Aiwa CXJS-3 Service manual

CX-JS3

SERVICE MANUAL

Ver 1.2 2004.08

CX-JS3 is the amplifier, CD player, tape deck
and tuner section in JAX-S3.

Model Name Using Similar Mechanism CX-JN3

CD
Section

Tape deck
Section

CD Mechanism Type CDM74S-K6BD72
Base Unit Name BU-K6BD72
Optical Block Name KSM-213DCP
Optical Pick-up Name KSS-213D
Model Name Using Similar Mechanism CX-JN3
Tape Tr ansport Mechanism Type CWM43FF13

AEP Model

UK Model

TUNER

FM tuning range 87.5 MHz to 108 MHz
FM usable sensitivity (IHF) 16.8 dBf
FM antenna terminal 75 ohms (unbalanced)
AM tuning range 531 kHz to 1602 kHz
AM usable sensitivity 350 µV/m
AM antenna Loop antenna

AMPLIFIER

Power output Rated: 32 W + 32 W (6 ohms, T.H.D.

1 %, 1 kHz/DIN 45500)
Reference: 40 W + 40 W (6 ohms,
T.H . D. 10 %, 1 kHz/DIN 45324)
MUSIC POWER: 100 W +100 W

Total harmonic distortion 0.08 % (16 W, 1 kHz, 6 ohms, DIN

AUDIO)
Input VIDEO/AUX: 400 mV
Outputs SPEAKER: 6 ohms or more

PHONES: 32 ohms or more

CASSETTE DECK

Track format 4 tracks, 2 channels stereo
Frequency response 50 Hz – 8 kHz
Recording system AC bias
Heads Deck A: playback x 1

Deck B: recording/playback x 1,

erase x 1

SPECIFICATIONS

CD PLAYER

Laser Semiconductor laser (λ = 780 nm)

Emission duration:

continuous
D/A converter 1 bit dual
Signal-to-noise ratio 85 dB (1 kHz, 0 dB)
Harmonic distortion 0.05 % (1 kHz, 0 dB)

GENERAL

Power requirements 230 V AC, 50/60 Hz
Power consumption 65 W
Power consumption With ECO mode on: 0.25 W
in standby mode With ECO mode off: 15 W
Dimensions (W x H x D) 280 x 330 x 392.5 mm
Weight 6.6 kg

Specifications and external appearance are subject to change
without notice.

COPYRIGHT

Check copyright laws relevant to recordings from discs, tuner
or tape for the country where the unit is to be used.

Licensed by BBE Sound, Inc. under USP4638258, 5510752
and 5736897.

9-877-297-03 Sony Corporation

2004H05-1 Personel Audio Company
© 2004.08 Published by Sony Engineering Corporation

COMPACT DISC DECK RECEIVER

CX-JS3

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270 ˚C dur­ing repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra­diation exposure.

This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.

The following caution label is located inside the unit.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 ˚C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges oc­cur such as on IC pins, etc.

• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

2

TABLE OF CONTENTS

CX-JS3

1. SERVICING NOTES ................................................ 4

2. GENERAL

Location of Controls ....................................................... 6

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 8

3-2. Case (SIDE-L/R)............................................................. 9

3-3. Case (Top) ....................................................................... 9

3-4. Tr ay Panel........................................................................ 10

3-5. CD Mechanism Deck (CDM74S-K6BD72)................... 10

3-6. Front Panel Section ......................................................... 11

3-7. Mechanical Deck (CWM43FF13) .................................. 11

3-8. Rear Cabinet Section ...................................................... 12

3-9. PT Board, MAIN Board.................................................. 12

3-10. Table Assy ....................................................................... 13

3-11. Motor (TB) Board ........................................................... 13

3-12. Motor (LD) Board ........................................................... 14

3-13. Base Unit (BU-K6BD72)................................................ 14

3-14. Motor Gear Assy (Sled) (M701), BD Board .................. 15

3-15. Optical Pick-up (KSS-213D) .......................................... 15

4. TEST MODE.............................................................. 16

5. ELECTRICAL ADJUSTMENTS

CD Section ...................................................................... 17

7. EXPLODED VIEWS

7-1. Case Section.................................................................... 43

7-2. Front Panel Section-1...................................................... 44

7-3. Front Panel Section-2...................................................... 45

7-4. Front Panel Section-3...................................................... 46

7-5. Front Panel Section-4...................................................... 47

7-6. Chassis Section ............................................................... 48

7-7. CD Mechanism Deck Section-1

(CDM74S-K6BD72) ....................................................... 49

7-8. CD Mechanism Deck Section-2

(CDM74S-K6BD72) ....................................................... 50

7-9. CD Mechanism Deck Section-3

(CDM74S-K6BD72) ....................................................... 51

7-10. Base Unit Section (BU-K6BD72) .................................. 52

8. ELECTRICAL PARTS LIST ............................... 53

6. DIAGRAMS

6-1. Block Diagram – CD Section – ..................................... 18

6-2. Block Diagram – TUNER/TAPE/PANEL Section – ..... 19

6-3. Block Diagram – AMP/POWER SUPPLY Section – ... 20
6-4. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 21

6-5. Printed W iring Board – BD Section – ........................... 22

6-6. Schematic Diagram – BD Section –.............................. 23

6-7. Printed W iring Boards – CHANGER Section –............ 24

6-8. Schematic Diagram – CHANGER Section –................ 25

6-9. Schematic Diagram – MAIN Section (1/4) –................ 26

6-10. Schematic Diagram – MAIN Section (2/4) – ................ 27

6-11. Schematic Diagram – MAIN Section (3/4) – ................ 28

6-12. Schematic Diagram – MAIN Section (4/4) – ................ 29

6-13. Printed Wiring Board – MAIN Section – ...................... 30

6-14. Printed Wiring Board – HP Section – ........................... 31

6-15. Schematic Diagram – HP Section – .............................. 31

6-16. Printed Wiring Board – PANEL Section – .................... 32

6-17. Schematic Diagram – PANEL Section –....................... 33

6-18. Printed Wiring Boards – KEY Section – ....................... 34

6-19. Schematic Diagram – KEY Section – ........................... 35

6-20. Printed Wiring Board – PT Section – ............................ 36

6-21. Schematic Diagram – PT Section – ............................... 37

6-22. IC Pin Function Description ........................................... 41

3

CX-JS3

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro­static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis­sion, observe from more than 30 cm away from the objectiv e lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.

1

Remove the case (side-L).

2

Turn the loading gear in the direction of arrow A.

A

3

Pull-out the disc tray.

4

SERVICE POSITION
– CD mechanism deck –

CX-JS3

main board (CN691)

– Tape mechanism deck –

Connect wire (flat type) (19 core) to
main board (CN691) and BD board (CN710).

BD board (CN710)

panel board (CN601)

Connect wire (flat type) (13 core) to
panel board (CN601) and mechanical deck.

main board (CN301)

5

CX-JS3

• LOCATION OF CONTROLS

SECTION 2

GENERAL

This section is extracted from
instruction manual.

Main unit: front

Refer to the pages indicated in parentheses for details.

1 DISC CHANGE

Rotates the CD trays.

2 POWER 6STANDBY/ON

Switches the unit on and off (standby).
The red indicator flashes when receiving a signal from
the remote.

3 MODE

Selects various modes (ECO and Repeat/Shuffle/
Programmed playback, etc.) when used in combination
with ENTER and MULTI JOG.

4 ENTER

Fixes the modes and the time (ECO, Repeat/Shuffle/
Programmed playback, clock, and timer , etc.) when used
in combination with ENTER and MULTI JOG.

5 MULTI JOG

When used in combination with ENTER and MULTI JOG,
CD: selects a track and Repeat/Shuffle/Programmed
playback.
Tuner: selects a preset station.
Tape: specifies tape length.
Clock and Timer: sets the time.
i-Bass: selects a frequency range.
Spectrum analyzer, ECO and Dimmer: selects the mode.

6 PHONES jack

Plug in here an optional headphones set with a mini
stereo plug (ø3.5 mm). Speaker output is canceled.

7 SYNC DUB

Starts dubbing a whole tape.

wREC/REC MUTING

Starts recording.

8 DISC DIRECT PLAY 1-3

Selects a disc.

9 zOPEN/CLOSE

Opens or closes the disc compartment.

0 TAPE A/B

Selects Tape function, and deck A or B.

TUNER/BAND

Selects Tuner function and the radio band.

VIDEO/AUX

Selects the function of external equipment connected to
VIDEO/AUX jacks.

CD

Selects CD function.

! Remote sensor

Receives a signal from the remote.

@ VOLUME

Adjusts the volume.

# TREBLE

Enhances high frequency sound.

$ cPLAY/PRESET

When the unit is turned off: activates or deactivates
DEMO.
CD and Tape: starts playback.
Tuner: tunes into a preset station.

sSTOP/CLEAR

CD and Tape: stops playback.
Tuner: clears a station preset.

fTUNING DOWN, gTUNING UP

CD: searches a track in fast forward or fast reverse
playback when held down.
Tape: fast forwards or rewinds the tape.
Tuner: manually tunes down or up within the band.

aPAUSE/SET

CD and Tape: pauses playback.
Tuner: stores the received station in to preset.

% BASS

Emphasizes low frequency sound.

^ i-Bass

Produces rich and clear low frequency sound.

& PTY

Displays a program type for RDS (Radio Data System)

Main unit: rear

Refer to the pages indicated in parentheses for details.

1 AM LOOP, FM 75 Ω terminals

Plug in the supplied AM and FM antennas here.

2 VIDEO/AUX jacks

Accepts analog sound signals from external equipment.
Connect using an optional connecting cable with RCA
phono plugs (red plug to R jack, white plug to L jack).
Refer also to the operating instructions of your equipment.
To switch function to external input, press VIDEO/AUX.

Tip:

To change the displayed name for this function, turn the
unit on, then hold down VIDEO/AUX and press POWER
on the unit. Repeat the procedure to select "VIDEO",
"AUX" or "TV".

3 # SPEAKER terminals

Connect the speaker cord of the supplied front speakers
here.

4 AC power cord

6

CX-JS3

Buttons with the same or similar names with the main unit
basically have the same function.

1 POWER
2 1-0/10, +10

CD: selects a CD track of the specified number.
Tuner: tunes in to the station with the specified preset
number.

The numbered buttons take on these functions below when pressed
with SHIFT held down

:

EDIT

Enters AI Edit Recording or Programmed Edit Recording
mode when pressed in stop mode.

BAND

Selects Tuner function and the radio band.

TAPE A/B

SPECTRUM

Changes the spectrum analyzer display.

TUNER MODE

Switches between stereo or monaural FM reception.

3 r, t

CD: selects a track.
Tuner: selects a preset station.
Tape: specifies tape length.
BASS and TREBLE: adjusts the level.
Clock and Timer: sets the time.

4 PLAYMODE

Selects Shuffle or Programmed playback in CD function.

REPEAT

Enters CD repeat playback mode.

ENTER

5 CLOCK/TIMER/SET

Enters timer setting mode.

CLOCK/TIMER/SELECT

Selects timer playback, timer recording or timer off.

6 DISPLAY
7 SHIFT

Hold down when pressing a numbered button to change
its function to that printed above the number.

e.g.)

"Press SHIFT+BAND on the remote" indicates "Hold
down SHIFT and press '2' (BAND)". Doing so makes you
be able to select Tuner function and the radio band.

8 FUNCTION

Switches the active function among CD, TAPE, TUNER
and VIDEO (AUX or TV).

9 DISC SKIP

Select a disc.

0 c/d

When the unit is turned off: activates or deactivates
DEMO.
CD and Tape: starts playback.

s

CD and Tape: stops playback.

f,g

CD: searches a track in fast forward or fast reverse
playback when held down.
Tape: fast forwards or rewinds the tape.
Tuner: manually tunes down or up within the band.

a

CD and Tape: pauses playback.

! SLEEP

Switches the sleep-timer on/off and selects the duration.

@ VOLUME (+, -)

Adjusts the volume.

# SOUND

Selects BASS or TREBLE setting mode

CLEAR

Clears a track of the CD programmed playback and a
Radio preset station.

Note

The buttons not explained above (ALBUMN, M and
KARAOKE) do not operate for this unit.

Remote control

Refer to the pages indicated in parentheses for details.

Setting the clock

Use the remote.

1

Press CLOCK/TIMER/SET.

Go to step 3 when the time appears and the 'hour' flashes.

2

Press r or t repeatedly until "CLOCK
SET" appears in the display and then press

ENTER.

3

Press r or t repeatedly to set the hour
and then press ENTER.

4

Press r or t repeatedly to set the minute
and then press ENTER.

The time display stops flashing and the clock starts from
00 seconds.

•MULTI JOG is also available in place of r or t.

To display the time

Press DISPLAY on the remote. The time will be displayed for
6 seconds.

If "- -:- -" appears when the unit is turned off

There has been a power interruption. Re-set the clock.

7

CX-JS3

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order.
Note 2: Without completing the process described in , the next process can not be performed.

Set

3-2. CASE

(SIDE-L/R)
(Page 9)

SECTION 3

DISASSEMBLY

3-3. CASE (TOP)

(Page 9)

3-5. CD MECHANISM DECK

(CDM74S-K6BD72)
(Page 10)

3-6. FRONT PANEL

SECTION
(Page 11)

3-7. MECHANICAL

DECK
(CWM43FF13)
(Page 11)

3-4. TRAY PANEL

3-8. REAR CABINET

3-9. PT BOARD,

(Page 10)

SECTION
(Page 12)

MAIN BOARD
(Page 12)

3-10. TABLE ASSY

(Page 13)

3-11. MOTOR (TB)

BOARD
(Page 13)

3-12. MOTOR (LD)

BOARD
(Page 14)

3-13. BASE UNIT

(BU-K6BD72)
(Page 14)

3-14. MOTOR GEAR ASSY (SLED) (M701),

BD BOARD
(Page 15)

3-15. OPTICAL PICK-UP

(KSS-213D)
(Page 15)

8

Note: Follow the disassembly procedure in the numerical order given.

s

w

3-2. CASE (SIDE-L/R)

5

case (side-L)

1

two case screws

3

2

two screws
(BVTP3

×

10)

2

two screws
(BVTP3

×

CX-JS3

10)

1

case screw

3-3. CASE (TOP)

4

case (top)

4

2

claw

3

1

3

4

case screw

1

5

case (side-R)

1

two screws
(BVTP3 × 10)

two case screw

2

claw

2

cla

2

claw

9

CX-JS3

3-4. TRAY PANEL

1

Turn the loading gear
in the direction of arrow

2

Pull-out the disc table.

A

four claws

3

.

A

4

tray panel

3-5. CD MECHANISM DECK (CDM74S-K6BD72)

5

CD mechanism deck (CDM74S-K6BD72)

3

screw
(BVTP3

×

10)

1

wire (flat type) (19 core)
(CN691)

2

connector
(CN701)

4

two screws
(BVTP3

×

10)

10

3

screw
(BVTP3

×

10)

3-6. FRONT PANEL SECTION

3

wire (flat type) (11 core)
(CN694)

2

headphone board

1

CX-JS3

screw
(BVWHTP)

7

front panel section

3-7. MECHANICAL DECK (CWM43FF13)

4

5

three screws
(BVTP3 × 10)

mechanical deck (CWM43FF13)

4

connector
(CN301)

4

connector
(CN302)

3

clamp

2

six screws
(BVTP3

6

connector
(CN101)

×

10)

5

ground mechanical plate

1

wire (flat type) (13 core)

11

CX-JS3

3-8. REAR CABINET SECTION

1

wire (flat type) (15 core) (CN802)

3

rear cabinet section

2

2

three screws
(BVTP3

screw
(BVTP3

×

×

10)

10)

3-9. PT BOARD, MAIN BOARD

3

screw

5

two screws
(ITC4

6

PT board

(BVTP3

×

10)

5

two screws

×

8)

(ITC4

2

screw

×

8)

(BVTT3 × 8)

1

connector (CN091)

4

Remove the PWB PT HLDR
in the direction of the arrow.

8

main board

7

screw
(BVTT3 × 8)

12

7

two screws
(BVTT3 × 8)

3-10. TABLE ASSY

)

d

two claws

5

CX-JS3

A

2

Pull-out the table assy.

6

table assy

3-11. MOTOR (TB) BOARD

1

screw
(PTPWH M2.6)

2

table (loading)

1

Turn the loading gear
in the direction of arrow

3

belt (table)

4

hook

3

wire (flat type) (5 core
(CN702)

A

.

4

connector
(CN731)

6

motor (TB) boar

5

two screws
(BTTP M2.6)

13

CX-JS3

)

3-12. MOTOR (LD) BOARD

4

motor (LD) board

3

two screws
(BTTP M2.6)

1

3-13. BASE UNIT (BU-K6BD72)

belt (loading)

2

connector
(CN704)

14

4

four insulators

2

four stoppers (BU)

3

four coil springs
(insulator)

1

four screws
(BTTP M2.6)

5

base unit
(BU-K6BD72

)

3-14. MOTOR GEAR ASSY (SLED) (M701), BD BOARD

7

gear (A)

6

claw

2

two screws

×

3)

(P2

qa

BD board

1

Remove two
solders.

8

gear (B)

5

wire (flat type) (16 core
(CN708)

0

motor gear assy (SLED)
(M701)

CX-JS3

3-15. OPTICAL PICK-UP (KSS-213D)

4

9

Remove two solders.

3

B

3

screw (P2.6 × 6)

Remove the optical pick-up
(KSS-213D) in the direction
of arrow

B

.

2

sled shaft

A

1

Slide the lever
in the direction of arrow

A

.

15

CX-JS3

SECTION 4

TEST MODE

MC COLD RESET

• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. In the standby status, while pressing the x button, press the

[POWER] button.

2. The set is reset, then becomes standby status.

GC TEST MODE

Procedure:

1. Press the [POWER] button to turn the power on.

2. While pressing the x button, press the [POWER] button for

5 seconds.

3. It change displays in order of model type, version and suffix at

2 seconds interval, then the display is back to normal status.

AMP TEST MODE

Procedure:

1. In the status where AC plug is disconnected, while pressing

the [VIDEO/AUX] button, connect the AC plug to turn the
power on. Then enter the AMP test mode and display “AMP
TEST”.

2. If turn the [VOLUME] knob clockwise, it displays “V OLUME

MAX”, and if turn the knob counterclockwise, it displays
“VOLUME 0”.

3. If the [TREBLE] and [BASS] knobs are turned clockwise or

counterclockwise, it change displays in order of “EQ MAX”,
“EQ MIN” and “EQ FLAT”.

4. To release from this mode, disconnect the AC plug and turn

the power off.

FUNCTION CHANGE MODE

• Select either TV, VIDEO or AUX (MD) of the external function
input.

Procedure:

1. Press the [POWER] button to turn the power on.

2. While pressing the [VIDEO/AUX] button, press the [POWER]

button.

3. Each time this operation is operated, it change displays in or-

der of “TV”, “VIDEO” and “AUX”.

DISC TRAY LOCK

Procedure:

1. Press the

2. While pressing the x button, press the [ OPEN/CLOSE]
button for 5 seconds.

3. The message “LOCKED” is displayed and the tray is locked.
(Even if exiting from this mode, the tray is still locked)

4. To release this lock, while pressing the x button, press the

[ OPEN/CLOSE] button for 5 again.

Z

5. The message “UNLOCKED” is displayed and the tray is un­locked.

CD REPEAT 5 LIMIT CANCEL MODE

• Number of repeat for CD playback is 5 times when the repeat

mode is “REPEAT”. This mode enables CD to repeat playback
for limitless times.

Procedure:

1. Press the [POWER] button to turn the power on.

2. In the repeat on status, while pressing the x button, press the

[POWER] button to turn the power on.

Z

[CD] button to enter the CD repeat 5 limit cancel mode and

repeat mark blinks on the fluorescent indicator tube.

3. To release this mode, press the [POWER] button to turn the
power off.

16

BD board

Oscilloscope

TP(FE)
TP(VC)

symmetry

S-curve waveform

within 3

±

0.5Vp-p

A

B

p

SECTION 5

ELECTRICAL ADJUSTMENTS

CX-JS3

CD TEST MODE

•This mode can run the CD sled motor freely . Use this mode, for
instance, when cleaning the pickup.

Procedure:

1. In the status where AC plug is disconnected, while pressing

the [CD] button, connect the AC plug to turn the power on.

2. When enter this mode, it displays “CD TEST” and few sec-

onds later, all segments turn on of the fluorescent indicator
tube.

3. To release from this mode, disconnect the AC plug and turn

the power off.

In this mode, it operates as following table.

Button Operation Purpose of use

M Move the pick-up to outside track Sled circuit check
m Move the pick-up to inside track Tracking circuit check

Mechanism operation check
Optical pick-up check

N Playback a CD Servo block check

If it cannot focus on, it continuous focus search

x When playback a CD: stop playback APC circuit check

When stop a CD: Laser current measure
display “READING” (blink) Focus search waveform check
continuous laser diode on Tracking balance check
continuous focus search (not made focus on)

X Pause, Tracking servo off

(ignore CLV error)

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.

2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.

S-CURVE CHECK

Procedure :

1. Connect an oscilloscope to TP (FE) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)

4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3 ± 0.5 Vp-p.

Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly

distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

±

level : 1.0

0.3Vp-

Connecting Location: BD board

– BD Board (Conductor side) –

Note: •Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

•Take sweep time as long as possible and light up the
brightness to obtain best waveform.

RF LEVEL CHECK

oscilloscope

BD board

TP(RF)
TP(VC)

Procedure :

1. Connect an oscilloscope to TP (RF) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and playback.

4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.

TP (VC)

TP (RF)

TP (FE)

IC721

1717

CX-JS3

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – CD Section –

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

A

DETECTOR

A

D

C

B

E

F

LASER DIODE

PD

D

C

I-V AMP

B

E

F

LD

LD

PD

AUTOMATIC

POWER CONTROL

Q701

8

7

9

10

80

79

CD DSP

IC721

FIN2

FIN1

TIN1

TIN2

LDD

LDS

RF AMP

APC

TBAL

EQ,

AGC

RF

PH, BH

A/D

CONVERTER

SERVO

PROCESSOR

D/A

CONVERTER

LCHO

EFMIN

4

3

ERROR

CORRECT

D/A

CONVERTER

EXTERNAL

AUDIO IN

SERIAL OUT

CLOCK

GENERATOR

FSX/16MIN

RCHO

ASDFIN
ASDACK
ASLRCK

DATA

DATACK

LRSY

EFLG

C2F

16MOUT

XIN

XOUT

42

45

57
56
55

60
59
58

53
52
50

26MP3RES

54

49

48

16.9344MHz

R-CH

X701

CD

(Page 20)

A

2-AXIS
DEVICE

(FOCUS)

(TRACKING)

M701

(SLED)

M702

(SPINDLE)

O-MUTE,

DO

64

DI

63

WRQ

CL

62

CE

61
65

67DRF
66RES

S701

(LIMIT)

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

IC722

VO3(+)

18
17 VO3(–)

11 VO2(+)
12 VO2(–)

FOIN

20TIN

10

70 LIMIT SW

TDO

FDO23SLDO22SPDO25CONT4

20

21

COMMAND
INTERFACE

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

M

M

26 VO4(+)

27 VO4(–)

2 VO1(+)

1 VO1(–)

25SLIN

3SPIN

7LDS

: CD

99 CD DO
98 CD DI

100 CD CLK

5 CD CE

97 CD WRQ

95 CD DRF

4 CD RESET

M751

(LOADING)

M741

(TABLE)

SYSTEM CONTROLLER

IC901 (1/2)

LOADING MOTOR DRIVE

M

M

1MUTE
94POWER
27HOLD

11RESET
18POWER DOWN

74CD NUMBER SENS

20CD BUSY

IC701

4 OUT1

2 OUT2

TABLE MOTOR DRIVE

IC712

4 OUT1

2 OUT2

MUTE

POWER

HOLD

RESET

P-DOWN

LEVEL SHIFT

Q731

ROTARY

OPEN

CLOSE

ENCODER

S711

+

LM-F

7FIN

LM-R

9RIN

TM-F

7FIN

TM-R

9RIN

O-POWER,

TABLE ADDRESS

SENSOR

IC731

S751

OPEN/CLOSE

DETECT

LM-L, LM-R,

TM-L, TM-R

HOLD

RESET,

P-DOWN

B

C

D

(Page 20)

(Page 20)

(Page 20)

1818

6-2. BLOCK DIAGRAM – TUNER/TAPE/PANEL Section –

FM/AM TUNER PACK

FM 75Ω
(COAXIAL)

AM LOOP

FM ANT

AM ANT

TUNED

STEREO

RDS DATA

RDS INT

FM-SOUT

(AEP, UK)

L-CH

R-CH

MUTE

R-CH

DI
CL
CE

IFC

CLK

PLL-CE

TUNED

STEREO

TU-MUTE

RDS-DATA

RDS-CLK

RDS-SIG

(AEP, UK)

TU

IFC
CLK
PLL-CE
TUNED
STEREO
TU-MUTE

RDS-DATA
RDS-CLK

RDS-SIG

E

(Page 20)

CLK

96 TU DI
88 CLK

9 TU CE
75 TUNED
76 STEREO
85 TU MUTE

2 RDS DO
28 RDS CKL

19 TU-SIG/MIC

SYSTEM CONTROLLER

IC901 (2/2)

LCK

CF1

CF2

XT1

CX-JS3

PB,

PB

REC

BIAS OSC

Q310

CAPSTAN/REEL

MOTOR DRIVE

Q601, 604

(DECK-A)

Q602, 605

(DECK-B)

Q603, 606

REC BIAS

SWITCH

Q311, 312

CAPM+

A-SOL

B-SOL

MUTING

Q305

MUTING

Q307, 309

PB SWITCH

Q301

PB SWITCH

Q303

18

SO

5 LCK

3 DATA
4 CLK

Q601

6

PB2

O-MOTOR

R-CH

O-BIAS

SOL A

SOL B

BIAS OSC

L311

7

8

9

10

PLUNGER DRIVE

PLUNGER DRIVE

L-CH

HP1
(PB)

(DECK-A)

HRPE1

(REC/PB/ERASE)

(DECK-B)

8

X901

32.768kHz

1312XT2

15

16

X902

8.64MHz

R-CH R-CH

L-CH

R-CH R-CH

ERASE

CLK

DATA

LCK

S-OUT

REC

B+

(CD-VM)

CLK,

S-OUT, LCK

TAPE MECHANISM

DECK BLOCK

MM

(CAPSTAN/REEL)

(DECK-A)

(DECK-B)

F

G

(Page 20)

(Page 20)

(Page 20)

SPEANA

H

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: TAPE REC

SPEANA

AMP

Q201, 202

VOLUME

TREBLE

BASS

MULTI JOG

S301 – 323

(FRONT PANEL KEY)

BAND-PASS

FILTER

Q204 – 206

ROTARY

ENCODER

S801

ROTARY

ENCODER

S803

ROTARY

ENCODER

S802

ROTARY

ENCODER

S804

REMOTE CONTROL

RECEIVER

IC801

21 SPEANA-L
22 SPEANA-M
23 SPEANA-H

77 VOL A
78 VOL B

81 TRE A
82 TRE B

83 BASS A
84 BASS B

79 JOG A
80 JOG B

KEY1 –

KEY3

26 – 24

29 RMC

KEYSCAN

A PHOTO/S6
B PHOTO/S7

A HALF/S12
B HALF/S10

A MODE/S13

B MODE/S9

REC FWD/S11

REC REV/S8

S14 – S25

S1 – S5,

S26 – S30

G1 – G11

93POWER LED

92

47
48
54
52
55
50
53
49

56-6730-40

41-45,

68-71,73

S6

S7
S12
S10
S13

S9
S11

S8

LED901

1 STANDBY/ON

LED201

i-BASS

B+ SWITCH

Q607

B+

D620 – 627

S6 – S13

B+

FL901

FLUORESCENT

INDICATOR TUBE

11 V-BASS

MOTOR/PLUNGER DRIVE,

+3.3V

LED DRIVE

IC201

S6
S7
S12
S10
S13
S9
S11
S8

A-PHOTO
B-PHOTO
A-HALF
B-HALF
A-MODE
B-MODE
REC (FWD)
REC (REV)

1919

CX-JS3

6-3. BLOCK DIAGRAM – AMP/POWER SUPPLY Section –

(Page 19)

(Page 18)

(Page 19)

(Page 19)

(Page 18)

SPEANA

H

J602

VIDEO/AUX

A

E

F

D

L

R

CD

TU

PB, REC PB

LM-L, LM-R,
TM-L, TM-R

R-CH

REC

SWITCHING

Q231

BIAS

Q117, 119

R-CH

R-CH

–VP

+VP

FINAL DRIVE

Q121, 123

SWITCHING

Q232

OVER LOAD

R-CH

DETECT

Q129

HOLD
Q282

R-CH

DBFB CONTROL

Q641

17

A-IN

19

B-IN

21

PB-OUT

C-IN

23

PB1P

2

REC1O

28

INPUT SELECT,

ELECTRICAL VOLUME

IC601

7

VOL-IN

LM-L
LM-R
TM-L
TM-R

BASS

OUT

FEED BACK

SWITCH

Q643

BASS BOOST ENHANCER

1

18

INA

BOOST

CONTROL

Q674 – 677

8 – 11 5 – 7

BOOST1 –

BOOST4

LM-L

14

LM-R

15

TM-L

12

TM-R

13

IC671

OUTA6

GIN14VREF7BBE

13

BBE CONTROL,

LOADING/TABLE

MOTOR DRIVE

IC672

6

FREQUENCY

CONTROL

Q671 – 673

FREQ1 –

FREQ3

DATA3CLK

2

CURRENT

MIRROR

Q105, 107

PRE DRIVE

Q101, 103

MUTING

Q181

R-CH

MUTING

CONTROL

Q183

16

BBE

LCK

4

OVER CURRENT

DETECT

Q281

CASCADE
Q109, 111

+VH

R-CH

+VL

+VH

+VL

OUTPUT LEVEL

DETECT

Q233, 234

OUTPUT LEVEL

DETECT

Q235

+

THERMAL DETECT

+

R-CH

TH101, 102

Q291, 292

R-CH

+

J221

PHONES

+

DC DETECT

Q063, 064

AC DETECT

+

+

HOLD

Q045, 046

D067, 068

PROTECT

Q047

+

VH1, 2 (AC)
VH1, 2 (AC)

J203

SPEAKER

+

–

+
–

L

R

(Page 19)

(Page 18)

G

C

CLK,
S-OUT, LCK

RESET,
P-DOWN

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: CD

: TUNER

: TAPE PLAY (DECK-A)

: TAPE REC

: AUX IN

RESET

P-DOWN

RESET SWITCH

Q901

RESET SIGNAL

GENERATOR

IC502

+3.3V

D504

+4V

REGULATOR

IC501

V-STBY

S-OUT

RECT

D091, 092

LCK

CLK

+3.3V (CD)

+4V

POWER TRANSFORMER

(SUB)
PT011

VCC

MUTE

D697

+4V

REGULATOR

IC003

B+ SWITCH

Q023, 024

POWER

FLUORESCENT

INDICATOR TUBE

POWER

VDD

VM

CD-VM

POWER AMP

BLOCK

VF1

VF2

–VFL

D691 – 694

TO

VSS

+6.4V (CD)

TO

REGULATOR

REGULATOR

+VH

–VH

+VL

–VL

–27V

REGULATOR

Q041, 043

+9V

IC002

+9V

IC001

HOLD

RECT

D019 – 022

RECT
D009

RECT

D015 – 018

POWER TRANSFORMER

(MAIN)

PT002

VM1

VM2

VH1

VH2

VL1

VL2

RELAY DRIVE

Q022

RY001

(AC IN)

MUTE, POWER,

HOLD

B

(Page 18)

2020