Sony str k 5 service manual

Page 2

STR-K5

About area codes

The area code of the receiver you purchased is
shown on the lower portion of the rear panel (see
the illustration below).

2-XXX-XXX-XX AA
U LI-J
Area code

Any differe in operation, according to the area
code, are clearly indicated in the text, for example,
Models of area code AA only.

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead-

free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)

3 : LEAD FREE MARK
Unleaded solder has the following characteristics.
0 Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solderjoint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
0 Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
0 Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

TABLE OF CONTENTS

1. GENERAL 3
2. DISASSEMBLY
271. D mbly Flow 4
2-2. 4
273. Front Panel Assy .............................................................. 5
274. KARAOKE Board/AC SELECT Board

(Chilean and Peruvian Models) 5
2-5. MAIN Section ..................... 6
276 DIGITAL Board/MAIN Board 6
3. TEST MODE. 7
4. DIAG RAMS
471. Block Diagram 7 AUDIO INPUT Section 7 8
4-2. Block Diagram 7 MAIN Section 7 ........... 9

473 Block Diagram 7 KARAOKE Section 7
474. Block Diagram 7 PANEL Section 7..
475. Block Diagram

7AUDIO OUT, POWER SUPPLY Section 7 ................. 12
476. Schematic Diagram 7 MAIN Board (1/2) 7
477. Schematic Diagram 7 MAIN Board (2/2) 7
478. Printed Wiring Board 7 MAIN Board 7
4-9. Schematic Diagram 7 DIGITAL Board (1/3) 7
4710. Schematic Diagram 7 DIGITAL Board (2/3) 7

4711. Schematic Diagram 7 DIGITAL Board (3/3) 7 ............... 19
4712. Printed Wiring Board

7 DIGITAL Board (Component Side) 7 .......................... 20
4713. Printed Wiring Board

7 DIGITAL Board (Conductor Side) 7 ............................ 21

4714. Printed Wiring Boards 7 MIC Section 7
4-15. Schematic Diagram 7 MIC Section 7
4716. Printed Wiring Boards 7 DISPLAY Section 7
4717. Schematic Diagram 7 DISPLAY Section 7.

4718. Printed Wiring Board 7 KARAOKE Board 7
4-19. Schematic Diagram 7 KARAOKE Board 7 27
4720. Printed Wiring Boards 7 POWER SUPPLY Section 28
4721. Schematic Diagram 7 POWER SUPPLY Section 7 ........ 29

5. EXPLODED VIEWS

571. Overall Section ................................................................ 39
5-2. Front Panel Section
573. Chassis Section
574. MAIN Section ................................................................. 42

6. ELECTRICAL PARTS LIST..

SAFETY-RELATED COMPONENT WARNINGII

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 PUBLISHED BY SONY.