Aiwa CXJT-7 Service manual

CX-JT7

TUNER

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

AMPLIFIER

Power output Rated: 80 W + 80 W (6 ohms, T.H.D.

1 %, 1 kHz/DIN 45500) Reference: 100 W + 100 W (6 ohms, T.H.D. 10 %, 1 kHz/DIN 45324) MUSIC POWER: 225 W + 225 W

Total harmonic distortion 0.08 % (50 W, 1 kHz, 6 ohms, DIN

AUDIO) Input MD (VIDEO): 1.5 V 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 230 V AC, 50/60 Hz Power consumption 130 W Power consumption With ECO mode on: 0.25 W in standby mode With ECO mode off: 20 W Dimensions (W x H x D) 280 x 328 x 437 mm (AEP, UK, CIS)

280 x 328 x 446 mm (MX, E51) Weight 8.4 kg (AEP, UK, CIS)

9.3 kg (MX, E51)

Specifications and external appearance are subject to change without notice.

COPYRIGHT

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

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

SERVICE MANUAL

Ver 1.0 2003.04

CX-JT7 is the tuner, amplifier, cassette deck and CD player section in JAX-T7 and JAX-PK7.

Model Name Using Similar Mechanism NEW

CD Section

Tape deck Section

CD Mechanism Type CDM74F-K6BD71A Base Unit Name BU-K6BD71A Optical Block Name KSM-213DCP Optical Pick-up Name KSS-213D Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type

AEP Model

UK Model

E Model

CWM43FR16 CWM43RR23

9-877-252-01 Sony Corporation

2003D0500-1 Home Audio Company C 2003.04 Published by Sony Engineering Corporation

SPECIFICATIONS

•Abbreviation E51 : Chilean and Peruvian models MX : Mexican model

COMPACT DISC DECK RECEIVER

CX-JT7

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

CLASS 1 LASER PRODUCT LUOKAN 1 LASER LAITE KLASS 1 LASER APPARAT

as a CLASS 1 LASER product.

This label is located on the rear exterior.

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

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.

Chilean and Peruvian models 4-245-109-4 AEP, UK, CIS and Mexican models 4-245-109-5

• DISCRIMINATION

Either type of the MAIN board, Part No. 1-688-080-11 or 1-688080-13 is used for Chilean and Peruvian models.

Note: For other models, only one type of the MAIN board, Part No. 1-

688-080-13 is used.

How to identify the type is described below.

[]

: 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.

– MAIN BOARD (Conductor Side) –

D324

CN309

IC303

D324

Suffix-11 × Suffix-13 a

CN312

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

3

Pull-out the disc tray.

CX-JT7

5

CX-JT7

SERVICE POSITION – CD mechanism deck –

main board (CN312)

– Tape mechanism deck –

BD board (CN710)

panel board (CN801)

Connect wire (flat type) (19 core) to main board (CN312) and BD board (CN710).

Connect wire (flat type) (13 core) to panel board (CN801) and mechanical deck.

main board (CN203)

6

• LOCATION OF CONTROLS

# BASS

Adjusts low frequency sound.

SURROUND

Switches surround on and off.

i-Bass

Produces rich and clear low frequency sound.

$ DISPLAY

Displays the time and the remaining time for CD. When the unit is off, press DISPLAY to switch between DEMO, Clock and ECO display modes.

ALBUM k/i

Selects a previous album or a succeeding album with MP3-CDs.

PTY (AEP and UK models)

Displays a program type for RDS (Radio Data System)

% rTUNING DOWN, t TUNING UP

(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.

aPAUSE

CD and Tapes: pauses playback.

dDIR (TAPE B)

CD and Tapes: starts playback.

sSTOP

CD and Tapes: stops playback.

SECTION 2

GENERAL

CX-JT7

This section is extracted from instruction manual.

Main unit: front

Refer to the pages indicated in parentheses for details.

1 DISC CHANGE/DISC SKIP

Rotates the CD trays.

2 POWER 6STANDBY/ON

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

3 TAPE A/B

Selects Tape function, and deck A or B.

TUNER BAND

Selects Tuner function and the radio band.

MD (VIDEO)

Selects the function of external equipment connected to MD (VIDEO) jacks.

CD

Selects CD function.

4 TREBLE/MIDDLE

Enhances high or middle frequency sound.

5 CD SYNC

Starts Automatic CD dubbing.

REC PAUSE/ST ART

Starts recording.

6 PHONES jack

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

MIC jack (Mexican, Chilean and Peruvian models)

Connects the microphone here.

MIC MIXING (Mexican, Chilean and Peruvian models)

Adjusts the microphone volume.

7 DISC DIRECT PLAY 1-3

Selects a disc.

8 zOPEN/CLOSE

Opens or closes the disc compartment.

9 HEAVY, VOCAL, SALSA, TECHNO,

HIP HOP, MANUAL

Activates a graphic equalization curve.

0 MODE

Selects various modes (Play mode and Tape reverse, etc.) when used in combination with ENTER and MULTI JOG.

ENTER

Fixes the modes and the time (Play mode and Tape reverse, etc.) when used in combination with MODE and MULTI JOG.

! MULTI JOG

CD: skips to a previous or a succeeding track. Tuner: selects a preset station. Clock and Timer: sets the time. Selects the mode and the time when used in combination with MODE and ENTER.

@ VOLUME (10)

Adjusts the volume.

Main unit: rear

Refer to the pages indicated in parentheses for details.

1 AM LOOP,

Plug in the supplied AM and FM antennas here.

2 MD (VIDEO) 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 MD (VIDEO).

Tip:

To change the displayed name for this function, turn the unit on, then hold down MD (VIDEO) and press POWER on the unit. Repeat the procedure to select “MD” or “VIDEO”.

3 SPEAKER terminals

Connect the speaker cord of the supplied front speakers here.

4 AC power cord 5 AC VOLTAGE selector (Chilean and

Peruvian models)

Switches AC voltage among 120V, 220V , and 230V - 240V . Make sure it matches your local voltage.

FM 75 Ω terminals

7

CX-JT7

Remote control

Refer to the pages indicated in parentheses for details.

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

1 POWER 2 1-0/10, +10

Selects a CD track of the specified number.

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

EDIT

Enters Automatic CD dubbing mode when pressed in stop mode.

BAND

Selects Tuner function and the radio band.

TAPE A/B

Selects Tape function, and deck A or B.

SPECTRUM

Changes the spectrum analyzer display.

TUNER MODE

Switches between stereo or monaural FM reception.

KARAOKE (Mexican, Chilean and Peruvian models)

Selects Vocal Fader mode.

GEQ

Enters Graphic Equalizer setting mode.

TUNER MEMORY

Tuner: stores the received station in to preset.

SURROUND

Switches surround on and off.

:

3 r, t

CD: selects a track. Tuner: selects a preset station. BASS, MID and TREBLE: adjusts the level. Clock and Timer: sets the time.

4 ALBUM M/ N

Selects a previous album or a succeeding album.

5 PLAY MODE

CD: selects a playback mode. Tape: selects a reverse mode

REPEAT

Enters CD repeat playback mode.

ENTER

6 CLOCK/TIMER/SET

Enters timer setting mode.

CLOCK/TIMER/SELECT

Selects timer playback, timer recording or timer off.

7 DISPLAY

Displays the time and the remaining time for CD. When the unit is off, press DISPLAY to switch between DEMO, Clock and ECO display modes.

8 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.

9 FUNCTION

Switches the active function among CD, TAPE, TUNER and MD (VIDEO).

0 DISC SKIP

Select a disc.

! c/d

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, MID or TREBLE setting mode

CLEAR

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

Note

(AEP, UK and CIS models)

The buttons not explained above (KARAOKE) do not operate for this unit.

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” 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. The time will be displayed for 6 seconds.

Tip: (Mexican, Chilean and Peruvian 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.

8

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

3-1. DISASSEMBLY FLOW

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

Set

3-2. CASE

(SIDE-L/R) (Page 10)

CX-JT7

SECTION 3

DISASSEMBLY

3-3. CASE (TOP)

(Page 10)

3-5. CD MECHANISM DECK

(CDM74F-K6BD71A) (Page 11)

3-6. FRONT PANEL

SECTION (Page 12)

3-7. MECHANICAL

DECK (Page 12)

3-4. TRAY PANEL

3-8. REAR CABINET

3-9. MAIN BOARD

(Page 11)

SECTION (Page 13)

(Page 13)

3-12. TABLE ASSY

(Page 15)

3-13. MOTOR (TB)

BOARD (Page 15)

3-14. MOTOR (LD)

BOARD (Page 16)

3-10. POWER

BOARD (Page 14)

3-15. BASE UNIT

(BU-K6BD71A) (Page 16)

3-16. MOTOR GEAR ASSY (SLED) (M701),

BD BOARD (Page 17)

3-17. OPTICAL PICK-UP

(KSS-213D) (Page 17)

3-11. TRANSFORMER BOARD

(Page 14)

9

CX-JT7

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

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

7

three screws (case3 TP2)

0

case (side-L)

8

9

6

3

two screws (BVTP3 × 10)

4

1

two screws (BVTP3 × 10)

5

case (side-R)

3-3. CASE (TOP)

4

claw

5

claw

7

case (top)

2

three screws (case3 TP2)

6

1

two screws (BVTP3

×

10)

2

claw

10

3

claw

3-4. TRAY PANEL

1

Turn the loading gear in the direction of arrow A.

2

Pull-out the disc table.

3

CX-JT7

A

four claws

tray panel

4

3-5. CD MECHANISM DECK (CDM74F-K6BD71A)

6

CD mechanism deck (CDM74F-K6BD71A)

1

wire (flat type) (19 core) (CN312)

5

two screws (BVTP3

2

connector (CN701)

×

10)

4

screw (BVTP3 × 10)

3

screw (BVTP3 × 10)

11

CX-JT7

)

3-6. FRONT PANEL SECTION

5

wire (flat type) (9 core) (CN311)

3

connector (CN202)

4

connector (CN203)

7

front panel section

3-7. MECHANICAL DECK

6

three screws (BVTP3

3

mechanical deck

×

10)

2

1

wire (flat type) (31 core) (CN304)

1

wire (flat type) (13core)

connector (CN310)

2

six screws (BVTP3

×

10

12

4

ground mechanical plate

6

rear cabinet section

5

five screws (BVTP3

×

10)

2

connector (CN303)

1

wire (flat type) (11core: CIS, MX, E51) (15core: AEP, UK)

4

cover (duct)

3

two screws (BVTP3

×

10)

3-8. REAR CABINET SECTION

CX-JT7

3-9. MAIN BOARD

3

main board

2

two connectors (CN502, CN503)

1

two screws (BVTP3

×

10)

13

CX-JT7

3-10. POWER BOARD

1

connector (CN902)

3

two screws (BVIT3B-8R W/O SLOT)

2

two screws (BVIT3B-8R W/O SLOT)

4

power board

3-11. TRANSFORMER BOARD

5

1

screw (BVTP3

×

10)

6

transformer board

four screws (ITC+4-8R)

4

2

screw (BVTT3

3

trans holder

×

8)

14

3-12. TABLE ASSY

)

d

two claws

5

CX-JT7

A

2

Pull-out the table assy.

6

table assy

3-13. MOTOR (TB) BOARD

1

screw (PTPWH M2.6)

2

table (loading)

1

Turn the loading gear in the direction of arrow

3

belt (table)

4

hook

3

wire (flat type) (5 core (CN702)

A

.

4

connector (CN731)

6

motor (TB) boar

5

two screws (BTTP M2.6)

15

CX-JT7

3-14. MOTOR (LD) BOARD

4

motor (LD) board

3

two screws (BTTP M2.6)

1

3-15. BASE UNIT (BU-K6BD71A)

belt (loading)

2

connector (CN704)

5

base unit (BU-K6BD71A)

16

4

four insulators

2

four stoppers (BU)

3

four coil springs (insulator)

1

four screws (BTTP M2.6)

)

3-16. MOTOR GEAR ASSY (SLED) (M701), BD BOARD

7

gear (A)

6

claw

2

two screws

×

3)

(P2

qa

BD board

1

Remove two solders.

8

gear (B)

5

wire (flat type) (16 core (CN708)

0

motor gear assy (SLED) (M701)

CX-JT7

3-17. OPTICAL PICK-UP (KSS-213D)

4

9

Remove two solders.

3

B

3

screw (P2.6 × 6)

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

B

.

2

sled shaft

A

1

Slide the lever in the direction of arrow

A

.

17

CX-JT7

SECTION 4

TEST MODE

[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. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [ENTER] and [POWER] simultaneously.

3. The message “RESET” is displayed on the fluorescent indicator

tube momentarily, then becomes standby states.

[TUNER STEP CHANGE-OVER] (Except AEP, UK and CIS models)

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

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [TUNER BAND] key to select “AM”.

3. Press the [POWER] key to turn the power OFF.

4. Press two keys of [ENTER] and [POWER] simultaneously.

5. The message “9K STEP” or “10K STEP” is displayed on the

fluorescent indicator tube, and thus the channel step is changed over.

[CD SHIP MODE]

• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press two keys of [CD] and [POWER] simultaneously.

4. The message “LOCK” is displayed on the fluorescent indicator

tube, and the CD ship mode is set.

[CHANGE-OVER FUNCTION OF MD/VIDEO]

• This mode is used to enable function of external input to change over between MD and VIDEO.

Procedure:

1. Set to standby state.

2. Press two keys of MD (VIDEO) and [POWER] simultaneously.

3. The message “MD” or “VIDEO”is displayed on the fluorescent

indicator tube, and the function of external input is changed over.

[CD TRAY LOCK MODE]

• This mode is used to unable to take sample disc out of tray in the shop.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. While pressing the x key, press the Z key for 5 seconds.

4. The message “LOCKED” is displayed on the fluorescent

indicator tube and the tray is locked. (Even if pressing the Z key, the message “LOCKED” is displayed on the fluorescent indicator tube and the tray is locked)

5. To release from this mode, while pressing the x key, press

the Z key for 5 seconds.

6. The message “UNLOCKED” is displayed on the fluorescent

indicator tube and the tray is unlocked.

[AMP TEST MODE]

•This mode is used to set the parameter of AMP IC for adjustment of tone quality and VACS level and display VACS status.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. P r ess three k eys of x , [HEAVY] and [HIP POP] simultaneously .

3. When the AMP test mode is activated, the message “AMP

TEST” is displayed on the fluorescent indicator tube momentarily.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed over to parameter setting of AMP IC and display of VACS status.

5. When the VACS ON, the message “V2255255” is displayed on

the fluorescent indicator tube, and when the VACS OFF, the message “2255255” is displayed on the fluorescent indicator tube.

6. Press the

7. Press the [ENTER] key, surround ON/OFF is changed over.

8. Press the [MANUAL] key, EQ band is changed over to LOW,

MID or HIGH.

9. Press the [HIP POP] and [TECHNO] key, EQ curve adjustment

value is changed over between –8dB to +8dB.

10. To release from this mode, press two keys of [HEAVY] and

[VOCAL] key, DBFB ON/OFF is changed over.

[TECHNO] simultaneously.

18

CX-JT7

[AGING MODE]

• This mode can be used for operation check of CD section and tape deck section. CD section and tape deck section work in parallel.

If an error occurred:

The aging operation stops only an error occurred sections and display then status.

If no error occurs:

The aging operation continues repeatedly.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Set disc on the tray and set tape into the deck.

4. Set the “ALL DISCS” mode and “REV OFF” mode.

5. Press three keys of x , [HEAVY] and [DISC CHANGE/DISC SKIP]

simultaneously.

6. The message “AGING” is displayed on the fluorescent indicator

tube momentarily, then aging operations of CD and tape are started at the same time.

7. To release from this mode, operate the “COLD RESET”.

1. Display at the Aging Mode

Display operating state of CD section and tape deck section alternately. If an error occurred, stop display which that section.

2. CD Section

The sequence during the aging mode is following as below. Display at the aging mode is the same as the normal operation.

Aging mode sequence (CD section) :

3. Tape Deck Section

The sequence during the aging mode is following as below. If an error occurred, stop display that step.

Aging mode sequence (tape deck section) :

Rewind the tape A and B

“AAG-1 or 2”

Shut off

FWD play the tape A

“AAG-3”

2 minutes

Fast forward the tape A

“AAG-4”

Shut off or 20 seconds

REV play the tape A

“AAG-5”

2 minutes

Rewind the tape A

“AAG-6”

Shut off

FWD play the tape B

“BAG-3”

Start (from disc 1)

Disc chucking

TOC read

Play first track for 2 seconds

Play last track for 2 seconds

EX-change open/close

Open the disc tray

Disc skip

Close the tray

Change the next disc.

2 minutes

Fast forward the tape B

“BAG-4”

Shut off or 20 seconds

REV play the tape B

“BAG-5”

2 minutes

Rewind the tape B

“BAG-6”

Shut off

Note: “*AG-*” is display of each step.

19

CX-JT7

[GC TEST MODE]

• This mode is used to check the fluorescent indicator tube, LED and key.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously.

3. Fluorescent indicator tube and LEDs are all turned ON.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed over.

5. In the key check mode, press each key, the def ined ke y number

of every each key list is displayed on the fluorescent indicator tube.

6. In the key count check mode, “K-CNT 0” is displayed on the

fluorescent indicator tube. Each time a key is pressed, “K” value increases. However, once a key is pressed, it is no longer taken into account.

7. In the headphone input check mode, connect the headphone,

the message “H_P ON” is displayed on the fluorescent indicator tube, and disconnect the headphone, the message “H_P OFF” is displayed on the fluorescent indicator tube.

8. In the volume check mode, turn the [VOLUME] knob, the

display on the fluorescent indicator tube is changed over to “VOL UP”, “VOL FLAT” or “VOL DOWN”

[MC TEST MODE]

•This mode is used to check operations of Amplifier.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 3]

simultaneously.

3. When the MC test mode is activated, the message “MC MODE”

is displayed on the fluorescent indicator tube momentarily, then VACS level is displayed on the fluorescent indicator tube.

4. Press the

indicator tube is changed over to “EQ MAX”, press the

[TECHNO] key, the display on the fluorescent

[MANUAL] key, the display on the fluorescent indicator tube is

changed over to “EQ MID”, press the [HIP POP] key, the display on the fluorescent indicator tube is changed over to “EQ MIN”,

5. Turn the [VOLUME] knob, the display on the fluorescent

indicator tube is changed over to “VOL MAX”, “VOL MID” or “VOL MIN”

6. Press the [ENTER] key, VACS ON/OFF is changed over.

7. When the [REC PAUSE/START] key is pressed with a tape set

in the deck-B, the function is switched “MD” or “VIDEO” and recording starts. When the m or M key is pressed during recording, the tape is rewound back to the beginning of recording, the function is switched to “T APE B”, then playback starts.

8. When the [CD SYNC] key is pressed with the test tape (AMS-

100, AMS-110A) in the deck, number of space between tunes is counted, then if AMS-110A is set, “OK” is displayed on the fluorescent indicator tube and if AMS-100 is set, “NG” is displayed on the fluorescent indicator tube.

9. To release from this mode, press the [POWER] key.

[MODEL, DESTINATION AND VERSION DISPLAY]

• This mode is used to check the model, destination and software version.

Procedure:

1. Set to the standby state.

2. Press three keys of x , [TECHNO] and [HEAVY] simultaneously.

3. When the model, destination and version display mode is

activated, the model an destination is displayed on the fluorescent indicator tube.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed ov er to model and destination display mode and version display mode.

5. In the version display mode, press the [DISC DIRECT PLAY 3]

key, display is changed over to version display and year, month and day of the software creation display.

6. To release from this mode, press the two keys of [TECHNO]

and [HEAVY] simultaneously.

[CD ERROR CODE DISPLAY]

• This mode can be used for error display of CD section.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 1]

simultaneously.

Note: Error code is not displayed on the liquid crystal display.

[CD SERVICE MODE]

•This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the optical pick-up.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the

3. Press three keys of x , [HEAVY] and Z simultaneously.

4. When the CD service mode is activated, the message “TRVS

ON” is displayed on the fluorescent indicator tube.

5. Press the M key, optical pick-up move to outside track and

the message “SLED OUT” is displayed on the fluorescent indicator tube.

6. Press the m key, optical pick-up move to inside track and

the message “SLED IN” is displayed on the fluorescent indicator tube..

7. Press the [TECHNO] key, traverse ON/OFF is changed over.

[CD] key to select “CD”.

[5 REPEAT LIMIT CANCEL]

• Number of repeat for CD playback is 5 times when the repeat mode is “REPEAT”. This mode is used to enables CD to repeat playback for limitless times.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press three keys of x , [HEAVY] and Y simultaneously.

20

p

SECTION 5

ELECTRICAL ADJUSTMENTS

CX-JT7

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) –

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 (VC)

TP (RF)

TP (FE)

IC721

2121

CX-JT7

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – CD Section –

A

DETECTOR

A

D

C

B

E

F

LASER DIODE

PD

D

C

I-V AMP

B

E

F

LD

PD

AUTOMATIC

POWER CONTROL

Q701

RF AMP, FOCUS/TRACKING ERROR AMP,

DIGITAL SIGNAL PROCESSOR, DIGIRAL SERVO PROCESSOR,

FIN2

8

RF

PH, BH

A/D

CONVERTER

SERVO

PROCESSOR

D/A

CONVERTER

4

APC

TBAL

EQ,

AGC

RF AMP

FIN1

7

TIN1

9

TIN2

10

LDD

80

LDS

79

EFMIN

3

DIGITAL FILTER, D/A CONVERTER

ERROR

CORRECT

IC721

D/A

CONVERTER

EXTERNAL

AUDIO IN

SERIAL OUT

CLOCK

GENERATOR

LCHO

RCHO

ASDFIN ASDACK ASLRCK

DATA

DATACK

LRSY

EFLG

C2F

FSX/16MIN

16MOUT

XIN

XOUT

42

45

57 56 55

60 59 58

53 52 50

26MP3RES

54

49

48

16.9344MHz

X701

R-CH

2 ADDATA 3 ADBCK 4 ADLRCK

79 DATAIN 80 DATACK

1 LRSY

5 C2FIN 9 CKOUT

78 RESB

7 CKIN

73 CMDOUT 74 CMDIN 75 CL

MP3 DECODER

IC801

CE

76 66

MDATA0

– MDATA15

MADRS0

– MADRS8

FSYNC

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

• SIGNAL PATH

: CD PLAY

IC802

MEMORY

2-5, 7-10,

I/01 – I/016

23-30, 33-4060-53, 50

31-34, 36-39

A0 – A8

16-19, 22-26

27 OE45OEB 13 WE42WEB 14 RAS41RASB 29 LCAS43CASLB 28 UCAS44CASUB

MUTING

Q311

R-CH

MUTING CONTROL

SWITCH

Q312

CD-L

A

(Page 24)

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

2-AXIS DEVICE

(FOCUS)

(TRACKING)

S701

(LIMIT)

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

IC722

VO3(+)

18 17 VO3(–)

11 VO2(+) 12 VO2(–)

FOIN

20TIN

10

70 LIMIT SW

TDO

FDO23SLDO22SPDO25CONT4

20

21

COMMAND INTERFACE

*WRQ

72CD MUTE

106

DO

64

DI

63

CL

62

CE

61 65

67DRF 66*RES

99 I-LC78646/LC78684 DI 98 O-LC78646/LC78684 DO

100 O-LC78646/LC78684 CLK

5 O-LC78646 CE

85 I-WRQ

86 I-CD DRF

4 O-LC78646 RESET

SYSTEM CONTROLLER

IC901 (1/2)

M751

(LOADING)

M

O-LC78684 CE

I-LC78684 SYNC

I-BU IP DOWN/

CD OPEN CLOSE

LOADING MOTOR DRIVE

IC701

4 OUT1

2 OUT2

1O-SYS-MUTE 94O-POWER RELAY 29I-HOLD

11RESET 27I-POWER DOWN

96I-CD NUMBER SENS

22

7FIN

9RIN

S-MUTE

O-POWER

HOLD

RESET

POWER DOWN

LEVEL SHIFT

Q731

+

LM-F

LM-R

OPEN

CLOSE

ROTARY

ENCODER

S711

TABLE ADDRESS

S-MUTE,

O-POWER, HOLD

POWER DOWN

SENSOR

IC731

DISC TRAY

ADDRESS DETECT

S751

OPEN/CLOSE

DETECT

LM-F, LM-R,

TM-F, TM-R

RESET,

B

C

D

(Page 24)

(Page 23)

M701

(SLED)

M702

(SPINDLE)

M

26 VO4(+)

27 VO4(–)

2 VO1(+)

1 VO1(–)

25SLIN

M741

M

(TABLE)

3SPIN

7LDS

TABLE MOTOR DRIVE

IC712

4 OUT1

2 OUT2

TM-F

7FIN

TM-R

9RIN

2222

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

L-CH

HP1 (PB)

(DECK-A)

HRPE1

(REC/PB/ERASE)

(DECK-B)

FM 75Ω

(COAXIAL)

AM LOOP

(Page 24)

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

• SIGNAL PATH

R-CH R-CH

L-CH

R-CH R-CH

ERASE

ANTENNA

MIC, SA

E

HP

F

: TUNER (FM/AM)

: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: REC

R-CH

TUNER UNIT

FM ANT

AM ANT

MIC

SA

MUTING

Q219, 221

L-CH

R-CH R-CH

DI

DO

CLK

CE

TUNED

ST

TU-MUTE

RDS DATA

RDS INT

SPEANA AMP

Q201, 202

(FRONT PANEL KEY)

+3.3V (SUB)

VOLUME

BASS

MULTI JOG

TREBLE MIDDLE

S301 – 309,

S311 – 331

REC ON/OFF

SWITCH

Q222, 225

BAND-PASS

FILTER

Q204 – 206

REMOTE CONTROL

RECEIVER

IC802

ROTARY

ENCODER

S801

ROTARY

ENCODER

S802

ROTARY

ENCODER

S803

ROTARY

ENCODER

S804

KEY ACTIVE

SWITCH

Q504, 505

BIAS OSC

L201

DI

CLK

+4V

REC BIAS

SWITCH

Q228

BIAS OSC

Q223

SYSTEM CONTROLLER

IC901 (2/2)

91 O-LC72121/M61529/BU2099 DO 87 I-LC72121 DI 92 O-LC72121/BU2099 CLK

9 O-LC72121 CE 88 I-TUNER TUNE 97 I-TUNER STEREO

(AEP, UK)

2 I-BU1924 DI

3 I-BU1924 CLK

(Except AEP, UK, CIS)

21 I-MIC/I-TU SIG

18 I-SPEANA L 19 I-SPEANA M 20 I-SPEANA H

76 I-HP MUTE

28 I-RMC

84 I-VOL A 83 I-VOL B

80 I-BASS A 79 I-BASS B

82 I-JOG A 81 I-JOG B

78 I-TRE A 77 I-TRE B

I-KEY1 –

I-KEY3

26 – 24

+9V

O-BU2099 LCK

O-M61529 CLK

O-KEYSCAN

S7/I-A-PHOTO

S8/I-A-HALF

S6/I-A-MODE S9/I-B-MODE

I-REC (FWD)

S10/I-REC (REW)

DECK A/B SELECT SWITCH, REC/PB EQ AMP

IC201 (SUFFIX-11) IC201 (SUFFIX-13)

AIN (L)

32

BIN (L)

34

RECOUT (L)

8

7

1312XT2

15

16

93O-POWER LED

95

48 52 49 53 47 54 50 55

S10/U11

41 – 45, 56 – 6830 – 40

S7/U5

S8/U6

S6/U4

S9/U10

EQ

X901

32.768kHz

X902

8.64MHz

U8

U9

U7

21

XT1

CF1

CF2

I-B-PHOTO

I-B-HALF

S1 – S5,

S11 – S23

G1 – G11

EQOUT (L)

REC-IN (L)

MUTE-ON/OFF

REC MUTE-ON/OFF

LED901

POWER 1 STANDBY/ON

B+

D603 – 610

S6 – S10

FLUORESCENT

INDICATOR TUBE

28 27

24

13

A/B

14 15

B+ SWITCH

Q921

FL902

MUTE

TAI (L)

MULTI CONTROLLER

IC309 (SUFFIX-11) IC309 (SUFFIX-13)

8

A/B

PB MUTE

9

10

REC MUTE

FRONT SPON/OFF

LM-L (CD) LM-R (CD) TM-L (CD)

CLK

LCK

TM-R (CD)

S-OUT

LED201

CD

LED202

TUNER BAND

LED203

MD (VIDEO)

LED204

TAPE A/B

LED301

1

LED302

2

LED303

3

LED213

i-BASS

7 BIAS

6 REC

11 TUNER MUTE

DI

MCLK

+3.3V

DISC DIRECT PLAY

PB-OUT (L)

16

13 12 15 14

3DATA 4CLOCK 5LCK

18SO

CX-JT7

26

LM-F

LM-R

TM-F

TM-R

SO

LCK

CLK

S-OUT

3 DATA 4 CLOCK 5 LCK

18 SO

6CD

7 TUNER

8 AUX

9 TAPE

LED DRIVER

IC201

3 DATA 4 CLOCK 5 LCK

18 SO

6 CD1

7 CD2

8 CD3

9 I-BASS

TAPE MECHANISM CONTROLLER

MOTOR

A-SOL

B-SOL

LED DRIVER,

IC202

TAPE-L

REC-L

15MANUAL

14HIP POP

13TECHNO

12SALSA

11VOCAL

10HEAVY

10

11

12

LED211

MANUAL

LED210

HIP POP

LED208

TECHNO

LED207

SALSA

LED206

VOCAL

LED205

HEAVY

CAPSTAN/REEL

MOTOR DRIVE

Q601

PLUNGER DRIVE

(DECK-A)

Q602

PLUNGER DRIVE

(DECK-B)

Q603

U5 U8 U6 U9 U4 U10 U7 U11

TAPE-L, REC-L

SP-F

LM-F, LM-R, TM-F, TM-R

TUNER-L

DI, SO, CLK, MCLK, LCK,

TAPE MECHANISM

DECK BLOCK

CAPM+

MM

(CAPSTAN/REEL)

A-SOL

(DECK-A)

B-SOL

(DECK-B)

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

G

H

D

J

K

(Page 24)

(Page 22)

(Page 24)

2323

CX-JT7

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

(Except AEP, UK, CIS)

J401

MIC

MD (VIDEO)

(Page 22)

(Page 23)

L

IN

R

A

J

G

MIC LEVEL

AGC

Q401

MIC AMP

IC401 (1/2)

JK302

R-CH

CD-L

TUNER-L

TAPE-L, REC-L TAPE-L

REC-L

VR401

MIC MIXING

MIC AMP

IC401 (2/2)

MIC

2

MD-L

37

CD-L

40

TUNER-L

39

TAPE-L

38

D401

35

MIC

D402

INPUT SELECTSWITCH, TONE CONTROL, ELECTRICAL VOLUME, BASS BOOST AMP

IC301 (SUFFIX-11) IC301 (SUFFIX-13)

29

TOUT

RECB-2

28

VOLIN2

SA

19

DATA22CLOCK

21

MCLK

DI

SAOUT

OUT2

MIC, SA

SWITCHING

Q18

R-CH

SWITCHING

Q17, 19, 22

VM+10V

CENTER VOLATAGE

GENERATOR

Q324

IC304 (SUFFIX-11) IC304 (SUFFIX-13)

25

BUFFER

IC304

MUTING

Q525

PRE DRIVE

Q517, 519

R-CH

CURRENT

MIRROR

Q521, 523

CASCADE

Q511, 513, 515

R-CH

BIAS

Q507, 509

OVER CURRENT

DETECT

Q13

–VP

+VP

FINAL DRIVE

Q501, 503

OVER LOAD

R-CH

DETECT

Q505

+

HOLD

Q12

R-CH

+VH

+VL

–VH

–VL

DC DETECT

OUTPUT LEVEL

DETECT Q20, 21

OUTPUT LEVEL

DETECT Q23, 24

+

Q5, 6

+

THERMAL DETECT

Q10, 11

R-CH

+

R-CH

+

TH501,

502

FAN MOTOR

ON/OFF SWITCH

Q327, 328, 372, 373

R-CH

RY501

SPEAKER ON/OFF

RELAY DRIVE

Q304

M

R-CH

M731 (FAN)

SP-F

HP

E

F

J221

PHONES

JK502

SPEAKER

+ –

H

(Page 23)

L

R

(Page 23)

(Page 22)

DI, SO, CLK, MCLK, LCK

K

RESET, POWER DOWN

C

RESET

POWER DOWN

1

INA

FREQUENCY

CONTROL

Q314 – 316

12 – 10

CTRL1 –

CTRL3

RESET SWITCH

Q901

BASS BOOST ENHANCER

IC303 (SUFFIX-11) IC303 (SUFFIX-13)

VREF

14

BASS BOOST CONTROLLER

IC310 (SUFFIX-11) IC310 (SUFFIX-13)

BBE

7

BASS BOOST

ON/OFF SWITCH

Q323

9

I-BASS

DATA4CLOCK

LCK

3

5

LCK

CLK

SO

RESET SIGNAL

GENERATOR

IC502

+3.3V (SUB)

OUTA

GIN

13

BASS BOOST

CONTROL

Q317 – 320

16 – 13

BB CTRL1 –

BB CTRL4

D504

6

BASS BOOST

+4V

CONTROL

Q492

+4V

REGULATOR

IC501

EVER+10V

FEED BACK

SWITCH

Q491

RECT

D902 – 905

R-CH

+

+1.8V

O-POWER

(MP3)

VCC

SUB POWER

TRANSFORMER

PT902

MUTING CONTROL

SWITCH

Q527

S-MUTE

+3.3V (MAIN)

+1.8V

REGULATOR

IC803

DECK+9V, M+9V

B+ SWITCH

Q301, 302

FLUORESCENT

INDICATOR TUBE

POWER OFF

MUTING DRIVER

Q529, 530

IC306 (SUFFIX-11) IC306 (SUFFIX-13)

REGULATOR

D313 – 315

P+7V

D102

VM+9V

VM+10V

VF1

TO

VF2

–VFL

D513

VM+10V

+4V

IC306

Q533 – 536 (Except AEP, UK, CIS)

Q534 – 536 (AEP, UK, CIS)

IC305 (SUFFIX-11) IC305 (SUFFIX-13)

IC308 (SUFFIX-11) IC308 (SUFFIX-13)

IC313 (SUFFIX-11) IC313 (SUFFIX-13)

+VH

–VH

TO

POWER AMP

BLOCK

–30V REGULATOR

REGULATOR

+VL

–VL

+9V

IC305

+9V

IC308

+10V

IC313

HOLD

Q7 – 9

+

HOLD

RELAY B++9V

RECT

D301 – 304

RECT

D319 – 322

RECT

D1 (Except AEP, UK, CIS)

D3 – 6 (AEP, UK, CIS)

RECT

D2

POWER ON/OFF

RELAY DRIVE

Q330, 331

O-POWER

MAIN POWER

TRANSFORMER

PT901

VM

VH

VL

(Chilean, Peruvian)

RY901

RY902

Except

Chilean, Peruvian

S-MUTE, O-POWER, HOLD

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

SIGNAL PATH

: TUNER (FM/AM)

: CD PLAY

: TAPE PLAY

: REC

: MD (VIDEO) IN

: MIC INPUT

(Chilean, Peruvian)

S901

AC VOLTAGE

VOLTAGE

SELECTOR

(AC IN)

Except

Chilean, Peruvian

B

(Page 22)

2424

CX-JT7

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.

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.

• 2 : nonflammable resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

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

• A : B+ Line.

• B : B– Line.

•Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM (): CD PLAY []: TAPE PLAY (DECK-A) { } : TAPE PLAY (DECK-B) 〈〈 〉〉 : REC

•Voltages are taken with a V OM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

•Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER (FM/AM) J : CD PLAY E : TAPE PLAY (DECK-A) d : TAPE PLAY (DECK-B) G : REC j : MD (VIDEO) IN N : MIC INPUT

•Abbreviation E51 : Chilean and Peluvian models MX : Mexican model

: Impossible to measure

∗

4

W or less unless otherwise

• Circuit Boards Location

MOTOR (LD) board

CD BUTTON board

PANEL board

HEADPHONE board

MICROPHONE board (MX, E51)

TRANSFORMER board

SENSOR board

SW board

BD board

MOTOR (TB) board

TUNER PACK

DRIVER board

MAIN board

POWER board

2525

CX-JT7

6-5. PRINTED WIRING BOARD – BD Board – • See page 25 for Circuit Boards Location. :Uses unleaded solder.

1 2 3 4 5 6 7 8 9 10 11

A

BD BOARD

(COMPONENT SIDE)

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

BD BOARD

(CONDUCTOR SIDE)

B

+

M

B

C

E

M702

(SPINDLE)

–

S701

(LIMIT IN)

+

C

D

E

F

FB806

FB805

FB803

FB804

R806 R807

IC801

IC802

C817

C860

R860

1-688-077-

11

(11)

TP

(FE)

TP

(VC)

TP

(TE)

TP

(RF)

IC721

IC722

R747 R746

7114 8

22 2815 21

34

IC803

M701

M

(SLED)

–

(SUFFIX-11)

A1

MAIN

BOARD

CN321

(Page 34)

A2

MAIN

BOARD

CN321

(Page 35)

(SUFFIX-13)

5

1-688-077-

11

(11)

• Semiconductor Location

Ref. No. Location

IC721 D-8 IC722 C-9 IC801 E-3 IC802 F-3 IC803 F-9

Q701 B-7

2626

6-6. SCHEMATIC DIAGRAM – BD Board – • See page 54 for IC Block Diagrams. • See page 54 for Waveforms.

CX-JT7

R732

0

R731

2.2k

C753

R707

10

C709

C746 C708 R729

100

0.1 0.1 12k

0.0047

6.3V

C704

47

6.3V

R727C703

1000.1

S701

R708C710 10k0.047

(RF)

TP

(VC)

TP

(FE)

TP

(TE)

TP

R738

6.8k

SLCO

SLCIST

EFMIN

RF

RFVDD

RFVSS

FIN1

FIN2

TIN1

TIN2

VREF

REF1

FE

TEC

TE

RFMON

JITTC

ADAVDD

ADAVSS

TDO

D D L

O

FD

0

R739

Q701

UP0411600SO

AUTOMATIC

POWER

C705

0.001

C723

100

6.3V

F

C

E

C

D

V

C

N

V

G

C

B

N

D

A

(LD)(PD)

CN708

16P

VC

VCC

E

D

A

B

C

F

GND

LD

VR

PD

F+

T-

T+

F-

100

R745

C714

0.1

C701

0.1

C702

100

6.3V

C706

0.1

CONTROL

(LIMIT IN)

C711

0.1

C712

47p

R702

15k

R703

R704

R705

R701

R706

C716

C715

C717

C718

C719

C720

15k

47k

0.0047

1

0.0047

100p

0.001

1 50V

R709

27k

R711

330

C713

0.1

C721

C744

1

R730

1.2k

T

S

D

FR

S

D

IS

LD

V

K

V

C P

S E

C

4

R

A

T

O

3

D

N

D

P

L

O

S

G

C

M

6.8k

0

R740

R741

47p

C754C742

47p0.1

C743

0.047

R725R726

680680

C741

0.1

R728

47k

2

1

TE

O

U

D

P

M _ D C

FOCUS/TRACKING ERROR AMP,

DIGITAL SIGNAL PROCESSOR,

DIGITAL SERVO PROCESSOR,

DIGITAL FILTER,D/A CONVERTER

LC78646E-E

6 T N O

G

T

/C

/F

C

K

C

EFE

B

S

D

RF AMP,

IC721

R760

100

5

S

W

T2

D

S

N

S

V

D

O

V

IT

C

IM L

I1

I2

Q

N

P

E

O

/* V

FS

M

C756

47p

I

F

S

O

Q

D

R

E

D

R

D

R

W

_

D

C

100

R718

R719

R716

R717

F

S

Q

O

R

E

R

D

R

W

*

I3

I4

I5

N

S

O

S

M

V

C722

0.1

I D

D D V

100

R720

CL

FSX/16MIN

T U O D

DATACK

ASDACK

ASLRCK

16MOUT

TEST

CE

ASDFIN

L

E

C

C _ D C

R721

R722

100

1k

1

C856

C823

47p

R823

100

R824

DATA

LRSY

EFLG

C2F

XVSS

XIN

XOUT

XVDD

RVDD

RCHO

RVSS

LVSS

LCHO

LVDD

C824

100

47p

FB808

R829

C731

100

0.1

R713

FB701

0.01

C733

0.01

C732

C729

220 10V

R747

33

R746

33

R825

100

R826

R827

R828

C830

C829

FB807

1M 15p

R765 C734

1k

16.9344MHz

R715 100

R714 100

C825

47p

100

22p

47p

C831

22p

X701

18p

C735

FB801

FB802

C811

0.1

C812

C810

1

0.1 R818

150

R817

3.3k

R819R820

1k1k

C816

0.1 C814

100

6.3V

C815

220 10V

C813

0.1

C837

0.1

DATACK

LRSY

ADDATA

ADBCK

ADLRCK

C2FIN

TEST1

CKIN

VSS

CKOUT

TEST2

DVDD1

PW

SBSY

SFSY

SBCK

AVDD

VPRFR

VCOC

VPDO

AVSS

DVDD2

E C _ 3 P

M

R834

100

C844

0.1

B

IN

S

A

E

T

R

A D

0 A T A

S

D

S V

M

1

I/O

C807

C802

100

0.1

6.3V

C804

22p

C859

22p

C858

22p

C857

22p

R833 R832

100 2.2k

E

L

T

K

IN

C

TB IN

1

2

A

T

A

D

M

3

2

I/O

VF

C

U

O

D

O

T

O

M

D

C

CN

M C

MP3 DECODER

IC801

LC78684E-E

3 A

A4

A6 T A D

M

4

I/O

A7

T

TA5

T

A

D

M

8

7

6

5

I/O

C

YN S F

R860

100

C860 100p

F

6

K

S

C

AT

D

S

O

RC

V

W

3 D

VD

SS V

D

YN

T

C

V

S

FS

D

0

1 8 A

A9

A1

A1 T

T

T A

A

A D

D

D M

M

2

1

0

1

9

I/O

TCK S

2

TA1 A D

M

3 1

I/O

+1.8V REGULATOR

S

Q E

S

V TR S

MADRS10

MADRS11

MADRS12

3

4

A1 TA1

T A

A D

D M

M

5

4

1

I/O

IC803

MM1571J

VIN

GND

CONT

C843

DVDD5

MADRS0

MADRS1

MADRS2

MADRS3

MADRS4

MADRS5

MADRS6

MADRS7

DVDD4

MADRS8

MADRS9

CASUB

CASLB

RASB

MDATA15

6 1

I/O

VO

NOISE

C806

0.1

C805

C803

100

0.01

6.3V

0.1

A0

A1

A2

A3

A4

A5

A6

0.1

A7

VSS

OEB

WEB

C817

A8

OE

UCAS

LCAS

WE

RAS

M701

(SLED)

M702

(SPINDLE)

C707

100

6.3V

SLED/SPINDLE

MOTOR DRIVE,

FOCUS/TRACKING

COIL DRIVE

IC722

BA5836FP

6

5

4

3

2

1

C835

0.1

C834

220 10V

)

4

S

D

(-)

N

4

G

VO

)

1(+

1(-)

O

V

C

IN

C

(+

IN

L

IA

4

V

S

B

O V

T U

T

O

-B

E

IN

ES

EG

P S

R

)

3

C C

IN

TIN

V

TE

D

2

U

N

M

G

IN

R744 100k

P

(-)

ET

(+

O

3(-)

3

IN

ES

O

V

R

V

T

)

IN

N

P

O

G

FO

O

V

FB707FB708

FB804

C748

C747

220

0.1 10V

U

(-)

D

O

2

2(+

FB803

FB805

R807

100

R806

100

FB806

1

I/O

6

S

14

15

1

S V

I/O

3

2

1

C

I/O

VC

4

3

2

1

I/O

0

1

I/O

1

S

1

12

10

13

S V

I/O

7

6

4

5

C C

I/O

V

I/O

6

7

5

I/O

9

I/O

9

I/O

8

I/O

8

I/O

E

S

O

A

C

L

U

100

R805

R804

R803

C

S

A

N

C

LC

U

E

C

N

W

R801 R802

100 100

S

E

A

W

R

5

6

8 A

E O

AS R

4

7

A

CN710

CD_WRQ

MP3_CE

CD_RES

AMUTE

P+7.0V

CD_CE

FSYNC

A-GND

D.OUT

D-GND

P-GND

19P

DRF

DO

3.3V

R-CH

L-CH

3.3V

(SUFFIX-11)

CL

DI

A1

(Page 32)

A2

(Page 38)

(SUFFIX-13)

8

7

6

5

4

A

C N

0 A

S

A

S V

MEMORY

IC802

C

0

1

2

A

1

2

A

LC32V4265CT

3 A

VC

3 A

CD_CE

DRF

CD_WRQ

-25 FSYNC

MP3_CE

CL

DO

DI

CD_RES

The components identified by mark 0 or dotted line with mark 0 are critical for safety.

2727

Replace only with part number specified.

CX-JT7

6-7. PRINTED WIRING BOARDS – CHANGER Section – • See page 25 for Circuit Boards Location. :Uses unleaded solder.

SENSOR BOARD

IC731

CN731

13

CN741

1-687-132-

(11)

MOTOR (TB) BOARD

MOTOR (LD) BOARD

11

AK

EC

(TABLE)

M741

M

SW BOARD

CLOSE

OPEN

CN751

1 2

S751

OPEN/CLOSE

DETECT

1-687-669-

1-687-134-

CN742

11

(11)

11

(11)

DRIVER BOARD

Q731

R733

E

C737

R732

C736

CN705

2 1

CN702

C751

CN704

2

R734

R735

C735

R751

C741

JW710

R723

1

JW711

R722

CN703

C752

JW712

JW708

JW709

R721

D711

R701

D701

R702

4

JW707

C715

JW706

JW705

R713

(SUFFIX-11) (SUFFIX-13)

MAIN BOARD

B1

CN309

(Page 34) (Page 35)

CN701

19

R711

R712

19

JW713

B2

JW704

JW714

MAIN BOARD

CN309

JW702

JW703

IC712

IC701

C731

R731

JW701

1-687-135-

11

(11)

M751

(LOADING)

M

CN721

2 1

1-687-133-

S711

ROTARY ENCODER

DISC TRAY

ADDRESS DETECT

11

(11)

2828

Aiwa CXJT-7 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

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

case (top)

tray panel

CD mechanism deck (CDM74F-K6BD71A)

front panel section

mechanical deck

rear cabinet section

main board

power board

transformer board

table assy

motor (LD) board

base unit (BU-K6BD71A)

TEST MODE

ELECTRICAL ADJUSTMENTS

CD SECTION

DIAGRAMS

6-1. BLOCK DIAGRAM – CD Section –

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

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

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