BMZ-K7D, CX-BK7 - Sony Audio Service Manual (repair manual)

Model
BMZ-K7D CX-BK7
Pages
127
Size
13.64 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
bmz-k7d-cx-bk7.pdf
Date

View Sony BMZ-K7D / CX-BK7 Service Manual online

SERVICE MANUAL
This system incorporates Dolby* Digital, Dolby Pro 
Logic (II) adaptive matrix surround decoder, and the 
DTS** Digital Surround System.
* Manufactured under license from Dolby 
Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are 
trademarks of Dolby Laboratories.
** Manufactured under license from Digital Theater 
Systems, Inc. “DTS” and “DTS Digital Surround” 
are registered trademarks of Digital Theater 
Systems, Inc.
US and foreign patents licensed from Dolby 
Laboratories.
DVD DECK RECEIVER
AEP Model
UK Model
E Model
Australian Model
CX-BK7
Ver 1.2  2004.09
9-961-333-03
Sony Corporation
2004I05-1
Personal Audio Company
C
 2004.09
Published by Sony Engineering Corporation
SPECIFICATIONS
CX-BK7 is the amplifier, disc player, tape
deck and tuner section in BMZ-K7D.
Amplifier section
The following measured at AC 120, 127, 220, 240 V,  
50/60 Hz
Rated Power Output at Stereo mode
Continuous RMS power output (reference)
Front speaker:
150 + 150 watts
(6 ohms at 1 kHz, 10% 
THD)
Center speaker:
50 watts (8 ohms at 1 kHz, 
10% THD)
Surround speaker:
50 watts (8 ohms at 1 kHz, 
10% THD) 
Inputs
LINE IN AUDIO (phono jacks):
voltage 1.1V, impedance 
47 kilohms
LINE IN VIDEO (phono jack):
max. input level 1Vp-p, 
unbalanced, Sync 
negative, impedance 
75 ohms
MD (AUX) IN (phono jacks):
voltage 1.1V, impedance 
47 kilohms   
MIC (phone jack):
sensitivity 1 mV, 
impedance 10 kilohms 
Model Name Using Similar Mechanism
NEW
DVD
DVD Mechanism Type
CDM69DV-DVBU16V
Section
Optical Traverse Unit Name
DBU-1
Tape deck
Model Name Using Similar Mechanism
NEW
Section
Tape Transport Mechanism Type
CMAL1Z241A
– Continued on next page –
Outputs
MD (AUX) OUT (phono jacks):
voltage 500 mV, 
impedance 4.7 kilohms 
VIDEO OUT (phono jack):
max. output level 
1 Vp-p, unbalanced, Sync 
negative, load impedance 
75 ohms
S-VIDEO OUT (4-pin/mini-DIN jack):
Y:  1 Vp-p, unbalanced, 
Sync negative,
C: 0.286 Vp-p, load 
impedance 75 ohms
COMPONENT VIDEO OUT:
Y:  1 Vp-p, 75 ohms
P
B
, P
R
: 0.7 Vp-p, 75 ohms
PHONES (stereo mini jack):
accepts headphones of 
32 ohms or more   
Front speaker:
Use  only the supplied 
speaker SX-BK7
Surround speaker:
Use only the supplied 
speaker SX-BK7R
Center speaker:
Use only the supplied 
speaker SX-BK7C
SUB WOOFER OUT:
voltage 1 V, 
impedance 1 kilohm
Disc player section 
System
Compact disc and digital 
audio and video system
Laser   
Semiconductor laser 
(DVD: 
λ
=657 nm, 
CD: 
λ
=793 nm)
Emission duration:  
continuous   
Frequency response   
DVD (PCM 48 kHz): 
2 Hz 
 22 kHz (
±
1 dB)
CD: 2 Hz 
 20 kHz (
±
1 dB)
Video color system format
NTSC, PAL
OPTICAL DIGITAL OUT (Euro/UK, Russian models
(Square optical connector jack, rear panel)
Wavelength
660 nm
Tape deck section   
Recording system   
4-track 2-channel stereo   
Frequency response   
100 
 10,000 Hz (
±
3 dB),
using Sony TYPE I cassette
only)
CX-BK7
2
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 ˚C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges oc-
cur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
Tuner section
FM stereo, FM/AM superheterodyne tuner   
FM tuner section
Tuning range
Russian model:
65.0 - 74.0 MHz  
87.5 - 108.0 MHz
Other models:
87.5 -108.0 MHz
Antenna
FM lead antenna
Antenna terminals
75 ohm unbalanced   
Intermediate frequency
10.7 MHz 
AM tuner section   
Tuning range 
Latin American models:
530 
− 1,710 kHz
(with the interval set at 
10 kHz)
531 
− 1,710 kHz
(with the interval set at 
9k Hz)
Saudi Arabian model:
531
− 1,602 kHz (with the 
interval set at 9 kH z)
Other models:
531 
− 1,602 kHz (with the 
interval set at 9 kHz)
530 
− 1,710 kHz (with the 
interval set at 10 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal   
Intermediate frequency
450 kHz  
General
Power requirements
Euro/UK, Russian models: 230 V AC, 50/60 Hz
Australian model:
230 
− 240 V AC, 50/60 Hz
Saudi Arabian model:
120 
− 127 V,  220 V AC, 
50/60 Hz 
Adjustable with voltage 
selector
Other models:
120 V,  220 V or 230 
− 
240 V AC, 50/60 Hz
Adjustable with voltage 
selector
Power consumption
250 watts
0.4 watts (in ECO MODE)
Dimensions (w/h/d) 
Approx. 211 
× 379 × 
419 mm
Mass
Approx. 10.8 kg
Design and specifications are subject to change 
without notice.
This appliance is 
classified as a CLASS 1 
LASER product. This 
label is located on the 
rear exterior.
The following caution label is located inside the 
apparatus. 
CX-BK7
3
You can play back the following discs on this 
system. Other discs cannot be played back.
List of playable discs
Playable discs
Format of 
discs 
Disc logo 
Contents
DVD VIDEOs
Audio + 
Video
VIDEO CDs 
Audio + 
Video
Audio CDs
Audio
CD-R/CD-RW 
(audio data)
Audio
The “DVD VIDEO” logo is a trademark.
Region code of DVDs you can 
play on this system
Your system has a region code printed on the 
back of the unit and will only play DVDs labeled 
with identical region code.
DVDs labeled 
 will also be played on this 
system.
If you try to play any other DVD, the message 
“Playback prohibited by area limitations.” will 
appear on the TV screen. Depending on the 
DVD, no region code indication may be labeled 
even though playing the DVD is prohibited by 
area restrictions.
Discs that this system cannot 
play
• CD-ROMs (except for extension “.MP3,” 
“.JPG,” or “.JPEG”)
• CD-Rs/CD-RWs other than those recorded in 
the following formats:
– music CD format
– video CD format
– MP3/JPEG format that conforms to 
ISO9660*
Level 1/Level 2, Joliet or Multi 
Session*
2
CD-R/CD-RW 
(MP3 files)
Audio
CD-R/CD-RW 
(JPEG files)
Video
Format of 
discs
Disc logo
Contents
ALL
Region code
(
Euro/UK, Russian models) 
DVD DECK RECEIVER
AC:230V    50/60Hz           W
MODEL NO. CX-BK7
SERIAL NO.
SERIAL NO.AREA
4-249-187-2  CEL/CEK
Sony Corporation
X
X
Region code
(
except Euro/UK, Russian
models)
• Data part of CD-Extras
• Super Audio CDs
• Progressive JPEG format files cannot be 
played on this system.
• DVD-RWs in VR mode (DVD-RWs created 
in VR (Video Recording) mode allow the 
contents to be programed or edited.)
• DVD-ROMs
• DVD Audio discs
• A DVD with a different region code.
• Audio  tracks in MP3PRO format.
• A  disc  that has a non-standard shape (e.g., 
card, heart).
• A  disc  with  paper or stickers on it.
• A  disc  that has the adhesive, cellophane tape, 
or a sticker still left on it.
*1
ISO9660 Format
The most common international standard for the 
logical format of files and folders on a CD-ROM. 
There are several specification levels. In Level 1, file 
names must be in the 8.3 format (no more than eight 
characters in the name, no more than three characters 
in the extension “.MP3” or “.JPG”) and in capital 
letters. Folder names can be no longer than eight 
characters. There can be no more than eight nested 
folder levels. Level 2 specifications allow file names 
and folder names up to 31 characters long. Each 
folder can have up to 8 trees.
For Joliet in the expansion format (file and folder 
names can have up to 64 characters) make sure of the 
contents of the writing software, etc.
*2
Multi Session
This is a recording method that enables adding of 
data using the Track-At-Once method. Conventional 
CDs begin at a CD control area called the Lead-in 
and end at an area called Lead-out. A Multi Session 
CD is a CD having multiple sessions, with each 
segment from Lead-in to Lead-out regarded as a 
single session.
CD-Extra: This format records audio (audio CD 
data) on the tracks in session 1 and data on the tracks 
in session 2.
CX-BK7
4
Notes on discs
• This system can play CD-R/CD-RW discs 
edited by the user. However, note that 
playback of some discs may not be possible 
depending on the recording device used for 
recording or the disc condition.
• Discs  recorded on CD-R/CD-RW drives may 
not be played back because of scratches, dirt, 
recording condition or the driver’s 
characteristics.
• CD-R and CD-RW discs that have not been 
correctly finalized (processing to allow play 
by a normal CD player) cannot be played.
• CD-R and CD-RW discs recorded in multi-
session that have not ended by “closing the 
session” are not supported.
• The  system may be unable to play MP3/JPEG 
format files that do not have the extender 
“.MP3,” “.JPG,” or “.JPEG.”
• Attempting to play non-MP3/JPEG format 
files that have the extender “.MP3,” “.JPG,” 
or “.JPEG” may result in noise or 
malfunction. Playback is possible up to 8 
levels.
• With formats other than ISO9660 level 1 and 
2, folder names or file names may not be 
displayed correctly.
• The  following discs take a longer time to start 
playback:
– a  disc recorded with a complicated tree 
structure.
– a  disc  recorded in Multi Session.
– a  disc to which data can be added (non-
finalized disc).
• Some CD-Rs, CD-RWs, DVD-Rs or DVD-
RWs (in video mode) (DVD-RWs created in 
video mode have the same format as a DVD 
VIDEO) cannot be played on this system 
depending upon the recording quality or 
physical condition of the disc, or the 
characteristics of the recording device. 
Furthermore, the disc will not play if it has not 
been correctly finalized. For more 
information, see the operating instructions for 
the recording device.
• A  disc  recorded in packet write format cannot 
be played.
Note on playback operations 
of DVDs and VIDEO CDs
Some playback operations of DVDs and VIDEO 
CDs may be intentionally set by software 
producers. Since this system plays DVDs and 
VIDEO CDs according to the disc contents the 
software producers designed, some playback 
features may not be available. Also, refer to the 
instructions supplied with the DVDs or VIDEO 
CDs.
Copyrights
This product incorporates copyright protection 
technology that is protected by U.S. patents and 
other intellectual property rights. Use of this 
copyright protection technology must be 
authorized by Macrovision, and is intended for 
home and other limited viewing uses only unless 
otherwise authorized by Macrovision. Reverse 
engineering or disassembly is prohibited.
Music discs encoded with 
copyright protection 
technologies
This product is designed to playback discs that 
conform to the Compact Disc (CD) standard. 
Recently, various music discs encoded with 
copyright protection technologies are marketed 
by some record companies. Please be aware that 
among those discs, there are some that do not 
conform to the CD standard and may not be 
playable by this product.
Cautions when playing a disc 
that is recorded in Multi 
Session
• This system can play Multi Session CDs when 
an MP3 audio track is contained in the first 
session. Any subsequent MP3 audio tracks 
recorded in later sessions can also be played 
back.
• This system can play Multi Session CDs when 
a JPEG image file is contained in the first 
session. Any subsequent JPEG image files 
recorded in later sessions can also be played 
back. 
• If  audio tracks and images in music CD 
format or video CD format are recorded in the 
first session, only the first session will be 
played back.

Download Sony BMZ-K7D / CX-BK7 Service Manual (Repair Manual)

Here you can view online and download Sony BMZ-K7D / CX-BK7 Service Manual in PDF. BMZ-K7D / CX-BK7 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony BMZ-K7D / CX-BK7 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.