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SERVICE MANUAL
COMPACT DISC DECK RECEIVER
AEP Model UK Model E Model Australian Model
CX-JN1
Ver. 1.4 2004.10
9-877-271-05
Sony Corporation
2004J05-1
Personal Audio Company
© 2004.10
Published by Sony Engineering Corporation
SPECIFICATIONS
CX-JN1 is the amplifier, CD player, tape deck and tuner section in JAX-N1/PK1.Model Name Using Similar MechanismNEW CD Mechanism TypeCDM74S-K6BD72 CD Base Unit NameBU-K6BD72 Section Optical Block NameKSM-213DCP Optical Pick-up NameKSS-213D Tape deck Model Name Using Similar MechanismNEW Section Tape Transport Mechanism typeCWM43FF13
TUNER
FM Except CIS model:tuning range 87.5 MHz to 108 MHz FM AEP, UK models: CIS model: Except AEP, UK, CIS models: usable sensitivity (IHF)16.8 dBf FM antenna terminal75 ohms (unbalanced)AM AEP, UK, CIS, E, EA, TW models:E51 model:tuning range 531 kHz to 1602 kHz AM usable sensitivity350
µ
V/m SP, KR, AUS models:530 kHz to 1710 kHz (10 kHz step) 531 kHz to 1602 kHz (9 kHz step) AM antennaLoop antenna
AMPLIFIER
Power AEP, UK, CIS models: Except AEP, UK, CIS models: output Rated: 12 W + 12 W (6 ohms, 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 Total harmonic distortion0.08 % (6 W, 1 kHz, 6 ohms, DIN AUDIO)
CASSETTE DECK
Track format4 tracks, 2 channels stereo Frequency response50 Hz – 8 kHz Recording systemAC bias HeadsDeck A: playback x 1 Deck B: recording/playback x 1,erase x 1
CD PLAYER
LaserSemiconductor laser(
λ
= 780 nm)Emission duration:continuous D/A converter1 bit dual Signal-to-noise ratio85 dB (1 kHz, 0 dB)Harmonic distortion0.05 % (1 kHz, 0 dB)
GENERAL
Power AEP, UK, CIS models: E, E51, SP, TW models: AEP, UK, CIS models: AEP, UK, CIS models: KR model: AUS model: Except AEP, UK, CIS models: (Except AEP, UK, CIS models)requirements 230 V AC, 50/60 Hz Power consumption 40 W Power consumptionWith ECO mode on: 0.25 W in standby modeWith ECO mode off: 15 W Dimensions (W x H x D)280 x 330 x 392.5 mm Weight 6.1 kg
Specifications and external appearance are subject to change without notice.
CIS model:65 MHz to 74 MHz (10 kHz step)87.5 MHz to 108 MHz (50 kHz step)15.3 dBf (65 MHz to 74 MHz)12.8 dBf (87.5 MHz to 108 MHz)13.2 dBf 530 kHz to 1710 kHz (10 kHz step)531 kHz to 1710 kHz (9 kHz step)Rated: 36 W + 36 W (1 kHz, T.H.D. 1%, 6 ohms)Reference: 45 W + 45 W (1 kHz,T.H.D. 10 %, 6 ohms)110 220 V AC, 60 Hz 240 V AC, 50 Hz/60 Hz- 120V / 220 - 240V AC(Switchable), 50 Hz/60 Hz EA models: 120 - 127V / 220 V AC (Switchable), 50 Hz/60 Hz 74 W E, EA, SP, TW, KR, AUS models: 6.8 kg E51 model: 6.7 kg InputVIDEO/AUX: 400 mV OutputsSPEAKER: MIC: 1.7 mV (10k ohms)6 ohms or more PHONES: 32 ohms or more
– Continued on next page –
CX-J N1
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
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 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.
COPYRIGHT
Check copyright laws relevant to recordings from discs, tuner or tape for the country where the unit is to be used.Licensed by BBE Sound, Inc. under USP4638258, 5510752 and 5736897.
•Abbreviation AUS: Australian model EA: Saudi Arabia model E51: Chilean and Peruvian models KR: Korean model SP: Singapore model TW: Taiwan model
Ver 1.2
CX-JN1
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, CIS, MX, KR, AUS).....................................38 6-21.Schematic Diagram – PT Section –(AEP, UK, CIS, MS, KR, AUS)......................................39 6-22.Printed Wiring Board – PT Section –(E, E51, SP, TW).............................................................40 6-23.Schematic Diagram – PT Section –(E, E51, SP, TW).............................................................41 6-24.IC Pin Function Description...........................................45
7.EXPLODED VIEWS
7-1.Case Section....................................................................47 7-2.Front Panel Section-1......................................................48 7-3.Front Panel Section-2......................................................49 7-4.Front Panel Section-3......................................................50 7-5.Front Panel Section-4......................................................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
Ver 1.2
•
•Abbreviation AUS: Australian model EA: Saudi Arabia model E51: Chilean and Peruvian models KR: Korean model SP: Singapore model TW: Taiwan model
4
CX-JN1 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 –
MODELPART No.
CIS model4-245-154-4
[]
E, Singapore and Taiwan models4-245-201-0
[]
Chilean and Peruvian models4-245-201-2
[]
AEP and UK models4-245-201-3
[]
Korean and Australian models4-245-201-6
[]
Saudi Arabia model4-245-279-0
[]
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.
Ver 1.2
5
CX-JN1
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-JN1
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)BD board (CN710)Connect wire (flat type) (13 core) to panel board (CN601) and mechanical deck.panel board (CN601)main board (CN301)
7
CX-JN1 SECTION 2 GENERAL
This section is extracted from instruction manual.
En
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/Programmed playback, etc.) when used in combination with ENTER and MULTI JOG.
4
ENTER
Fixes the modes and the time (ECO, Repeat/Shuffle/Programmed playback, clock, and timer, etc.) when used in combination with ENTER and MULTI JOG.
!
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)
Displays a program type for RDS (Radio Data System)
RT (AEP, UK)
Displays text information for RDS (Radio Data System)
&
c
PLAY/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 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
PAUSE/SET
CD and Tape: pauses playback.Tuner: stores the received station in to preset.
Mainunit: front
5
MULTI JOG
When used in combination with ENTER and MULTI JOG,CD: selects a track and Repeat/Shuffle/Programmed playback.Tuner: selects a preset station.Tape: specifies tape length.Clock and Timer: sets the time.i-Bass: selects a frequency range.Spectrum analyzer, ECO and Dimmer: selects the mode.
6
PHONES jack
Plug in here an optional headphones set with a mini stereo plug (ø3.5 mm). Speaker output is canceled.
7
SYNC DUB
Starts dubbing a whole tape.
w
REC/REC MUTING
Starts recording.
8
DISC DIRECT PLAY 1-3
Selects a disc.
9
z
OPEN/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.
*
MIC MIXING (Except AEP, UK, CIS)
Adjusts the microphone volume.
MIC jack (Except AEP, UK, CIS)
Connects the microphone here.
Mainunit: rear
1
AM LOOP, FM 75
Ω
terminals
Plug in the supplied AM and FM antennas here.
2
VIDEO/AUX jacks
Accepts analog sound signals from external equipment.Connect using an optional connecting cable with RCA phono plugs (red plug to R jack, white plug to L jack).Refer also to the operating instructions of your equipment.To switch function to external input, press VIDEO/AUX.
Tip:
To change the displayed name for this function, turn the unit on, then hold down VIDEO/AUX and press POWER on the unit. Repeat the procedure to select "
VIDEO
","
AUX
" or "
TV
".
3
#
SPEAKER terminals
Connect the speaker cord of the supplied front speakers here.
4
AC voltage selector (E, Chilean, Peruvian, Saudi Arabia, Singapore, Taiwan)
Switches AC voltage between 110 - 120V and 220 - 240V.Make sure it matches your local voltage.
5
AC power cord
•LOCATION OF CONTROLS
Ver 1.2
8
CX-JN1
Buttons with the same or similar names with the main unit basically have the same function.
1
POWER
2
1-0/10, +10
CD: selects a CD track of the specified number.Tuner: tunes in to the station with the specified preset number.
The numbered buttons take on these functions below when pressed with SHIFT held down
:
EDIT
Enters AI Edit Recording or Programmed Edit Recording mode when pressed in stop mode.
BAND
Selects Tuner function and the radio band.
TAPE A/B TUNER MODE
Switches between stereo or monaural FM reception.
3
r
,
t
CD: selects a track.Tuner: selects a preset station.Tape: specifies tape length.BASS and TREBLE: adjusts the level.Clock and Timer: sets the time.
4
PLAY MODE
Selects Shuffle or Programmed playback in CD function.
REPEAT
Enters CD repeat playback mode.
ENTER
5
CLOCK/TIMER/SET
Enters timer setting mode.
CLOCK/TIMER/SELECT
Selects timer playback, timer recording or timer off.
6
DISPLAY
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, TAPE, TUNER and VIDEO (AUX or TV).
9
DISC SKIP
Select a disc.
0
c
/
d
When the unit is turned off: activates or deactivates DEMO.CD and Tape: starts playback.
s
CD and Tape: stops playback.
f
,
g
CD: searches a track in fast forward or fast reverse playback when held down.Tape: fast forwards or rewinds the tape.Tuner: manually tunes down or up within the band.
a
CD and Tape: pauses playback.
!
SLEEP
Switches the sleep-timer on/off and selects the duration.
@
VOLUME (
+
,
-
)
Adjusts the volume.
#
SOUND
Selects BASS or TREBLE setting mode
CLEAR
Clears a track of the CD programmed playback and a Radio preset station.
Note
The The button not explained above (
KARAOKE
) does not operate for AEP, UK and CIS models.buttons not explained above (
ALBUM
N
,
M
and
SPECTRUM
) do not operate for this unit.
Remote control
KARAOKE (Except AEP, UK, CIS)
Selects a Multiplex mode.
Setting the clock
Use the remote.
1
Press CLOCK/TIMER/SET.
Go to step 3 when the time appears and the 'hour' flashes.
2
Press
r
or
t
repeatedly until "
CLOCK SET
" appears in the display and then press ENTER.
3
Press
r
or
t
repeatedly to set the hour and then press ENTER.
4
Press
r
or
t
repeatedly to set the minute and then press ENTER.
The time display stops flashing and the clock starts from 00 seconds.•MULTI JOG is also available in place of
r
or
t
.
To display the time
Press DISPLAY on the remote. The time will be displayed for 6 seconds.
If "
- -:- -
" appears when the unit is turned off
There has been a power interruption. Re-set the clock.
Ver 1.1
CX-JN1
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 8)3-3.CASE (TOP)(Page 8)3-4.TRAY PANEL(Page 9)3-6.FRONT PANEL SECTION (Page 10)3-8.REAR CABINET SECTION (Page 11)3-7.MECHANICAL DECK (CWM43FF13)(Page 10)3-9.PT BOARD,MAIN BOARD (Page 11)3-14.MOTOR GEAR ASSY (SLED) (M701),BD BOARD (Page 14)3-13.BASE UNIT (BU-K6BD72)(Page 13)3-10.TABLE ASSY (Page 12)3-11.MOTOR (TB)BOARD (Page 12)3-12.MOTOR (LD)BOARD (Page 13)3-5.CD MECHANISM DECK (CDM74S-K6BD72)(Page 9)
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-JN1
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 screws
1
two case screws
3 4
case (top)
2
claw
2
claw
1
two screws (BVTP3
×
10)
2
claw
2
claw
CX-JN1
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-JN1
12
3-6.FRONT PANEL SECTION 3-7.MECHANICAL DECK (CWM43FF13)
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)
4
ground mechanical plate
2
six screws (BVTP3
×
10)
1
wire (flat type) (13 core)
3
mechanical deck (CWM43FF13)
CX-JN1
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)(15 core: AEP, UK)(CN801)
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 (BVIT3B)
5
screw (BVTP3
×
10)
7
two screws (ITC+4-8)
7
two screws (ITC+4-8)
1
two screws (BVIT3B)
3
connector (CN090) (E, E51, SP, TW)(CN091) (EXCEPT E, E51, SP, TW)
(E, E51, EA, SP, TW)
(EXCEPT
E, E51, EA, 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 (ITC+4-8)
•
Abbreviation E51: Chilean and peruvian models EA: Saudi Arabia model
8
two screws (ITC+4-8)SP: Singapore model TW: Taiwan model
Ver 1.2
CX-JN1
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) board
3
belt (table)
CX-JN1
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-JN1
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-JN1 SECTION 4 TEST MODE
MC COLD RESET
•The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.
Procedure:
1.In the standby status, while pressing the
x
button, press the
[POWER]
button.2.The set is reset, then becomes standby status.
GC TEST MODE
Procedure:
1.Press the
[POWER]
button to turn the power on.2.While pressing the
x
button, press the
[POWER]
button for 5 seconds.3.It change displays in order of model type, version and suffix at 2 seconds interval, then the display is back to normal status.
AMP TEST MODE
Procedure:
1.In the status where AC plug is disconnected, while pressing the
[VIDEO/AUX]
button, connect the AC plug to turn the power on. Then enter the AMP test mode and display “AMP TEST”.2.If turn the
[VOLUME]
knob clockwise, it displays “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
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.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
x
button, 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)
•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 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”.
Ver 1.1
18
CX-JN1
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.
ButtonOperationPurpose of use
M
Move the pick-up to outside trackSled circuit check
m
Move the pick-up to inside trackTracking circuit check Mechanism operation check Optical pick-up check
N
Playback a CDServo block check If it cannot focus on, it continuous focus search
x
When playback a CD: stop playbackAPC circuit check When stop a CD:Laser current measure display “READING” (blink)Focus search waveform check continuous laser diode onTracking balance check continuous focus search (not made focus on)
X
Pause, Tracking servo off (ignore CLV error)
CX-JN1
19 19
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 10M
Ω
impedance.4.Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.
S-CURVE CHECK
Procedure :
1.Connect an oscilloscope to TP (FE) and TP (VC).2.Turn the power on.3.Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)4.Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3
±
0.5 Vp-p.
Note:
•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
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