bass Reflex Duct
3. Subwoofer Light-Up Wire
4. Speaker Wire
1
23 4
1. Tweeter
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
5. Speaker Light-Up Wire
1
54
3Front speaker system
Subwoofer
2
1 – 3

CD-SW440N
– 4
1. Remote Control Transmitter
2. On/Stand-by Button
3. Direct Search Buttons
4. Play Mode Button
5. iPod Display (TV OUT) Button
6. Disc/USB Stop Button
7. Disc/USB Display Button
8. Bass/Treble Button
9. Volume Up or Down Buttons
10. Memory Button
11. Clear/Dimmer Button
12. Folder Button
13. Tuning Up, iPod Cursor Up Button
14. CD Track Down or Fast Reverse, Time Down Button
15. Enter Button
16. Tuning Down, iPod Cursor Down Button
17. Demo Button
18. iPod Button
19. Disc Button
20. USB Button
21. Audio In Button
22. Open/Close Button
23. iPod Menu Button
24. iPod Play/Pause Button
25. Disc/USB Play/Pause Button
26. X-Bass Button
27. Equaliser Mode Button
28. Clock/Timer Button
29. Sleep Button
30. Tuner Preset Up Button
31. CD Track Up or Fast Forward, Time Up Button
32. Tuner Preset Down Button
33. Tape Button
34. Tape Play Button
35. Tape Stop Button
36. Tuner (Band) Button
CD
USB
TAPE
27
28
29
30
35
36
33
34
31
32
26
22
24
25
9
8
10
11
12
13
14
15
18
17
16
19
20
21
4
2
3
5
6
7
1
23
Remote control
1 – 4

CD-SW440N
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 90 g
Torque Meter Specified Value
Play: TW-2111 29 to 75 g.cm
Fast Forward: TW-2231 55 to 170 g.cm
Rewind: TW-2231 55 to 170 g.cm
Test Tape Adjusting
Point Specified Value Instrument Connection
Normal
speed MTT-111 Variable Resistorin
motor.
3,000 ±90 Hz
Speaker Speaker Terminal
(Load
resistance:
6 ohms)
Tape Motor
Variable Resistor in motor
TAPE MECHANISM

CD-SW440N
3 – 1
CD-ES700/CD-ES77CD-ES700/CD-ES77Service ManualCD-ES700/CD-ES77MarketE
CHAPTER 3. MECHANISM BLOCKS
[1] 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 outlet 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.
Note:
After removing the connector for the optical pickup from the connector,
wrap the conductive aluminium foil around the front end of the connector
so as to protect the optical pickup from electrostatic damage.
Figure 2
Figure 3
Figure 1
Top Cabinet
iPod PWB
CD Servo PWB
CD Changer Unit
(C1) x 2
M3 x 10mm
(E3) x 1
(D1) x 1
Special Screw
iPod
Transit PWB
(E2) x 1
(D2) x 2
(G2) x 1
Front Panel
Hook
(E1) x 1
Hook
(E1) x 1
(G3) x 1
(F1) x 9
M3 x 10mm
(B1) x 2
M3 x 10mm
(B1) x 2
M3 x 10mm
(B1) x 2
M3 x 10mm
(A1) x 1
M3 x 12mm
(A1) x 2
M3 x 12mm
(B1) x 2
M3 x 10mm
(A1) x 2
M3 x 12mm
Side Panel (Left)
Side Panel
(Right)
(H1) x 1
Special Screw
(H1) x 1
Special Screw
PULL
PULL
Power PWB
Rear Panel
Front Panel
Top Cabinet
Rear Panel
Fan Motor
Main PWB
Lug wire
(A2) x 1
iPod PWB
STEP REMOVAL PROCEDURE FIGURE
1 Top Cabinet 1. Screw
..........................
2. Flat Cable....................
(A1)x5
(A2)x1
1
3
2Side Panel (Left/
Right)
2. Screw
..........................
(B1)x8 1
31. Screw
..........................
(C1)x2 2
4 iPod Transit PWB 1. Screw
..........................
2. Socket .........................
(D1)x1
(D2)x2
3
5 CD Changer unit 1. Hook
...........................
2. Socket ..........................
3. Flat Cable .....................
(E1)x2
(E2)x1
(E3)x1
3
6Rear Panel with
Fan motor
1. Screw
...........................
(F1)x9 3
7 Front Panel 1. Screw
..........................
2. Flat Cable ...................
3. Socket ........................
4. Hook ...........................
(G1)x2
(G2)x2
(G3)x4
(G4)x2
4
3,4
3,4
4
8MainPWB 1. Screw
..........................
2. Socket .........................
(H1)x4
(H2)x1
3, 4
4
9PowerPWB 1. Screw
..........................
(J4)x4 4
10 Tape Mechanism 1. Screw
..........................
2. Flat Cable ....................
(K1)x6
(K2)x1
5
11 Audio In PWB 1. Screw
..........................
(L1)x1 6
12 Display PWB 1. Knob
...........................
2. Nut ..............................
3. Washer ........................
4. Screw ..........................
(M1)x1
(M2)x1
(M3)x1
(M4)x4
6
13 CD PWB 1. Screw
..........................
2. Flat Cable ....................
3. Socket .........................
(N1)x2
(N2)x2
(N3)x1
7
14 Changer
Mechanism Unit
1. Screw
..........................
2. Changer Chassis .........
(P1)x4
(P2)x1
8
15 CD Mechanism 1. Screw
..........................
(Q1)x4 9

CD-SW440N
3 – 2
Power PWB
(J1) x 4
M4 x 8mm
(G1) x 2
M3 x 8mm
(N1) x 2
M3 x 10mm
(P1) x 4
M3 x 10mm
CD PWB
(N2) x 1
(N3) x 1
(N2) x 1
(H2) x 1
(K2) x 1
(M2) x 1
(M3) x 1 (M1) x 1
(K1) x 6
M3 x 10mm
(M4) x 4
M2.6 x 10mm
(H1) x 2
M3 x 6mm
(G3) x 1 (G3) x 2
(G2) x 1
Front Panel
Front Panel
Front Panel
Audio In PWB
(L1) x 1
Special Screw
(Q1) x 4
Special
(P2) x 1
Display PWB
Tap e
Mechanism
Lug wire
Display PWB
Hook
(G4) x 1
Hook
(G4) x 1
PULL
PULL
Figure 4
Figure 5
Figure 6 Figure 9
Figure 8
Figure 7
CD Mechanism
Changer
Mechanism
Unit
Changer
Mechanism
Unit
Changer
Mechanism
Unit

CD-SW440N
3 – 3
Screwdriver
Figure 10
(B1) x 4
M4 x 16mm
Front Panel Ass’y
(A1) x 1
(A2) x 1
FROM BOX ASSY
(A3 ) x 2
M3 x 10mm
(C1) x 2
M3 x 10mm
Tweeter TO
LED PWB
Speaker Box
Woofer
LED PWB
ERUGIFPETS
………Front Panel Assy.11 … (A1)X1 10
2. Socket…….…………..… (A2)X1
3. Screw…….…….…….…. (A3)X2
2 Woofer 1. Screw…….…….…….…. (B1)X4 10
3 Tweeter 1. Screw…….……….....…. (C1)X2 10
PROCEDURE
CP-S440N
LED PWB
REMOVAL
CAUTION:
TO REMOVE SPEAKER UNIT, PRESS THESE LOCKING TABS
TO RELEASE SPEAKER WIRES.
SPEAKER UNIT
LOCKING TAB
LOCKING TAB
SPEAKER WIRE

CD-SW440N
3 – 4
Figure 11
LED PWB
(A3) x 2
M2.6 x 8mm
(A2) x 1
FROM BOX ASSY
(A1) x 1
Front Panel Ass’y
(B1) x 4
M4 x 16mm
Subwoofer
Speaker Box
TO
LED
PWB
Screwdriver
ERUGIFPETS
1 LED PWB 1. Front Panel Assy………
…
(A1)X1 11
2. Socket…….…………..… (A2)X1
3. Screw…….…….…….…. (A3)X2
2 Woofer 1. Screw…….…….…….…. (B1)X4 11
PROCEDUREREMOVAL
CP-SW440N
CAUTION:
TO REMOVE SPEAKER UNIT, PRESS THESE LOCKING TABS
TO RELEASE SPEAKER WIRES.
SPEAKER UNIT
LOCKING TAB
LOCKING TAB
SPEAKER WIRE

CD-SW440N
4 – 1
CHAPTER 4. DIAGRAMS
[1] Main Block Diagram
L927
R
L
R
L
6A 125V
6A 125V
2A 125
V
2A 125
V
1.6A 12
5
2
2
+13V
+B3
SYS_PROTECT
Q852
Q905
Q901
5
8
+B3
1
23 56
IC503
87
16 11 13 23
10
4
L_OUT
R_OUT
2
19
21
+-
Figure 4-1: MAIN BLOCK DIAGRAM (1/2)

CD-SW440N
4 – 2
R
L
6A 125V
6A 125V
2A 125V
2A 125V
1.6A 125V
14
12
17
15
8
9
10
11 3
7
2
5A 125V
120V ~ 60Hz
L844
ZA016AW
Q503
CNP300N302
SPEAKER
LED
Q906 M FAN MOTOR
+B3
Figure 4-2: MAIN BLOCK DIAGRAM (1/2)

CD-SW440N
5 – 1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Waveforms Of Servo Circuit
U10 U10
U10
U10
U10
Figure 1 Figure 2
U10 U10
U10 U10
Figure 3 Figure 4
U10
U10
U10 U10
Figure 5 Figure 6
1
126
2
RFO
9
10
5
1
3
6
7
1
4
FOO
TRO
127
1
126
13
14
4
FOO
FE
TE
TE
FOO
126
14 126
123
FOO
DMO
LINEOUTL
LINEOUTR
33
36
DM
DP
52
53

CD-SW440N
5 – 2
[2] Voltage
IC701 IC851 IC702
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
1 -26.66 33 -26.68 1 5.12 1 12.13
2 -26.66 34 -29.10 2 13.03 2 12.23
3 -26.66 35 -26.68 3 18.53 3 3.79
4 -26.66 36 -21.10 4 0.00 4 2.49
5 3.15 37 -17.68 5 19.65 5 0.50
6 3.15 38 -22.10 6 10.05 6 0.50
7 3.06 39 -29.10 7 8.51 7 0.50
8 3.15 40 -24.25 8 0.50
9 3.15 41 -19.40
10 3.15 42 -26.66 IC852
11 3.15 43 -24.25 IC604
12 1.45 44 -24.57
13 1.45 45 -24.27 1 11.05
14 0.00 46 -19.43 2 0.69 1 5.10
15 -17.50 47 -26.68 3 5.70 2 5.06
16 -29.09 48 -26.68 3 4.94
17 -29.10 49 -29.10 4 0.00
18 -29.10 50 -22.10 IC853 5 4.94
19 -29.10 51 -22.10 6 5.06
20 -29.10 52 3.15 7 5.09
21 -29.10 53 -29.10 1 5.12 8 10.04
22 -26.90 54 -29.10 2 5.12
23 -15.26 55 -29.10 3 3.29
24 -29.25 56 -29.10 4 1.92 IC603
25 -29.10 57 -26.68 5 0.00
26 -29.10 58 -26.68 6 0.00
27 -19.75 59 -26.68 7 0.00 1 2.02
28 -29.10 60 -26.68 8 0.00 2 2.02
29 -19.70 61 -26.68 3 2.02
30 -21.84 62 -26.68 4 0.00
31 -19.55 63 -26.68 IC902 5 2.02
32 -15.23 64 -26.68 6 2.02
7 2.04
1 0.00 8 5.12
2 5.12
IC901 3 2.52 IC855
4 2.57
5 2.42
1 2.53 13 -24.48 6 2.52 1 0.50
2 0.00 14 0.00 7 0.00 2 5.70
3 2.44 15 11.45 8 5.12 3 3.16
4 24.15 16 24.35 9 0.00 4 0.00
5 0.00 17 -24.29 10 2.54 5 3.17
6 -24.08 18 -24.15 11 2.57 6 5.09
7 -15.95 19 0.00 12 5.12 7 5.70
8 24.17 20 24.09 13 0.00 8 3.17
9 11.46 21 0.00 14 5.12
10 0.00 22 0.00
11 -24.38 23 2.67
12 -12.10
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)

CD-SW440N
5 – 3
U10
PIN
NO
VOLTAGE
(V)
PIN
NO VOLTAGE
(V)
PIN
NO VOLTAGE
(V)
PIN
NO VOLTAGE
(V)
1 3.38 33 1.53 65 1.23 97 NC
2 1.79 34 1.53 66 NC 98 NC
3 1.58 35 1.53 67 NC 99 0.71
4 1.60 36 1.53 68 NC 100 NC
5 1.60 37 0.00 69 NC 101 NC
6 1.60 38 3.34 70 141m 102 NC
7 1.60 39 NC 71 0.00 103 1.25
8 3.39 40 NC 72 NC 104 0.72
9 1.59 41 NC 73 NC 105 0.72
10 1.19 42 NC 74 NC 106 NC
11 0.00 43 NC 75 NC 107 NC
12 1.12 44 NC 76 NC 108 NC
13 1.18 45 0.77 77 NC 109 NC
14 1.38 46 1.53 78 NC 110 0.00
15 0.81 47 0.77 79 NC 111 5.80
16 3.34 48 1.53 80 NC 112 0.00
17 3.34 49 1.72 81 NC 113 3.34
18 1.79 50 2.11 82 NC 114 0.00
19 1.67 51 2.08 83 NC 115 1.77
20 2.31 52 30.4m 84 0.00 116 3.34
21 0.00 53 2.82 85 3.34 117 NC
22 0.00 54 3.34 86 0.72 118 NC
23 3.33 55 0.00 87 NC 119 NC
24 1.78 56 0.00 88 NC 120 1.58
25 3.34 57 3.34 89 NC 121 1.57
26 1.27 58 0.00 90 NC 122 3.34
27 0.72 59 2.19 91 NC 123 1.57
28 0.00 60 0.00 92 1.30 124 0.00
29 1.77 61 0.41 93 1.13 125 NC
30 0.00 62 3.34 94 0.71 126 1.57
31 1.53 63 3.34 95 0.71 127 1.57
32 1.53 64 1.22 96 NC 128 233m
IC401 IC503
1 0.00 9 0.00 17 25.80m
2 0.00 10 200.10m 18 0.00
3 0.00 11 0.00 19 0.00
4 0.78 12 0.00 20 2.80
5 2.79 13 6.87 21 0.77
6 0.00 14 4.13 22 0.00
7 0.00 15 0.00 23 0.00
8 25.80m 16 0.00 24 0.00
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
IC301
1 2.53 9 11.46 17 -24.29
2 0.00 10 0.00 18 -24.15
3 2.44 11 -24.38 19 0.00
4 24.15 12 -12.10 20 24.09
5 0.00 13 -24.48 21 0.00
6 -24.08 14 0.00 22 0.00
7 -15.95 15 11.45 23 2.67
8 24.17 16 24.35
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
PIN
NO
VOLTAGE
(V)
1 6.11
2 6.11
3 6.05
4 0.00
5 1.64
6 1.65
7 1.64
8 12.19
PIN
NO
VOLTAGE
(V)

CD-SW440N
6 – 1
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Notes On Schematic Diagram
[2] Types Of Transistor And LED
• 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 resis-
tor. 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 sym-
bol 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
VR701 VOLUME MAX -- MIN
DESCRIPTION POSITION
• 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 Digi-
tal Multimeter between such a section and the chassis with no sig-
nal given.
1. In the tuner section,
indicates AM
indicates FM stereo
2. In the main section, a tape is being playback.
3. In the power section, a tape is being playback.
4. In the CD section, the CD is stopped.
•
taining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the
set.
SW701 ON/STAND-BY ON -- OFF
SW702 FUNCTION ON -- OFF
SW703 DISC/USB/TAPE STOP/TUNING DOWN ON -- OFF
SW704 DISC/USB/iPod PLAY or PAUSE/
TAPE PLAY/TUNING UP
ON -- OFF
SW705 OPEN/CLOSE ON -- OFF
Parts marked with “ ” ( ) are important for main-
KRA102S
KRC107
KRC104S
H1A
KTA1504GR
KTC3875GR
KRA107S
B
(3)
E
(1)
C
(2)
TOP
VIEW
TOP VIEW
TOP VIEW
S8550
KTA1274Y
S8050
KTC3199
KTA1266
KTC3203Y
VIEW
FRONT
ECB
(S)(G)(D)
VIEW
FRONT VIEW
FRONT
VIEW
FRONT
1
BCE
(1)(2)(3)
1N4004
DRL204F
MA111
TOP VIEW
HSS4148
FRONT
VIEW
343VC3F
TDA8920CJ
B772
KIA7805A
050N60P
BCE
HD
10XB60F
AC AC -+
23

CD-SW440N
6 – 2
[3] Schematic Diagram
Figure 6-1: MAIN SCHEMATIC DIAGRAM (1/6)
FM SIGNAL
CD SIGNAL
AUDIO SIGNAL
iPod SIGNAL
MAIN PWB-A
HEADPHONES IN
TO SERVO PWB
USB IN
TO SERVO PWB
JP24
0.1
LUG1
C875
0.1
LUG1
A
B
C
D
E
F
G
H
123456

CD-SW440N
6 – 3
Figure 6-2: MAIN SCHEMATIC DIAGRAM (2/6)
78 9 10 11 12

CD-SW440N
6 – 4
Figure 6-3: MAIN SCHEMATIC DIAGRAM (3/6)
FAN
MOTOR
TO
SPEAKER SYSTEM
13 14 15 16 17 18