Read Sony HT-DDW785 / HTP-78DW / STR-K785 Service Manual online
SERVICE MANUAL
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
Published by Sony Techno Create Corporation
AEP Model
E Model
Australian Model
MULTI CHANNEL AV RECEIVER
9-887-648-03
2007G16-1
© 2007.07
© 2007.07
Ver. 1.2 2007.07
SPECIFICATIONS
STR-K785
• STR-K785 is the tuner and the amplifier
section in HT-DDW785 and HTP-78DW.
Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are trademarks of
Dolby Laboratories.
“DTS” and “DTS Digital Surround” are registered trademarks of
Digital Theater Systems, Inc.
“Dolby”, “Pro Logic” and the double-D symbol are trademarks of
Dolby Laboratories.
“DTS” and “DTS Digital Surround” are registered trademarks of
Digital Theater Systems, Inc.
— Continued on next page —
Amplifier section
Power Output
1)
Models of area code SP and SP6
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
70 W + 70 W
Surround mode
2)
(reference) (6 ohms 1 kHz,
THD 10%)
RMS output
FRONT: 100 W per
channel
CENTER: 100 W
SURROUND: 100 W per
channel
FRONT: 100 W per
channel
CENTER: 100 W
SURROUND: 100 W per
channel
Models of area code AUS
Stereo mode (rated) (6 ohms 120 Hz – 20 kHz,
THD 0.09%)
50 W + 50 W
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
85 W + 85 W
Surround mode
2)
(reference) (6 ohms 1 kHz,
THD 10%)
RMS output
FRONT: 122 W per
channel
CENTER: 122 W
SURROUND: 122 W per
channel
FRONT: 122 W per
channel
CENTER: 122 W
SURROUND: 122 W per
channel
1)
Measured under the following conditions:
2)
Reference power output for front, center and
surround speakers. Depending on the sound field
settings and the source, there may be no sound
output.
surround speakers. Depending on the sound field
settings and the source, there may be no sound
output.
Area code
Power requirements
SP, SP6
230 V AC, 50 Hz
AUS
240 V AC, 50 Hz
AEP
230 V AC, 50 Hz
Inputs
Analog
Sensitivity: 800 mV/
50 kohms
50 kohms
Digital (Coaxial)
Impedance: 75 ohms
Outputs (Analog)
SUB WOOFER
Voltage: 2 V/1 kohm
Tone
Gain levels
±
6 dB, 1 dB step
Reproduction frequency range:
28 – 20,000 Hz
FM tuner section
Tuning range
87.5 - 108.0 MHz
Antenna
FM wire antenna
Antenna terminals
75 ohms, unbalanced
Intermediate Frequency
10.7 MHz
AM tuner section
Tuning range
Stereo mode (rated) (6 ohms, 1 kHz, THD 1%)
85 W + 85 W
Surround mode
2)
(reference) (6 ohms, 1 kHz,
THD 10%)
RMS output
FRONT:122 W
per channel
per channel
CENTER:122 W
SURROUND:122 W
per channel
per channel
Models of area code AEP
With 9-kHz tuning scale:
531 - 1,602 kHz
Antenna
Loop antenna
Intermediate Frequency
450 kHz
Video section
Inputs/Outputs
Video:
1 Vp-p, 75 ohms
COMPONENT VIDEO:
Y: 1 Vp-p, 75 ohms
P
B
/C
B
: 0.7 Vp-p,
75 ohms
P
R
/C
R
: 0.7 Vp-p,
75 ohms
80 MHz HD Pass Through
2
STR-K785
Notes on chip component replacement
•
Never reuse a disconnected chip component.
•
Notice that the minus side of a tantalum capacitor may be
damaged by heat.
damaged by heat.
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
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
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
occur such as on IC pins, etc.
Unleaded solder is more viscou-s (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.
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
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 PUBLISHED BY SONY.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
About area codes
The area code of the receiver you purchased is
shown on the lower right portion of the rear panel
(see the illustration below).
shown on the lower right portion of the rear panel
(see the illustration below).
Any differences in operation, according to the area
code, are clearly indicated in the text, for example,
“Models of area code AA only”.
code, are clearly indicated in the text, for example,
“Models of area code AA only”.
CENTER
FRONT
L
R
L
R
+
+
Area code
• Abbreviation
AUS
: Australian model
SP
: Singapore model
SP6
: Singapore and Malaysia models
General
Power requirements
Power consumption
Power consumption (during standby mode)
0.3 W
Dimensions (w/h/d) (Approx.)
430
×
145
×
300 mm
including projecting parts
and controls
and controls
Mass (Approx.)
7.5 kg
Area code
Power requirements
AUS
240 V AC, 50 Hz
SP, SP6
230 – 240 V AC, 50/60 Hz
AEP
Area code
Power consumption
190 W
SP, SP6
170 W
Design and specifications are subject to
change without notice.
change without notice.
230 V AC, 50/60 Hz
AUS/AEP
Ver. 1.2
MODEL IDENTIFICATION
– Rear Panel –
– Rear Panel –
Parts No.
Model
Part No.
SP and SP6 models
2-662-452-3
[]
AUS model
2-662-452-4
[]
AEP model
2-662-452-5
[]
3
STR-K785
TABLE OF CONTENTS
1.
GENERAL
...................................................................
4
2.
TEST MODE
............................................................... 10
3.
ELECTRICAL ADJUSTMENT
............................. 12
4.
DIAGRAMS
4-1.
Block Diagram – MAIN Section – .................................. 14
4-2.
Block Diagram – DISPLAY/POWER Section – ............. 15
4-3.
Printed Wiring Board – DIGITAL Board (Side A) – ...... 16
4-4.
Printed Wiring Board – DIGITAL Board (Side B) – ...... 17
4-5.
Schematic Diagram – DIGITAL Board (1/3) – .............. 18
4-6.
Schematic Diagram – DIGITAL Board (2/3) – .............. 19
4-7.
Schematic Diagram – DIGITAL Board (3/3) – .............. 20
4-8.
Printed Wiring Board – MAIN Board – ......................... 21
4-9.
Schematic Diagram – MAIN Board (1/3) – ................... 22
4-10. Schematic Diagram – MAIN Board (2/3),
HEADPHONE Board – ................................................... 23
4-11. Schematic Diagram – MAIN Board (3/3),
ADCC Board, STANDBY Board – ................................. 24
4-12. Printed Wiring Boards
– ADCC Board, HEADPHONE Board – ........................ 25
4-13. Printed Wiring Board – STANDBY Board – ................. 26
4-14. Printed Wiring Board – DISPLAY Board – ................... 27
4-15. Printed Wiring Boards
4-14. Printed Wiring Board – DISPLAY Board – ................... 27
4-15. Printed Wiring Boards
– TUNING Board, POWER Board – .............................. 28
4-16. Schematic Diagram – DISPLAY Board,
TUNING Board, POWER Board – ................................. 29
4-17. Printed Wiring Board – VIDEO Board – ........................ 30
4-18. Schematic Diagram – VIDEO Board – .......................... 31
4-18. Schematic Diagram – VIDEO Board – .......................... 31
5.
EXPLODED VIEWS
5-1.
Front Panel Section ......................................................... 39
5-2.
Chassis Section ................................................................ 40
6.
ELECTRICAL PARTS LIST
.................................. 41
4
STR-K785
SECTION 1
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
Front panel
Receiver
AUTO CAL MIC
PHONES
MEMORY
FM MODE
TUNING
+
PRESET TUNING
VIDEO 1
VIDEO 2
DVD
SA-CD/CD
FM
AM
AMP MENU
ENTER
MASTER
VOLUME
VOLUME
INPUT MODE
+
DISPLAY
DIMMER
2CH
A.F.D.
MOVIE
MUSIC
?/1
1
2 3
6 7
8
9
5
qj
qk
ql
w;
qg
qh
qf
qaq;
qs
qd
4
Name
Function
A ?
/
1
Press to turn the receiver
on or off (page 23, 30, 31,
44).
on or off (page 23, 30, 31,
44).
B
DISPLAY
Press to select information
displayed on the display
(page 50).
displayed on the display
(page 50).
C
DIMMER
Press to adjust the
brightness of the display.
brightness of the display.
D
Remote sensor
Receives signals from
remote commander.
remote commander.
E
Display
The current status of the
selected component or a
list of selectable items
appears here (page 6).
selected component or a
list of selectable items
appears here (page 6).
F
2CH
Press to select 2CH
STEREO mode (page 38,
44).
STEREO mode (page 38,
44).
G
A.F.D.
Press to select A.F.D. mode
(page 41).
(page 41).
Name
Function
H
MOVIE,
MUSIC
MUSIC
Press to select sound fields
(MOVIE, MUSIC) (page
42).
(MOVIE, MUSIC) (page
42).
I
MASTER
VOLUME
VOLUME
Turn to adjust the volume
level of all speakers at the
same time (page 28, 29,
30, 31).
level of all speakers at the
same time (page 28, 29,
30, 31).
J
ENTER
Press to store a station or
enter the selection when
selecting the settings
(page 23, 26, 27, 32, 48,
49).
enter the selection when
selecting the settings
(page 23, 26, 27, 32, 48,
49).
K
INPUT MODE
Press to select the input
mode when the same
components are connected
to both digital and analog
jacks
mode when the same
components are connected
to both digital and analog
jacks
(page 49)
.
L I
/
i
/
U
/
u
After pressing AMP
MENU (M), press I or i
and U or u to select the
settings.
MENU (M), press I or i
and U or u to select the
settings.
M
AMP MENU
Press to display the menu
of the receiver.
of the receiver.
N
Input buttons
Press one of the buttons to
select the component you
want to use.
select the component you
want to use.
O
PRESET
TUNING +/–
TUNING +/–
Press to select a preset
station.
station.
P
TUNING +/–
Press to scan a station.
Q
MEMORY
Press to store a station.
R
FM MODE
Press to select FM
monaural or stereo
reception.
monaural or stereo
reception.
S
PHONES jack
Connects to a headphone
(page 55).
(page 55).
T
AUTO CAL MIC
jack
jack
Connects to the supplied
optimizer microphone for
the Auto Calibration
function (page 24).
optimizer microphone for
the Auto Calibration
function (page 24).
