DOWNLOAD Sony CMT-DH30 / HCD-DH30 Service Manual ↓ Size: 8.05 MB | Pages: 90 in PDF or view online for FREE

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.

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 

CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed 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 exterior.

(When letters/numbers appear in the
display)
When the self-diagnosis function
is activated to prevent the system
from malfunctioning, a 5-character
service number (e.g. C 13 50) with a 
combination of a letter and 4 digits
appears on the TV screen and the front
panel display. In this case, check the
following table.

C 13

• Clean the disc with a 

soft cloth.

C 31

correctly.

• Restart the system,

then re-insert the
disc correctly.

E XX
(XX is a 
number)

To prevent a 
malfunction, the
system has performed
the self-diagnosis
function.

• Contact your nearest

Sony dealer or local
authorized Sony
service facility and
give the 5-character
service number.
Example: E 61 10

When you turn on the system, the
version number [VER.X.XX] (X is a 
number) may appear on the TV screen.
Although this is not a malfunction and
for Sony service use only, normal system

the system, and then turn on the system
again to operate.

  .............................................   4

  ..................................................................   6

3-1.   Disassembly Flow ...........................................................   8
3-2.   Steel Cabinet ...................................................................   8
3-3.   Front Panel Block ...........................................................   9
3-4.   Back Panel Block ............................................................   9
3-5.   Main Chassis Block ........................................................   10
3-6.   DMB15 Board .................................................................   10
3-7.   DVD Mechanism Deck (CDM86-DVBU101) ...............   11
3-8.   Belt (MOT) .....................................................................   11
3-9.   Optical Pick-Up Block (KHM-313CAB) .......................   12

TEST  MODE 

 ............................................................   13

ELECTRICAL  CHECKS 

 ......................................   17

6-1.  Block Diagram - DVD, VIDEO Section - ......................   19
6-2.  Block Diagram - TUNER, USB Section - ......................   20
6-3.  Block Diagram - MAIN Section - ...................................   21
6-4. Block 

Diagram 

 

- PANEL, POWER SUPPLY Section - ...........................   22

6-5.  Printed Wiring Boards - SERVO Section (1/2) - ............   24
6-6.  Printed Wiring Board - SERVO Section (2/2) - ..............   25
6-7.  Schematic Diagram - SERVO Section (1/4) - .................   26
6-8.  Schematic Diagram - SERVO Section (2/4) - .................   27
6-9.  Schematic Diagram - SERVO Section (3/4) - .................   28
6-10.  Schematic Diagram - SERVO Section (4/4) - .................   29
6-11.  Printed Wiring Board - VIDEO Board - .........................   30
6-12.  Schematic Diagram - VIDEO Board - ............................   31
6-13.  Schematic Diagram - USB Board (1/2) - ........................   32
6-14.  Schematic Diagram - USB Board (2/2) - ........................   33
6-15.  Printed Wiring Board - USB Board - ..............................   34
6-16.  Printed Wiring Board - MAIN Board - ...........................   35
6-17.  Schematic Diagram - MAIN Board (1/2) - .....................   36
6-18.  Schematic Diagram - MAIN Board (2/2) - .....................   37
6-19.  Printed Wiring Board - AMP Board - .............................   38
6-20.  Schematic Diagram - AMP Board - ................................   39
6-21.  Printed Wiring Boards - INPUT/OUTPUT Section - .....   40
6-22.  Schematic Diagram - INPUT/OUTPUT Section - ..........   41
6-23.  Printed Wiring Board - POWER HT Board - .................   42
6-24.  Schematic Diagram - POWER HT Board - ....................   43
6-25.  Printed Wiring Boards - PANEL Section - .....................   44
6-26.  Schematic Diagram - PANEL Section - ..........................   45
6-27.  Printed Wiring Board - POWER Board - ........................   46
6-28.  Schematic Diagram - POWER Board - ..........................   47

7-1.  Steel Cabinet Section ......................................................   66
7-2.  Front Panel Section .........................................................   67
7-3.  Back Panel Section .........................................................   68
7-4.  DMB15 Board Section ....................................................   69
7-5.  MAIN Board Section ......................................................   70
7-6.  POWER Board Section ...................................................   71
7-7.  DVD Mechanism Deck Section 
 (CDM86-DVBU101) 

......................................................  

72

  ..............................   73

Accessories are given in the last of the electrical parts list.

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 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 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)

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.

RELEASING  THE  DISC  ANTITHEFT
The disc lock function for the antitheft of an demonstration disc in 
the store is equipped.

Releasing Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.  Press the [

DVD N

] button to select the “DVD”.

3.  While pressing the [

x

] button, press the [

Z

] button until 

“UNLOCKED” displayed on the fl uorescent indicator tube 
(around 5 seconds).

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

turning power on/off with the [

?/1

] button.

NOTES  ON  REPLACEMENT  OF  THE  DMB15  BOARD
IC103 on the DMB15 board cannot exchange with single. When 
this part is damaged, exchange the entire mounted board.

AEP model

4-136-539-0[]

Singapore model

4-136-539-1[]

Korean model

4-136-539-3[]

Russian model

4-136-539-4[]

Taiwan model

4-136-539-5[]

Chinese model

4-136-539-6[]

Thai model

4-136-539-7[]

DVD VIDEO

• DVD VIDEO

• DVD-R*/-RW*/+R/+RW

in DVD VIDEO format

* also in video mode

VR mode

• DVD-R/-RW

in VR (Video Recording) mode

VIDEO CD

• VIDEO CD

• Super VCD*

• CD-ROM*/-R*/-RW*

* in VIDEO CD or Super VCD format

CD

• AUDIO CD*

• CD-R*/-RW*

* in AUDIO CD format

DATA CD

• CD-ROM/-R/-RW

in DATA CD format, containing
MP3 audio tracks

1)

, JPEG image

2)

3)

, and

conforming to ISO 9660

4)

Level

1 or Level 2, or Joliet (expansion
format).

DATA DVD

• DVD-ROM/-R/-RW/+R/+RW

in DATA DVD format containing
MP3 audio tracks

1)

, JPEG image

2)

3)

, and

conforming to UDF (Universal Disk
Format).

1)

data. MP3 audio tracks must be in MPEG 1 Audio Layer 3 format.

2)

File System”: Image standards for digital cameras regulated by Japan Electronics and Information
Technology Industries Association (JEITA)).

3)

4)

Standardization).

“DVD+RW,” “DVD-RW,” “DVD+R,” “DVD VIDEO,” and the “CD” logos are trademarks.

• CD-ROMs recorded in PHOTO CD 

format

• DATA CDs recorded in MP3 PRO

format

• Data part of CD-Extras

1)

• Data part of Mixed CDs

2)

• Super Audio CDs
• DVD Audio discs
• DVD-RAMs
•

code.

• A disc that has a non-standard shape

(e.g., heart, square, star).

• A disc that has the adhesive cellophane

1)

(AUDIO CD data) on the tracks in session 1 
and data on the tracks in session 2.

2)

on the second and subsequent tracks of a 
session.

Your system has a region code printed
on the back of the  unit and will only
play back DVD VIDEOs labeled with
identical region code.
DVD VIDEOs labeled

will also be

played back on this system.
If you try to play back any other region
code DVD VIDEO, the message
“Playback prohibited by area limitations.”
will appear on the TV screen. Depending
on the DVD VIDEO, no region code
indication may be labeled even though
playing the DVD VIDEO is prohibited by
area restrictions.

A DualDisc is a two sided disc product
which mates DVD recorded material on
one side with digital audio material on
the other side. However, since the audio
material side does not conform to the
Compact Disc (CD) standard, playback
on this product is not guaranteed.

• In some cases, CD-Rs/-RWs and

DVD-Rs/-RWs/+Rs/+RWs cannot be
played back on this system due to the
recording quality or physical condition
of the disc, or the characteristics of
the recording device and authoring

back if it has not been correctly

the operation instructions for the
recording device.

• Note that some playback functions

may not work with some DVD+Rs/
+RWs, even if they have been correctly

normal playback.

• A disc created in Packet Write format

cannot be played back.

Some playback operations of DVD
VIDEOs and VIDEO CDs may be

Since this system play back DVD
VIDEOs and VIDEO CDs according to

designed, some playback features may
not be available. Also, refer to the
instructions supplied with the DVD
VIDEOs or VIDEO CDs.

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.

•

Session discs when an MP3 audio

session. Any subsequent MP3 audio

recorded in later sessions can also be
played back.

•

AUDIO CD or VIDEO CD format,

back.

•

Session disc as an AUDIO CD if there
is a session recorded in AUDIO CD 
format on the disc. However, the
system will only play back the disc if 

CD format.

• With DATA CD or DATA DVD, the

system will only play back DivX video