HST-SE581, SEN-R4820, SEN-T481 - Sony Audio Service Manual (repair manual)

AEP Model

E Model

Australian Model

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.

•

This set is the tuner deck and amplifier
section in SEN-T481.

Tape deck

Model Name Using Similar Mechanism

HST-471

Section

Tape Transport Mechanism Type

TCM-220WR2

— Continued on next page —

FM stereo, FM / AM superheterodyne tuner

FM tuner section

Tuning range

87.5 – 108.0 MHz

Antenna

FM leadantena

Antenna terminals

75 

Ω

 unbalanced

Intermediate frequency

10.7 MHz

AM tuner section

Tuningrange
    European model:

531 – 1,602 kHz

    Other models:

531 – 1,602 kHz (with the interval set at
9 kHz)
530 – 1,710 kHz (with the interval set at
10kHz)

     Antenna

AM loop antenna, outdoor antenna
terminals

     Intermediate frequency

450 kHz

European models:

(FRONT)
DIN power output

90 + 90 W
(at rear / center / woofer off at 1 kHz, 8 

Ω

)

Continuous RMS power output

110 + 110 W
(at rear / center / woofer off at 1 kHz,
 10% THD, 8 

Ω

)

70 W / ch
(at SURROUND ON at 1 kHz,
10% THD, 8 

Ω

)

(REAR)

40 W
(at front / center / woofer off at 1 kHz, 8 

Ω

)

(CENTER)

40 W
(at front / rear / woofer off at 1 kHz, 8 

Ω

)

(WOOFER)

70 W
(at front / rear / center off at 40 Hz, 4 

Ω

)

Other models:

Peak music power output

1,600 W (total)

(FRONT)
Continuous RMS power output

90 + 90 W
(at rear / center / woofer off at 1 kHz,
10% THD, 8 

Ω

)

(REAR)

40 W

(at front / center / woofer off at 1 kHz, 8 

Ω

)

(CENTER)

40 W
(at front / rear woofer off at 1 kHz, 8 

Ω

)

(WOOFER)

70 W
(at front /rear/ center off at 40 Hz, 4 

Ω

)

Inputs
     PHONO (phono jacks):

sensitivity 2.5 mV, impedance 50 k

Ω

     CD (phono jacks):

sensitivity 400 mV, impedance 50 k

Ω

     VIDEO1, 2 (phono jacks):

sensitivity 250 mV, impedance 50 k

Ω

— 2 —

MODEL NO. HST-SE581

— Model Number Label —

AEP, Singapore,

Malaysia : AC 230V ~ 50/60Hz 220W

Australian : AC 230V ~ 50Hz 220W

E : AC 110-120V, 220-240V selectable

~ 50/60Hz 220W

!

!

·········································································· 3

······································································ 5

······························ 6

································ 6

5-1.

Circuit Boards Location ····················································· 9

5-2.

Block Diagram ································································· 11

5-3.

Schematic Diagram — Main Section (1/2) — ················· 13

5-4.

Schematic Diagram — Main Section (2/2) — ················· 15

5-5.

Printed Wiring Board — Main Section — ······················· 17

5-6.

Printed Wiring Board — Display Section — ··················· 19

5-7.

Schematic Diagram — Display Section — ······················ 21

5-8.

Printed Wiring Board — SW Section — ·························· 23

5-9.

Schematic Diagram — SW Section — ···························· 25

5-10. Printed Wiring Board — Power Amp Section — ············· 27
5-11. Schematic Diagram — Power Amp Section — ··············· 29
5-12. Printed Wiring Board — Deck Section — ······················· 31
5-13. Schematic Diagram — Deck Section — ·························· 33
5-14. Printed Wiring Board — Power Transformer Section — · 35
5-15. Schematic Diagram — Power Transformer Section — ··· 37
5-16. IC Block Diagrams ··························································· 39
5-17. IC Pin Function ································································ 41

······················································ 43

······································· 47

Outputs
     VIDEO1 (phono jacks):

voltage 250 mV, impedance 1 k

Ω

     PHONES (stereo phone jack):

accepts low and high impedence headphones

Track method

4-track, 2-channnel stereo

Frequency response
     With DOLBY NR set to OFF
     TYPE-I tape:

60-13,000 Hz, 

±

 3 dB

     TYPE-II tape:

60-14,000 Hz, 

±

 3 dB

Power requirements
     European, Singapore and Malaysian models:

230 V AC, 50 / 60 Hz

     Australian model:

230 V AC, 50 Hz

     E model:

110 – 120 V AC or
220 – 240 V AC, 50 / 60 Hz
(selectable)

Power consumption

220 W

Dimensions (w/h/d)

Approx. 430 

× 

330 

× 

355 mm

Mass

Approx.10.5 kg

Supplied accessories:

Remote RM-U581 (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)

Design and specifications are subject to change
without notice.

— 3 —

1

10 KEY

2

MEMORY

3

SURROUND MODE (DOLBY/HALL/SIMULATED)

4

CONTROL MODE (–/

+

)

5

CONTROL MODE (TONE/CENTER/REAR/WOOFER)

6

MEMORY SCAN

7

STEREO/MONO

8

TUNING (–/

+

)

9

BAND

0

MASTER VOLUME

!¡

WOOFER ON/OFF

!™

DIRECTION (DECK B)

!£

DOLBY NR (DECK B)

!¢

DUBBING SPEED (HIGH/NORMAL) (DECK B)

!∞

REC (PAUSE/REC MUTING/REC) (DECK B)

!§ )

 (DECK B)

!¶ ·

 (DECK B)

!• ª

 (DECK B)

!ª p

 (DECK B)

@º 0

 (DECK B)

@¡

VIDEO 1/VIDEO 2/TAPE/CD/TUNER/PHONO

@™ ·

 (DECK A)

@£ ª

 (DECK A)

@¢ p

 (DECK A)

@∞ 0

 (DECK A)

@§ )

 (DECK A)

@¶

SOUND FIELD
(1 ROCK/2 POPS/3 CLASSIC/4 MOVIE/5 GAME)

@•

CENTER MODE

@ª

POWER  

1/u

1

2

3

4

5

6 7

8

9

0

!¡

!™

!£

!¢

!∞

!§

!¶

!•

!ª

@º

@¡

@™

@£

@¢

@∞

@§

@¶

@•

@ª

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— 4 —

#º

ANTENNA terminal

#¡

PHONO jack

#™

CD/VIDEO 1/VIDEO 2 jack

#£

SPEAKER terminal

#º

#¡

#™

#£

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Photo : AEP Model