Technics SU-810 - Detailed Circuit Schematics; Volume, Tone, and Power Amplifier Circuits; Speaker Switch, LED, and AC Input Circuits

SU-810 SU-810
6_ I 7 _ I _ 8 I _ 9 1 _ 10 I _11_ I _12_ I
:UIT U LED CIRCUIT
^3 _I_li_L-
■ SCHEMATIC DIAGRAM
(Parts list on page 17,18)
(This schematic diagram may be modified at any time with the
development of new technology.)
Notes:
•SI
•S101
•SI 03-1 :
•SI03-2 :
•SI03-3 :
•S301
•S501-1 :
•S501-2 :
Power switch in “on” position.
Input selector switch in “phono” position.
Tape-monitor select switch in “source/off” position,
(tape 2/on^--source/off)
Tape-monitor select switch in “source” position,
(tape 1/DAT—.-source)
Loudness switch in “off” position.
Tone control switch in “defeat” position.
Speaker (A) switch in “on” position.
Speaker (B) switch in “off” position.
Positive voltage lines.
Negative voltage lines.
Phono Signal (Lch)
Recording Signal
• Indicated voltage values are the standard values for the unit
measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard. Therefore, there may exist some
errors in the voltage values, depending on the internal impedance
of the DC circuit tester.
Important safety notice:
Components identified byA mark have special characteristics
important for safety. When replacing any of these components, use
only manufacturer’s specified parts.
Xaution!
1C and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care furing repair.
*Cover the parts boxes made of plastics with aluminum foil.
^Ground the soldering iron.
"^Put a conductive mat on the work table.
*Do not touch the legs of 1C or LSI with the fingers directly.
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