Sony seq a 70 service manual

Page 1

SEQ-AIU/D'Ifl'l

SERVICE MANUAL

This set is the Graphic
Equalizer section in
LBT-A70/A7OCD/A7OCDM/
D707/D707CD_

This photo is SEQ-A70.

E Model
Australian Model
Tourist Model

SEQ>A70

AEP Model
UK Model

SEQ-D707

SPECIFICATIONS

Boost/cut range i 12 dB

Centre frequency 63 Hz, 160 Hz, 400 Hz, 1 kHz,
2.5 kHz, 613 kHz. 15 kHz

Frequency response (with EFFECT OFF)

15 Hz to so kHz :3 as

Less than 0.02% (at 1 kHz,

1 V output)

Signal-to-noise ratio (with EFFECT OFF)
Better than 90 (18 (A network,
1 V output)

Power requirement A70:
110- 1 20V/220-240V AC,
adjustable wiIh the voltage selector,
50/60 Hz
AEP, Q lT model:
220V-230V AC, 50/60Hz
UK model:
240V AC, 50/60Hz

Power consumption 15 W

Weight Approx 2.7 kg
(5 lb 15 02)

Dimensions Approx. 355 x 95 x 305 mm
(14 x 3 3/1 x 12 V. inches)
(wlh/d, including projection)

Harmonic distortion

Design and specifications are subject to change without notice.

0G : Germany model
lT: Italian model

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A OR 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.

GRAPHIC EilllALlZER
SONY;

Page 2

SEQ-A70/ D707

MODEL IDENTIFICATION TABLE OF CONTENTS
- Specification Label -

Section T'tle P
E, EA, TR, AUS model: SEQ-A70 1 lie
AEP, IT. U G d I : SE -D707
" "° ° Q 1. GENERAL
1-1. Location of Controls iiiiiiiiiiiiiiiiiiiiiiiiiiiiii 2
SONY MODEL NO. V/////A
GRAPHIC EQUALIZER 2- DIAGRAMS
W 2-1. Block Diagram .................................... 3
2-2. Printed Wiring Boards ............. . . .5
2-3. Schematic Diagram .................. t .7

SERIAL No, 2-4. Semiconductor Lead Layouts ...................... 11
MADE IN JAPAN

3. EXPLODED VIEW ................................ 13
AEP, IT medel : AC: 220V-230V~ 50/60Hz 4. ELECTRICAL PARTS LIST ...................... 14
UK model : AC: 24OV~ 50/60Hz
E, EA, TR, AUS model: AC: 110-120V/220-240V~15W 50/60Hz
G model : SYSTEM LBTD707
AC: 220V-230V~ 50/60HZ
DEA : Saudi Arabia model
TR : Tourist model
AUS: Australian model
IT : Italian model
G : Germany model
SECTION 1
GENERAL

This section is extracted from
1-1. LOCATION OF CONTROLS Instruction manual.

POWER switch (8)
EFFECT button and indicator (36. 38, 40)
Preset setting indicators
CURSOR CONTROL buttons (38, 39)
Preset setting buttons (37)
FLAT button (40)
REVERSE button (40)
MEMORY buttons and indicator (39)
PERSONAL FILE 1 - 5 button and indicator (39)
SELECT 10 button and indicator (37)
Display window
Surround effect buttons
SURROUND MODE button (36)
SURROUND LEVEL button (36)
DISPLAY button (40)
DEMO button and indicator (35)

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