Technics SH-AC500D

SH-AC5OOD |
Wi Schematic Diagram
Page Page
PY
MAIN
CIRCUIT
ue
8627
[3]
POWER
SWITCH
CIRCUIT...........0....00.
30
[EB]
DISPLAY
CIRCUIT
uo...
25
DIGITAL
INPUT
CIRCUIT
.........0...0
ee
30
VOLUME
CIRCUIT
..........cccscecsseesseeeeees
30
[fe]
SUB-TRANSFORMER
CIRCUIT
..............
27
BP) CONTROL CIRCUIT... 30 {) AC-3 MODULE UNIT CIRCUIT ............. 28 ~ 29
(All schematic diagrams may be modified at any time with the development of new technology)
Note :
° $701 : Power switch °e $906 : DTS switch
° $901 : Digital 1 ° $907 : Stereo switch
e $902 : Digital 2 ° $908 : Channel select switch
e $903 : Digital 3 e $909 : Speaker select switch
e $904 : Line switch e VR901 : Volume control
e $905 : Surround switch
e Signal line
: +B line —=<-== : -Bline ka> : Main signal line
e The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high impedance) and
oscilloscope on the basis of chassis.
Accordingly, there may arise some error in voltage values and waveforms depending upon the internal impedance of the tester or the
measuring unit.
e Importance safety notice:
Components identified by A\ mark have special characteristics important for safety. Furthermore, special parts which have purposes
of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of componenis,
be sure to use only manufacturer's specified parts shown in the parts list.
Caution !
IC, LSI and VLSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
e Cover the parts boxes made of plastics with aluminium foil.
e Ground the soldering iron.
e Do not touch the pins of IC, LSI or VLSI with fingers directly.
e Put a conductive mat on the work table.
= DA