HT-SL40, STR-KSL40, STR-SL40 - Sony Audio Service Manual (repair manual). Page 2

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S/N
Mono:

76 dB

Stereo:

70 dB

Harmonic distortion at 1 kHz
Mono:

0.3%

Stereo:

0.5%

45 dB at 1 kHz

30 Hz – 15 kHz
+0.5/–2 dB

60 dB at 400 kHz

AM tuner section
Tuning range
Models of area code CEL, CEK
With 9-kHz tuning scale:

531 – 1602 kHz

Loop antenna

450 kHz

50 dB/m (at 999 kHz)

54 dB (at 50 mV/m)

0.5% (50 mV/m, 400 Hz)

At 9 kHz: 35 dB

CEL, CEK

230 V AC, 50/60 Hz

CEL, CEK 130 W

0.3 W

430 x 56 x 288 mm

including projecting parts and controls

4.5 kg

Supplied accessories (STR-SL40)
FM wire antenna (1)
AM loop antenna (1)
Remote commander RM-U40 (1)
R6 (size-AA) batteries (2)
Speakers plugs (5)
Hexagon wrench (1)

Design and specifications are subject to change without notice.

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.)

Unleaded solder has the following characteristics.
• 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 solder joint 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!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur
such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

COMPONENTS IDENTIFIED BY MARK 0  OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY.

Specifications ............................................................................  1

...................................................................... 3

................................................................. 4

3-1.   IC Pin Function Descriptions .................................. 6
3-2.   Block Diagrams – Main Section – ........................ 10
         Block Diagrams – Display/Power Section – ......... 11
3-3.   Printed Wiring Boards
         – Digital Section (Side A)– ................................... 12
         Printed Wiring Boards

                   – Digital Section (Side B)– ................................... 13

3-4.   Schematic Diagram – Digital Section (1/3)– ........ 14
3-5.   Schematic Diagram – Digital Section (2/3)– ........ 15
3-6.   Schematic Diagram – Digital Section (3/3)– ........ 16
3-7.   Printed Wiring Boards – Main Section– ............... 17
3-8.   Schematic Diagram – Main Section (1/2)– .......... 18
3-9.   Schematic Diagram – Main Section (2/2)– .......... 19
3-10. Printed Wiring Boards – Display Section– ........... 20
3-11. Schematic Diagram – Display Section– ............... 21
3-12. IC Block Diagrams ................................................ 22

4-1. Front Panel Section ................................................. 23
4-2. Cabinet Section ........................................................ 24

.................................... 25