Sony CXJN-3 Service manual

CX-JN3

TUNER

FM tuning range

87.5 MHz to 108 MHz

FM usable sensitivity (IHF)

13.2 dBf

FM

antenna terminal 75 ohms (unbalanced)

AM

tuning range 530 kHz to 1710 kHz (10 kHz step)

531 kHz to 1710 kHz (9 kHz step)

AM usable sensitivity

350 µV/m

AM antenna

Loop antenna

AMPLIFIER

Power output

40 W + 40 W (40 Hz - 20 kHz, THD
less than 1 %, 6 ohms)

50 W + 50 W (1 kHz, THD less than
10 %, 6 ohms)

Total harmonic distortion

0.08 % (20 W, 1 kHz, 6 ohms)

Input

VIDEO/AUX: 400 mV

Outputs

SPEAKERS: 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

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 120 V AC, 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

(11

1

/8 x 13 x 15 1/2 in.)

Weight 6.7 kg (14 lbs 12 oz)

Specifications and external appearance are subject to change
without notice.

COPYRIGHT

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

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

SERVICE MANUAL

Ver. 1.2 2005.05

CX-JN3 is the amplifier, CD player, tape deck
and tuner section in JAX-N3/PK3.

Model Name Using Similar Mechanism NEW

CD Mechanism Type
CD
Section

Tape deck
Section

Base Unit Name BU-K6BD71A, BU-K6BD72

Optical Block Name KSM-213DCP

Optical Pick-up Name KSS-213D

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism T ype CWM43FF13, CWM43FF25

US Model

AEP Model

UK Model

E Model

CDM74-K6BD71A, CDM74S-K6BD71A,
CDM74S-K6BD72

9-877-248-03 Sony Corporation

2005E05-1 Personal Audio Group
© 2005.05 Published by Sony Engineering Corporation

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

CX-JN3

r

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 CHECK-OUT

After correcting the original service problem, perform the follow­ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica­tion is 0.75 V, so analog meters must have an accurate low­voltage scale. The Simpson 250 and Sanwa SH-63T rd are ex­amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V A C range are suit­able. (See Fig. A)

To Exposed Metal
Parts on Set

AC

1.5 k

0.15 µF

Fig. A. Using an AC voltmeter to check AC leakage.

Ω

Earth Ground

voltmete
(0.75 V)

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.

2

TABLE OF CONTENTS

CX-JN3

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

2. GENERAL

Location of Controls ....................................................... 7

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 9

3-2. Case (SIDE-L/R) ............................................................. 10

3-3. Case (Top) ....................................................................... 10

3-4. Tray Panel........................................................................ 11

3-5. CD Mechanism Deck (CDM74-K6BD71A,

CDM74S-K6BD71A, CDM74S-K6BD72).................... 11

3-6. Fr ont Panel Section ......................................................... 12

3-7. Mechanical Deck (CWM43FF13, CWM43FF25) ......... 12

3-8. Rear Cabinet Section ...................................................... 13

3-9. PT Board, MAIN Board .................................................. 13

3-10. Table Assy ....................................................................... 14

3-11. Motor (TB) Board ........................................................... 14

3-12. Motor (LD) Board ........................................................... 15

3-13. Base Unit (BU-K6BD71A, BU-K6BD72) ..................... 15

3-14. Motor Gear Assy (Sled) (M701), BD Board .................. 16

3-15. Optical Pick-up (KSS-213D) .......................................... 16

4. TEST MODE.............................................................. 17

5. ELECTRICAL ADJUSTMENTS

CD Section ...................................................................... 19

7-2. F ront Panel Section-1...................................................... 50

7-3. F ront Panel Section-2...................................................... 51

7-4. F ront Panel Section-3...................................................... 52

7-5. F ront Panel Section-4...................................................... 53

7-6. Chassis Section ............................................................... 54

7-7. CD Mechanism Deck Section-1 (CDM74-K6BD71A,

CDM74S-K6BD71A, CDM74S-K6BD72).................... 55

7-8. CD Mechanism Deck Section-2 (CDM74-K6BD71A,

CDM74S-K6BD71A, CDM74S-K6BD72).................... 56

7-9. CD Mechanism Deck Section-3 (CDM74-K6BD71A,

CDM74S-K6BD71A, CDM74S-K6BD72).................... 57

7-10. Base Unit Section (BU-K6BD71A, BU-K6BD72) ........ 58

8. ELECTRICAL PARTS LIST ............................... 59

6. DIAGRAMS

6-1. Block Diagram – CD Section – ..................................... 20

6-2. Block Diagram – TUNER/TAPE/PANEL Section –..... 21

6-3. Block Diagram – AMP/POWER SUPPLY Section – ... 22
6-4. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 23

6-5. Printed Wiring Board – BD Section –

(EXCEPT US model)...................................................... 24

6-6. Schematic Diagram – BD Section –

(EXCEPT US model)...................................................... 25

6-7. Printed Wiring Board – BD Section – (US model) ....... 26

6-8. Schematic Diagram – BD Section – (US model) .......... 27

6-9. Printed Wiring Boards – CHANGER Section –............ 28

6-10. Schematic Diagram – CHANGER Section – ................ 29

6-11. Schematic Diagram – MAIN Section (1/4) – ................ 30

6-12. Schematic Diagram – MAIN Section (2/4) – ................ 31

6-13. Schematic Diagram – MAIN Section (3/4) – ................ 32

6-14. Schematic Diagram – MAIN Section (4/4) – ................ 33

6-15. Printed Wiring Board – MAIN Section – ...................... 34

6-16. Printed Wiring Board – HP Section – ........................... 35

6-17. Schematic Diagram – HP Section – .............................. 35

6-18. Printed Wiring Board – PANEL Section – .................... 36

6-19. Schema tic Diagram – PANEL Section –....................... 37

6-20. Printed Wiring Boards – KEY Section – ....................... 38

6-21. Schematic Diagram – KEY Section – ........................... 39

6-22. Printed Wiring Board – PT Section –

(EXCEPT Chilean and Peruvian models) ...................... 40

6-23. Schematic Diagram – PT Section –

(EXCEPT Chilean and Peruvian models) ...................... 41

6-24. Printed Wiring Board – PT Section –

(Chilean and Peruvian models)....................................... 42

6-25. Schematic Diagram – PT Section –

(Chilean and Peruvian models)....................................... 43

6-26. IC Pin Function Description ........................................... 47

7. EXPLODED VIEWS

7-1. Case Section .................................................................... 49

3

CX-JN3

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.

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)

• MODEL IDENTIFICATION
– Back Panel –

PART No.

MODEL PART No.

US model 4-245-162-0
Chilean and Peruvian models 4-245-162-2
AEP, UK and CIS models 4-245-162-3
Mexican model (MADE IN Mexico) 4-245-162-7
Mexican model (MADE IN China) 4-245-162-8

[]

[]

[]

[]

[]

: 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.

4

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

CX-JN3

3

Pull-out the disc tray.

5

CX-JN3

SERVICE POSITION
– CD mechanism deck –

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)

6

• LOCATION OF CONTROLS

SECTION 2

GENERAL

CX-JN3

This section is extracted from
instruction manual.

Main unit: front

1 DISC CHANGE

Rotates the CD trays.

2 POWER 6 STANDBY/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/
Programed playback, etc.) when used in combination with
ENTER and MULTI JOG.

4 ENTER

Fixes the modes and the time (ECO, Repeat/Shuffle/
Programed 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/Programed
playback.
Tuner: selects a preset station.
Tape: specifies tape length.
Clock and T imer: 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.

w REC/REC MUTING

Starts

recording.

8 DISC DIRECT PLAY 1-3

Selects a disc.

9zOPEN/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.

$ BASS

Emphasizes low frequency sound.

% i-Bass

Produces rich and clear low 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.

s STOP/CLEAR

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

f TUNING DOWN, g TUNING UP

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

a PAUSE/SET

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

Main unit: rear

1 AM LOOP,

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

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

FM 75 Ω terminals

VIDEO/AUX.

7

CX-JN3

Remote control

Buttons with

the main unit

1 POWER
2 1-0/10, +10

below

the same or similar names with

basically have the same function.

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

when

EDIT

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

BAND

Selects Tuner function and the radio band.

together with SHIFT held down

pressed

TAPE A/B
SPECTRUM

Changes the spectrum analyzer display.

TUNER MODE

Switches between stereo or monaural FM reception.

3r , t

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

4 PLAY MODE

Selects Shuffle or Programed 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.

DISPLAY

6

Displays the time and the remaining time for CD.

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, T APE, TUNER
and VIDEO (AUX or TV).

9 DISC SKIP

Select a disc.

0c/d

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

s

CD and Tape: stops playback.

f ,g

CD: searches a track in fast for ward 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 programed playback and a Radio
preset station.

Note

The buttons not explained above (ALBUM N, M and
KARAOKE

) do not operate for this unit.

Setting

Use the remote.

1

2

3

4

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

To di splay the time

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

Tip:

"AM 12:00" indicates midnight and " PM 12:00" noon.

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

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

the

clock

Press CLOCK/TIMER/SET.

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

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

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

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.

CLOCK

8

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

Set

3-2. CASE

(SIDE-L/R)
(Page 10)

3-3. CASE (TOP)

(Page 10)

3-4. TRAY PANEL

(Page 11)

3-6. FRONT PANEL

SECTION
(Page 12)

3-8. REAR CABINET

SECTION
(Page 13)

3-7. MECHANICAL

DECK
(CWM43FF13,
CWM43FF25)
(Page 12)

3-9. PT BOARD,

MAIN BOARD
(Page 13)

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

BD BOARD
(Page 16)

3-15. OPTICAL PICK-UP

(KSS-213D)
(Page 16)

3-13. BASE UNIT

(BU-K6BD71A, BU-K6BD72)
(Page 15)

3-10. TABLE ASSY

(Page 14)

3-11. MOTOR (TB)

BOARD
(Page 14)

3-12. MOTOR (LD)

BOARD
(Page 15)

3-5. CD MECHANISM DECK

(CDM74-K6BD71A, CDM74S-K6BD71A, CDM74S-K6BD72)
(Page 11)

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.

3-1. DISASSEMBLY FLOW

CX-JN3

SECTION 3

DISASSEMBLY

9

CX-JN3

s

w

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

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

5

case (side-L)

1

two case screws

3

2

two screws
(BVTP3

×

10)

2

two screws
(BVTP3

×

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

10

2

claw

2

cla

2

claw

3-4. TRAY PANEL

)

1

Turn the loading gear
in the direction of arrow

2

Pull-out the disc table.

4

tray panel

A

3

four claws

CX-JN3

.

A

3-5. CD MECHANISM DECK (CDM74-K6BD71A, CDM74S-K6BD71A, CDM74S-K6BD72)

5

CD mechanism deck
(CDM74-K6BD71A,
CDM74S-K6BD71A,
CDM74S-K6BD72)

1

wire (flat type) (19 core
(CN691)

2

connector

3

screw
(BVTP3 × 10)

(CN701)

4

two screws
(BVTP3 × 10)

3

screw
(BVTP3 × 10)

11

CX-JN3

3-6. FRONT PANEL SECTION

3

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

2

headphone board

1

screw
(BVWHTP)

4

connector
(CN301)

6

front panel section

5

three screws
(BVTP3

×

3-7. MECHANICAL DECK (CWM43FF13, CWM43FF25)

4

mechanical deck
(CWM43FF13,
CWM43FF25)

4

10)

connector
(CN302)

3

clamp

2

six screws
(BVTP3

×

10)

12

5

ground mechanical plate

1

wire (flat type) (13 core)

3-8. REAR CABINET SECTION

)

1

wire (flat type)
(CN801) (11 core: EXCEPT AEP, UK)
(CN802) (15 core: AEP, UK)

3

rear cabinet section

2

2

three screws
(BVTP3

screw
(BVTP3

×

CX-JN3

×

10

10)

3-9. PT BOARD, MAIN BOARD

•

Abbreviation
E51 : Chilean and Peruvian models

(EXCEPT E51)

6

8

two screws
(ITC4

9

PT board

screw
(BVTP3

7

×

×

8)

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

10)

8

two screws
(ITC4

A

4

5

×

8)

screw
(BVTT3

clamp

7

(E51)

5

screw
(BVTP3

×

10)

×

8)

8

PT board

A

3

connector
(CN090) (E51)
(CN091) (EXCEPT E51)

two screws

×

8)

(ITC4

1

screw (BVTT3 × 8)

7

two screws

×

8)

(ITC4

A

6

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

4

screw
(BVTT3

×

8)

1

two screws
(BVTT3

2

×

8)

main board

13

CX-JN3

)

d

Ver. 1.2

3-10. TABLE ASSY

two claws

5

A

2

Pull-out the table assy.

6

table assy

3-11. MOTOR (TB) BOARD

1

screw
(PTPWH M2.6)

2

tray

1

Turn the loading gear
in the direction of arrow

3

belt (table)

4

hook

3

wire (flat type) (5 core
(CN702)

A

.

14

4

connector
(CN731)

6

5

two screws
(BTTP M2.6)

motor (TB) boar

3-12. MOTOR (LD) BOARD

)

4

motor (LD) board

3

two screws
(BTTP M2.6)

CX-JN3

1

belt (loading)

3-13. BASE UNIT (BU-K6BD71A, BU-K6BD72)

2

connector
(CN704)

6

two insulators

5

two coil springs
(insulator)

4

two stoppers (BU)

3

two screws
(BTTP M2.6)

7

base unit
(BU-K6BD71A, BU-K6BD72

6

two insulators

2

two coil springs
(insulator)

1

two screws
(PTPWH M2.6)

15

CX-JN3

)

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)

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

.

16

2

sled shaft

A

1

Slide the lever
in the direction of arrow

A

.

SECTION 4

TEST MODE

CX-JN3

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.

CHANGE-OVER OF AM TUNER STEP BETWEEN
9 kHz AND 10 kHz
(Except AEP, UK and CIS models)

•A step of AM channels can be changed over between 9 kHz and
10 kHz.

Procedure:

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

2. While pressing the [TUNER] button, press the [POWER] but-

ton to the display on fluorescent indicator tube changes to “AM
530 kHz” (10 kHz step) or “AM 531 kHz” (9 kHz step), and
thus the channel step is changed over.

FUNCTION CHANGE MODE

• Select either TV, VIDEO or A UX (MD) of the e xternal 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.

17

CX-JN3

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)

18

p

p

SECTION 5

ELECTRICAL ADJUSTMENTS

CX-JN3

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

Oscilloscope

BD board

TP(FE)
TP(VC)

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 : 1.3

0.3Vp-

Connecting Location: BD board

– BD Board (Conductor side) – (EXCEPT US model)

– BD Board (Conductor side) – (US model)

TP (VC)

TP (RF)

TP (FE)

IC721

S-curve waveform

symmetry

A

±

within 3

B

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.

0.5Vp-

RF LEVEL CHECK

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.

oscilloscope

TP (RF)

IC721

TP (VC)
TP (FE)

1919

CX-JN3

6-1. BLOCK DIAGRAM – CD Section –

SECTION 6

DIAGRAMS

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

DETECTOR

A

D

C

B

E

F

LASER DIODE

LD

PD

A

D

C

I-V AMP

B

E

F

LD

PD

AUTOMATIC

POWER CONTROL

Q701

CD DSP

IC721

(EXCEPT US)

(US)

FIN2

8

FIN1

7

TIN1

9

TIN2

10

LDD

80

LDS

79

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

X701

R-CH

(EXCEPT US)

79 DATAIN
80 DATACK

78 RESB

73 CMDOUT
74 CMDIN
75 CL

2 ADDATA
3 ADBCK
4 ADLRCK

1 LRSY

5 C2FIN
9 CKOUT

7 CKIN

MP3 DECODER

IC801

CE

FSYNC

76 66

MDATA0

– MDATA15

MADRS0

– MADRS8

23-30, 33-4060-53, 50

MEMORY

2-5, 7-10,

35-38, 40-43

A0 – A8

18-21, 24-28

29 OE45OEB
15 WE42WEB
16 RAS41RASB
31 LCAS43CASLB
30 UCAS44CASUB

IC802

I/O1 – I/O16

CD

(Page 22)

A

2-AXIS

DEVICE

(FOCUS)

(TRACKING)

M701

(SLED)

M702

(SPINDLE)

106

DO

64

DI

63

WRQ

CL

62

CE

61
65

67DRF
66RES

S701

(LIMIT)

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

IC722

(EXCEPT US)

(US)

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)

MP3 CE

SYSTEM CONTROLLER

IC901 (1/2)

LOADING MOTOR DRIVE

M

M

MP3 SYNC

IC701

4 OUT1

2 OUT2

TABLE MOTOR DRIVE

IC712

4 OUT1

2 OUT2

1MUTE
94POWER
27HOLD

11RESET
18POWER DOWN

74CD NUMBER SENS

20CD BUSY

7FIN

9RIN

7FIN

9RIN

MUTE

POWER

HOLD

RESET

P-DOWN

LEVEL SHIFT

Q731

+

LM-F

LM-R

TM-F

TM-R

OPEN

CLOSE

ROTARY

ENCODER

S711

TABLE ADDRESS

O-POWER,

SENSOR

IC731

S751

OPEN/CLOSE

DETECT

LM-L, LM-R,

TM-L, TM-R

O-MUTE,

HOLD

RESET,

P-DOWN

B

C

D

(Page 22)

(Page 22)

(Page 22)

2020

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

FM/AM TUNER PACK

(Page 22)

FM 75Ω
(COAXIAL)

AM LOOP

MIC, 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

FM ANT

AM ANT

TUNED

STEREO

RDS DATA

RDS INT

FM-SOUT

(AEP, UK)

L-CH

R-CH

DO

MUTE

R-CH

DI
CL
CE

TU-MUTE

RDS-DATA

RDS-CLK
RDS-SIG

DATA

CLK
PLL-CE
TUNED

STEREO

MIC

SPEANA

CX-JN3

PB,
REC

B+

(CD-VM)

DATA, CLK,
S-OUT, LCK

TAPE MECHANISM

DECK BLOCK

MM

(CAPSTAN/REEL)

(DECK-A)

(DECK-B)

F

G

(Page 22)

(Page 22)

REC

Q310

MOTOR DRIVE

Q601, 604

(DECK-A)
Q602, 605

(DECK-B)
Q603, 606

PB

REC BIAS

SWITCH

Q311, 312

S6
S7
S12
S10
S13
S9
S11
S8

CAPM+

A-SOL

B-SOL

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

MUTING

Q305

MUTING

Q307, 309

PB SWITCH

Q301

PB SWITCH

Q303

18

SO

5 LCK

3 DATA
4 CLK

11 V-BASS

MOTOR/PLUNGER DRIVE,

+3.3V

Q601

6

PB2

O-MOTOR

LED DRIVE

IC201

R-CH

O-BIAS

SOL A

SOL B

BIAS OSC

L311

7

8

9

10

BIAS OSC

CAPSTAN/REEL

PLUNGER DRIVE

PLUNGER DRIVE

L-CH

HP1
(PB)

(DECK-A)

TU

(Page 22)

E

HRPE1

(REC/PB/ERASE)

(DECK-B)

IFC

CLK

(AEP, UK)

AMP

Q201, 202

VOLUME

TREBLE

BASS

MULTI JOG

S301 – 323

(FRONT PANEL KEY)

DATA
IFC
CLK
PLL-CE
TUNED
STEREO
TU-MUTE

RDS-DATA
RDS-CLK

RDS-SIG

BAND-PASS

FILTER

Q204 – 206

ROTARY

ENCODER

S801

ROTARY

ENCODER

S803

ROTARY

ENCODER

S802

ROTARY

ENCODER

S804

REMOTE CONTROL

RECEIVER

IC801

DATA

96 TU DI
88 CLK

75 TUNED
76 STEREO
85 TU MUTE

28 RDS CKL

19 TU-SIG/MIC

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

29 RMC

SYSTEM CONTROLLER

3 TU/EVOL DO

9 TU CE

2 RDS DO

(EXCEPT US, CIS)

KEY1 –

KEY3

26 – 24

IC901 (2/2)

LCK

XT1

CF1

CF2

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

8

1312XT2

15

16

93POWER LED

92

47
48
54
52
55
50
53
49

56-6730-40

41-45,

68-71,73

X901

32.768kHz

X902

8.64MHz

S6

S7
S12
S10
S13

S9
S11

S8

R-CH R-CH

L-CH

R-CH R-CH

ERASE

LED901

1 STANDBY/ON

B+

CLK

DATA

D620 – 627

S6 – S13

LCK

S-OUT

LED201

i-BASS

B+ SWITCH

B+

FL901

FLUORESCENT

INDICATOR TUBE

Q607

2121

CX-JN3

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

(Page 20)

(Page 21)

(Page 21)

(Page20)

J401

MIC

J602

VIDEO/AUX

D

L

R

CD

A

TU

E

PB, REC PB

F

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

MIC LEVEL

AGC

Q401

MIC AMP

IC401 (1/2)

R-CH

VR401

MIC LEVEL

REC

(Chilean, Peruvian, Mexican)

MIC AMP

IC401 (2/2)

A-IN

19

B-IN

21

C-IN

23

PB1P

2

REC1O

28

D402

PB-OUT

CONT

13

MIC

SPEANA

+

ELECTRICAL VOLUME

DBFB CONTROL

7

INPUT SELECT,

IC601

VOL-IN

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

MIC, SPEANA

R-CH

Q641

17

BASS

OUT

(Page 21)

H

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

SWITCHING

Q231

R-CH

SWITCHING

Q232

R-CH

CURRENT

MIRROR

Q105, 107

–VP

+VP

PRE DRIVE

Q101, 103

MUTING

Q181

R-CH

MUTING

CONTROL

Q183

16

BBE

LCK

4

OVER CURRENT

DETECT

Q281

CASCADE
Q109, 111

BIAS

Q117, 119

FINAL DRIVE

Q121, 123

R-CH

OVER LOAD

DETECT

Q129

HOLD
Q282

+VH

+VL

+VH

+VL

R-CH

OUTPUT LEVEL

DETECT

Q233, 234

OUTPUT LEVEL

DETECT

Q235

+

THERMAL DETECT

+

TH101, 102

Q291, 292

R-CH

+

J221

PHONES

R-CH

+

DC DETECT

Q063, 064

AC DETECT

+

+

HOLD

Q045, 046

D067, 068

PROTECT

Q047

+

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

J203

SPEAKER

+
–

+
–

L

R

(Page 21)

(Page 20)

G

C

DATA, 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

: MIC

RESET

P-DOWN

RESET SWITCH

Q901

DATA

RESET SIGNAL

GENERATOR

IC502

+3.3V

D504

+4V

REGULATOR

IC501

V-STBY

(EXCEPT US)

+1.8V (MP3)

LCK

CLK

S-OUT

+1.8V

REGULATOR

IC803

+3.3V (CD)

+4V

POWER TRANSFORMER

PT002 (Chilean, Peruvian)

PT011 (EXCEPT Chilean, Peruvian)

RECT

D091, 092

VCC

(SUB)

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

–30V

REGULATOR

Q041, 043

+9V

IC002

+9V

IC001

D010 (Chilean, Peruvian, Mexican)
D015 – 018 (US, AEP, UK, CIS)

HOLD

POWER TRANSFORMER

PT001 (Chilean, Peruvian)

PT002 (EXCEPT Chilean, Peruvian)

RECT

D019 – 022

RECT
D009

RECT

VM1

VM2

VH1

VH2

VL1

VL2

RELAY DRIVE

Q022

(MAIN)

RY001

(Chilean, Peruvian)

S001

VOLTAGE SELECTOR

110 – 120V

220 – 240V

EXCEPT

Chilean, Peruvian

MUTE, POWER,

HOLD

(AC IN)

B

(Page 20)

2222

CX-JN3

CD KEY board

SENSOR board

BD board

MOTOR (TB) board

DRIVER board

MOTOR (LD) board

SW board

KEY board

PT board

HEADPHONE board

PANEL board

MAIN board

TUNER PACK

6-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)

Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.

• Indication of transistor.

C
Q

B

E

B

These are omitted.

Q

CE

These are omitted.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/
specified.

f

•

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

Note: The components identified b y mark 0 or dotted line

• A : B+ Line.

• B : B– Line.

•Voltages and waveforms are dc with respect to ground

•Voltages are taken with a V OM (Input impedance 10 MΩ).

•Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

•Abbreviation

: internal component.

with mark 0 are critical for safety.
Replace only with part number specified.

under no-signal conditions.
– BD Section –
no mark : CD PLAY
– Other Sections –
no mark : FM

Voltage variations may be noted due to normal produc­tion tolerances.

Voltage variations may be noted due to normal produc­tion tolerances.

F : TUNER (FM/AM)
E : TAPE PLAY (DECK A)
d : TAPE PLAY (DECK B)
G : REC
J : CD PLAY
L : AUX IN
N : MIC INPUT

E51 : Chilean and Peluvian models
MX : Mexican model

: Impossible to measure

∗

4

• Circuit Boards Location

W or less unless otherwise

2323