DAV-HDX678WF, DAV-HDX975WF, HCD-HDX678WF, HCD-HDX975WF - Sony Audio Service Manual (repair manual)

dav-hdx678wf, dav-hdx975wf, hcd-hdx678wf, hcd-hdx975wf service manual
Model
DAV-HDX678WF DAV-HDX975WF HCD-HDX678WF HCD-HDX975WF
Pages
110
Size
5.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
dav-hdx678wf-dav-hdx975wf-hcd-hdx678wf-hcd-hdx975w.pdf
Date

Read Sony DAV-HDX678WF / DAV-HDX975WF / HCD-HDX678WF / HCD-HDX975WF Service Manual online

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
SPECIFICATIONS
DVD RECEIVER
9-887-988-02
2008E05-1
© 
2008.05
US Model
HCD-HDX678WF
Canadian Model
HCD-HDX975WF
Ver. 1.1  2008.05
Model Name Using Similar Mechanism
HCD-HDX500
DVD Mechanism Type
CDM81C-DVBU101
Optical Pick-up Block Name
KHM-310CAB or 
KHM-313CAB
•  HCD-HDX678WF is the amplifier section, super audio CD/DVD sys-
tem, tuner section and video section in DAV-HDX678WF.
•  HCD-HDX975WF is the amplifier section, super audio CD/DVD sys-
tem, tuner section and video section in DAV-HDX975WF.
HCD-HDX678WF/
HDX975WF
Photo: HCD-HDX678WF
– Continued on next page –
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.
This system incorporates with Dolby* Digital and Dolby Pro Log-
ic (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 trade-
marks of Dolby Laboratories.
**  Manufactured under license from DTS, Inc.
 
“DTS” and “DTS Digital Surround” are registered trademarks 
of DTS, Inc.
This system incorporates High-Defi nition Multimedia Interface 
(HDMITM) technology.
HDMI, the HDMI logo and High-Defi nition Multimedia Interface 
are trademarks or registered trademarks of HDMI Licensing LLC.
“BRAVIA” and 
 are trademarks of Sony Corpora-
tion.
“S-AIR” and its logo are trademarks of Sony Corporation.
AUDIO POWER SPECIFICATIONS
for the US model
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
 
With 3 ohms loads, both channels 
driven, from 150 - 20,000 Hz; rated 
84 watts per channel minimum
 
RMS power, with no more than 
0.7% total harmonic distortion from 
250 milli watts to rated output.
Amplifi er Section 
US models:
Surround mode (reference)  RMS output power
 
FL/FR/C*: 143 watts (per channel 
at 3 ohms, 1 kHz, 10% THD)
 
Subwoofer*: 285 watts (at 1.5 
ohms, 80 Hz, 10% THD)
Other models:
Stereo mode (rated) 
108 W + 108 W (at 3 ohms, 1 kHz, 
1% THD)
Surround mode (reference)  RMS output power
 
FL/FR/C*: 143 watts (per channel 
at 3 ohms, 1 kHz, 10% THD)
 
Subwoofer*: 285 watts (at 1.5 
ohms, 80 Hz, 10% THD)
*  Depending on the decoding mode settings and the source, 
there may be no sound output.
Inputs (Analog)
TV (AUDIO IN) 
Sensitivity: 450/250 mV
SAT/CABLE (AUDIO IN)  Sensitivity: 450/250 mV
AUDIO IN 
Sensitivity: 250/125 mV
Inputs (Digital)
TV (COAXIAL IN/OPTICAL IN)
 
Impedance: 75 ohms/-
Outputs (Analog)
Phones 
Accepts low- and highimpedance 
headphones.
Super Audio CD/DVD System
Laser Semiconductor 
laser
 (Super 
Audio 
CD/DVD: 
λ = 650 
nm)
 (CD: 
λ = 790 nm)
 
Emission duration: continuous
Signal format system 
NTSC
Tuner Section
System 
PLL quartz-locked digital synthe-
sizer
FM tuner section
Tuning range 
87.5 MHz - 108.0 MHz (100 kHz 
step)
Antenna (aerial) 
FM wire antenna (aerial)
Antenna (aerial) terminals 
75 ohms, unbalanced
Intermediate frequency 
10.7 MHz
AM tuner section
Tuning range 
530 kHz - 1,710 kHz (with the 
interval set at 10 kHz)
 
531 kHz - 1,710 kHz (with the 
interval set at 9 kHz)
Antenna (aerial) 
AM loop antenna (aerial)
Intermediate frequency 
450 kHz
Video Section
Outputs 
VIDEO: 1 Vp-p 75 ohms
 COMPONENT:
 
Y: 1 Vp-p 75 ohms
 
P
B
/C
B
, P
R
/C
R
: 0.7 Vp-p 75 ohms
 
HDMI OUT: Type A (19 pin)
HCD-HDX678WF/HDX975WF
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.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 
WT-540A. Follow the manufacturers’ instructions to use these 
instruments.
2.  A battery-operated AC milliammeter. The Data Precision 245 
digital multimeter is suitable for this job.
3.  Measuring the voltage drop across a resistor by means of a 
VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable.  (See 
Fig. A)
Fig. A.  Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  0 SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COM-  POSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.
General
Power requirements 
120 V AC, 60 Hz
Power consumption
HCD-HDX678WF On: 
130 
W
 
Standby: 0.3 W (at the Power Saving 
mode)
HCD-HDX975WF On: 
130 
W
 
Standby: 0.3 W (at the Power Saving 
mode)
Output voltage (DIGITAL MEDIA PORT)
 DC 
V
Output current (DIGITAL MEDIA PORT)
 700 
mA
Dimensions (approx.) 
430 mm × 85 mm × 420 mm (17 in × 
3
/
8
 in × 16 
5
/
8
 in) (w/h/d) incl.
 projecting 
parts
 
430 mm × 85 mm × 450 mm (17 in × 
3
/
8
 in × 17 
3
/
4
 in) (w/h/d) with the
 
wireless transceiver inserted
Mass (approx.) 
5.2 kg (11 lb 8 oz)
Design and specifi cations are subject to change without notice.
HCD-HDX678WF/HDX975WF
3
SELF  DIAGNOSIS  FUNCTION
(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 front panel display. In this case, 
check the following table.
When displaying the version 
number on the TV screen
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 operation will not be possible. 
Turn off the system, and then turn on the system 
again to operate.
First 3 
characters of
the service 
number
Cause and/or corrective action
C 13
The disc is dirty.
Clean the disc with a soft cloth
(page 100).
C 31
The disc is not inserted 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
C:13:50
VER.X.XX
HCD-HDX678WF/HDX975WF
4
1. 
SERVICING  NOTES
  .............................................   5
2. GENERAL
  ..................................................................   9
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................  11
3-2. Case 
(DCR) 
.....................................................................  12
3-3.  Front Panel Block ...........................................................   12
3-4. POWER 
Board 
................................................................  13
3-5.  Back Panel Block ............................................................   13
3-6.  DSP Board, SPEAKER Board ........................................   14
3-7.  SERIPARA Board, MAIN Board ...................................   14
3-8. Cover 
(CDM-DCR) 
........................................................  15
3-9.  DVD Mechanism Deck (CDM81C-DVBU101) .............   15
3-10. Tray (Main) Assy ............................................................   16
3-11. MOTOR Board ...............................................................   16
3-12.  Optical Pick-up Section ..................................................   17
3-13.  Optical Pick-up Block
 
(KHM-310CAB or KHM-313CAB) ...............................   17
3-14.  Gear (Sub Tray 1)/Gear (Sub Tray 2) .............................   18
3-15. Lever (Mode) ..................................................................   18
3-16. Stocker Block ..................................................................   19
3-17. Cam (Stocker) .................................................................   19
3-18.  Gear (Stocker 3) ..............................................................   20
3-19.  Rotary Encoder (MD) (S771) .........................................   20
3-20. Gear (BU1) .....................................................................   21
4. 
TEST  MODE 
 ............................................................   22
5. ELECTRICAL 
 
ADJUSTMENTS 
 ........................   26
6. DIAGRAMS
6-1.  Block Diagram - RF SERVO/VIDEO Section - .............   27
6-2. Block 
Diagram 
 
- CHANGER/HDMI/DMPORT Section - ......................   28
6-3.  Block Diagram - TUNER/S-AIR Section - ....................   29
6-4.  Block Diagram - AUDIO Section - .................................   30
6-5.  Block Diagram - AMP Section - .....................................   31
6-6.  Block Diagram - PANEL/POWER SUPPLY Section - ..   32
6-7. Printed 
Wiring 
Board 
 
- MAIN Board (Component Side) - ................................   34
6-8. Printed 
Wiring 
Board 
 
- MAIN Board (Conductor Side) - ..................................   35
6-9.  Schematic Diagram - MAIN Board (1/12) - ...................   36
6-10.  Schematic Diagram - MAIN Board (2/12) - ...................   37
6-11.  Schematic Diagram - MAIN Board (3/12) - ...................   38
6-12.  Schematic Diagram - MAIN Board (4/12) - ...................   39
6-13.  Schematic Diagram - MAIN Board (5/12) - ...................   40
6-14.  Schematic Diagram - MAIN Board (6/12) - ...................   41
6-15.  Schematic Diagram - MAIN Board (7/12) - ...................   42
6-16.  Schematic Diagram - MAIN Board (8/12) - ...................   43
6-17.  Schematic Diagram - MAIN Board (9/12) - ...................   44
6-18.  Schematic Diagram - MAIN Board (10/12) - .................   45
6-19.  Schematic Diagram - MAIN Board (11/12) - .................   46
6-20.  Schematic Diagram - MAIN Board (12/12) - .................   47
6-21.  Printed Wiring Board - SERIPARA Board - ...................   47
6-22.  Schematic Diagram - SERIPARA Board - ......................   48
6-23.  Printed Wiring Board - DSP Board - ..............................   50
6-24.  Schematic Diagram - DSP Board - .................................   51
6-25.  Printed Wiring Board - S-AIR INC Board - ...................   52
6-26.  Schematic Diagram - S-AIR INC Board - ......................   53
6-27. Printed Wiring Board 
 
- I/O Board (Component Side) - .....................................   54
6-28. Printed Wiring Board 
 
- I/O Board (Conductor Side) - .......................................   55
TABLE  OF  CONTENTS
6-29.  Schematic Diagram - I/O Board - ...................................   56
6-30.  Printed Wiring Board - SPEAKER Board - ....................   57
6-31.  Schematic Diagram - SPEAKER Board - .......................   57
6-32.  Printed Wiring Board - JACK-KEY Section - ................   58
6-33.  Schematic Diagram - JACK-KEY Section - ...................   59
6-34.  Printed Wiring Boards - RELAY Section - .....................   60
6-35.  Schematic Diagram - RELAY Section - .........................   61
6-36.  Printed Wiring Board - FL Board - .................................   62
6-37.  Schematic Diagram - FL Board - ....................................   63
6-38.  Printed Wiring Board - POWER Board - ........................   64
6-38.  Schematic Diagram - POWER Board - ..........................   65
7. 
EXPLODED  VIEWS
7-1. Case 
Section 
....................................................................  84
7-2.  Front Panel Section .........................................................   85
7-3. Chassis 
Section 
...............................................................  86
7-4.  DVD Mechanism Deck Section-1 
 (CDM81C-DVBU101) 
...................................................  
87
7-5.  DVD Mechanism Deck Section-2 
 (CDM81C-DVBU101) 
...................................................  
88
7-6.  DVD Mechanism Deck Section-3
 (CDM81C-DVBU101) 
...................................................  
89
7-7.  Optical Pick-up Section ..................................................   90
8. 
ELECTRICAL  PARTS  LIST
  ..............................   91
Page of 110
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Here you can read online and download Sony DAV-HDX678WF / DAV-HDX975WF / HCD-HDX678WF / HCD-HDX975WF Service Manual in PDF. DAV-HDX678WF / DAV-HDX975WF / HCD-HDX678WF / HCD-HDX975WF service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony DAV-HDX678WF / DAV-HDX975WF / HCD-HDX678WF / HCD-HDX975WF 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.