Technics ST HD 350 Service Manual

Page 1

AD01 02037C2

Service Manual

SB-HD350

SB-HDI350

Remote
Control
Transmitter

RS-HDSSO SE-H 0350

Because of unique interconnecting cables, when a component
requires service, send or bring In the entire system.

Specifications

Pre-amplifier section
Input sensitivity/impedance:
EXT IN; 300 mV/15 k9

Tuner section

FM frequency range: 87.50 - 108.00 MHz
(0.05 MHz steps)
75 Q (unbalanced)
522 - 1629 kHz (9 kHz steps)
520 - 1630 kHz (10 kHz steps)

FM antenna terminal(s):
AM frequency range:

Tu ner

ST- H D350

Colour

(N) ........... Gold Type

Area

(E).... .Europe.

System SC-HD350
Tuner ST-HD350
Amplifier SE-HDS50
CD Player SL-HD350
Cassette Deck RS-HDSSO
Speakers SB-HDSSO
*: Made in Spain.

Timer section

Clock: Quarts - lock type

Function: Play timer (everyday), Rec timer (everyday),
Sleep (120 min, 30 min intervals)

General

Dimensions (Wx HXD): 206x76.3><251 mm

Mass: 10 kg

Notes: Specifications are subject to change without notice.
Mass and dimensions are approximate.

AWARNING

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 at potential dangers in attempting to sen/ice a product.
Products powered by electricity should be serviced or repaired only by experienced prolessional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technics®

© 2001 Matsush'rla Electric Industrial Co., Ltd, All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

ST-HD350

CONTENTS

1 Note
2 Before Repair ---------
3 Location of Controls
4 Operation Checks and Component Replacement Proceduress
4.1. Checking for the FL P.C.B. "3
4.2. Checking for the main P.C.B.

Page

7 Type Illustration of ICS, Translstors and Diodes -------------------- 5
8 Schematic Diagram Notes '5
9 Schematic Diagram ------- -6
10 Printed Circuit Board Diagram ---------------------------------------------- 13
11 Wiring Connection Diagram-
12 Block Diagram -

5 To Supply Power Source ----------- 3 13 Terminal Function of le

6 Self-Diagnostic Function -------------------------------------------------------- 4 13.1. Icso1 (CZBBGF000267):System Control/FL Drive --------- 20
6.1. To display the malfunction code -'4 14 Replacement Parts List-
6.2. To return to the normal display~ -'4 15 Cabinet Parts Location --
6.3. Display contents ------------------------------------------------------------ 4

2 Before Repair

This equipment (ST-HD350), which is a component of the
system, is supplied with power from the Amplifier (SE-H0350).
When repairing this equipment or checking operation of the
system, be sure to connect to the amplifier with it.

Power supply and operation check in the state of it as a single
equipment is impracticable.

1 Note

Refer to the service manual for Model No. SE-HD350 (Order
No. ADo102036c2) for information on Accessories and
Packaging.

3 Location of Controls

® Display panel
The display also shows information for the cassette deck, CD
player, and amplifier.

C2) Play timer/record timer button and indicator
(0 PLAY/e REC)

© Clock/timer button (CLOCK/TIMER)

@ Set button (SET)

C5) Tuning/time adjust buttons
(TUNE/TIME ADJUST V, A)

© Tuning mode button (TUNE MODE)

® FM band select button (FM)

AM band select button (AM)