Sony hst 404 service manual

Page 1

SERVICE MANUAL _ , . Canadian Model

E Model

This set is the tuner. deck and
amplifer section in FH-404.

Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
DOLBY and the double-D symbol D0 are trademarks of
Dolby Laboratories Licensing Corporation

Model Name Using Similar Mechanism DXA-209W

Tape Transport Mechanism Type DECKAZTCM-YM47CW~56
DECK BI TCM-YM47CW-57

SPECIFICATIONS

SWIMWtuner section (for E model)
System FM stereo, FM/AM superheterodyne tuner

SW 1 SW 2 MW
FM tuner section Tuning range 3.2 - 73 95 - 531 - 1,602
Tuning range 875 - 108 MHz MHz 21,75 kHz
Antenna Telescopic antenna MHz
Antenna terminals . . . r

75 ohms unbalanced Antenna Telescopic Built-in ferrite
antenna bar antenna

Intermediate frequency
10.7 MHZ External antenna terminal
Usable sensitivity 3.0 V (S/N = 30 dB/75 ohms)

Intermediate frequency 450 kHz
MW tuner section (tor Canadlan model) Usable Built-in 250 V/
sensltivlty ferrite bar - 999"ka
MW antenna ( Z)
Tuning range 530 ~ 1610 kHz External 30 yV 30 V 100 V
Antenna Builtin ferrite bar antenna, antenna (5 MHZ) (15 MHZ) (999 kHz)
External antenna terminal
intermediate frequency 450 kHz
- t d t -
Usable built-in 250 yV/m 0°" "e °" "ex page
sensitivity antenna (1000 kHz)
(SIN 2MB) external 100 V
antenna (1000 kHz)

CBMPACT Hl-DENSITY
COMPONENT SYSTEM

SONYa

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HST-404

Cassette Deck Sec

Recording system 4-track 2-channel stereo
Frequency response
DOLBY NR OFF (DIN)

TYPE II cassette (Sony UCX) 60 _ 14,000 Hz (:3 dB)

TYPE I cassette (Sony HF-S) 6O - 13,000 Hz (:3 dB)

Wow and flutter 0.1% WRMS
10.3% (DIN)

Amp ier Section

Continuous RMS power output
Canada model
25 + 25 watts (4 ohms,at1kHz,5/o THD)
18 + 18 watts (4 ohms, 80 Hz - 20 kHz,
1% THD)
E model
25 + 25 watts (4 ohms, at 1 kHz, 5% THD)
Peak music power output (E model)
240 watts (4 ohms)
DC operation with the EBP~88 (optional)
35W + 3.5W(1 kHz, 5% THD)

Inputs
Sensitivity Impedance
PHONO (phono jacks) 25 mV 50 kilohms
CD/AUX (phono jacks) 450 mV 50 kilohms
MIC (minijack) 1 mV 600 ohms
Outputs
HEADPHONES Accepts headphones of 8 ohms or
(stereo minijack) more
SPEAKER Accepts speakers of 4 to 16 ohms

MODEL IDENTIFICATION

Specification Label-

SONYoMODEL No. HST»404

W/ll/l/m

E MODEL : AC: 110-120/220-240V~50/60Hz 65W
Canadian MODEL :AC: 120V~60Hz 85W

SAFETY-RELATED COMPONENT WARNING! I

COMPONENTS IDENTIFIED BV MARK A 0R DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.

TABLE OF CONTENTS

Specifications 1 .
Model IdentifiCation ...............................

Section Me fig
1
2

SECTION 1 GENERAL

1-1. Parts Identification ............................ 3
SECTION 2 MECHANICAL ADJUSTMENTS ..... 4
SECTION 3 ELECTRICAL ADJUSTMENTS ....... 4
SECTION 4 DIAGRAMS
4-1. Semiconductor Lead Layouts .................. 8
ISemiconductor Location ........................ 9
4-2. Printed Wiring Boards ........................ 9
ALB, Schematic diagram

-Tuner Section (E model) .................... 13
4-4. Schematic diagram

-Tuner Section (Canadian modeI) t 15
4-5. Schematic diagram -Deck Section-.., ,. 17
4-6 Schematic diagram -Audio/Power Section-.. 19
SECTION 5 EXPLODED VIEWS
5-14 Front Panel, Case Section 21
5-2. Chassis Section 22
53 Mechanism Deck Section 23
SECTION 6 ELECTRICAL PARTS LIST ........ 24

ATTENTION AUCOMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A
sun LES DIAGRAMMES SCHEMATIoUEs ET LA LISTE
DES PIECES som cmnouEs POUR LA sEcumTE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS oUE PAR DES PIECES souv DONT LES
NUMéRos SONT DONNES' DANS CE MANUEL ou
DANS LEs SUPPLEMENTS PUBLIES PAR sowv.