Sony HCD-BX70DBi User manual

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
HCD-BX70DBi
SPECIFICATIONS
COMPACT DISC RECEIVER
9-889-139-03
2009B00-1
© 2009.02
AEP Model
UK Model
Ver. 1.2 2009.02
Model Name Using Similar Mechanism HCD-EC68
Base Unit Name BU-K6BD90-WOD
Optical Pick-up Block Name KSM-213DCP
• HCD-BX70DBi is the amplifier, 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, TM and ®marks are not specified.
Amplifier section
DIN power output (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
*objective lens surface on the Optical Pick-up Block with 7mm aperture.
This output is the value measurement at a distance of 200mm from the
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
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range:531 – 1,602 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz
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 –

HCD-BX70DBi
2
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
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
TABLE OF CONTENTS
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 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.
SAFETY-RELATED COMPONET WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
iPod section
Compatible iPod models:
iPod touch
iPod nano 3rd
generation
(video) iPod classic
iPod nano 2nd
generation
(aluminum)
iPod 5th
generation
(video)
iPod nano 1st
generation
iPod 4th
generation
(color display)
iPod 4th
generation
iPod mini
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.
Approx. 3.9 kg
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radia-
tion exposure.
This appliance is classified as
a CLASS 1 LASER product.
This marking is located on the
rear or bottom exterior.

HCD-BX70DBi
3
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Someprinted circuitboardsmay notcome printedwith
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 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.
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 electrostat-
ic 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
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
ANTITHEFT UNLOCK MODE
Procedure:
1. Press the [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select “CD”.
3. Press two buttons of [x/CANCEL] and [A] for 5 seconds.
4. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the disc tray is unlocked.
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.
Push the boss.
Insert the driver.

HCD-BX70DBi
4
SECTION 2
GENERAL This section is extracted
from instruction manual.
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.
1Turn on the system.
Press  (power) .
2Select the clock set mode.
Press TIMER MENU . If the current mode appears
on the display, press /repeatedly to select
“CLOCK SET?” and then press (enter) .
3Set the time.
Press /repeatedly to set the hour, and then
press (enter) . Use the same procedure to set the
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 . e clock is displayed for about 8
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.
1Press DAB AUTO SCAN on the unit.
“Auto Scan?” and “Push Enter” appear.
2Press (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.
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.
Slot
Adjusting the sound
To adjust the volume
Press VOLUME +/(or VOL +/on the unit) .
To add a sound eect
To Pre ss
Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)
DSGX on the unit.
Set the sound eect EQ repeatedly to select
“BASS” or “TREBLE,” and
then press +/repeatedly
to adjust the level.
Playing a CD/MP3 disc
1Select the CD function.
Press FUNCTION +/(or FUNCTION on the unit)
repeatedly.
2Place a disc.
Press (open/close) on the unit, and place a disc
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.
3Start playback.
Press (play) (or CD  (play/pause) on the
unit) .
To Press
Pause playback (pause) (or CD  (play/
pause) on the unit) .
To resume play, press the button
again.
Stop playback (stop) (or /CANCEL on the
unit) .
Select a folder on an
MP3 disc
+/(select folder) .
Select a track or le /(go back/go forward)
.
Find a point in a
track or le
Hold down /(rewind/
fast forward) during playback,
and release the button at the
desired point.
Select Repeat Play REPEAT repeatedly until
“REP” or “REP1” appears.
To change the play mode
Press PLAY MODE repeatedly while the player is
stopped. You can select normal play (“ ”
for all MP3
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.
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”).
1Select “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 on the unit.
2Select the tuning mode.
Press TUNING MODE repeatedly until “AUTO”
appears.
3Tune in the desired station.
Press +/(or TUNE +/on the unit) . Scanning
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 repeatedly until “AUTO”
and “PRESET” disappear, and then press +/(or TUNE
+/on the unit) repeatedly to tune in the desired
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.
Playing the iPod
1Select the iPod function.
Press FUNCTION +/(or FUNCTION on the unit)
repeatedly.
2Place the iPod.
3Start 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 Pre ss
Pause playback (pause) (or iPod 
(play/pause) on the unit) or 
(stop) .
Scroll up/down the
iPod menus
/. 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.
Select a track
or chapter of
audiobook/podcast
/(go back/go forward)
. To fast-forward or fast-
rewind, hold down the button.
Choose the selected
item
/ (enter) (or ENTER on
the unit) . You can choose the
selected item much like the center
button on the iPod or the touch
operation of the iPod touch.
To Press
Find a point in a
track or chapter of
audiobook/podcast
/(fast rewind/fast
forward) during playback, and
release the button at the desired
point.
Return to the
previous menu or
select a menu
/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.
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
connector . e charging status appears in the iPod
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 until the clock
disappears in the display.
Notes
When placing or removing the iPod, handle the iPod in the same
angle as that of the iPod connector on the unit and do not twist
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 /. You can fast
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.
Changing the display
To Pre ss
Change
information on the
display1)
DISPLAY repeatedly when the
system is on.
Check the clock
when the system
is o2)
DISPLAY when the system is
o3). e clock is displayed for 8
seconds.
1) For example, you can view CD/MP3 disc information, such as;
track or le number during normal play.
track or le name (“ ”) during normal play.
artist name (“ ”) during normal play.
album or folder name (“ ”) during normal play.
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.
2) e clock is displayed continuously while the iPod is being charged.
To turn o the clock display, press DISPLAY (See “To stop
charging the iPod”).
3) 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 Level 1,
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.
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
IN jack on the unit using an audio analog cord (not
supplied). Turn down the volume on the system, and
then select the AUDIO IN function.

HCD-BX70DBi
5
Other Operations
Creating your own program
(Program Play)
1Press FUNCTION +/(or FUNCTION on the unit) 
repeatedly to select the CD function.
2Press PLAY MODE repeatedly until“PGM” appears
while the player is stopped.
3Press /repeatedly until the desired
track or le number appears.
When programming les, press +/repeatedly
to select the desired folder, and then select the desired
le.
Total playing time of program
(including selected track
or le)
Selected track or le
number
4Press (or ENTER on the unit) to add the track
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.
5Repeat steps 3 through 4 to program additional
tracks or les, up to a total of 25 tracks or les.
6To 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.
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.
1Tune in the desired station (See “Listening to the
radio”).
2Press TUNER MEMORY .
Preset number
3Press +/repeatedly to select your desired
preset number.
If another station is already assigned to the selected
preset number, the station is replaced by the new
stations.
4Press .
5Repeat 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.
6To call up a preset radio station, press TUNING
MODE repeatedly until“PRESET” appears, and
then press +/repeatedly to select the desired
preset number.
Note on presetting DAB stations
You can preset a DAB service only when it can be received.
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 repeatedly. If you select “AUTO,” the
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.
1Prepare the sound source.
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.
2Press TIMER MENU .
3Press /repeatedly to select“PLAY SET?,” and
then press .
“ON” appears, and the hour indication ashes.
4Set the time to start playback.
Press /repeatedly to set the hour, and then
press .
e minute indication ashes. Use the procedure
above to set the minutes.
5Use the same procedure as in step 4 to set the time
to stop playback.
6Select the sound source.
Press /repeatedly until the desired sound
source appears, and then press . e display
shows the timer settings.
7Press  to turn o the system.
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.
To activate or check the timer again
1Press TIMER MENU .
“TIMER SEL?” ashes in the display.
2Press .
3Press /repeatedly to select“PLAY SEL?,” then
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.

HCD-BX70DBi
6
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2. PANEL (SIDE L/R)
(Page 7)
3-3. TOP PANEL BLOCK
(Page 7)
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)
3-9. POWER BOARD BLOCK
(Page 10) 3-7. PANEL (REAR) (Page 9)
3-11. DAB BOARD,
MODULE (DAB TUNER)
(Page 11)
3-4. TOP KEY BOARD,
IP BOARD, PANEL TOP (IP)
(Page 8)
SET

HCD-BX70DBi
7
Note: Follow the disassembly procedure in the numerical order given.
3-2. PANEL (SIDE L/R)
3-3. TOP PANEL BLOCK
two screws
(BVST3
×6)
two screws
(BVST3
×6)
screw
(BVTP3
×10)
screw
(BVTP3
×10)
panel (side L)
panel (side R)
screw
(BVTT3
×6)
screw
(BVTT3
×6)
five screws
(BVTP3
×10)

connector
(CN325)
connector
(CN322)
top panel block
screw
(PWH3
×6)
screw
(PWH3
×6)

HCD-BX70DBi
8
3-5. FRONT PANEL BLOCK
3-4. TOP KEY BOARD, IP BOARD, PANEL TOP (IP)
four screws
(BVTP2.6)
TOP KEY board
five screws
(BVTP2.6) two screws
(PWH2.6
×10)
HOLD board
four screws
(PTP2
×5)
RE IP board
RB escutcheon
RG four screws
(BVTP2.6 )
RH base (IP) assy
RI panel top (IP)
button (tune)
button (function B)
button (function)
button (enter)
RT connector
(CN101)
button
(VOL)
two screws
(BVST3
×6)
flexible flat cable (13 core)
(CN306)
screw
(BVTT3
×6)
front panel block

HCD-BX70DBi
9
3-6. REAR PANEL BLOCK
3-7. PANEL (REAR)
flexible flat cable (11 core)
(CN310)
fan motor connector (CN313)
rear panel block
two screws
(BVTP3
×10)
three screws
(BVST3
×6)
two screws
(BVTP3
×16)
panel (rear)
D.C. fan
(M901)
plate
(GND TU)
two feet (felt)
tuner (FM/AM)
flexible flat cable (11 core)
two screws
(BVST3
×6)

HCD-BX70DBi
10
3-8. AMP BOARD BLOCK
3-9. POWER BOARD BLOCK
flexible flat cable (7 core)
(AMP board: CN308/MAIN board: CN309)
two screws
(BV3)
AMP board block
connector (CN320)
connector (CN312)
screw
(BV3)
coating clip
four screws
connector (CN904) power cord connector (CN901)
POWER board block

HCD-BX70DBi
11
3-10. MAIN BOARD
3-11. DAB BOARD, MODULE (DAB TUNER)
connector
(CN316)
flexible flat cable (11 core)
(CN326)
flexible flat cable (21 core)
(CN305)
flexible flat cable (5P)
(CN311)
connector
(CN904)
two screws
(BVTT3
×6)
MAIN board
flexible flat cable
(DAB board: CN801/MAIN board: CN326)
two screws
(BVTP3
×8)
DAB board
module (DAB tuner)
Remove two solders.
connector pin 2P
DAB cable connector


HCD-BX70DBi
12
3-12. LOADING MECHANISM BLOCK
3-13. BASE UNIT
holder (CD)
three screws
(BV3)
loading mechanism block

flexible flat cable (21 core)
(CN305)
flexible flat cable (5 core)
(CN311)
flexible flat cable (5 core)
(CN001)
flexible flat cable (21 core)
(CN201)
two screws
(BVTP2.6)
door CD
insulator
insulator
base unit
insulator
insulator
two springs
(insulator)
two floating screws
two floating screws
floating screw

loading (BK) assy
– Bottom view –
two springs (insulator)

HCD-BX70DBi
13
3-14. BELT
belt
claw
claw
tray (AU)

belt
position of belt
3-15. OP BASE ASSY (KSM-213D)
Remove four solders.
flexible flat cable (16 core)
(CN301)
CD board
op base assy
(KSM-213D)

HCD-BX70DBi
14
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] si-
multaneously.
2. The system is reset and becomes standby states.
COMMON TEST MODE
This mode is used to check operations of amplifier.
Procedure:
1. Press the [?/1] button to turn the power on.
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 fluorescent 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 fluorescent indicator tube. Press the [VOL +] button,
“VOLUME MAX” is displayed on the fluorescent indicator
tube.
6. To release this mode, press the [?/1] button.
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 [EN-
TER] simultaneously.
3. All segments on the fluorescent indicator tube, [STANDBY]
LED light up.
4. Press the [ENTER] button, the model and destination are alter-
nately displayed on the fluorescent indicator tube.
5. Press the [ENTER] button again, MC version is displayed on
the fluorescent indicator tube.
6. Each time [ENTER] button is pressed, the display changes
starting from MC version, GC version, CLA version, CD ver-
sion, CDD version, CDMAversion, CDMB version, BDAver-
sion, 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 fluorescent 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 acti-
vated and “FFFFFF” is displayed on the fluorescent indicator
tube.
11. Each time a button is pressed, the AD of each button is dis-
played on the fluorescent indicator tube.
12. To releasethismode, pressthree buttons inthe same manneras
step 2, or disconnect the power cord.
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 [A] simultane-
ously.
4. After the “STANDBY” display blinks, “LOCK” is displayed
on the fluorescent indicator tube, the ship mode is set.
CD SHIP MODE & MEMORY CLEAR
This mode is used to perform CD ship mode and cold reset simul-
taneously.
Procedure:
1. Press the [?/1] button to turn the power on.
2. Press three buttons of [x/CANCEL], [VOL +] and [A] simul-
taneously.
3. After the “STANDBY” display blinks, “LOCK” is displayed
on the fluorescent 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 [?/1] button to turn the set on.
2. Press the [A] button to open the disc tray and set the CD disc.
3. Press the [A] button to close the disc tray.
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 fluorescent indi-
cator tube and the disc tray is locked. (Even if pressing the Z
button, the message “LOCKED” is displayed on the fluores-
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 fluorescent
indicator tube and the disc tray is unlocked.
CD POWER MANAGE
Thismodeis used to changedover CD power on/offfor 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. Themessage“CDPOWER”,“ON”or“CDPOWER”,“OFF”is
displayed on the fluorescent indicator tube, and CD power on/
off is changed over in the tuner mode.

HCD-BX70DBi
15
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] simul-
taneously, the message “SERVICE MO” is displayed on the
fluorescent indicator tube.
4. Press the [lmTUNE –] button to move the optical pick-
up to inside track and the message “SLED IN” is displayed on
the fluorescent indicator tube, or press the [MLTUNE
+] button to outside track and the message “SLED OUT” is
displayed on the fluorescent indicator tube.
5. Pressthe [CDu]button, “LDON” or“LD OFF”isdisplayed
on the fluorescent 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
16
SECTION 5
ELECTRICAL CHECKS
FM TUNE LEVEL CHECK
Procedure:
1. Turn on the set.
2. Inputthe followingsignalfrom signalgenerator toFMantenna
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 tuneA, B and C signals.
4. Confirm “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 MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure:
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the [?/1] button to turn the power on.
3. Set disc (YEDS-18) on the disc tray and press the [CD u]
button to playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
Checking Location:
TUNER SECTION CD SECTION
signal
generator
set
+
–
CD board
TP121 (RFI)
TP124 (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 ± 0.3 Vp-p
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101

HCD-BX70DBi
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)
95
89
A
AVDD
+3.3V
DETECTOR
FNi1 (A)
RFo
97 FPi1 (B) 88
2
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
2 VO1+
1 VO1–
13 DMo
AUTOMATIC
POWER CONTROL
Q301
LD
PD
LASER DIODE
OPTICALPICK-UP
BLOCK
(KSM-213DCP)
B
C
D
E
F
12 FMo
10 TRO
9FMO
20 IO0 (/HSO)
I-VAMP
M401
(SPINDLE)
M402
(SLED)
12 VO2–
11 VO2+
18 VO3+
17 VO3–
26 VO4+
27
7
IN4’ 24
IN3’ 20
IN2’ 9
IN1 3
BIAS 23
84 VRo
VO4–
M
M
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
S201
(LIMIT)
DVDD
+3.3V
24
XO
23
XI
X102
16.9344MHz 60 CD DRIVER MUTE
LOADING
MOTOR DRIVE
IC311
CDM LOAD IN 85
CDM LOAD OUT
CDM SW (OPEN)
CDM SW (CLOSE)
84
88
87
M
A
CD-L
: CD PLAY
SIGNALPATH
R-ch is omitted due to same as L-ch.
VCC
A
B
C
D
E
F
LD
PD
SP+
VC
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
CLOSE
M001
(LOADING)
(Page 19)

HCD-BX70DBi
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)
27
28
18
L-CH
R-CH
LINE-OUT-L
LINE-OUT-R
24 TXD_iPod
RXD 19 23 RXD_iPod
TXD
30 46
DGND
88 RESET
VBUS +5V
VBUS
B
iPod-L
MUTING
CONTROL
SWITCH
Q106
RESET SIGNAL
GENERATOR
IC103
MUTING
Q103, 105
E
TUNER-L
F
DAB-L
28TXD_DMPORT 77 CLINK_TX_DOUT29RXD_DMPORT
73 NC
DETECT
9
XOUT
11
XIN
X101
20MHz
TUNER (FM/AM)
AM
FMANT
AMANT
L OUT
R OUT
DO/STEREO
R-CH
ST DIN
ST CLK
ST CE
FM 75 Ω
COAXIAL
ANTENNA
26 DATAIN/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)
SIGNALPATH
R-ch is omitted due to same as L-ch.
: DAB
:AUDIO
D104
D102
LINEAMP
IC303
: iPod
LINEAMP
IC803
(Page 19)
(Page 19)
(Page 19)

HCD-BX70DBi
HCD-BX70DBi
1919
6-3. BLOCK DIAGRAM - MAIN Section -
AUDIO IN R-CH
J301
CD-L
A
DAB-L
F
TUNER-L
E
iPod-L
B
PROTECT J
10
3
1
26
SDA
25
SCL
AMP DATA
24
AMP CLOCK
22
INH
40
SELA
39
TA LINE MUTE
23
OUT1
INPUT SELECTOR,
ELECTRICALVOLUME,
SURROUND/TONE CONTROL
IC304
SYSTEM CONTROLLER
IC301 (3/4)
:AUDIO
: CD PLAY
SIGNALPATH
R-ch is omitted due to same as L-ch.
:AUDIO IN
: TUNER (FM/AM)
D1
5C1
SEL1
VOL1
B1
A1
INPUT SELECTOR
IC312
A
13
14
12
10
X1
X0
Q319
INH
6
Q320
X
11
MUTING
Q103
R-CH
23
MUTING
CONTROL
SWITCH
Q340, 341
: DAB
POWERAMP
IC601
11 CH1 IN
10
MONITOR
CH1 OUT+ 4
CH1 OUT– 5
13
STBY
J500
R-CH PHONES
SPEAKER
+
–
–
+R
LJ302
DC
DETECT
Q342 – 344
POWER
MONITOR
Q345
M901
(FAN)
+9V MM
AC DET K
D313
STK-ON
53
FAN MOTOR
DRIVE
Q316, 317
FAN MOTOR
DETECT
Q307, 347, 348
: iPod
7
(Page 17)
(Page 18)
(Page 18)
(Page 18)
(Page 20)
(Page 20)

HCD-BX70DBi
HCD-BX70DBi
2020
6-4. BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
SIRCS
4
SYSTEM CONTROLLER
IC301 (4/4)
(AC IN)
T902
SUB POWER
TRANSFORMER
RY901
T901
MAIN POWER
TRANSFORMER
RECT
D911 – 914
D923D922
D330
D920
PROTECT D332 D322
D318, 321
D303
D804, 805
AMP B+
F901
F902
TO
POWERAMP AMP B–
+9V
REGULATOR
IC305
REGULATOR
Q304 - 306
UNREG SUB
UNREG SUB
SYS +3.3V
+9V
RECT
D907, 908
EVER +3.3V
RESET SIGNAL
GENERATOR
IC310
RELAY
DRIVE
Q315
LF901
LINE
FILTER
TUNER, DAB +9V
5STBY-RELAY
20AC CUT
66I-POWER MONITOR
12RESET
REMOTE CONTROL
RECEIVER
IC901
X301
32.768kHz 11
10
XCOUT
INOUT
13
15
X302
5MHz XOUT
XIN
S801, 803 – 807,
S809 – 821
(FRONT PANEL KEYS) KEY1 – KEY3
RESET
SWITCH
Q309
AC DETECT
Q301
B+ SWITCH
Q312, 313
VM +7V
RECT
D924 – 927
+5V
REGULATOR
IC306
VBUS POWER
ON/OFF SWITCH
IC201
VBUS +5V
DAB +3.3V
DAB +1.2V
+3.3V
REGULATOR
IC801
+1.2V
REGULATOR
IC802
IP +3.3V +3.3V
REGULATOR
IC102
CD +1.5V +1.5V
REGULATOR
IC201
KEY WAKE UP
74
D774
STANDBY
D902 STANDBY LED
89
LED DRIVE
Q901 57CD ON
94X5V FLAG
80DMPORT POWER
52
51DAB-POWER 1.2V
DAB-POWER 3.3V
AVDD +3.3V
DVDD +3.3V +3.3V
REGULATOR
Q302, 303,
Q390, 392
RECT
D916 – 919
AC DET K
PROTECT J
+9V +4V
VOLTAGE
DETECT
Q393
PROTECT
DETECT
Q333, 338
VFL
FL901
FLUORESCENT
INDICATOR TUBE
T801
DC/DC
CONVERTER
RECT
D904, 905 OSC
Q903
GRID DRIVE
Q905
90
91
93
92
FLRESET
FLCS
FLSCLK
FLSD
RSTB
CSB
CLKB
DIN
GR1AD2,AD1 SG5 – SG35,
SG1 – SG4 GR2 – GR11
FLUORESCENT
INDICATOR TUBE DRIVER
IC902
+9V
52
32
53
54
55
1 – 31, 61 – 64 33 – 42
59, 60
81 – 83
+9V
REGULATOR
IC307
(Page 19)
(Page 19)