Sony exr 12 service manual

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SERVICE MANUAL

EXR-IZ

U8 Model
Canadian Model

SONY w.-

ES-R400, XR-404O
MG-368HJ-32

Model Name Using Similar Mechanism
Tape Transport Mechanism Type

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWEFI OUTPUT AND TOTAL HARMONIC DlSTOFlTlON

4 watts per channel minimum continuous average power into 4
ohms, both channels driven, from 150 to 20,000 Hz with no more
than 1.5% total harmonic distortion.

Tuner section

FM

Tuning range
Antenna terminal
Usable sensitivity
Selectrvrty
Signal-to-noise ratio

Harmonic distortion at 1 kHz

Separation
Frequency response
Capture ratio

AM

Tuning range
Antenna terminal
Sensitivity

Cassette player section
Tape track

Frequency response
Signal~to-noxse ratio
Wow and ilutter

Power amplifier section
Outputs

Speaker impedance
Maximum power output

General

High-cut filter - 15 dB at 10 kHz
879-1078 MHz Bass boost v 10 dB at 100 Hz
External antenna connector Power requirements 12 V DC car battery (negative ground)
13 dB! (75 ohms) Mounting dimensions 178 x 50 x 134 mm (w/hld)

(71/3 x 2 x 5% inches)
1.3 kg (2 lb 14 DZ)
Mounting hardware (1 set)

More than 70 dB at 400 kHz
65 dB (stereo), 68 dB (monaurai)
0.9% (stereo), 0.5% (monaural)

Weight
Accessories supplied

35 dB at 1 kHz Power connecting cord (1)
30 - 15,000 Hz (:3 dB) Output lead Power antenna relay control lead
2.0 dB

Design and specifications subject to change without notice.

530 -1,710 kHz
Extemal antenna oonnector
32 uV

4-track 2-channel stereo
40 - 15.000 Hz

55 dB

0.13%

Speaker outputs (sure seal connectors)
4 - 8 ohms

75 W + 7.5 W (at 4 ohms)"
*Measured at 14.4 V

FM/AM CASSETTE CAR STERED
SONY;

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EXRJZ

Tuner section

. SSIR (Sony Super Interference Rejection) PLL
Synthesizer tuner.

- The quartz-locked digital synthesizer system
enables easy and accurate tuning.

- Up to 12 FM and 6 AM stations can be preset.

Cassette deck section
The auto-reverse function changes the tape
direction automatically.

Power amplifier section

0 Fader control for playback with a 4-speaker
system.

~ Maximum power output of 7.5 watts per
channeL

-The Hl-FlLTEFi (high-cut filter) eliminates the
trequency noise and delivers clear sound.

General
The quartz controlled digital clock.

SERVICING NOTE
Notes on chip component replacement

0 Never reuse a disconnected chip component.
0 Notice that the minus side of a tantalum capacitor
may be damaged by heat.

TABLE OF CONTENTS

Section Title Page
Specifications --------------------------- 1
Features ................................. 2

SECTION 1. GENERAL

Location and Function of Cuntrols ----- 3

Installation ........................... 4

ConnectiOns ............................ 5
SECTlON 2. DISASSEMBLY ~~~~~~~~~~~~~~ 6
SECTION 3. ADJUSTMENTS

3-1. Mechanical Adjustment: -- ' 7

3-2. Electrical Adjustments ----------- 7

SECTION 4. DIAG RAMS

4-1. Block Diagram -------------------- 10
4-2. Semiconductor Lead Layouts ------- 13
4-3. Printed Wiring Boards ------------ 13
44. Schematic Diagram ................ 17
4-5. FEl FM Front End Schematic

Diagram ........................ 20
4-5 [C Block Diagram ................. 21

SECTION 5. EXPLODED VIEWS

5-1. Chassis Assembly-1 ............... 22
5-2. Chassis Assembly-2 --------------- 23
5-3. MD Assembly-1 (MG-3GSHJ-32) . 24
5-4. MD Assembly-2 (MG-3GSHJ-32) """" 25

SECTION 6. ELECTRICAL PARTS LIST 26
Hardware List ......................... 31