Aiwa CX-JN3 User manual

SERVICE MANUAL
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM74-K6BD71A, CDM74S-K6BD71A,
CDM74S-K6BD72
CD Base Unit Name BU-K6BD71A, BU-K6BD72
Section Optical Block Name KSM-213DCP
Optical Pick-up Name KSS-213D
Tape deck Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CWM43FF13, CWM43FF25
COMPACT DISC DECK RECEIVER
US Model
AEP Model
UK Model
E Model
CX-JN3
Ver. 1.2 2005.05
9-877-248-03 Sony Corporation
2005E05-1 Personal Audio Group
© 2005.05 Published by Sony Engineering Corporation
SPECIFICATIONS
CX-JN3 is the amplifier, CD player, tape deck
and tuner section in JAX-N3/PK3.
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)
AMusable sensitivity 350 µV/m
AMantenna 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.

CX-JN3
2
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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 ra-
diation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 PUB-
LISHED BY SONY.
The following caution label is located inside the unit.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operatedAC 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2VAC range are suit-
able. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground

CX-JN3
3
TABLE OF CONTENTS
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. Front 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
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. Schematic 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
7-2. Front Panel Section-1...................................................... 50
7-3. Front Panel Section-2...................................................... 51
7-4. Front Panel Section-3...................................................... 52
7-5. Front 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

4
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 electro-
static 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 emis-
sion, observe from more than 30 cm away from the objective 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.
•MODEL IDENTIFICATION
– Back Panel –
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[]
PART No.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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 oc-
cur 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.

5
CX-JN3
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
3 Pull-out the disc tray.
1 Remove the case (side-L).
2 Turn the loading gear in the direction of arrow A .
A

6
CX-JN3
SERVICE POSITION
– CD mechanism deck –
–Tape mechanism deck –
main board (CN691)
Connect wire (flat type) (19 core) to
main board (CN691) and BD board (CN710).
BD board (CN710)
Connect wire (flat type) (13 core) to
panel board (CN601) and mechanical deck.
panel board (CN601)
main board (CN301)

7
CX-JN3
SECTION 2
GENERAL This section is extracted from
instruction manual.
•LOCATION OF CONTROLS
1DISC CHANGE
Rotates the CD trays.
2POWER 6STANDBY/ON
Switches the unit on and off (standby).
The red indicator flashes when receiving a signal from
the remote.
3MODE
Selects various modes (ECO and Repeat/Shuffle/
Programed playback, etc.) when used in combination with
ENTER and MULTI JOG.
4ENTER
Fixes the modes and the time (ECO, Repeat/Shuffle/
Programed playback, clock, and timer, etc.) when used
in combination with ENTER and MULTI JOG.
!Remotesensor
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 ordeactivates
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 foward 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 andTape: pauses playback.
Tuner: stores the received station in to preset.
Main unit: front
5MULTI JOG
When used incombination 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 Timer: sets the time.
i-Bass:selects a frequency range.
Spectrum analyzer,ECO and Dimmer: selects the mode.
6PHONES jack
Plug in here an optional headphones set with a mini
stereo plug (ø3.5 mm). Speaker output is canceled.
7SYNC DUB
Starts dubbing a whole tape.
wREC/REC MUTING
Starts recording.
8DISC DIRECT PLAY 1-3
Selects a disc.
9zOPEN/CLOSE
Opens or closes the disc compartment.
0TAPEA/B
SelectsTape function, and deck A or B.
TUNER/BAND
SelectsTuner function and the radio band.
VIDEO/AUX
Selects the function of external equipment connected to
VIDEO/AUX jacks.
CD
Selects CD function.
Main unit: rear
1AM LOOP, FM 75 Ωterminals
Plug in the supplied AM and FM antennas here.
2VIDEO/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, turnthe
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.
4AC power cord

8
CX-JN3
Setting the clock
Use the remote.
1 Press CLOCK/TIMER/SET.
Go to step3 when the time appears and the 'hour' flashes.
2 Press ror trepeatedly until " CLOCK
SET" appears in the display and then press
ENTER.
3 Press ror trepeatedly to set the hour
and then press ENTER.
4 Press ror trepeatedly 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 ror t.
To d i 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.
Buttons with the same or similar names with
the main unit basically have the same function.
1POWER
21-0/10, +10
CD: selects a CD track of the specified number.
Tuner:tunesin to the station with the specified preset
number .
The numbered buttons take on these functions
below when pressed together with SHIFT held down
:
EDIT
Enters AI Edit Recording or Programed Edit Recording
mode when pressed in stop mode.
BAND
SelectsTuner function and the radio band.
TAPEA/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 Timer: sets the time.
4PLAY MODE
Selects Shuffle or Programed playback in CD function.
REPEAT
Enters CD repeat playback mode.
ENTER
5CLOCK/TIMER/SET
Enters timer setting mode.
CLOCK/TIMER/SELECT
Selects timerplayback, timerrecording or timer off.
6DISPLAY
Displays the time and the remaining time for CD.
7SHIFT
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.
8FUNCTION
Switches the active function among CD, TAPE, TUNER
and VIDEO (AUX or TV).
9DISC SKIP
Select a disc.
0c/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 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 andselects the duration.
@VOLUME (+, -)
Adjusts the volume.
#SOUND
Selects BASS or TREBLE setting mode.
CLEAR
Clears a track of theCD programed playback and a Radio
preset station.
Note
The buttons not explained above (ALBUM N, Mand
KARAOKE ) do not operate for this unit.
Remote control

CX-JN3
9
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
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.

CX-JN3
10
3-3. CASE (TOP)
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L/R)
1 case screw
1 case screw
3
3
4
4
5 case (side-L)
5 case (side-R)
2 two screws
(BVTP3
× 10)
2 two screws
(BVTP3
× 10)
1 two case screw
s
1 two case screws
3
4
case (top)
2 claw
2 cla
w
1 two screws
(BVTP3 × 10)
2 claw
2 claw

CX-JN3
11
3-4. TRAY PANEL
3-5. CD MECHANISM DECK (CDM74-K6BD71A, CDM74S-K6BD71A, CDM74S-K6BD72)
5 CD mechanism deck
(CDM74-K6BD71A,
CDM74S-K6BD71A,
CDM74S-K6BD72)
3 screw
(BVTP3 × 10)
4 two screws
(BVTP3 × 10)
3 screw
(BVTP3 × 10)
1 wire (flat type) (19 core
)
(CN691)
2 connector
(CN701)
4 tray panel
2 Pull-out the disc table.
1 Turn the loading gear
in the direction of arrow
A .
A
3
four claws

CX-JN3
12
3-6. FRONT PANEL SECTION
3-7. MECHANICAL DECK (CWM43FF13, CWM43FF25)
1 screw
(BVWHTP)
2 headphone board
6 front panel section
5 three screws
(BVTP3
× 10)
3 wire (flat type) (11 core)
(CN694)
4 connector
(CN301)
4 connector
(CN302)
5 ground mechanical plate
2 six screws
(BVTP3
× 10)
1 wire (flat type) (13 core)
4 mechanical deck
(CWM43FF13,
CWM43FF25)
3 clamp

CX-JN3
13
3-8. REAR CABINET SECTION
3-9. PT BOARD, MAIN BOARD
3 rear cabinet section
2 three screws
(BVTP3
× 10
)
2 screw
(BVTP3
× 10)
1 wire (flat type)
(CN801) (11 core: EXCEPT AEP, UK)
(CN802) (15 core: AEP, UK)
8 PT board
2 main board
6 Remove the PWB PT HLDR
in the direction of the arrow.
4 screw
(BVTT3
× 8)
5 clamp
1 screw (BVTT3 × 8)
5 screw
(BVTP3
× 10)
7 two screws
(ITC4
× 8)
7 two screws
(ITC4
× 8)
1 two screws
(BVTT3
× 8)
3 connector
(CN090) (E51)
(CN091) (EXCEPT E51)
(E51)
(EXCEPT E51)
A
A
A
9 PT board
7 Remove the PWB PT HLDR
in the direction of the arrow.
4 screw
(BVTT3
× 8)
6 screw
(BVTP3
× 10)
8 two screws
(ITC4
× 8)
8 two screws
(ITC4
× 8)
• Abbreviation
E51 : Chilean and Peruvian models

CX-JN3
14
3-10. TABLE ASSY
3 wire (flat type) (5 core
)
(CN702)
4 hook
1 Turn the loading gear
in the direction of arrow
A .
A
5
two claws
2 Pull-out the table assy.
6 table assy
3-11. MOTOR (TB) BOARD
2 tray
4 connector
(CN731)
1 screw
(PTPWH M2.6)
5 two screws
(BTTP M2.6)
6 motor (TB) boar
d
3 belt (table)
Ver. 1.2

CX-JN3
15
3-12. MOTOR (LD) BOARD
3-13. BASE UNIT (BU-K6BD71A, BU-K6BD72)
2 connector
(CN704)
3 two screws
(BTTP M2.6)
4 motor (LD) board
1 belt (loading)
1 two screws
(PTPWH M2.6)
2 two coil springs
(insulator)
5 two coil springs
(insulator)
6 two insulators
7 base unit
(BU-K6BD71A, BU-K6BD72
)
6 two insulators
3 two screws
(BTTP M2.6)
4 two stoppers (BU)

CX-JN3
16
1 Remove two
solders.
qa BD board
2 two screws
(P2
× 3)
6 claw
7 gear (A)
8 gear (B)
5 wire (flat type) (16 core
)
(CN708)
0 motor gear assy (SLED)
(M701)
3 screw (P2.6 × 6)
9 Remove two solders.
4
2 sled shaft
1 Slide the lever
in the direction of arrow
A .
3 Remove the optical pick-up
(KSS-213D) in the direction
of arrow
B .
A
B
3-14. MOTOR GEAR ASSY (SLED) (M701), BD BOARD
3-15. OPTICAL PICK-UP (KSS-213D)

17
CX-JN3
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 xbutton, 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 xbutton, 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 “VOLUME
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.
DISC TRAY LOCK
Procedure:
1. Press the [POWER] button to turn the power on.
2. While pressing the xbutton, 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 xbutton, press the
[ OPEN/CLOSE] button for 5 again.
5. The message “UNLOCKED” is displayed and the tray is un-
locked.
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 xbutton, press the
[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.
Z
Z
CHANGE-OVER OF AM TUNER STEP BETWEEN
9 kHz AND 10 kHz
(Except AEP, UK and CIS models)
•Astep ofAM 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 orAUX (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”.

18
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 theAC 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
MMove the pick-up to outside track Sled circuit check
mMove the pick-up to inside track Tracking circuit check
Mechanism operation check
Optical pick-up check
NPlayback a CD Servo block check
If it cannot focus on, it continuous focus search
xWhen 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)
XPause, Tracking servo off
(ignore CLV error)

CX-JN3
1919
CD SECTION
Note:
1. CDBlock is basicallydesigned to operatewithoutadjustment.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 10MΩimpedance.
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 betweenA and B. And confirm peak to peak level
within 3 ±0.5 Vp-p.
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
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.
BD board Oscilloscope
TP(FE)
TP(VC)
symmetry
S-curve waveform
within 3
± 0.5Vp-
p
A
B
TP(RF)
BD board oscilloscope
TP(VC)
Note: Clear RF signal waveform means that the shape “ ◊” can be clearly
distinguished at the center of the waveform.
Connecting Location: BD board
RF signal waveform VOLT/DIV : 200mV
TIME/DIV : 500ns
level :1.3
± 0.3Vp-
p
TP (VC)
TP (RF)
TP (FE)
IC721
– BD Board (Conductor side) – (EXCEPT US model)
SECTION 5
ELECTRICAL ADJUSTMENTS
TP (VC) TP (RF)
TP (FE)
IC721
– BD Board (Conductor side) – (US model)

CX-JN3
2020
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD Section –
8
7
9
10
80
79
70 LIMIT SW
20
TDO
18
10
VO3(+)
FOIN
20TIN
3SPIN
7LDS
25SLIN
17 VO3(–)
11 VO2(+)
12 VO2(–)
26 VO4(+)
27 VO4(–)
2 VO1(+)
1 VO1(–)
A
C
B
D
E
F
LD
PD
CD DSP
IC721
(EXCEPT US)
(US)
21
FDO
23
SLDO
22
SPDO
25
CONT4
A
B
D
E
F
C
I-V AMP
DETECTOR
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
M702
(SPINDLE)
M701
(SLED)
M
M
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC722
(EXCEPT US)
(US)
49
48
X701
16.9344MHz
S701
(LIMIT)
79 DATAIN
80 DATACK
5 C2FIN
1 LRSY
2 ADDATA
3 ADBCK
4 ADLRCK
7 CKIN
9 CKOUT
78 RESB
99 CD DO
98 CD DI
100 C D CLK
5 CD CE
97 CD WRQ
95 CD DRF
4 CD RESET
60
DATA
59
DATACK
52
C2F
58
LRSY
29 OE45OEB
15 WE42WEB
16 RAS41RASB
31 LCAS43CASLB
30 UCAS44CASUB
57
ASDFIN
56
ASDACK
55
ASLRCK
54
16MOUT
106
76 66
53
EFLG
50
FSX/16MIN
73 CMDOUT
74 CMDIN
CE FSYNC
MP3 CE
MP3 SYNC
75 CL
26MP3RES
64
DO
63
DI
62
CL
74CD NUMBER SENS
20CD BUSY
9RIN LM-R
11RESET
1MUTE
94POWER
27HOLD
MUTE
POWER
HOLD
61
CE
65
WRQ
67DRF
66RES
4 OUT1
2 OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
MP3 DECODER
IC801
IC802
MEMORY
SYSTEM CONTROLLER
IC901 (1/2) S751
OPEN/CLOSE
DETECT
OPEN
CLOSE
LEVEL SHIFT
Q731
TABLE ADDRESS
SENSOR
IC731
+
ROTARY
ENCODER
S711
7FIN LM-F
9RIN TM-R
4 OUT1
2 OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7FIN TM-F
LM-L, LM-R,
TM-L, TM-R
D
O-MUTE,
O-POWER,
HOLD
B
42
LCHO
45
RCHO R-CH
CD
A
APC
FIN2
FIN1
LDD
LDS
TIN2
TIN1
XOUT
XIN
RF 4EFMIN
3ERROR
CORRECT
EQ,
AGC
COMMAND
INTERFACE
CLOCK
GENERATOR
PH, BH
RF AMP
TBAL A/D
CONVERTER
D/A
CONVERTER
EXTERNAL
AUDIO IN
SERIAL OUT
D/A
CONVERTER
SERVO
PROCESSOR
AUTOMATIC
POWER CONTROL
Q701
18POWER DOWN P-DOWN
RESET
RESET,
P-DOWN
C
• SIGNAL PATH
: CD
• R-ch is omitted due to same as L-ch.
(Page 22)
(Page 22)
(Page 22)
(Page 22)
2-5, 7-10,
35-38, 40-43 23-30, 33-4060-53, 50
18-21, 24-28
(EXCEPT US)
I/O1 – I/O16
A0 – A8
MDATA0
– MDATA15
MADRS0
– MADRS8