Sony str av 19 rec service manual

Page 1

SERVICE MANUAL

This model is almost the same as the model STR-AV320 previously produced.

US Model

Therefore. see the STR-AVZZO/AV320 service manual for the information not contained

in this service manual.

SPECIFICATIONS

Au '0 Power Spec '63 ns

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:

With 8-ohm load, both channels driven, from
4020.000 Hz, rated 40 watts per channel
minimum RMS power, with no more than
0.8% total harmonic distortion from 250
milliwatts to rated output.

Other Specmcations

Amplifier section
Continuous FIMS power output (8 ohms. at 1 kHz less than 0 8% total
harmonic distortion)

50 watts 50 watts

Harmonic distortion
Less than 0.8% at rated output

Frequency response
PHONO: RlAA equalization curve :05 dB
CD. VIDEO. TAPE: 10 Hz 7 50 kHz 2 dB
Inputs
Sensitivity lm nce S/N (weighting network. input
level)
74 dB
PHONO 2.5 mv 50 kilohms 72 118 (A. 2 5 mV)
CD
95 63
VIDEO 150 mV 50 kilohms .
TAPE 80 (18 (A. 150 mVI
' '781HF
Outputs
REC OUT. VIDEO (AUDIO) OUT Voltage 150 mV
Impedance 10 kilohms
SPEAKER A. B Accepts speakers 01
8 - 16 ohms
HEADPHONES Accepts low and high impedance
headphones

BASS.1I0 dB at 100 Hz
TREBLE :10 dB at 10 kHz

Tone controls

FM/AM tuner section

FM tuner section

AM tuner section

Tuning range

87.5 -108 MHz

530- 1.710 kHz

Antenna terminals

300 ohms. balanced
75 ohms. unbalanced

External antenna terminal

Sensmvny at 50 dB
qutetmg

18.3 dBt, 4 5 ,uV (mono)
38.3 dBl. 45 uV(stereo)

Usable sensmwty

11.2 dBI. 211v (IHF)

Loop antenna:
500 MV (at 1.000 kHz)

Signalto-noise 76 dB (mono) 54 dB (at 50 mV/m)
ratio 70 dB (stereo)
Harmonic 0.2: (mono). 0.4% 0 3% (at 50 mV/m.
distortion (stereo) at 1 kHz 400 Hz)
Selectiwty 60 dB at 400 kHz 40 dB at 10 kHz
Separation 45 dB at 1 kHz
Frequency 30Hz-15kHztg5 dB

response

General

System Tuner section PLL quartz-locked digital

synthesizer system
Preamplilier section: low-noise NF type
equalizer amp
Power amplilier section.
quasrcomplementary SEPP
Power requxrements
120 V AC. 60 Hz
Power consumption
100 watts
In standby condition: 5 watts

AC outlets One swrtched (100 watts)
Dimensions Approx. 430 )1 110 x 295 mm (win/d)
(17 Y 45/16 X 11 E'mnches)
including projecting parts and controls
Weight Approx. 6.2 kg (13 lbs 11 02) net

Accessories Supplied
Remote Commander RM-S7O (1)
Sony batteries SUM-3(NS) (2)
FM Wire antenna (1)
AM loop antenna (1)

Design and specmcalions subject to change without notice.

Muting - 20 dB
. English
Sony Corporation 90002401
. Printed in Japan
9-955-854-11 Audlo Group ©1990,4

Published by Customer Relations and Service Group

Page 2

LOCATION AND FUNCTION OF CONTROLS

"@300

13 14

234

56789

10 11 12

lIl POWER switch

Lil DIRECT TUNING button

[3.] Remote sensor

[E FM MODE button
When an FM stereo program is noisy or hard to receive,
press this button. The STEREO indicator goes out (the
sound is heard in monaural, but the reception will be
improved). To return to the stereo mode, press again or
change the frequency.

CE BAND selectors

[63 Display window

CD TUNING +/- buttons

El MEMORY button

IE Numeric buttons

[El SHIFT button

fiil PRESET +/- buttons

[1-2] VOLUME control and indicator

Bil SPEAKERS selectors
Depress to select which speaker system to drive. For
both speaker systems. depress A and B,

B5] HEADPHONES lack (stereo phone jack)

IE TONE controls
Turn the TREBLE control to adiust the high frequency
sound. Turn BASS control to adjust the low trequency
sound.

I33] BALANCE control
Turn clockwise to decrease the left channel volume, and
turn counterclockwise to decrease the right channel
volume.

Bil Function selectors

GE MUTING button and indicator
Press to attenuate the sound level immediately (-20 dB
attenuation). Pressing this button makes the indicator be
lighted. To restore the sound level, press again.

Remote Commander RM- 0

[1] POWER switch
[ii DBFB button

This button does not tunction.
[5U Tape deck operation buttons
TAPE 4 or P: Selects the TAPE function
and starts tape playback.
DECK A/ B: Set this switch to select a
deck of a doubledeck unit.
l3] VOLUME +/~ buttons
E TUNER PRESET +/- buttons
Depress to tune in a preset station

[33 MUTING button

Iii Turntable system operation buttons
PHONO START: Selects the PHONO
function and starts the playing of a
phono disc.

III CD player operation buttons
DISC SKIP: When your CD player is
equipped with 5 disc trays, use this
button to skip loaded disc.
CD >: Selects the CD function and starts
CD playback.

ill TUNER/VIDEO function buttons
Select TUNER or VIDEO function.