DHC-AZ77DBT, HCD-AZ77DBT - Sony Audio Service Manual (repair manual)

2007J05-1

© 

2007.10

• HCD-AZ77DBT is the amplifi er, Bluetooth, USB, 

disc player, tape deck and tuner section in DHC-
AZ77DBT.

DVD
Section

Model Name Using Similar Mechanism

HCD-AZ33D

DVD Mechanism Type

CDM86-DVBU101

Optical Pick-up Block Name

KHM-313CAB

Tape deck 
Section

Model Name Using Similar Mechanism

HCD-AZ33D

Tape Transport Mechanism Type

CRP42603

– Continued on next page –

Amplifi er section
The following measured at AC 120, 127, 220, 240 V, 
50/60 Hz
Power output (rated):
 

120 W + 120 W (4 Ω at 1 kHz, 1% THD)

RMS output power (reference)
 Front 

speaker:

 

150 W + 150 W (per channel at 4 Ω, 1 kHz, 10% 
THD)

 Center 

speaker:

 50 

W 

(8 

Ω at 1 kHz, 10% THD) Surround speaker:

 

50 W + 50 W (per channel at 8 Ω, 1 kHz, 10% 
THD)

Inputs
VIDEO/SAT IN (audio) (phono jacks): 
 

voltage 250/450 mV, impedance 47 kilohms

MIC 1/MIC 2 (phone jacks):
 

sensitivity 1 mV, impedance 10 kilohms

Outputs
VIDEO/SAT OUT (audio) (phono jacks):
 

voltage 250 mV, impedance 1 kilohm

VIDEO OUT (phono jack):
 

max. output level 1 Vp-p, unbalanced, Sync nega-
tive, 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

 

Pb/Cb: 0.7 Vp-p, 75 ohms

 

Pr/Cr: 0.7 Vp-p, 75 ohms

PHONES (stereo mini jack):
 

accepts headphones of 8 ohms or more

FRONT SPEAKER:
 

Use only the supplied speaker SSAZ77DBT.

SURROUND SPEAKER:
 

Use only the supplied speaker SSRSX77D.

CENTER SPEAKER:
 

Use only the supplied speaker SSCT77D.

Bluetooth section
Communication system:
 

Bluetooth Standard version 2.0

Output:
 

Bluetooth Standard Power Class 2

Maximum communication range:
 

Line of sight approx. 10 m

1)

Frequency band:
 

2.4 GHz band (2.4000 GHz – 2.4835 GHz)

Modulation method:
 FHSS
Compatible Bluetooth profi les

2)

:

 

A2DP (Advanced Audio Distribution Profi le) AVR-
CP (Audio Video Remote Control Profi le)

Supported codecs:
 

Receive: SBC (Sub Band Codec), MP3

 

Transmit: SBC (Sub Band Codec)

1)

 The actual range will vary depending on factors 

such as obstacles between devices, magnetic 
fi elds around a microwave oven, static electric-
ity, reception sensitivity, antenna’s performance, 
operating system, software application, etc.

2)

 Bluetooth standard profi les indicate the purpose 

of Bluetooth communication between devices.

USB section
Supported audio fi le format
 

MP3 (MPEG 1 Audio Layer-3) Bit rate: 32 – 320 
kbps*, VBR

Sampling frequencies:
 32/44.1/48 

kHz

 (USB) port:

 

Maximum current: 500 mA

This system incorporates Dolby

1)

 Digital, Dolby Pro Logic (II) adaptive matrix surround 

decoder, and DTS

2)

 Digital Surround System.

1)

 Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic”, and the 

double-D symbol are trademarks of Dolby Laboratories.

2)

 “DTS” and “DTS Digital Surround” are registered trademarks of DTS, Inc.

• DivX

®

 is a video fi le compression technology, developed by DivX, Inc.

  DivX, DivX Certifi ed, and associated logos are trademarks of DivX, Inc. and are used 

under license.

• The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of 

such marks by Sony Corporation is under license. Other trademarks and trade names are 
those of their respective owners.

• “WALKMAN” and “WALKMAN” logo are registered trademarks of Sony Corporation.
• MICROVAULT is a trademark of Sony Corporation.
• MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS and 

Thomson.

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.

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 

(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 or the front
panel display. In this case, check the
following table.

C 13

Clean the disc with a 

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.

This appliance is 
classified as a CLASS 1
LASER product. This
marking is located on the 
rear exterior.

CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.

Video color system format:
 

NTSC and PAL

* 128 kbps or higher bit rate is recommended.

Disc player section
System:
 

Compact disc and digital audio and video system 

Laser:
 Semiconductor 

laser 

(DVD: 

λ=650 nm, CD: λ=790 

nm) Emission duration: continuous

Frequency response
 

DVD (PCM 48 kHz): 2 Hz – 22 kHz (±1dB)

 

CD: 2 Hz – 20 kHz (±0.5 dB)

Video color system format:
 

NTSC and PAL

Tape deck section
Recording system:
 

4-track 2-channel, stereo

Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range:
 

87.5 – 108.0 MHz (50 kHz step)

Antenna:
 

FM lead antenna

Antenna terminals:
 75 

Ω unbalanced

Intermediate frequency:
 10.7 

MHz

AM tuner section
Tuning range:
 Australian 

model:

 

531 – 1,710 kHz (with the interval set at 9 kHz)

 

530 – 1,710 kHz (with the interval set at 10 kHz)

 Other 

models:

 

531 – 1,602 kHz (with the interval set at 9 kHz)

 

530 – 1,610 kHz (with the interval set at 10 kHz)

Antenna:
 

AM loop antenna

Antenna terminals:
 

External antenna terminal

Intermediate frequency:
 450 

kHz

General
Power requirements
 Australian 

model:

 

AC 230 – 240 V, 50/60 Hz

 Thai 

model:

 

AC 220 V, 50/60 Hz

 Other 

models:

 

AC 120, 220 – 240 V, 50/60 Hz, adjustable with 
voltage selector

Power consumption: 140 W
Dimensions (w/h/d) (excl. speakers):
Approx. 190 × 380 × 325 mm
Mass (excl. speakers): Approx. 6.7 kg

Design and specifi cations are subject to change without 
notice.

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

  ..................................................................   9

3-1. Disassembly 

Flow 

 

..........................................................  11

3-2. Case 

 

................................................................................  12

3-3. S-MASTER 

Board 

..........................................................  12

3-4. BT 

Board 

 

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

3-5.  DC Fan (M701), Tuner (FM/AM)  .................................   13
3-6.  DVD Mechanism Deck (CDM86-DVBU101)  ..............   14
3-7. POWER 

Board 

................................................................  15

3-8.  MAIN Board Block  .......................................................   15
3-9. MAIN 

Board 

...................................................................  16

3-10.  Front Panel Block ...........................................................   16
3-11.  Tape MECH Deck (CRP42603)......................................   17
3-12. DMB17 Board .................................................................   17
3-13.  Optical Pick-Up Block (KHM-313CAB) .......................   18
3-14.  Motor (Pulley) Assy (Loading) (M001) ..........................   18
3-15. Holder (BU) Assy ...........................................................   19
3-16.  Lever (BU Lock) .............................................................   19
3-17. Close Lever .....................................................................   20
3-18.  Lever (DIR), Gear (IDL-B) ............................................   20
3-19. Chassis (Top) ..................................................................   21
3-20.  Lever (Disc Sensor)/(Disc Stop) .....................................   21
3-21. Lever (Loading-L/R) .......................................................   22
3-22. Gear (IDL-C) ..................................................................   23

TEST  MODE 

 ............................................................   24

ADJUSTMENTS 

 ......................   27

ADJUSTMENTS 

 ........................   28

7-1.  Block Diagram - RF SERVO/VIDEO Section - .............   30
7-2. Block 

Diagram 

 

- BT/TUNER/TAPE DECK/MIC Section - ....................   31

7-3.  Block Diagram - AUDIO Section - .................................   32
7-4.  Block Diagram - AMP Section - .....................................   33
7-5. Block 

Diagram 

 

- PANEL/POWER SUPPLY Section - ............................   34

7-6. Printed 

Wiring 

Board 

 

- DVD SERVO Section (1/2) - ........................................   36

7-7. Printed 

Wiring 

Boards 

 

- DVD SERVO Section (2/2) - ........................................   37

7-8.  Schematic Diagram - DVD SERVO Section (1/4) - .......   38
7-9.  Schematic Diagram - DVD SERVO Section (2/4) - .......   39
7-10.  Schematic Diagram - DVD SERVO Section (3/4) - .......   40
7-11.  Schematic Diagram - DVD SERVO Section (4/4) - .......   41
7-12.  Printed Wiring Boards - BLUETOOTH Section - ..........   42
7-13.  Schematic Diagram - BLUETOOTH Section - ..............   43

7-14.  Printed Wiring Board - VIDEO Board - .........................   44
7-15.  Schematic Diagram - VIDEO Board - ............................   45
7-16.  Printed Wiring Board - MAIN Board - ...........................   46
7-17.  Schematic Diagram - MAIN Board (1/5) - .....................   47
7-18.  Schematic Diagram - MAIN Board (2/5) - .....................   48
7-19.  Schematic Diagram - MAIN Board (3/5) - .....................   49
7-20.  Schematic Diagram - MAIN Board (4/5) - .....................   50
7-21.  Schematic Diagram - MAIN Board (5/5) - .....................   51
7-22.  Printed Wiring Board - ADC Board - .............................   52
7-23.  Schematic Diagram - ADC Board - ................................   53
7-24. Printed Wiring Board 
 

- S-MASTER Board (Component Side) - .......................   54

7-25. Printed Wiring Board 
 

- S-MASTER Board (Conductor Side) - .........................   55

7-26.  Schematic Diagram - S-MASTER Board (1/4) - ............   56
7-27.  Schematic Diagram - S-MASTER Board (2/4) - ............   57
7-28.  Schematic Diagram - S-MASTER Board (3/4) - ............   58
7-29.  Schematic Diagram - S-MASTER Board (4/4) - ............   59
7-30. Printed Wiring Boards 
 

- HP MIC/SPEAKER Boards - .......................................   60

7-31.  Schematic Diagram - HP MIC/SPEAKER Boards - ......   61
7-32.  Printed Wiring Boards - EJECT/FL Boards - .................   62
7-33.  Schematic Diagram - EJECT/FL Boards - ......................   63
7-34. Printed Wiring Board 
 

- TOUCH SENSOR Board (Suffi x-11) - ........................   64

7-35. Printed Wiring Board 
 

- TOUCH SENSOR Board (Suffi x-12) - ........................   65

7-36.  Schematic Diagram - TOUCH SENSOR Board - ..........   66
7-37.  Printed Wiring Board - KEY Board -..............................   67
7-38.  Schematic Diagram - KEY Board - ................................   67
7-39.  Printed Wiring Board - POWER Board - ........................   68
7-40.  Schematic Diagram - POWER Board - ..........................   69

8-1. Case 

Section 

 

...................................................................  89

8-2.  Back Panel Section  ........................................................   90
8-3. Main 

Section 

 

..................................................................  91

8-4.  MAIN Board Section  .....................................................   92
8-5. Chassis 

Section 

 

..............................................................  93

8-6.  Tape Mechanism Deck Section  ......................................   94
8-7.  Center Panel Section  ......................................................   95
8-8.  DVD Mechanism Deck Section-1
 (CDM86-DVBU101) 

 

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

96

8-9.  DVD Mechanism Deck Section-2
 (CDM86-DVBU101) 

 

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

97

8-10.  DVD Mechanism Deck Section-3
 (CDM86-DVBU101) 

 

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

98

8-11.  DVD Mechanism Deck Section-4
 (CDM86-DVBU101) 

 

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

99

  ..............................  100

Thai model

3-094-931-0[]

240V AC area in E model

3-094-931-2[]

Australian model

3-094-931-3[]

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 viscou-s (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  SLOT  LOCK
The disc slot lock function for the antitheft of an demonstration 
disc in the store is equipped.

Releasing Procedure:
1. Press 

[

?

/

1

] button to turn the power on.

2.  Touch the [DVD] sensor to select the “DVD”
3.  Touch the [

x

] sensor and press the [

Z

] button simultaneously 

and hold down until “UNLOCKED” displayed on the fl uores-
cent indicator tube (around 5 seconds).

Note: When 

“

LOCKED

”

 is displayed, the slot lock is not released by 

turning power on/off with the

 [

?

/

1

]

 button.

NOTE  THE  IC103  ON  THE  DMB17  BOARD  REPLAC-
ING
When IC103 on the DMB17 board is damaged, exchange the new 
DMB17 board for the DMB17 board which IC103 damaged.

TOUCH  SENSOR  BOARD  DISCRIMINATION
In this set, the TOUCH SENSOR board has been changed in the 
midway of production.
Repair after distinguishing each type set to doing the repair refer-
ring to the following.