Sony HCD-BX70DBI Schematic

HCD-BX70DBi

SERVICE MANUAL

Ver. 1.2 2009.02

• HCD-BX70DBi is the ampliﬁ er, CD player, tuner and iPod section in CMT-BX70DBi.

iPod is a trademark of Apple Inc., registered in the U.S. and other countries. MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer

IIS and Thomson. All other trademarks and registered trademarks are of their respective holders.

In this manual,

and®marks are not specified.

Amplifier section

DIN poweroutput (rated): 18 + 18 W (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference): 25 + 25 W (6 ohms at 1 kHz, 10% THD) Music power output (reference): 38 + 38 W (6 ohms at 1 kHz, 10% THD)

Inputs

AUDIO IN (stereo mini jack):voltage 250 mV, impedance 47 kilohms

Outputs

PHONES (stereo mini jack): accepts headphones of 8 ohms or more SPEAKER: accepts impedance of 6 to 16 ohms

CD player section

System: Compact disc and digital audio system Laser Diode Properties

Emission Duration: Continuous Laser Output*:Less than 44.6μW

This output is the value measurement at a distance of 200mm from the

objective lens surface on the Optical Pick-up Block with 7mm aperture. Frequency response: 20 Hz – 20 kHz Signal-to-noise ratio: More than 90 dB Dynamic range: More than 90 dB

Tuner section

DAB tuner section:

Frequency range* Band-III: 174.928 (5A) – 239.200 (13F) MHz * For details, see “DAB frequency table” below. Antenna: FM/DAB lead antenna Antenna terminal: 75 ohms, F female

FM stereo, FM/AM superheterodyne tuner FM tuner section:

Tuning range: 87.5 – 108.0 MHz (50 kHz step) Antenna: FM/DAB lead antenna Antenna terminals: 75 ohms unbalanced Intermediatefrequency: 10.7 MHz

AM tuner section:

Tuning range:531 – 1,602 kHz (with 9 kHz tuning interval) Antenna: AM loop antenna, external antenna terminal Intermediatefrequency: 450 kHz

SPECIFICATIONS

AEP Model

UK Model

Model Name Using Similar Mechanism HCD-EC68 Base Unit Name BU-K6BD90-WOD Optical Pick-up Block Name KSM-213DCP

DAB frequency table (Band-III)

Frequency Label Frequency Label

174.928 MHz 5A 209.936 MHz 10A

176.640 MHz 5B 211.648 MHz 10B

178.352 MHz 5C 213.360 MHz 10C

180.064 MHz 5D 215.072 MHz 10D

181.936 MHz 6A 216.928 MHz 11A

183.648 MHz 6B 218.640 MHz 11B

185.360 MHz 6C 220.352 MHz 11C

187.072 MHz 6D 222.064 MHz 11D

188.928 MHz 7A 223.936 MHz 12A

190.640 MHz 7B 225.648 MHz 12B

192.352 MHz 7C 227.360 MHz 12C

194.064 MHz 7D 229.072 MHz 12D

195.936 MHz 8A 230.784 MHz 13A

197.648 MHz 8B 232.496 MHz 13B

199.360 MHz 8C 234.208 MHz 13C

201.072 MHz 8D 235.776 MHz 13D

202.928 MHz 9A 237.488 MHz 13E

204.640 MHz 9B 239.200 MHz 13F

206.352 MHz 9C

208.064 MHz 9D

– Continued on next page –

9-889-139-03

2009B00-1

2009.02

COMPACT DISC RECEIVER

Sony Corporation

Audio&Video Business Group Published by Sony Techno Create Corporation

HCD-BX70DBi

iPod section

Compatible iPod models:

iPod nano 3rd

generation

iPod touch

iPod nano 2nd

generation

(aluminum)

iPod 4th

generation

(color display)

General

Power requirements:230 V AC, 50/60 Hz Power consumption: 63 watts Dimensions (w/h/d) (excl. speakers): Approx. 215 × 140 × 298 mm Mass (excl. speakers):

Design and specications are subject to change without notice.

(video)

iPod 5th

generation

(video)

iPod 4th

generation

Approx. 3.9 kg

iPod classic

iPod nano 1st

generation

iPod mini

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 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 speciﬁ ed herein may result in hazardous radia- tion exposure.

TABLE OF CONTENTS

1. SERVICING NOTES ............................................. 3

2. GENERAL .................................................................. 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 6

3-2. Panel (Side L/R) .............................................................. 7

3-3. Top Panel Block .............................................................. 7

3-4. TOP KEY Board, IP Board, Panel Top (IP) .................... 8

3-5. Front Panel Block ........................................................... 8

3-6. Rear Panel Block ............................................................ 9

3-7. Panel (Rear) .................................................................... 9

3-8. AMP Board Block ........................................................... 10

3-9. POWER Board Block ..................................................... 10

3-10. MAIN Board ................................................................... 11

3-11. DAB Board, Module (DAB Tuner) ................................ 11

3-12. Loading Mechanism Block ............................................. 12

3-13. Base Unit ......................................................................... 12

3-14. Belt .................................................................................. 13

3-15. OP Base Assy (KSM-213D) ........................................... 13

4. TEST MODE ............................................................ 14

5. ELECTRICAL CHECKS ...................................... 16

6. DIAGRAMS

6-1. Block Diagram - CD SERVO Section - .......................... 17

6-2. Block Diagram - iPod, TUNER, DAB Section - ............ 18

6-3. Block Diagram - MAIN Section - ................................... 19

6-4. Block Diagram

- PANEL, POWER SUPPLY Section - ........................... 20

6-5. Printed Wiring Boards - CD Section - ............................ 22

6-6. Schematic Diagram - CD Board - ................................... 23

6-7. Printed Wiring Board - DAB Board - ............................. 24

6-8. Schematic Diagram - DAB Board - ................................ 25

6-9. Printed Wiring Board - IP Board - .................................. 26

6-10. Schematic Diagram - IP Board - ..................................... 27

6-11. Printed Wiring Boards - MAIN Section - ....................... 28

6-12. Schematic Diagram - MAIN Section (1/3) - ................... 29

6-13. Schematic Diagram - MAIN Section (2/3) - ................... 30

6-14. Schematic Diagram - MAIN Section (3/3) - ................... 31

6-15. Printed Wiring Boards

- AMP/HEADPHONE Section - ..................................... 32

6-16. Schematic Diagram - AMP/HEADPHONE Section - .... 33

6-17. Printed Wiring Boards - PANEL Section - ..................... 34

6-18. Schematic Diagram - PANEL Section - .......................... 35

6-19. Printed Wiring Board - POWER Board - ........................ 36

6-20. Schematic Diagram - POWER Board - .......................... 37

This appliance is classiﬁ ed as a CLASS 1 LASER product. This marking is located on the rear or bottom exterior.

SAFETY-RELATED COMPONET 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.

7. EXPLODED VIEWS

7-1. Panel Sectiom ................................................................. 45

7-2. Top Panel Section ........................................................... 46

7-3. Front Panel Section ......................................................... 47

7-4. MAIN Board Section ...................................................... 48

7-5. POWER Board Section ................................................... 49

7-6. Loading Mechanism Section .......................................... 50

7-7. Base Unit Section (BU-K6BD90-WOD) ........................ 51

8. ELECTRICAL PARTS LIST .............................. 52

SECTION 1

SERVICING NOTES

HCD-BX70DBi

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 ﬂ exible 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 reﬂ ective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

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)

: 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 viscous (sticky, less prone to ﬂ ow)

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.

ANTITHEFT UNLOCK MODE

Procedure:

1. Press the [

2. Press the [FUNCTION] button to select “CD”.

3. Press two buttons of [

4. The message “UNLOCKED” is displayed on the ﬂ uorescent indicator tube and the disc tray is unlocked.

] button to turn the power on.

?/1

x/CANCEL

] and [

] for 5 seconds.

Note: When “LOCKED” is displayed, the tray lock is not released by

turning power on/off with the [?/1] button.

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

Note: Please insert a screwdriver after removing the panel (side L).

About disassembly of the panel (side L), please refer to “3-2. Panel (Side L/R)” (page 7).

Open the tray.



Insert the driver.



Push the boss.



HCD-BX70DBi

Basic Operations

is manual mainly explains operations using the remote, but the same operations can also be performed using the buttons on the unit having the same or similar names.

Before using the system

To use the remote

Slide and remove the battery compartment lid , and insert the two supplied R6 (size AA) batteries,  side rst, matching the polarities shown below.

Notes on using the remote

With normal use, the batteries should last for about six months. Do not mix an old battery with a new one or mix dierent types of

batteries.

If you do not use the remote for a long period of time, remove the

batteries to avoid damage from battery leakage and corrosion.

To set the clock

Use buttons on the remote to set the clock.

1 Turn on the system.

Press  (power)

2 Select the clock set mode.

Press TIMER MENU on the display, press / “CLOCK SET?” and then press

3 Set the time.

Press / press minutes. e clock settings are lost when you disconnect the power cord or if a power failure occurs. To display the clock when the system is o, press DISPLAY seconds.

To run the DAB Automatic Scan

When you turn on the system for the rst time aer you purchase the system, DAB Automatic Scan starts automatically and creates a list of available services. If you want to run the DAB Automatic Scan again, perform the procedure below.

1 Press DAB AUTO SCAN

“Auto Scan?” and “Push Enter” appear.

2 Press (enter)

Scanning begins. “” appears. Depending on the DAB services available in your area, scanning may take a few minutes.

When scanning is complete, a list of available services is created.





. If the current mode appears



repeatedly to select



(enter) .



repeatedly to set the hour, and then



(enter) . Use the same procedure to set the



. e clock is displayed for about 8



on the unit.



SECTION 2

GENERAL

Notes

If your country or region does not support DAB broadcast, “No

Service” appears.

Do not press any button on the unit or the remote during DAB

Automatic Scan. If scanning is interrupted, run the DAB Automatic Scan again.

If you move to another area, repeat this procedure to store the

stations for your new area.

is procedure clears all previously stored presets. Before unplugging the DAB antenna, make sure the system is turned

o to preserve your own DAB settings.

is tuner does not support data services.

To use the iPod

Insert an iPod Dock Adapter into the unit’s connector before use. For details on the supplied iPod Dock Adapters, refer to the instructions supplied with the Dock Adapters.

To remove the iPod Dock Adapter, pull it up with your ngernail or a at object using the slot inside the adapter.

Adjusting the sound

To adjust the volume

Press VOLUME +/ (or VOL +/ on the unit) .

To add a sound eect

To Pr es s

Generate a more dynamic sound (Dynamic Sound Generator X-tra) Set the sound eect

Playing a CD/MP3 disc

1 Select the CD function.

Press FUNCTION +/ (or FUNCTION on the unit)



repeatedly.

2 Place a disc.

Press  (open/close) with the label side up on the disc tray.

To close the disc tray, press  (open/close)  on the unit. Do not force the disc tray closed with your nger, as this may damage the unit.

3 Start playback.

Press  (play) (or CD  (play/pause) on the



unit)

To Press

Pause playb ack

Stop playback

Select a folder on an MP3 disc Select a track or le

Find a point in a track or le

Select Repeat Play

To change the play mode

Press PLAY MODE  repeatedly while stopped. You can select normal play (“ les in the folder on the disc), shue play (“SHUF” or

SHUF*”), or program play (“PGM”).

“

* When playing a CD-DA disc, (SHUF) Play performs the same

operation as normal (shue) play.

Notes on Repeat Play

All tracks or les on a disc are played repeatedly up to ve times. “REP1” indicates that a single track or le is repeated until you stop

it.

Slot



on the unit.

DSGX



repeatedly to select

EQ “BASS” or “TREBLE,” and then press +/ to adjust the level.



 (pause) (or CD  (play/

pause) on the unit) To resume play, press the button again.

 (stop) (or /CANCEL on the unit)

+/ (select folder) .

/



Hold down / (rewind/ fast forward) and release the button at the desired point.

REPEAT “REP” or “REP1” appears.



repeatedly

on the unit, and place a disc





(go back/go forward)



during playback,



repeatedly until

the player is ”

for all MP3

Notes on playing MP3 discs

Do not save other types of tracks or les or unnecessary folders on a

disc that has MP3 les.

Folders that have no MP3 les are skipped. MP3 les are played back in the order that they are recorded onto

the disc.

e system can only play MP3 les that have a le extension of

“.MP3”.

If there are les on the disc that have the “.MP3” le extension,

but that are not MP3 les, the unit may produce noise or may malfunction.

e maximum number of:

folders is 255 (including the root folder). MP3 les is 511. 

MP3 les and folders that can be contained on a single disc is 512.



folder levels (the tree structure of les) is 8.

Compatibility with all MP3 encoding/writing soware, recording

device, and recording media cannot be guaranteed. Incompatible MP3 discs may produce noise or interrupted audio or may not play at all.

Notes on playing multisession discs

If the disc begins with a CD-DA (or MP3) session, it is recognized as

a CD-DA (or MP3) disc, and other sessions are not played back.

A disc with a mixed CD format is recognized as a CD-DA (audio)

disc.

Listening to the radio

Before you can receive DAB, you must complete the DAB Automatic Scan procedure (see “Before using the system”).

1 Select “ TUNER DAB,” “TUNER FM” or “TUNER AM.”

Press FUNCTION +/ (or FUNCTION on the unit)



repeatedly. You can also select DAB directly by

pressing DAB AUTO SCAN

2 Select the tuning mode.

Press TUNING MODE appears.

3 Tune in the desired station.

Press +/ (or TUNE +/ on the unit) stops automatically when a station is tuned in, and then “TUNED” and “STEREO” (for stereo programs only) appear.

When you tune in a DAB station or an FM station that provides RDS services, the service name or station name appears on the display.

To stop automatic scanning (FM/AM bands only)

Press  (stop) (or /CANCEL on the unit) .

To tune in a station with a weak signal (FM/AM bands only)

If “TUNED” does not appear and the scanning does not stop, press TUNING MODE and “PRESET” disappear, and then press +/ (or TUNE +/ on the unit) station.

To reduce static noise on a weak FM stereo station

Press FM MODE  repeatedly until “MONO” appears to turn o stereo reception.

Notes on listening to DAB stations

When tuning in a DAB station, it may take a few seconds before you

hear any sound.

Primary service is automatically received when secondary service

ends.



on the unit.



repeatedly until “AUTO”



repeatedly until “AUTO”



repeatedly to tune in the desired

Playing the iPod

1 Select the iPod function.

Press FUNCTION +/ (or FUNCTION on the unit)



repeatedly.

2 Place the iPod.

3 Start playback.

Press  (play) (or iPod  (play/pause) on the



unit)

To control the iPod

You can control your iPod with the following buttons on the remote or unit.

To Pr es s

Pause playb ack

Scroll up/down the iPod menus

Select a track or chapter of audiobook/podcast

Choose the selected item

 (pause) (or iPod  (play/pause) on the unit)



(stop)



. You can scroll up or

/

down the iPod menus much like the Click Wheel operations of the iPod or the drag up-or-down operations of the iPod touch.

(go back/go forward)

/



. To fast-forward or fast-

rewind, hold down the button.



/ (enter) (or ENTER on





the unit) selected item much like the center button on the iPod or the touch operation of the iPod touch.



. Scanning



or 

. You can choose the

This section is extracted from instruction manual.

To Press

Find a point in a track or chapter of audiobook/podcast

Return to the previous menu or select a menu

To use the system as a battery charger

You can use the system as a battery charger for the iPod when the system is both on and o. e charging begins when the iPod is placed on the unit’s



. e charging status appears in the iPod

connector display. For details, see the user’s guide of your iPod.

To stop charging the iPod

Remove the iPod. If you stop charging the iPod when the system is o, press DISPLAY disappears in the display.

Notes

When placing or removing the iPod, handle the iPod in the same

angle as that of the iPod connector or sway the iPod to prevent connector damage.

Do not carry the unit with an iPod set on the connector. Doing so

may cause a malfunction.

When placing or removing the iPod, brace the unit with one hand

and take care not to press the controls of the iPod by mistake.

Before disconnecting the iPod, pause playback. While playing video, you cannot use /

rewind (fast forward) by holding down /

To change the volume level, use VOLUME +/ (or VOL +/ on the



unit)

. e volume level does not change even if adjusted on the

iPod.

is system is designed for iPod only. You cannot connect any other

portable audio players.

To use an iPod, refer to the user’s guide of your iPod. Sony cannot accept responsibility in the event that data recorded to

iPod is lost or damaged when using an iPod with this unit.

(fast rewind/fast

/



during playback, and

forward) release the button at the desired point.



/TOOL MENU /



(return) . You can return to the previous menu or select a menu much like the Menu button on the iPod or the touch operation of the iPod touch.





on the unit and do not twist

until the clock



. You can fast









Changing the display

To Pr es s

Change information on the display Check the clock when the system

is o

For example, you can view CD/MP3 disc information, such as;

track or le number during normal play. track or le name (“ artist name (“ album or folder name (“ total playing time while the player is stopped.

You can also view DAB station information such as the service name, channel label, preset number, frequency, DLS (Dynamic Label Segment), or ensemble label.

e clock is displayed continuously while the iPod is being charged. To turn o the clock display, press DISPLAY charging the iPod”).

e STANDBY indicator  on the unit lights up when the system is o.

Notes on the display information

Characters that cannot be displayed appear as “_”. e following are not displayed:

total playing time for a CD-DA disc depending on the play mode. total playing time and remaining playing time for an MP3 disc.

e following are not displayed correctly:

folder and le names that do not follow either ISO9660 Level1,

Level 2 or Joliet in the expansion format.

e following is displayed:

ID3 tag information for MP3 les when ID3 version 1 and version

2 tags are used (up to 62 characters).

up to 8 characters of service name, up to 128 characters of DSL

(Dynamic Label Segment) and up to 16 characters of ensemble label.

DISPLAY  repeatedly when the system is on.

DISPLAY  when the system is

o seconds.

”) during normal play.

. e clock is displayed for 8

”) during normal play.



(See “To stop

Using optional audio components

To connect an optional headphones

Connect headphones to the PHONES jack  on the unit.

To connect an optional component

Connect additional audio component to the AUDIO



on the unit using an audio analog cord (not

IN jack supplied). Turn down the volume on the system, and then select the AUDIO IN function.

Other Operations

HCD-BX70DBi

Creating your own program (Program Play)

1 Press FUNCTION +/ (or FUNCTION on the unit)

repeatedly to select the CD function.

2 Press PLAY MODE

while the player is stopped.

3 Press /

track or le number appears.

When programming les, press to select the desired folder, and then select the desired le.

4 Press (or ENTER on the unit)

or le to the program.

“.” appears when the total program time exceeds 100 minutes for a CD, or when you select a CD track whose number is 21 or over, or when you select an MP3 le.

5 Repeat steps 3 through 4 to program additional

tracks or les, up to a total of 25 tracks or les.

6 To play your program of tracks or les, press  (or

CD  on the unit)

e program remains available until you open the disc tray. To play the same program again, press  (or CD  on the unit)

To cancel Program Play

Press PLAY MODE  repeatedly until “PGM” disappears while the player is stopped.

To delete the last track or le of the program

Press CLEAR  while the player is stopped.



repeatedly until “PGM” appears



repeatedly until the desired

Selected track or le number



+/ repeatedly

Total playing time of program (including selected track or le)



to add the track

Presetting radio stations

You can preset your favorite radio stations and tune them in instantly by selecting the corresponding preset number. Use buttons on the remote to preset stations.

1 Tune in the desired station (See “Listening to the

radio”).

2 Press TUNER MEMORY

3 Press +/

preset number.

If another station is already assigned to the selected preset number, the station is replaced by the new stations.

4 Press

5 Repeat steps 1 through 4 to store other stations.

You can preset up to 20 DAB, 20 FM and 10 AM stations. e preset stations are retained for about half a day even if you disconnect the power cord or if a power failure occurs.

6 To call up a preset radio station, press TUNING



MODE then press +/ preset number.

Note on presetting DAB stations

You can preset a DAB service only when it can be received.



Preset number



repeatedly to select your desired



repeatedly until “PRESET” appears, and



repeatedly to select the desired

Using the Timers

e system oers two timer functions. If you use the Play Timer with the Sleep Timer, the Sleep Timer has priority.



Use buttons on the remote to use the timer functions.

Sleep Timer:

You can fall asleep to music. is function works even if the clock is not set.



Press SLEEP system automatically turns o aer the current disc stops or in 100 minutes.

Play Timer:

You can wake up to CD, tuner or iPod at a preset time.

Make sure you have set the clock.

1 Prepare the sound source.

2 Press TIMER MENU

3 Press

4 Set the time to start playback.

5 Use the same procedure as in step 4 to set the time

6 Select the sound source.

7 Press 

To activate or check the timer again

1 Press TIMER MENU

2 Press

3 Press

To cancel the timer

Repeat the same procedure as above until “TIMER OFF?” appears in step 3, and then press

To change the setting

Start over from step 1.

Note on the iPod touch user

e Play Timer may not be activated depending on the status of the connected iPod touch.

Tip

e Play Timer setting remains as long as the setting is not canceled manually.

repeatedly. If you select “AUTO,” the

Prepare the sound source, and then press VOLUME



to adjust the volume.

+/ To start from a specic track or le, create your own program.

then press

“ON” appears, and the hour indication ashes.

Press / press

e minute indication ashes. Use the procedure above to set the minutes.

to stop playback.

Press / source appears, and then press shows the timer settings.

e system turns on 15 seconds before the preset time. If the system is on at the preset time, the Play Timer will not play.

“TIMER SEL?” ashes in the display.

press





repeatedly to select “PLAY SET?,” and

/





repeatedly to set the hour, and then







repeatedly until the desired sound





to turn o the system.







repeatedly to select “PLAY SEL?,” then

/



. e display



HCD-BX70DBi

DISASSEMBLY

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

3-1. DISASSEMBLY FLOW

SET

3-2. PANEL (SIDE L/R) (Page 7)

3-3. TOP PANEL BLOCK (Page 7)

SECTION 3

3-5. FRONT PANEL BLOCK (Page 8)

3-12. LOADING MECHANISM BLOCK (Page 12)

3-13. BASE UNIT (Page 12)

3-14. BELT (Page 13)

3-15. OP BASE ASSY (KSM-213D) (Page 13)

3-6. REAR PANEL BLOCK (Page 9)

3-8. AMP BOARD BLOCK (Page 10)

3-10. MAIN BOARD (Page 11)

3-4. TOP KEY BOARD, IP BOARD, PANEL TOP (IP) (Page 8)

3-9. POWER BOARD BLOCK (Page 10)

3-11. DAB BOARD, MODULE (DAB TUNER) (Page 11)

3-7. PANEL (REAR) (Page 9)

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

3-2. PANEL (SIDE L/R)

panel (side L)



two screws



(BVST3 × 6)

screw



(BVTP3 × 10)

HCD-BX70DBi

screw



(BVTP3 × 10)

panel (side R)



3-3. TOP PANEL BLOCK

screw



(BVTT3 × 6)



screw



(PWH3 × 6)

connector



(CN325)

connector



(CN322)

top panel block



two screws



(BVST3 × 6)

five screws



(BVTP3 × 10)

screw



(PWH3 × 6)

screw



(BVTT3 × 6)

HCD-BX70DBi

3-4. TOP KEY BOARD, IP BOARD, PANEL TOP (IP)

panel top (IP)

button (function)



button (function B)



button (tune)



button (enter)



connector

TOP KEY board



(CN101)

base (IP) assy

escutcheon

four screws

(BVTP2.6 )

four screws



(BVTP2.6)

3-5. FRONT PANEL BLOCK



(BVTP2.6)

screw



(BVTT3 × 6)

five screws

button



(VOL)

two screws



(PWH2.6 × 10)

IP board

four screws



(PTP2 × 5)

HOLD board



flexible flat cable (13 core)



(CN306)

front panel block

two screws



(BVST3 × 6)



3-6. REAR PANEL BLOCK

rear panel block



fan motor connector (CN313)



flexible flat cable (11 core)



(CN310)

two screws



(BVTP3 × 10)

three screws



(BVST3 × 6)

HCD-BX70DBi

3-7. PANEL (REAR)

D.C. fan



(M901)

panel (rear)



two screws



(BVTP3 × 16)

plate



(GND TU)



tuner (FM/AM)



two feet (felt)

two screws



(BVST3 × 6)



flexible flat cable (11 core)

HCD-BX70DBi

3-8. AMP BOARD BLOCK

flexible flat cable (7 core)



(AMP board: CN308/MAIN board: CN309)

two screws



(BV3)

AMP board block



connector (CN312)



connector (CN320)



3-9. POWER BOARD BLOCK

four screws



POWER board block



connector (CN904)



screw



(BV3)

coating clip



power cord connector (CN901)



3-10. MAIN BOARD

flexible flat cable (5P)



(CN311)

flexible flat cable (21 core)



(CN305)

two screws



(BVTT3 × 6)

flexible flat cable (11 core)



(CN326)

connector



(CN316)

connector



(CN904)

HCD-BX70DBi

MAIN board



3-11. DAB BOARD, MODULE (DAB TUNER)

two screws



(BVTP3 × 8)

DAB board



module (DAB tuner)



Remove two solders.





flexible flat cable



(DAB board: CN801/MAIN board: CN326)

connector pin 2P



DAB cable connector



HCD-BX70DBi

3-12. LOADING MECHANISM BLOCK

holder (CD)



three screws



(BV3)

loading mechanism block



door CD



two screws



(BVTP2.6)



3-13. BASE UNIT

flexible flat cable (5 core)



(CN001)

flexible flat cable (21 core)



(CN201)

 two floating screws

 two springs (insulator)

 insulator

 floating screw

 insulator

flexible flat cable (21 core)



(CN305)

flexible flat cable (5 core)



(CN311)

 insulator



 two floating screws

 two springs

(insulator)

 insulator

 base unit

loading (BK) assy

– Bottom view –

3-14. BELT

HCD-BX70DBi

position of belt

 belt

belt

 claw



 tray (AU)

3-15. OP BASE ASSY (KSM-213D)

 claw

 op base assy

(KSM-213D)

 Remove four solders.

 flexible flat cable (16 core)

(CN301)

 CD board

HCD-BX70DBi

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 three buttons of [x/CANCEL], [VOL +] and [?/1] simultaneously.

2. The system is reset and becomes standby states.

COMMON TEST MODE

This mode is used to check operations of ampliﬁ er.

Procedure:

1. Press the [

2. Press three buttons of [TUNER/BAND], [x/CANCEL] and [ENTER] simultaneously.

3. When the COMMON test mode is activated, “AUDIO IN” is displayed on the liquid crystal display and “cPLAY SLEEP” blink on the ﬂ uorescent indicator tube.

4. Each time [EQ] button on the remote commander is pressed, the display changes starting “TONE MAX”, “TONE MIN” and “TONE FLAT” this order.

5. Press the [VOL –] button, “VOLUME MIN” is displayed on the ﬂ uorescent indicator tube. Press the [VOL +] button, “VOLUME MAX” is displayed on the ﬂ uorescent indicator tube.

6. To release this mode, press the [

PANEL TEST MODE

This mode is used to check the liquid crystal display, LED, model, destination, software version and key.

Procedure:

1. Press the [?/1] button to turn the power on.

2. Press three buttons of [TUNER/BAND], [DSGX] and [ENTER] simultaneously.

3. All segments on the ﬂ uorescent indicator tube, [STANDBY] LED light up.

4. Press the [ENTER] button, the model and destination are alternately displayed on the ﬂ uorescent indicator tube.

5. Press the [ENTER] button again, MC version is displayed on the ﬂ uorescent indicator tube.

6. Each time [ENTER] button is pressed, the display changes starting from MC version, GC version, CLA version, CD version, CDD version, CDMA version, CDMB version, BDA version, BDB version, ST version, TA version and TM version this order, and returns to the MC version display.

7. When [x/CANCEL] button is pressed while the MC version is displayed, year, month and day of the software creation is displayed. When [x/CANCEL] button is pressed again, the display returns to the MC version display.

8. Press the [DSGX] button, the key test mode is activated and “K 0” is displayed on the ﬂ uorescent indicator tube.

9. Each time a button is pressed, “K” value increases. However, once a button is pressed, it is no longer taken into account.

All keys are pressed, display becomes “K19”.

10. Press the [VOL +] button, the key AD monitor mode is activated and “FFFFFF” is displayed on the ﬂ uorescent indicator tube.

11. Each time a button is pressed, the AD of each button is displayed on the ﬂ uorescent indicator tube.

12. To release this mode, press three buttons in the same manner as step 2, or disconnect the power cord.

] button to turn the power on.

?/1

] button.

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 [?/1] button to turn the power on.

2. Press the [FUNCTION] button to select “CD”.

3. Press three buttons of [DSGX], [VOL +] and [ ously.

4. After the “STANDBY” display blinks, “LOCK” is displayed on the ﬂ uorescent indicator tube, the ship mode is set.

CD SHIP MODE & MEMORY CLEAR

This mode is used to perform CD ship mode and cold reset simultaneously.

Procedure:

1. Press the [

2. Press three buttons of [ taneously.

3. After the “STANDBY” display blinks, “LOCK” is displayed on the ﬂ uorescent indicator tube the ship mode is set and the system is reset.

ANTITHEFT LOCK MODE

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

Procedure:

1. Press the [

2. Press the [

3. Press the [

4. Press the [FUNCTION] button to select “CD”.

5. Press two buttons of [x/CANCEL] and [A] for 5 seconds.

6. The message “LOCKED” is displayed on the ﬂ uorescent indi- cator tube and the disc tray is locked. (Even if pressing the Z button, the message “LOCKED” is displayed on the ﬂ uores- cent indicator tube and the disc tray is locked)

7. To release from this mode, press two buttons of [x/CANCEL] and [A] for 5 seconds.

8. The message “UNLOCKED” is displayed on the ﬂ uorescent indicator tube and the disc tray is unlocked.

CD POWER MANAGE

This mode is used to changed over CD power on/off for decreasing of reception noise in the tuner mode.

Procedure:

1. Press the [?/1] button to turn the power on.

2. Press the [FUNCTION] button to select “CD”.

3. Press the [?/1] button again to turn the power off.

4. Press two buttons of [x/CANCEL] and [?/1] simultaneously.

5. The message “CD POWER”, “ON” or “CD POWER”, “OFF”is displayed on the ﬂ uorescent indicator tube, and CD power on/ off is changed over in the tuner mode.

] button to turn the power on.

?/1

/CANCEL], [VOL +] and [A] simul-

] button to turn the set on.

?/1

] button to open the disc tray and set the CD disc.

] button to close the disc tray.

] simultane-

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 [?/1] button to turn the power on.

2. Press the [FUNCTION] button to select “CD”.

3. Press three buttons of [x/CANCEL], [VOL –] and [A] simultaneously, the message “SERVICE MO” is displayed on the ﬂ uorescent indicator tube.

4. Press the [l m TUNE –] button to move the optical pickup to inside track and the message “SLED IN” is displayed on the ﬂ uorescent indicator tube, or press the [M L TUNE +] button to outside track and the message “SLED OUT” is displayed on the ﬂ uorescent indicator tube.

5. Press the [CD u] button, “LD ON” or “LD OFF” is displayed on the ﬂ uorescent indicator tube. Each time [CD u] button is pressed, laser diode on/off is changed over.

6. To release this mode, press the [

?/1

] button.

HCD-BX70DBi

SECTION 5

ELECTRICAL CHECKS

TUNER SECTION CD SECTION

FM TUNE LEVEL CHECK

signal

generator

set

Procedure:

1. Turn on the set.

2. Input the following signal from signal generator to FM antenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz Deviation : 75 kHz Modulation : 1 kHz ANT input : 35 dBu (EMF)

Note: Use 75 ohm coaxial cable to connect signal generator and the set.

You cannot use video cable for checking.

Use signal generator whose output impedance is 75 ohm.

3. Set to FM tuner function and tune A, B and C signals.

4. Conﬁ rm “TUNED” is lit on the display for A, B and C sig- nals.

When the selected station signal is received in good condition, “TUNED” is displayed.

Note:

1. CD Block is basically constructed to operate without adjustment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than speciﬁ ed value with the following checks.

5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

oscilloscope

(DC range)

CD board

TP121 (RFI) TP124 (VC)

+ –

Procedure:

1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the CD board.

2. Press the [

3. Set disc (YEDS-18) on the disc tray and press the [CD

] button to turn the power on.

?/1

button to playback.

4. Conﬁ rm that oscilloscope waveform is as shown in the ﬁ gure below. (eye pattern)

A good eye pattern means that the diamond shape (◊) in the

center of the waveform can be clearly distinguished.

VOLT/DIV: 200 mV TIME/DIV: 500 ns

]

Checking Location:

– CD Board (Conductor Side) –

TP124

(VC)

TP121

(RFI)

IC101

level:

1.2 ± 0.3 Vp-p

HCD-BX70DBi

1717

SECTION 6 DIAGRAMS

6-1. BLOCK DIAGRAM - CD SERVO Section -

SYSTEM CONTROLLER

IC301 (1/4)

CD-MP3 PROCESSOR

IC101

MUTE

2-AXIS

DEVICE

(TRACKING)(FOCUS)

AVDD +3.3V

DETECTOR

FNi1 (A)

RFo

97 FPi1 (B)

AGCi

3RFRP RFZI

76TEi TEZi

83RFEQo 81 RFi

82 RFRPi

30LO

27RO

38BUS0

R-CH

94 FNi2 (C)

96 FPi2 (D)

100 TNi (E)

98 TPi (F)

91 LDo 92MDi

2VO1+

1VO1–

13 DMo

AUTOMATIC

POWER CONTROL

Q301

LASER DIODE

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

12 FMo

10 TRO

9FMO

20 IO0 (/HSO)

I-V AMP

M401

(SPINDLE)

M402

(SLED)

12 VO2–

11 VO2+

18 VO3+

17 VO3–

26 VO4+

IN4’

IN3’

IN2’

IN1

BIAS

84 VRo

VO4–

FOCUS/TRACKING COIL DRIVE,

SLED/SPINDLE MOTOR DRIVE

IC401

S201

(LIMIT) DVDD +3.3V

X102

16.9344MHz 60 CD DRIVER MUTE

MOTOR DRIVE

IC311

CDM LOAD IN

CDM LOAD OUT

CDM SW (OPEN)

CDM SW (CLOSE)

88 87

CD-L

: CD PLAY

SIGNAL PATH

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

VCC

SP+

SP–

SL+

SL–

T+

T–

F+

F–

3 CD BUS0

39BUS1 2 CD BUS1

40BUS2 (SO) 1 CD BUS2

70 CD CLK

41BUS3 (SI)

100

CD BUS3

42BUCK (CLK)

69 CD CCE

43XCCE

54SBSY

48PIO0

68 MP3 IREQ

19 SBSY

37XRST

59 CD RESET

S001

DISC TRAY

OPEN/CLOSE DETECT

OPEN

M001

(LOADING)

(Page 19)

HCD-BX70DBi

1818

6-2. BLOCK DIAGRAM - iPod, TUNER, DAB Section -

37 AUDIO_MUTE

iPod INTERFACE

IC101

78 CLINK_RX_DIN

SYSTEM CONTROLLER

IC301 (2/4)

CN102

(iPod)

L-CH

R-CH

LINE-OUT-L

LINE-OUT-R

24 TXD_iPod

RXD

23 RXD_iPod

TXD

DGND

8 RESET

VBUS +5V

VBUS

iPod-L

MUTING

CONTROL

SWITCH

Q106

RESET SIGNAL

GENERATOR

IC103

MUTING

Q103, 105

TUNER-L

DAB-L

28TXD_DMPORT

77 CLINK_TX_DOUT29RXD_DMPORT

73 NC

DETECT

XOUT

XIN

X101

20MHz

TUNER (FM/AM)

FM ANT

AM ANT

L OUT

R OUT

DO/STEREO

R-CH

ST DIN

ST CLK

ST CE

FM 75 Ω COAXIAL

ANTENNA

26 DATA IN/STEREO

TUNED

6 TUNER TUNED

RDS CLK

18 RDS INT

RDS DATA

7 RDS DATA

28 ST DATA OUT 27 ST CLK 25

DAB TUNER MODULE

AUDL

AUDR

S1_DIN

R-CH

S1_DOUT

ANTENNA DAB 75 Ω

47 48

ST CE

DAB TXD DAB RXD

: TUNER (FM/AM)

SIGNAL PATH

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

: DAB

: AUDIO

D104

D102

LINE AMP

IC303

: iPod

LINE AMP

IC803

(Page 19)

HCD-BX70DBi

1919

6-3. BLOCK DIAGRAM - MAIN Section -

AUDIO IN

R-CH

J301

CD-L

DAB-L

TUNER-L

iPod-L

PROTECT

SDA25SCL

AMP DATA

AMP CLOCK

INH

SEL A

TA LINE MUTE

OUT1

INPUT SELECTOR,

ELECTRICAL VOLUME,

SURROUND/TONE CONTROL

IC304

SYSTEM CONTROLLER

IC301 (3/4)

: AUDIO

: CD PLAY

SIGNAL PATH

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

: AUDIO IN

: TUNER (FM/AM)

SEL1

VOL1

INPUT SELECTOR

IC312

14 12

X1 X0

Q319

INH

Q320

MUTING

Q103

R-CH

MUTING

CONTROL

SWITCH

Q340, 341

: DAB

POWER AMP

IC601

11 CH1 IN

MONITOR

CH1 OUT+

CH1 OUT–

STBY

J500

R-CH

PHONES

SPEAKER

+ –

–

J302

DETECT

Q342 – 344

POWER

MONITOR

Q345

M901 (FAN)

+9V

AC DET

D313

STK-ON

FAN MOTOR

DRIVE

Q316, 317

FAN MOTOR

DETECT

Q307, 347, 348

: iPod

(Page 17)

(Page 18)

(Page 20)

+ 43 hidden pages