Sony str av 20l rec service manual

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STR-AV2OL

General
System Tuner section: PLL quartz-locked digital
synthesizer system
Preamplifier section: low-noise NF type
equalizer amp
Power amplifier section: quaslcomplementary
SEPP
Power requirements
220 V AC, 50 Hz
Power consumption
90 watts
AC outtets Two switched (total 100 watts)
Dimensions Approx. 430 x 105 x 295 mm (wlhld)
(17 x 41/4 x 115/. inches)
including projecting parts and controls
Weight Approx. 6.0 kg (13 lbs 4 oz) net

Approx 7.1 kg (15 lbs 11 OZ) in shipping carton
Accessories supplied

FM ribbon antenna (1)
MW/LW layout-tree antenna (1)

FEATURES

The STFt-AV20L is a combined receiver and audio/video
control centert You can listen to various audio/video
program sources through the amplifier of the receiver and
the speakers connected to it. In the tuner section, a
quartz-locked digital synthesizer system allows precise
tuning,

A total of 10 FMIMWILW stations can be preset.

TABLE OF CONTENTS
SECTION 1 GENERAL
1-1. Location and Function of Controls .......... 3
SECTION 2 ADJUSTMENTS ................ 4
SECTION 3 DIAGRAMS
3-1. Mounting Diagram ..................... 9

3-2 Schematic Diagram .................... 13

SECTION 4 EXPLODED VIEWS AND PARTS
LIST ........................ 18

SECTION 5 ELECTRICAL PARTS LIST ....... 21

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STR-AV2OL

SECTION 1
GENERAL

1-1. LOCATION AND FUNCTION OF CONTROLS

_Disp|ay Window

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

E POWER switch

1] FM STEREO indicator

[E LOUDNESS button
Press when listening to a program source at a low
volume. The low trequency sound is emphasized.

@ VOLUME control knob

El HEADPHONES jack (stereo phone jack)

El 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

E MEMORY PRESEI button
E FMIMWILW band select buttons
E TUNING buttons

E] Number buttons
For presetting a station or for tuning in a preset station.

[E TAPE MONITOR and indlcator
[1:3] Functlon select buttons
E BALANCE control
Slide to RIGHT to decrease the left channel volume, and

slide to LEI-l to decrease the right channel volume.

El TONE (BASSITREBLE) controls

change the frequency.
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Rear
{CEir 9

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U] FMIMWILW external antenna terminals
[I] err (phone ground) terminal

E} PHONO IN jackstphonojack)

E] VIDEO (AUDIO) OUT jacks (phone jack)

[E TAPE REC OUT (recording output) jacks (phone jack)

E] SPEAKERS A, B connectors

E AC OUTLETS (SWITCHED)

LIT] CDIAUX (compact disclauxillary) IN jacks (phone jack)
E VIDEO (AUDIO) IN jacks (phone jack)

[E TAPE IN jacks (phone jack)

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