Hitachi SR-904 User Manual

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Congratulations!
STEREO RECEIVER
INSTRUCTION MANUAL
HITACH! Hi-Fi products are the proud result of HITACHI engineering research and development and over 50
years of experience in electronics. Laboratories and major testing facilities are maintained in Tokyoand Toyokawa,
Japan.
In choosing this fine HITACHI Hi-Fi product you have demonstrated an acute awareness of “getting the most for
your money’, With HITACHI products this is not an idle boast.
KEY TO ILLUSTRATIONS
POWER switch
PHONES jack
PROTECTION indicator
SPEAKERS switches (A,B)
BASS control
MIDRANGE control
TREBLE control
LOW FILTER switch
HIGH FILTER switch
VOLUME contro!
BALANCE contro}
TAPE COPY switch
TAPE MONITOR switch
FUNCTION switch
MODE switch
LOUDNESS switch
ADAPTOR switch
Tuning knob
TUNING meter
SIGNAL meter
Dial pointer
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4)
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(2)
13)
(5)
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20)
Qt)
SAFEGUARD
Electrical energy can perform many useful functions. This unit has been engineered and manufactured to
Program source indicators
FM AUTO LOCK indicator
FM STEREO indicator
Q5) Power meters
PHONO input terminals
Q7) AUX input terminals
TAPE-1 PLAY terminals
Q3) TAPE-1 REC OUT terminals
TAPE-1 DIN REC/PLAY socket
6) TAPE-2 PLAY terminals
62) TAPE-2 REC OUT terminals
83) ADAPTOR IN terminals
ADAPTOR OUT terminals
65) SPEAKERS terminals
AC line cord
67) FUSE
AM bar antenna
6) AM ANTENNA terminal
FM ANTENNA terminals
FM ANTENNA socket (75 ohms)
42 Ground terminal (GND)
22)
23)
24)
assure your personal safety. Improper use can result in potential electrical shock or fire hazards, In order
not to defeat the safeguards, observe the following instructions for its installation, use and servicing.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

Hitachi SR-904 Specifications

General

Tuning range	FM: 87.5-108 MHz, AM: 525-1605 kHz
Frequency response	10Hz to 50kHz
Damping factor	40
Input sensitivity	2.5mV (MM), 150mV (line)
Signal to noise ratio	75dB (MM)
Output	150mV (line)
Speaker load impedance	4Ω to 16Ω
Channel Separation	50 dB (1kHz)

Summary

General Safeguards and Warnings

Safeguard Information

Ensures personal safety by outlining proper installation and usage instructions.

Installation and Setup Guide

Installation Recommendations

Guidance on choosing an appropriate location for the SR-904 unit.

Connecting Components

Speaker Connection Guide

Turntable and Tape Deck Connections

Guidance on connecting turntables and tape decks to various input/output terminals.

Receiving Broadcasts

FM Broadcast Reception

Operation and Recording

Tape Deck Playback and Recording

Important Cautions and Specifications

Dynaharmony Amplifier Operation

Explanation of the Dynaharmony amplifier's principle and operation for peak power.

Technical Specifications

Detailed specifications for FM, AM, and Audio sections, including power and input sensitivity.