Schematic Diagram Notes; Type Illustration Of Ic's, Transistors And Diodes - Technics SL-HD301 Service Manual
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Also See for SL-HD301:
- Operating instructions manual (37 pages) ,
- Service manual (35 pages) ,
- Service manual (104 pages)
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SL-HD301 / SL-HD501
9 Schematic Diagram Notes
9.1.
Scheamtic Diagram Notes
This schematic diagram may be modified at any time with the
Important safety notice:
development of new technology.
Components identified by A\ mark have special
characteristics important for safety.
Notes:
Furthermore, special parts which have purpose of
e S701 : Rest position detect switch.
fire-retardant
(resistors),
high-quality
sound
(capacitors),
low-noise
(resistors), etc. are used.
$790 :C
itch.
.
Ey Sey: openewito
When replacing any of components, be sure to use
¢ S791 : CD tray close switch.
only manufacture's specified parts shown in the
e S801 : Stop (fH) switch.
parts list.
e $802 : Play (> ) switch.
Caution!
e S803 : Pause (ff) switch.
iC and LSI are sensitive to static electricity.
e S804 : CD tray open/close (4 OPEN/CLOSE)
Secondary trouble can be prevented
by taking
switch.
care during repair.
e S805 : F. skip/ search ( >> / PP) switch
Cover the parts boxes made of plastics with
e S806 : R. skip/ search (H@<q / <q) switch.
aluminum foil.
e S807 : CD text select (CD TEXT) switch.
Ground the soldering iron.
e S808 : Al edit (Al EDIT) switch.
Put a conductive mat on the work table.
e $809 : Scroll (SCROLL) switch.
Do not touch the legs of IC or LS! with the fingers
e Indicated voltage values are the standard values for
directly.
the unit measured by the DC electronic circuit tester
Voltage and signal line
(high-impedance)
with
the
chassis
taken
as
=p==
=: Positive voltage line
standard. Therefore, there may exist some errors in
<>
: CD signal line
the voltage
values,
depending
on
the _ internal
impedance of the DC circuit tester.
No mark: CD STOP
(): CD play [1kHz, L+R, 0dB]
9.2.
Type Illustration of IC's, Transistors and Diodes
LC66358C4K97
MN662790RSA
TA7291S
AN8739SBE2
TC74HCT7007A
AN8839NSBE2
24
LM2940T5SM
UPC29M33T
TOTX178
2SB709STX
é
28C4081STX
SP
DTA143XUT106
LE
DTC114YUT106
' A
DTC143EUT106
DTC143XUA106
MA8082MTX
MA8039LTX
Cathode
A
SPR-30SMDTF
Anode
A_
Cathode Anode
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