Technics SAEX 140 Service Manual

Page 2

CD, TAPE, VCR 200 mV/22 k!) I General
S/N at rated power (80) Power supply AC 230-240 V, 50 Hz (For EB
PHONO 70 dB (IHF, A: 80 dB) onlyi
co, TAPE. VCR 75 dB (IHF, A: 85 dB) AC 230 V: 50 2 (For 959 °"'Vl
Tone controls Power consumption 19!) W
BASS 50 Hz, +10 to .10 dB (in standby condition: 3 W)
THEBLE 20 kHz, +10 to 40 dB Dimensions (W x H x D) 430 x 136 x 312 mm
Output voltage Weight 7>° k9
TAPE FtEC (OUT). VCR OUT 200 mV
Channel balance (250 Hz-6.3 kHz) 11 dB N°t651
Channel separation 55 dB 1. Specifications are subject to change without notice.
Headphones output level and impedance 430 mV/SSOQ Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service

or repair the product or products dealt with in this service inlormation by anyone else could result in serious injury or death.
CONTENTS

Page Page

1 Before Repair and Adjustment ----------------------------------------------- 3 a Type Illustrations 01 I05, Transistors & Diodes -14

2 Protection Circuitry 3 9 Terminal Functions of ICS rrrrrrrrrrrrrrrrrrrrrrrrrrrrr >15

3 Accessories ---------------------------------------------------------------------------- 3 10 Block Diagram ---------------------------------------------------------------------- 15

4 Caution for AC Mains Lead ---------------------------------------------------- 4 11 Schematic Diagram --------------------------------------------------------------- 19

5 Front Panel Controls -------------------------------------------------------------- 5 12 Printed Circuit Board ---------------------------------------- 21

6 Operation Checks and Main Component Replacement 13 erlng Connection Diagram --

Procedures ----------------------------------------------------------------------------- 6 14 Parts Location and Replacement Parts List
7 Troubleshooting -------------------------------------------------------------------- 11