Technics ST HD 550 Service Manual

Page 2

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 lOs, Transistors and Diodes .................... 5
8 Schematic Diagram Notes -5
9 Schematic Diagram ------- .3
10 Printed Circuit Board Diagram .............................................. 13
11 Wiring Connection DiagraM
12 Block Diagram '-

5 To Supply Power Source ----------- "3 13 Terminal Function of me

6 Self-Diagnostic Function -------------------------------------------------------- 4 13.1. mm (CZBBGF000257):System Control/FL Drive --------- 20
6.1. To display the malfunction code --4 14 Replacement Parts Llst-
6.2. To return to the normal display- --4 15 Cabinet Parts Locatlon --
6.3. Display contents ------------------------------------------------------------ 4

2 Before Repair

This equipment (ST-HD550), which is a component of the
system, is supplied with power from the Amplifier (SE-HD550).
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-HD550 (Order
No. AD0101 01502) 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.

(9 Play tlmer/record tlmer button and Indicator
(6) PLAY/o REC)

© Clock/timer button (CLOCK/TIMER)

@ Set button (SET)

© Tunlngltlme adjust buttons
(TUNE/TIME ADJUST V, A)

© Tuning mode button (TUNE MODE)

® RDS button (RDs)

Band select button (FWAM)