SEN-T581, TA-AV581 — Sony Audio Service Manual (repair manual)

Model
SEN-T581 TA-AV581
Pages
25
Size
3.62 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
sen-t581-ta-av581.pdf
Date

View Sony SEN-T581 / TA-AV581 Service Manual online

TA-AV581
AEP Model
E Model
Australian Model
SERVICE MANUAL
INTEGRATED AV AMPLIFIER
MICROFILM
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol 
a
 and “Pro
Logic” are trademarks of Dolby Laboratories
Licensing Corporation.
SPECIFICATIONS
Amplifier section
European models:
(FRONT)
DIN power output
100 W + 100 W (at rear/center/
woofer off at 1 kHz, 8 
)
Continuous RMS power output
120 W + 120 W (at rear/center/
woofer off at 1 kHz, 10%
T.H.D., 8 
)
80 W/ch (at SURROUND ON
at 1 kHz, 10% T.H.D., 8 
)
(REAR)
50 W (at front/center/woofer
off at 1 kHz, 8 
)
(CENTER)
50 W (at front/rear/woofer off
at 1 kHz, 8 
)
(WOOFER)
80 W (at front/rear/center off
at 40 Hz, 4 
)
Other models:
Peak music power output
1900 W (total)
(FRONT)
Continuous RMS power output
100 W + 100 W (at rear/center/
woofer off at 1 kHz, 10%
T.H.D., 8 
)
(REAR)
50 W (at front/center/woofer
off at 1 kHz, 8 
)
(CENTER)
50 W (at front/rear/woofer off
at 1 kHz, 8
)
(WOOFER)
80 W (at front/rear/center off at
40 Hz, 4 
)
Inputs
PHONO (phono jacks):
sensitivity 2.5 mV,
impedance 50 k
CD (phono jacks):
sensitivity 400 mV,
impedance 50 k
TUNER, TAPE, VIDEO1,2 (phono jacks):
sensitivity 250 mV,
impedance 50 k
Outputs
TAPE REC OUT, VIDEO 1 (phono jacks):
voltage 250 mV,
impedance 1 k
PHONES (stereo phone jack):
accepts low and high
impedance headphones
TONE
± 10dB at 100 Hz and 10 kHz
General
Power requirements
European, Australian and Singaporean models:
230 V AC, 50/60 Hz
Other models:
110-120 V AC or
220-240 V AC, 50/60 Hz
(adjustable with the voltage
selector)
Power consumption
180 W
AC outlets
3 switched, total 100 W max.
Dimensions (w/h/d)
Approx. 430 
×
 160 
×
 355 mm
Mass
Approx. 8.5 kg
Supplied accessories
Remote RM-U581 (1)
Sony SUM-3 (NS) batteries (2)
Design and specifications are subject to change
without notice.
• This set is the amplifier
section in SEN-T581.
— 2 —
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 
!
 OR DOTTED LINE WITH
MARK 
!
 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.
SECTION  1
TEST MODE
[Fluorescent Indicator Tube, LED All Lit, and Key Check Mode]
1. When the plug is inserted into the outlet while pressing the
    3 CLASSIC button, the fluorescent indicator tube and LED
    will light up completely.
2. The mode changes as follows each time the 3 CLASSIC button
    and WOOFER ON/OFF button are pressed together after 1.
Sequence of Service Modes
Fluorescent Indicator
Tube and LED Check Mode
*1
AMP check mode
*2
 
 
Press the  3 CLASSIC  button and 
   WOOFER ON/OFF  button at the same time.
KEY check mode
*3
 
 
Press the  3 CLASSIC  button and
   WOOFER ON/OFF  button at the same time.
 
 
Press the  3 CLASSIC  button and  
   WOOFER ON/OFF  button at the same time.
*1 For checking if the fluorescent indicator tube and LED are lit
completely
*2 When the AMP check mode is set, “AMP” is displayed on the
fluorescent indicator tube. As this mode is not used for servicing,
perform step 2 to enter the KEY check mode.
*3 When the KEY check mode is set, “KEY 0”is displayed on the
fluorescent indicator tube. Each press of the button is counted.
(This excludes the  | / 
u  button)
When all buttons are pressed, the AMP check mode is set.
Buttons pressed once will not be counted when pressed again.
3. To exit the test mode, press the  | / 
u  button
TABLE OF CONTENTS
1.
TEST MODE
··································································· 2
2.
GENERAL
······································································· 3
3.
DIAGRAMS
3-1. Circuit Boads Location ························································ 4
3-2. Printed Wiring Boards – Display Section – ························· 5
3-3. Schematic Diagram – Display Section – ····························· 7
3-4. Printed Wiring Boards – Power Section – ··························· 9
3-5. Schematic Diagram – Power Section – ····························· 11
3-6. Printed Wiring Board – Main Section – ···························· 13
3-7. Schematic Diagram – Main Section (1/2) – ······················ 15
3-8. Schematic Diagram – Main Section (2/2) – ······················ 17
3-9. IC Pin Function Description ·············································· 19
3-10. IC Block Diagrams ···························································· 21
4.
EXPLODED VIEWS
4-1. Front Panel Section ···························································· 23
4-2. Chassis Section ·································································· 24
5.
ELECTRICAL PARTS LIST
···································· 25
SECTION  2
GENERAL
— 3 —
1
 POWER switch (I/
u
)
2
 DOLBY PRO LOGIC indicator
3
 SURROUND MODE buttons
4
 +, – buttons
5
 CONTROL MODE buttons
6
 SUPER WOOFER indicator
7
 MASTER VOLUME control
8
 WOOFER ON/OFF button
9
 PHONO button
 TUNER button
 CD button
!™
 TAPE button
 VIDEO 2 button
 VIDEO 1 button
!∞
 SOUND FIELD buttons
 CENTER MODE button
 PHONES jack
1
 REAR SPEAKERS
2
 AC OUTLET
     (AEP, Singapore, Australian Model)
3
 AC power cord
4
 WOOFER SPEAKER
5
 CENTER SPEAKER
6
 FRONT SPEAKERS
7
 VIDEO 1
8
 VIDEO 2
9
 TAPE
 CD
 TUNER
!™
 PHONO
LOCATION AND FUNCTION OF CONTROLS
[FRONT PANEL]
[REAR PANEL]
Photo : AEP, Singapore, Australian Model
SECTION  3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
TRANS 1 board
OUTLET board (AEP, SP, AUS Model) 
TRANS 2 board
SW board
HP board
DISPLAY board
VOL board
MAIN board
POWER board
REAR SP board  
4
For Schematic Diagrams.
Note:
• All capacitors are in µF unless otherwise noted.  pF:
µµF 50 WV or less are not indicated except for
electrolytics and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
%
: indicates tolerance.
¢
: internal component.
2
: nonflammable resistor.
1
: fusible resistor.
C
: panel designation.
U
: B+ Line.
V
: B– Line.
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
• Voltages are taken with a VOM (Input impedance
10M
).
Voltage variations may be noted due to normal
production tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
• Abbreviation
AUS
: Australian model.
SP
: Singapore model.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For Printed Wiring Boards.
Note:
• X
: parts extracted from the component side.
®
: Through hole.
¢
: internal component.
• b
: Pattern from the side which enables seeing.
• Waveform
• DISPLAY SECTION
1
 
IC401 
#∞
 (X2)
5.8Vp-p
5MHz
• MAIN SECTION
2
 
IC300 
 (OSC)
4.0Vp-p
8.0MHz
Note :
The components identified by mark 
!
 or dotted
line with mark 
!
 are critical for safety.
Replace only with part number specified.
Page of 25
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Here you can view online or download Sony SEN-T581 / TA-AV581 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony SEN-T581 / TA-AV581 Audio. Information contained in Sony SEN-T581 / TA-AV581 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).