Aiwa CX-JN10 User manual

SERVICE MANUAL
TUNER
FM tuning range 87.5 MHz to 108 MHz
FM
AEP, UK models:
Except AEP, UK models:
usable sensitivity (IHF) 16.8 dBf
FM antenna terminal 75 ohms (unbalanced)
AM
AEP, UK, E, EA, TW models:
E51 model:
tuning range 531 kHz to 1602 kHz
AM usable sensitivity 350 µV/m
SP, AUS models: 530 kHz to 1710 kHz (10 kHz step) 531 kHz to 1602 kHz (9 kHz step)
AM antenna Loop antenna
AMPLIFIER
Power
AEP, UK models:
Except AEP, UK models:
output Rated:12W+12W(6ohms,T.H.D.
1 %, 1 kHz/DIN 45500)
Reference: 15 W + 15 W (6 ohms,
T.H.D. 10 %, 1 kHz/DIN 45324)
MUSIC POWER: 27 W +27 W
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)
AEP, UK models:
AEP, UK models:
Except AEP, UK models:
Power consumption 40 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 6.1 kg
Specificationsand externalappearance aresubject tochange
without notice.
13.2 dBf
530 kHz to 1710 kHz (10 kHz step)
531 kHz to 1710 kHz (9 kHz step)
Rated:36W+36W(1kHz, T.H.D.1
%, 6 ohms)
Reference: 45 W + 45 W (1 kHz,
T.H.D. 10 %, 6 ohms)
74 W
E, EA, SP, TW, AUS models: 6.8 kg
E51 model: 6.7 kg
Total harmonic distortion 0.08 % (6 W, 1 kHz, 6 ohms, DIN
AUDIO)
(Except AEP, UK models)
Input VIDEO/AUX: 400 mV
Outputs SPEAKER:
MIC: 1.7 mV (10k ohms)
6 ohms or more
PHONES: 32 ohms or more
COPYRIGHT
Checkcopyrightlawsrelevanttorecordingsfromdiscs,tuner
or tape for the country where the unit is to be used.
GENERAL
Power
AEP, UK models:
E, E51, SP models:
TW model:
requirements 230 V AC, 50/60 Hz
110
120 V AC, 50 Hz/60 Hz
- 120V / 220 - 240V AC
(Switchable), 50 Hz/60 Hz
EA model: 120 - 127V / 220 V AC
(Switchable), 50 Hz/60 Hz
AUS model: 240 V AC, 50 Hz/60 Hz
COMPACT DISC DECK RECEIVER
AEP Model
UK Model
E Model
Australian Model
CX-JN10
Ver 1.0 2004.03
9-877-593-01 Sony Corporation
2004C05-1 Home Audio Company
© 2004.03 Published by Sony Engineering Corporation
SPECIFICATIONS
CX-JN10 is the tuner, amplifier, cassette deck
and CD player section in JAX-N10/PK10.
Model Name Using Similar Mechanism CX-JN1
CD Mechanism Type CDM74S-K6BD72
CD Base Unit Name BU-K6BD72
Section Optical Pick-up Block Name KSM-213DCP
Optical Pick-up Name KSS-213D
Tape deck Model Name Using Similar Mechanism CX-JN1
Section Tape Transport Mechanism type CWM43FF13
•Abbreviation
AUS : Australian model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
SP : Singapore model
TW : Taiwan model

CX-JN10
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.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.

CX-JN10
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 (CDM74S-K6BD72)................... 11
3-6. Front Panel Section ......................................................... 12
3-7. Mechanical Deck (CWM43FF13) .................................. 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-K6BD72)................................................ 15
3-14. Motor Gear Assy (Sled) (M701), BD Board .................. 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 – ........................... 24
6-6. Schematic Diagram – BD Section – .............................. 25
6-7. Printed Wiring Boards – CHANGER Section –............ 26
6-8. Schematic Diagram – CHANGER Section – ................ 27
6-9. Schematic Diagram – MAIN Section (1/4) –................ 28
6-10. Schematic Diagram – MAIN Section (2/4) –................ 29
6-11. Schematic Diagram – MAIN Section (3/4) –................ 30
6-12. Schematic Diagram – MAIN Section (4/4) –................ 31
6-13. Printed Wiring Board – MAIN Section – ...................... 32
6-14. Printed Wiring Board – HP Section – ........................... 33
6-15. Schematic Diagram – HP Section – .............................. 33
6-16. Printed Wiring Board – PANEL Section – .................... 34
6-17. Schematic Diagram – PANEL Section – ....................... 35
6-18. Printed Wiring Boards – KEY Section – ....................... 36
6-19. Schematic Diagram – KEY Section – ........................... 37
6-20. Printed Wiring Board – PT Section –
(AEP, UK, AUS).............................................................. 38
6-21. Schematic Diagram – PT Section –
(AEP, UK, AUS).............................................................. 39
6-22. Printed Wiring Board – PT Section –
(E, EA, E51, SP, TW) ..................................................... 40
6-23. Schematic Diagram – PT Section –
(E, EA, E51, SP, TW) ..................................................... 41
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 47
7-2. Tape Deck Section .......................................................... 48
7-3. Panel Board Section ........................................................ 49
7-4. Key Section ..................................................................... 50
7-5. Front Cabinet Section ..................................................... 51
7-6. Chassis Section ............................................................... 52
7-7. CD Mechanism Deck Section-1
(CDM74S-K6BD72) ....................................................... 53
7-8. CD Mechanism Deck Section-2
(CDM74S-K6BD72) ....................................................... 54
7-9. CD Mechanism Deck Section-3
(CDM74S-K6BD72) ....................................................... 55
7-10. Base Unit Section (BU-K6BD72) .................................. 56
8. ELECTRICAL PARTS LIST ............................... 57
•
•Abbreviation
AUS : Australian model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
SP : Singapore model
TW : Taiwan model

4
CX-JN10 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.
AEP and UK models No model number label
Taiwan model 4-248-949-2[]
Singapore model 4-249-031-6[]
Australian model 4-249-128-2[]
Saudi Arabia model 4-249-129-6[]
E model 4-249-130-8[]
Chilean and Peruvian models 4-249-802-3[]
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.
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
While pressing the xkey, press the OPEN/CLOSE Zkey for 5
seconds. The message “UNLOCKED” is displayed and the tray is
unlocked.
Note: When “LOCKED” is displayed, the tray lock is not released by
turning power on/off with the [POWER] key.

5
CX-JN10
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-JN10
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)
main board (CN302)

7
CX-JN10
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/
Programmed playback, etc.) when used in combination
with ENTER and MULTI JOG.
4ENTER
Fixes the modes and the time (ECO, Repeat/Shuffle/
Programmed playback, clock, and timer, etc.) when
used in combination with ENTER and MULTI JOG.
!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.
^PTY (AEP, UK models)
Displays a program type for RDS (Radio Data System)
RT (AEP, UK models)
Displays text information for RDS (Radio Data System)
&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.
Main unit: front
Refer to the pages indicated in parentheses for details.
5MULTI 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.
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.
0TAPE 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.
*MIC MIXING (Except AEP, UK models)
Adjusts the microphone volume.
MIC jack (Except AEP, UK models)
Connects the microphone here.
SECTION 2
GENERAL This section is extracted from
instruction manual.
•LOCATION OF CONTROLS
Main unit: rear
Refer to the pages indicated in parentheses for details.
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, 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.
4AC voltage selector (E, Saudi Arabia,
Chilean, Peruvian, Singapore models)
Switches AC voltage between 110 - 120V and 220 - 240V.
(E, Chilean, Peruvian, Singapore models)
Switches AC voltage between 110 - 127V and 220 - 240V.
(Saudi Arabia model)
Make sure it matches your local voltage.
5AC power cord

8
CX-JN10
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: 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
EntersAIEditRecordingorProgrammedEditRecording
mode when pressed in stop mode.
BAND
Selects Tuner function and the radio band.
TAPE A/B
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 Programmed playback in CD
function.
REPEAT
Enters CD repeat playback mode.
ENTER
5CLOCK/TIMER/SET
Enters timer setting mode.
CLOCK/TIMER/SELECT
Selects timer playback, timer recording or timer off.
6DISPLAY
Displays the time and the remaining time for CD.
7SHIFT
Holddownwhenpressinganumberedbuttontochange
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
youbeabletoselectTunerfunctionandtheradioband.
You can first press SHIFT, then a numbered button.
8FUNCTION
Switchestheactivefunction 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 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 (ALBUM N,M,
SPECTRUMand KARAOKE)do notoperate forthis
unit.
Remote control
Refer to the pages indicated in parentheses for details.
Setting the clock
Use the remote.
1 Press CLOCK/TIMER/SET.
Gotostep3whenthetimeappearsandthe'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.
Thetimedisplaystops flashing and the clockstartsfrom
00 seconds.
•MULTI JOG is also available in place of ror t.
To display the time
PressDISPLAY on the remote. Thetimewillbe displayed for
6 seconds.
Tip: (Except AEP, UK models)
"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.

CX-JN10
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)
(Page 12)
3-9. PT BOARD,
MAIN BOARD
(Page 13)
3-14. MOTOR GEAR ASSY (SLED) (M701),
BD BOARD
(Page 16)
3-13. BASE UNIT
(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
(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-JN10
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-JN10
11
3-4. TRAY PANEL
3-5. CD MECHANISM DECK (CDM74S-K6BD72)
5 CD mechanism deck
(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-JN10
12
3-6. FRONT PANEL SECTION
3-7. MECHANICAL DECK (CWM43FF13)
3 screw
(BVWHTP)
4 HP board
9 front panel section
7 three screws
(BVTP3
× 10)
5 wire (flat type) (11 core)
(CN694)
6 connector
(CN301)
6 connector
(CN302)
1 screw
(BVTP3
× 10)
2 terminal
8 connector
(CN101)
5 ground mechanical plate
2 six screws
(BVTP3
× 10)
1 wire (flat type) (13 core)
4 mechanical deck
(CWM43FF13)
3 clamp

CX-JN10
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)
(11 core: EXCEPT AEP, UK) (CN801)
(15 core: AEP, UK) (CN802)
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 (BV B3)
5 screw
(BV B3)
7 two screws
7 two screws
1 two screws
(BV B3)
3 connector
(CN090) (E, EA, E51, SP, TW)
(CN091) (EXCEPT E, EA, E51, SP, TW)
(E, EA, E51, SP,TW)
(EXCEPT E, EA, E51, SP,TW )
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
• Abbreviation
E51 : Chilean and peruvian models
EA : Saudi Arabia model
8 two screws
SP : Singapore model
TW :Taiwan model

CX-JN10
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 table (loading)
4 connector
(CN731)
1 screw
(PTPWH M2.6)
5 two screws
(BTTP M2.6)
6 MOTOR (TB) boar
d
3 belt (table)

CX-JN10
15
3-12. MOTOR (LD) BOARD
3-13. BASE UNIT (BU-K6BD72)
2 connector
(CN704)
3 two screws
(BTTP M2.6)
4 MOTOR (LD) board
1 belt (loading)
3 three coil springs
(insulator)
7 three insulators
9 base unit
(BU-K6BD72
)
6
1
three screws
(BTTP M2.6)
2 three stoppers (BU)
5 coil spring
(insulator)
8 insulator
4 screw
(PTPWH M2.6)

CX-JN10
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 (BTP2.6 × 8)
9 Remove two solders.
4
3-14. MOTOR GEAR ASSY (SLED) (M701), BD BOARD

17
CX-JN10
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 Z
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 Zbutton 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.
CHANGE-OVER OF AM TUNER STEP BETWEEN
9 kHz AND 10 kHz (Except AEP and UK models)
•A step 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 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”.

18
CX-JN10
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-JN10
1919
CD SECTION
Note:
1. CDBlock isbasically designed tooperate withoutadjustment.Therefore,
check each item in order given.
2. UseYEDS-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) –
SECTION 5
ELECTRICAL ADJUSTMENTS

CX-JN10
2020
8
7
9
10
80
79
70 LIMIT SW
20
TDO
18
10
VO3 (+)
FOIN
20TIN
3SPIN
7MUTE
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
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
SLED/SPINDLE MOTOR DRIVE,
FOCUS/TRACKING COIL DRIVE
IC722
49
48
X701
16.9344MHz
S701
(LIMIT IN)
99 CD DO
98 CD DI
100 C D CLK
5CDCE
97 CD WRQ
95 CD DRF
4CD RESET
60
DATA
59
DATACK
52
C2F
58
LRSY
57
ASDFIN
56
ASDACK
55
ASLRCK
54
16MOUT
53
EFLG
50
FSX/16MIN
64
DO
63
DI
62
CL
74CD NUMBER SENS
20CD BUSY
9RIN LM-R
11RESET
1SYS-MUTE
94POWER
27HOLD
MUTE
POWER
HOLD
61
CE
65
WRQ
67DRF
66RES
4OUT1
2OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
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
4OUT1
2OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7FIN TM-F
LM-L, LM-R,
TM-L, TM-R
D
MUTE,
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 PLAY
•R-ch is omitted due to same as L-ch.
DISC TRAY
ADDRESS DETECT
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD Section –
(Page 22)
(Page 22)
(Page 22)
(Page 22)