AIWA CDC606 Service Manual

CD-C606/1900,CP-C606/1900

SERVICE MANUAL

No. S3909CDC606//

CD-C606
CD-C1900

Illustration: CD-C606

CP-C606
CP-C1900

CD-C606 mini component system consisting of
CD-C606 mini component system and
CP-C606 speaker system

CD-C1900 mini component system consisting of
CD-C1900 mini component system and
CP-C1900 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.

CONTENTS

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

OPERATION MANUAL ...................................................................................................................................................... 5

QUICK GUIDE ................................................................................................................................................................... 6

DISASSEMBLY.................................................................................................................................................................. 8

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 10

ADJUSTMENT ................................................................................................................................................................. 11

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13

TYPE OF TRANSISTER AND LED ................................................................................................................................. 13

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 14

BLOCK DIAGRAM ........................................................................................................................................................... 15

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................18

VOLTAGE ........................................................................................................................................................................ 32

TROUBLESHOOTING ..................................................................................................................................................... 33

FUNCTION TABLE OF IC................................................................................................................................................ 37

FL SEGMENT ...................................................................................................................................................................42

PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (FOR U.S.A. ONLY)

Page

SHARP CORPORATION

– 1 –

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

CD-C606/1900,CP-C606/1900

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

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).

VTVM

AC SCALE

1.5k ohms
10W

0.15µF

TO EXPOSED
METAL PARTS

* 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.

TEST PROBE

CONNECT TO
KNOWN EARTH
GROUND

CD-C606/1900

SPECIFICATIONS

General

●

Power source: AC 120 V, 60 Hz
Power consumption: Stand-by; 0.3 W

Power on; 40 W

Dimensions: Width; 10-5/8" (270 mm)
(For U.S.A.)

Dimensions: Width; 270 mm (10-5/8")
(For Canada)

Weight: 10.3 lbs (4.7 kg)
(For U.S.A.)

Weight: 4.7 kg (10.3 lbs)

(For Canada)

●

Amplifier section

Output power: 10 watts minimum RMS per
(For U.S.A.)

Output power: MPO; 36 W (18 W + 18 W)
(For Canada)

Output terminals: Speakers; 8 ohms

T uner section

●

Frequency range: FM; 87.5-108 MHz

Height; 11-13/16" (300 mm)
Depth; 13-7/8" (353 mm)

Height; 300 mm (11-13/16")
Depth; 353 mm (13-7/8")

channel into 8 ohms from 80 Hz to
20 kHz, 10% total harmonic
distortion

(10% T .H.D.)
RMS; 20 W (10 W + 10 W)
(10% T .H.D.)

Headphones; 16-50 ohms
(recommended; 32 ohms)

AM; 530-1,720 kHz

●

Cassette deck section

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: 0.15 % (WRMS)

Compact disc player section

●

Type: 3-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)

CP-C606/1900

Speaker section

●

Type: 2-way [4” (10cm) woofer and

super tweeter]

Maximum input
power: 20 W

Rated input power: 10 W
Impedance: 8 ohms
Dimensions: Width; 8-11/16" (220 mm)

(For U.S.A.)

Height; 11-13/16" (300 mm)
Depth; 7-1/16" (180 mm)

Dimensions: Width; 220 mm (8-11/16")
(For Canada)

Height; 300 mm (11-13/16")
Depth; 180 mm (7-1/16")

Weight:(For U.S.A.) 4.4 lbs. (2.0 kg)/each

Weight:(For Canada) 2.0 kg (4.4 lbs.)/each

Specifications for this model are subject to change without prior
notice.

– 2 –

CD-C606/1900,CP-C606/1900

123

X-BASS

kHz
MHz

SLEEP

STMEMORY

REC

4567

8

1314

91011

12

19

21

25

16

23
24

22

20

27

17

26

18

28 29

30 31

1

23

15

CD-C606/1900

Front panel

■

1. Disc T ray

2. Disc Skip Button

3. Open/Close Button

4. Disc Number Indicator

5. Record Indicator

6. Sleep Indicator

7. Extra Bass Indicator

8. Function/CD Trac k/CD Counter/Frequency/

9. Memory Indicator

10. FM Stereo Mode Indicator

11. FM Stereo Indicator

12. CD Repeat Indicator

13. CD Play Indicator

14. CD Pause Indicator

15. Timer Indicators

Preset Channel/Volume/Timer/Sleep Time
Indicator

NAMES OF PARTS

16. (TAPE 2) Record Pause Button

17. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button

18. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Foward Button

19. Timer/Sleep Button

20. Clock Button

21. Power Button

22. Function Selector Buttons

23. Extra Bass/Demo Button

24. Volume Up/Down Buttons

25. Memory/Set Button

26. (CD/TAPE) Stop Button

27. (CD) Play/Repeat Button
(TAPE) Play Button

28. Tuning and Time Up/Down Buttons

29. Headphone Socket

30. (TAPE 1) Cassette Compartment

31. (TAPE 2) Cassette Compartment

– 3 –

CD-C606/1900,CP-C606/1900

CD-C606/1900

■

Rear panel

1. AC Power Input Socket

2. Speaker Terminals

3. FM/AM Loop Aerial Socket

CP-C606/1900

■

Speaker

4. Super Tweeter

5. Woofer

6. Bass Reflex Duct

7. Speaker Wire

4
5

6

1
2

3

CD-C606/1900

■

Remote control

1. Remote Control Transmitter LED

●

CD control section

2. Disc Number Select Buttons

3. Memory Button

4. Pause Button

5. Clear Button

6. Track Down/Review Button

7. Track Up/Cue Button

8. Disc Skip Button

9. Play/Repeat Button

10. Stop Button

11. Random Button

●

Tuner control section

12. Preset Up/Down Buttons

●

Tape control section

13. (TAPE 1) Play Button

14. (TAPE 1/2) Stop Button

15. (TAPE 2) Play Button

16. (TAPE 2) Rewind Button

17. (TAPE 2) Fast Forward Button

18. (TAPE 2) Record Pause Button

19. Function Selector Buttons

20. Power Button

21. Extra Bass Button

22. Volume Up/Down Buttons

2
3

4
5

6
7

18
19
20

21

13

7

1

8

9
10

11
12

14 15 16 17

1

22

– 4 –

SETTING THE CLOCK

(Main unit operation)
In this example, the clock is set for the 12-hour
(AM 12:00) system.

CLOCK

POWER

MEMORY/
SET

2
3
4

– 5 –

5

6

7

8

9

TUNING/
TIME
( )

AM 0:00AM 12:00 0:00

1

Press the POWER button to enter the stand-by mode.

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY/SET button.

4

Press the TUNING/TIME ( or ) button to select the time
display mode.

"AM 12:00" The 12-hour display will appear.
"AM 0:00" The 12-hour display will appear.
"0:00" The 24-hour display will appear.

Note that this can only be set when the unit is first installed or
it has been reset (see page 13).

5

Press the MEMORY/SET button.

6

Press the TUNING/TIME ( or ) button to adjust the hour.
Press the TUNING/TIME ( or ) button once to advance

the time by 1 hour. Hold it down to advance continuously.
When the 12-hour display is selected, "AM" will change auto-

matically to "PM".

7

Press the MEMORY/SET button.

8

Press the TUNING/TIME ( or ) button to adjust the minutes.
Press the TUNING/TIME ( or ) button once to advance

the time by 1 minute. Hold it down to change the time in 5
minute intervals.

The hour setting will not advance even if minutes advance
from "59" to "00".

9

Press the MEMORY/SET button.
The clock starts operating from "0" seconds. (Seconds are not

displayed.)

Note:

In the event of power failure or when the AC power cord is
disconnected, the clock display will go out.
When the AC power supply is restored, the clock display will
flash on and off to indicate the time when the power failure
occurred or when the AC power cord was disconnected.
If this happens, follow the procedure below to change the clock
time.

To change the clock time:

1

Press the CLOCK button.

2

Within 5 seconds, press the MEMORY/SET button.

3

Perform steps 6 - 9 above.

To see the time display:

Press the CLOCK button.

The time display will appear for about 5 seconds.

To change the time display mode:

1

Perform steps 1 - 2 in the section "RESETTING THE MICRO
COMPUTER".

2

Perform steps 1 - 9 above.

(AM 12:00 - PM 11:59)
(AM 0:00 - PM 11:59)
(0:00 - 23:59)

PREPARATION FOR USE

8" - 20'

(0.2 m - 6 m)

15

15

15

1

RESETTING THE MICROCOMPUTER

2

1,2

Remote control

■

Notes concerning use:

●

Replace the batteries if the operating distance is reduced or if
the operation becomes erratic.

●

Periodically clean the transmitter LED on the remote
control and the sensor on the main unit with a soft cloth.

●

Exposing the sensor on the main unit to strong light may inter­fere with operation. Change the lighting or the direction of the
unit.

●

Keep the remote control away from moisture, excessive heat,
shock, and vibrations.

Reset the microcomputer under the following conditions:

●

To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).

●

If the display is not correct.

●

If the operation is not correct.

1

Press the POWER button to enter the stand-by mode.

2

Press and hold down the / button and the /
button, hold down the POWER button for at least 1 second.

Caution:

●

The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
preset.

OPERATION MANUAL

CD-C606/1900,CP-C606/1900

Preparation for use

Preparación para su uso

Right speaker

Altavoz derecho

MINI COMPONENT
SYSTEM

CD-C606

Left speaker

Altavoz izquierdo

● AM Loop Antenna

●

Antena de cuadro de
AM

Quick-Guide
Guía rápida

● FM Antenna

●

Antena de FM

Tape playback

Reproducción de cintas

C D

TAPE

(1 2)

TUNER

(BAND)

TAPE 1

TAPE 2

CD playback

Reproducción de discos compactos

CD-C606/1900,CP-C606/1900

Black

Negro

Red

Rojo

SPEAKERS

RATED SPEAKER IMPEDANCE:

8 OHMS MIN.

RIGHT

Red

Rojo

LEFT

– 6 –

Turning the power on and off

Conexión y desconexión de la alimentación

POWER

POWER

Remote control

Control remoto

● 2 “AA” batteries

●

Dos pilas “AA”

● Batteries are not
included.

Las pilas no están

●

incluidas.

Black

Negro

1

Remote Sensor

Sensor remote

8" - 20' (0.2m - 6m)

0,2m - 6m

15

15

1

● AC 120 V, 60 Hz

●

120 V de CA, 60 Hz

Sound control

Control del sonido

● Volume

●

Volumen

VOLUME

● Extra-BASS

●

Graves extra

X-BASS

/DEMO

VOLUME

X-BASS

(1 2)

TAPE

C D

TUNER

(BAND)

OPEN

/CLOSE

● Label facing up

Etiqueta hacia arriba

●

Radio operation

Funcionamiento de la radio

TAPE

(1 2)

C D

TUNER

FM STERO

(BAND)

FM MONO

ST

Recording from CDs

Grabación de discos compactos

C D

TAPE

(1 2)

TUNER

(BAND)

● Load the disc to be
recorded.

●

Introduzca el disco que
va a grabar.

TAPE 2

Precaution

Precaución

● The sound level at a given volume setting
depends on a combination of speaker efficiency,
location and many other factors. It is advisable
to avoid exposure to high volume levels, which
occur while turning the unit on with the volume
control setting up high, or while continually
listening at high volume levels.

● Only discs bearing the logo as shown can be
played in this unit.

OPEN

/CLOSE

AM

REC PAUSE

● CD recording starts.

La grabación de CD

●

empieza.

●

El nivel de sonido en una posición de volumen
fijado depende de una combinación del
rendimiento de las altavoces, la posición y
muchos otros factores. Es aconsejable e vitar un
aumento de volumen. Esto se produce, por
ejemplo, al conectar el aparato con el volumen
puesto en una posición alta. Evite continuar la
audición prolongada a altos niveles de sonido.

●

En este aparato sólo pueden reproducirse los
discos que tengan el logotipo mostrado.

TUNING

/TIME

QUICK GUIDE

Preparation for use

Preparación para su uso

Right speaker

Altavoz derecho

MINI COMPONENT
SYSTEM

CD-C1900

Left speaker

Altavoz izquierdo

● AM Loop Antenna

●

Antena de cuadro de
AM

Quick-Guide
Guía rápida

● FM Antenna

●

Antena de FM

Tape playback

Reproducción de cintas

C D

TAPE

(1 2)

TUNER

(BAND)

TAPE 1

TAPE 2

CD playback

Reproducción de discos compactos

Black

Negro

Red

Rojo

SPEAKERS

RATED SPEAKER IMPEDANCE:

8 OHMS MIN.

RIGHT

Red

Rojo

LEFT

– 7 –

Turning the power on and off

Conexión y desconexión de la alimentación

POWER

POWER

Remote control

Control remoto

● 2 “AA” batteries

●

Dos pilas “AA”

● Batteries are not
included.

Las pilas no están

●

incluidas.

Black

Negro

1

Remote Sensor

Sensor remote

8" - 20' (0.2m - 6m)

0,2m - 6m

15

15

1

● AC 120 V, 60 Hz

●

120 V de CA, 60 Hz

Sound control

Control del sonido

● Volume

Volumen

●

● Extra-BASS

●

VOLUME

Graves extra

X-BASS

/DEMO

VOLUME

X-BASS

(1 2)

TAPE

C D

TUNER

(BAND)

OPEN

/CLOSE

● Label facing up

●

Etiqueta hacia arriba

Radio operation

Funcionamiento de la radio

(1 2)

TAPE

C D

TUNER

FM STERO

(BAND)

FM MONO

ST

Recording from CDs

Grabación de discos compactos

C D

TAPE

(1 2)

TUNER

(BAND)

● Load the disc to be
recorded.

Introduzca el disco que

●

va a grabar.

TAPE 2

Precaution

Precaución

● The sound level at a given volume setting
depends on a combination of speaker efficiency,
location and many other factors. It is advisable
to avoid exposure to high volume levels, which
occur while turning the unit on with the volume
control setting up high, or while continually
listening at high volume levels.

● Only discs bearing the logo as shown can be
played in this unit.

OPEN

/CLOSE

AM

REC PAUSE

● CD recording starts.

●

La grabación de CD
empieza.

●

El nivel de sonido en una posición de volumen
fijado depende de una combinación del
rendimiento de las altavoces, la posición y
muchos otros factores. Es aconsejable e vitar un
aumento de volumen. Esto se produce, por
ejemplo, al conectar el aparato con el volumen
puesto en una posición alta. Evite continuar la
audición prolongada a altos niveles de sonido.

●

En este aparato sólo pueden reproducirse los
discos que tengan el logotipo mostrado.

TUNING

/TIME

CD-C606/1900,CP-C606/1900

CD-C606/1900,CP-C606/1900

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
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.

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

CD-C606/1900

STEP REMOVAL

1 Top Cabinet 1. Screw ..................... (A1) x4 8-1

2 Side Panel 1. Screw ..................... (B1) x4 8-1

(Left/Right) 2. Screw ..................... (B2) x2

3 CD Tray Cover/ 1. Turn on the power supply, 8-2

CD Player Unit open the disc tray, take out

4 Back Board 1. Screw ..................... (D1) x3 8-2

5 Main PWB/ 1. Screw ..................... (E1) x11 9-1

Display PWB/ 2. Screw ..................... (E2) x1

Switch PWB/ 3. Screw ..................... (E3) x1

Headphones PWB

6 Front Panel 1. Screw ..................... (F1) x2 9-1

7 Tape Mechanism 1. Open the cassette holder. 9-2

8 CD Servo PWB 1. Screw ..................... (H1) x1 9-3

(Note 2) 2. Socket .................... (H2) x4

9 Turntable 1. Screw ..................... (J1) x1 9-4

10 Disc Tray 1. Screw ..................... (K1) x2 9-4

11 CD Changer 1. Screw..................... (L1) x4 9-5

Mechanism

12 CD Mechanism 1. Screw ..................... (M1) x1 9-5

PROCEDURE

2. Hook....................... (A2) x3

3. Hook....................... (B3) x2

the CD tray cover, and close.
(Note 1)

2. Hook....................... (C1) x3

3. Hook....................... (C2) x2

4. Socket .................... (C3) x2

4. Bracket................... (E4) x1

5. Socket .................... (E5) x5

6. Hook....................... (E6) x2

2. Hook....................... (F2) x2

2. Screw...................... (G1) x6

2. Stabilizer ................ (J2) x1

2. Guide ..................... (K2) x2

FIGURE

CD-C606/1900

Hook
(B3x1)

(B2)x1
ø3x12mm

(B1)x2
ø3x12mm

CD Servo
PWB

Disc Tray

CD Player
Unit

(D1)x3
ø3x10mm

(A1)x2
ø3x12mm

Side Panel
(Right)

(C3)x2

1

1

Back Board

Back Board

Hook
(C2)x1

Pull

Top Cabinet

(B1)x2
ø3x12mm

Figure 8-1

Hook
(C1)x3

Main PWB

Figure 8-2

Hook
(B3x1)

(B2)x1
ø3x12mm

Hook
(A2x3)

Front Panel

(A1)x2
ø3x12mm

Side Panel
(Left)

CD Tray Cover

2

Hook

(C2)x1

Pull

Front Panel

Note 1:

How to open the change manually.

1. Then, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom in this state.
After that, push forward the CD player base. (Fig. 8-3)

Note 2:

2. After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the
front end of connector so as to protect the optical pickup
from electrostatic damage.

Lock Lever

Figure 8-3

– 8 –

CD-C606/1900,CP-C606/1900

(L1)x4
ø3 x12mm

(M1)x1
ø2.6 x10mm

CD Changer
Mechanism

CD Mechanism

Shift Lever

CD Player Base

Headphones
PWB

(E2)x1
ø3x10mm

(E3)x1
ø3x10mm

(E4)x1

Main
PWB

(E5)x4

Tape
Mechanism
PWB

Switch PWB

(E1)x11
ø3x10mm

Hook
(F2)x1

Figure 9-1

Display PWB

(E5)x1

Front Panel

Hook
(E6)x2

Hook
(F2)x1

Tape
Mechanism

(F1)x2
ø3x10mm

(J1)x1
ø3 x10mm

(J2)x1

Washer

Turntable

Disc Tray

(K1)x1
ø3 x10mm

(K2 x1

(K1)x1
ø3 x10mm

CD Player Unit

(K2)x1

Figure 9-4

(G1)x6
ø3x10mm

(H2)x2

Front Panel

Figure 9-2

Cassette
Holder
(Left/Right)

Open

Tape
Mechanism

(H1)x1
ø3 x10mm

CD Servo
PWB

Be careful when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.

Figure 9-5

(H2)x2

Figure 9-3

CD Player Unit

– 9 –

CD-C606/1900,CP-C606/1900

CP-C606/1900

STEP REMOVAL

1 Speaker 1. Net .......................... (A1) x1 10-1

2. Duct Panel ..............(A2) x1

3. Screw...................... (A3) x4 10-2

PROCEDURE

FIGURE

CP-C606/1900

(A1)x1

(A2)x1

Speaker Box

Driver should be

Driver

pried away from
Speaker Box.

Direction of handle

Figure 10-1

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3, and 8 ~ 12 of the disassembly method
to remove the CD mechanism.

How to remove the turntable up/down/loading
motor (See Fig. 10-3)

1. Remove the screws (A1) x 2 pcs., to remove the turntable
up/down/loading motor.

Super
Tweeter

Woofer

(A3)x4
ø3.5x13mm

Turntable Up/Down/
Loading Motor

Motor
PWB

Speaker Box

Figure 10-2

How to remove the pickup (See Fig. 10-4)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2)
x 1 pc.

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4) x 1 pc.

3. Remove the pickup.

Note:
After disconnecting the optical pickup connector wrap the
front end of connector in conductive aluminum foil so as to
prevent damage to the optical pickup by static electricity.

– 10 –

(B1) x2
ø2.6 x6mm

(B2) x1

(A1) x2
ø2.6 x5mm

Figure 10-3

(B3) x1

Pickup

CD Mechanism

(B4) x1

Figure 10-4

ADJUSTMENT

Pin 13 of IC303

Pin 21 of IC303

D

G

S

10 kΩ

TO FREQUENCY
COUNTER

FET : 2SK19 or 2SK54

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

Tape 1

Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 60 to 120 g.cm
Rewind: TW-2231 — 60 to 120 g.cm

Specified Value

Tape 2: Over 80 g

Specified Value

Tape 2

CD-C606/1900,CP-C606/1900

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

IF 450 kHz 1,720 kHz T382 *1
Band — 530 kHz (fL): T333 *2

Coverage 1.1 ± 0.1 V
Tracking 990 kHz 990 kHz (fL): T331 *1

*1. Input: Antenna (CNP301), Output: TP301
*2. Input: Antenna (CNP301), Output: TP302

Frequency Frequency

Display

Setting/

Adjusting

Parts

Instrument

Connection

• Tape Speed

Test Tape

Adjusting

Point

Specified

Value

Normal MTT-111 Volume in 3,000 ± Speaker
speed motor 30 Hz terminal

(MM1) (Load

Instrument

Connection

resistance:
8 ohms)

TAPE MECHANISM

MM 1
Motor

Volume in motor

Figure 11-1 ADJUSTMENT POINTS

IC301

11

IC302

12

C354

TP301

VR381

TP302

VCO

Figure 11-2 ADJUSTMENT POINTS

1

22

12

13
C386

FM DET

FM Band
Coverage
fL

T301

CF351

T382

IC303

21

T381

MAIN PWB

9

T302

FM IF

AM IF

1

24

CF301

1

L312

FM RF

AM Tracking
fL

T333

BF301

T331

AM Band
Coverage fL

CNP301
AM LOOP
ANTENNA

– 11 –

• FM RF

Signal generator: 1 kHz, 22.5 kHz dev., FM modulated

Test Stage

Frequency

Frequency

Display

Serring/

Adjusting

Point

Band — 87.50 MHz T301(fL): *1
Coverage 3.4 V ± 50 mV

RF 98.00 MHz 98.00 MHz L312 *2

(10-30 dB)

Instrument
Connection

*1. Input: Antenna (CNP301), Output: TP302
*2. Input: Antenna (CNP301), Output: Speaker terminal

• FM Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Frequency

Stage

Detection 10.7 MHz 98.00 MHz T381 Input: Pin 1 of

IF 10.7 MHz 98.00 MHz T302(Turn Input: Pin 1 of

Frequency

Display

Adjusting

Parts

Instrument

Connection

IC303
Output: TP302

the core of IC301
transformer Output: TP302
T381 fully
counter­clookwise.)

• VCO Frequency

Frequency

Frequency

Display

98.00 MHz 98.00 MHz VR381* Pin 13, Pin 21
(60 dB) and ground

Adjusting

Parts

Instrument

Connection

of IC303

* Adjust for 76 kHz ± 200 Hz.

Notes:

After preparing the test circuit shown in Fig 11-3, connect the
Pin 13 , Pin 21 and ground of the IC303 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.

Figure 11-3

CD-C606/1900,CP-C606/1900

1 2 3

2

1

TO

TE

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TRACKING/
ERROR
BARANCE
ADJUST

TEST MODE

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode
Indication of CD TST mode (Fig. 12-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.

<MEMORY>
LASER ON

<MEMORY>
Tracking on the spot.
SERVO OFF PLAY

<MEMORY>
Tracking on the spot.
SERVO ON PLAY

IL is not performed.

<STOP>

STOP

<PLAY> key input

TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.

Press <STOP> key.

Stop

<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15

Note:

Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory

BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF

Canceling method - POWER OFF

Figure 12-1

CD SECTION

Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.

• Automatic adjustment item

1. Focus offset (Fig. 12-2)

2. Tracking offset (Fig. 12-3)

3. E/F balance (tracking error balance) (Fig. 12-4)

4. RF level AGC function (HF level: constant)

5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is

changed. Therefore, each disc is played back using the
optimal settings.

0.1s

0.50 V
IC1 20 FE

0.1s

0.50 V
IC1 7 TE

Figure 12-2

FOCUS
OFF-SET
ADJUST

TRACKING
OFF-SET
ADJUST

1
2

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 12-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

Figure 12-4

– 12 –

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 micro-micro-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.

CD-C606/1900,CP-C606/1900

• 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 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.

REF. NO DESCRIPTION POSITION POSITION

SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW605 TAPE 1 MAIN ON—OFF
SW606 TAPE 2 MAIN ON—OFF
SW607 TAPE 1 RECORD ON—OFF
SW608 TAPE 1 PLAY ON—OFF
SW701 POWER ON—OFF
SW702 VOLUME UP ON—OFF
SW703 VOLUME DOWN ON—OFF
SW704 PLAY ON—OFF

FRONT

VIEW

FRONT

VIEW

REF. NO DESCRIPTION

SW705 FAST FORWARD ON—OFF
SW706 REWIND ON—OFF
SW707 OPEN/CLOSE ON—OFF
SW708 STOP ON—OFF
SW709 DISC SKIP ON—OFF
SW710 X-BASS ON—OFF
SW711 FUNCTION ON—OFF
SW712 BAND ON—OFF
SW714 MEMORY ON—OFF
SW715 TUNING UP ON—OFF
SW716 TUNING DOWN ON—OFF

FRONT

VIEW

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

2SC2389 SE
KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTA1271 Y
KTA1273 Y
KTC3194 Y
KTC3199 GR
KTC3203 Y

B C E

(D)(G)(S)

(3) (2) (1)

2SA1318

1 2 3

SVC211C
SVC348S

Figure 13 TYPES OF TRANSISTOR AND LED

– 13 –

SLI342UCJ1

CD-C606/1900,CP-C606/1900

5ms

0.50 V

1

1

IC1 20 FE

5ms

5.0 V

2

1

IC1 54 DRF

WAVEFORMS OF CD CIRCUIT

STOP PLAY

FOCUS SERCH

3
1

6

1

7

1

8

1

9

1

0.5ms

10.0 V
IC1 33 JP+

0.5ms

10.0 V
IC1 32 JP-

0.5ms

0.50 V
IC1 14 JP

0.5ms

1.00 V
IC1 7 TE

3

1

4

1

5

1

3

1

4

1

5

1

6

1

7

1

8

1

9

1

0.5ms

1.00 V
IC1 41 HF

0.5ms

5.0 V
IC1 4 HFL

0.5ms

5.0 V
IC1 36 TES

0.5ms

1.00 V
IC1 41 HF

0.5ms

5.0 V
IC1 4 HFL

0.5ms

5.0 V
IC1 36 TES

50ms

10.0 V
IC1 33 JP+

50ms

10.0 V
IC1 32 JP-

50ms

0.50 V
IC1 14 JP

50ms

1.00 V
IC1 7 TE

CUE

1
2

3

REVIEW

1
2

3

CUE

10

1

11

1

10

1

11

1

20ms

1.00 V
IC1 27 SPO

20ms

2.00 V
IC2 12 CLV+

50ms

1.00 V
IC1 27 SPO

50ms

2.00 V
IC2 12 CLV+

NORMAL DISC

PLAY

TN0=01

PLAY TCD-712 (140mm)

TN0=01

PLAY TCD-712

6

1

7

1

8

1

9

1

6

1

7

1

8

1

9

1

0.5ms

10.0 V
IC1 33 JP+

0.5ms

10.0 V
IC1 32 JP-

0.5ms

0.50 V
IC1 14 JP

0.5ms

1.00 V
IC1 7 TE

50ms

10.0 V
IC1 33 JP+
50ms

10.0 V
IC1 32 JP-

50ms

0.50 V
IC1 14 JP

50ms

1.00 V
IC1 7 TE

REVIEW

– 14 –

12

1

12

1

5s
100mV
IC1 29 SLD

0.5s
100mV
IC1 29 SLD

1

1

CD-C606/1900,CP-C606/1900

+B1

+5V

TO MAIN SECTION

(TO IC401)

2

43
41
36
23

5
6

+7V

XVDD

RVDD

LVDD

VDD

ISET

VVDD

1

40

RCHO

56

4

3

38

36

LVDD

LCHO

39

LVSS

37

IC2

LC78622N

SERVO/SIGNAL

44

XOUT

CONTROL

CNP11

SWITCHING

REGULATOR

Q51

27

24 25

RVSS

CONT4

CONT2

CONT1

CONT3

26

58

53

TO DISPLAY

SECTION

M3

TURNTABLE

UP/DOWN

LOADING

SW2

MECHA UP

SW3

SW1

OPEN/CLOSE

DISC NUMBER

MOTOR

M

–

+

SOLM2

SOLENOID

10

CNS10

CNP10

~

9

GND (D)

10

9

7

8

6

MECHA UP

GND (D)

DISK NO.

OPEN/CLOSE

7

8

6

5

4

GND (D)M–M+

5

4

2

3

1

SOL–

SOL+

2

3

1

Q52

+4.3V

+5V

Q1

LASER DRIVER

XL1

16.93MHz

VOLTAGE

REGULATOR

45

64

62

XIN

VCC1

LD0

EFMO

EFMIN

CLV+

~

10

20

12

9

~

32 40 43 44

JP–

SLC

CV+

IC1

LA9241M

SERVO AMP.

FIN1EF

FIN2

2

3

1

/RES. /CQCK. COIN

JP–

CE

SL1

DAT

CL

DRF

SL+
SL–

SLD

SP

SPO

FD
TO

4

SQOUT. RWC. WRQ

53
52
51

54
31
30

29
23
27

16

15

CL, DAT, SELIAL CONTROL/CE

SL+. SL–. DRF

25
20
17

2

TRACKING/

SPIN/SLED

1

6

M2

SLED

MOTOR

M1

SPINDLE

MOTOR

+B1

+B5

18244020

IC3

M63001FP

FOCUS/

DRIVER

45

15

7

M
M

3839284142 37 36

27

16 26

23
35

~

29
22
21
14

~

8

PICKUP IN

PU-IN SW

SW4

PICKUP UNIT

FOCUS COIL

TRACKING COIL

Figure 15 BLOCK DIAGRAM (1/3)

– 15 –

CD-C606/1900,CP-C606/1900

1

FM

ANTENNA

AM LOOP
ANTENNA

1
2
3

CNP301

1
2
3

BAND PASS

FILTER

BF301

1

L312

AM ANTENNA

T331 T333

FM FRONT END

3 4

IC301

TA7358AP

5

7

FM

OSC

FM RF

AM OSC.

8

FM OSC

T301

Q301

OSC BUFF

6

9

FM IF

T302

FM +B

VT

AM IF

CF301

1

2

FM IF IN

FMOSC

Q351

SWITCHING

3

AM IF

1 3

AM MIX

IC303

LA1805

GND

24

6

AM OSC IN

X352

4.5MHz

20

1

OSC

22

PLL CONTROLLER

7

FM

+B4

T382

23

22

AM+B

AM RF IN

AM IN

16

15

IC302

LC72131

10

FOOL PROOF

FM DET

20

SOLENOID

VR381

1

CF351

2

+B4

3

5

AM IF

T381

21

FM DET

FM+B MO/ST

FM IF DET./FM MPX./AM IF

7

FM IN

STEREO

11

3 4

CE

21

5

VDD

+B7

DODICL

6

REGULATOR

17

FM/AM
SWITCHING

VOLTAGE

SWM3
SWM4

F.A.S

SOLM1

SWM5

CAM

VCO

MONO/ST

15

13

VCO

L

9

10

R

FM/AM

11

Q381

RESET

IC702

3

1

2

+B4

FROM CD SECTION
CNP11

TAPE 1

L-CH

R-CH

PLAYBACK
HEAD

TAPE 2

L-CH

R-CH

RECORD/
PLAYBACK HEAD

ERASE
HEAD

REC

P.B

AC BIAS

CNS401

1
2
3
4

SWITCHING

Q504~Q509

IC501

PLAYBACK AND RECORD

L(T1)
R(T1)

L(T2)

R(T2)

R NF

POP REDUCE

L REC

R REC

AN7345K

/PLAYBACK AMP.

1

L NF

REF

24

2

23

3
4

6
9

16
14
12

T1/T2
REC

NOR/
HIGH

15 19

P.B.

H/N

T1/T2

13

17
10

4

21

5

20

7

18

8

L
R

L R REC

L NF
R NF

ALC

+B4

11

TAPE
TUNER

CD

Q514

PB

Q515

4

L

17

R

3

L
R

18

AUDIO PROCESSOR

L

2

R

19

1

10

IC401

M62439SP

9

20

Q512
Q513

SWITCHING

+B4

R

13

8

L

R

T

Figure 16 BLOCK DIAGRAM (2/3)

– 16 –

MONO/ST

15

/ST

L

10

R

AM

81
ET

02

3

B4

CD-C606/1900,CP-C606/1900

FL701

FL DISPLAY

Q701

M

MM1
TAPE MOTOR

9

Q702

RX701

REMOTE
SENSOR

1

2

3

+B7

KEY
SW701~SW703
SW707~SW722

54
51
50
49

44
42
43

52

47
41
40
39
38
37

36

29

~

14

~

1 2

17

3

5856

31

3021

~

70 777360

72

IC701

IX0282AW

SYSTEM MICROCOMPUTER

252627

57

212223

24

PHM1

+B5

19

30

LED701

18

79

80

~

XL701

4.19MHz

32 33

17353413141516

71

RESET
Q704

Q703

1
2
3
4
5
6

7

1112

10

9

TO CD
SECTION
CNP12

+B5

+B4

10

REGULATOR
3

3

12

CONSTANT

VOLTAGE

IC904
AN78L05

2

D910,D911
D914,D915

D912,D913
D916,D917

Q902

1

11

7

2

2

3

2
5

1

VOLTAGE

REGULATOR
1

CONSTANT

VOLTAGE

REGULATOR
1

IC601
LA4282
POWER AMP.

+B

R

13

8

L

R

REC

T1/T2

Q401
Q402

+12V(MOTOR)

+12V

+B1

+7V CD+B

+B4

+5V

+B5

+B6

+B7

UNSWITCH

+5V

VOLTAGE

REGULATOR

IC903

3

KIA7812P

IC902

3

KIA7806P

IC901

2

AN78L05

L-OUT
R-OUT

Q631
Q632

TRANSFORMER

D921~D924

PT901

POWER

T.F

JK601
HEADPHONES

SO601
SPEAKER
TERMINALS

FRONT
SPEAKER

RL901
RELAY

SO901
AC SOCKET

PT902
POWER TRANSFORMER

AC POWER
SUPPLY CORD

AC 120V 60Hz

Figure 17 BLOCK DIAGRAM (3/3)

– 17 –