Panasonic SA-VK31GC, Service Manual

Page: 52 / 116

(All schematic diagrams may be modified at any time with the
development of the new technology)
Note:
SW1 : Push switch
SW2 : Push switch
SW3 : Open switch
SW4 : CD switch
SW5 : Load switch
SW2800 : PAL/NTSC switch
S601 : Power switch
S602 : Deck 1/2 switch
S603 : Rec switch
S604 : Open/ Close switch
S605 : CD 1 switch
S606 : CD 2 switch
S607 : CD 3 switch
S608 : CD 4 switch
S609 : CD 5 switch
S610 : SSEQ switch
S611 : SEQ switch
S901 : REW switch
S902 : Tuner switch
S903 : CD Play switch
S904 : FF switch
S905 : Stop switch
S906 : Deck 2 Open switch
S907 : Tape switch
S908 : AUX switch
S909 : Deck 1 Open switch
S910 : Display switch
S950 : Voltage Selector switch
S951 : Mode switch
S952 : Half switch
S971 : Mode switch
S972 : Half switch
S974 : Recinh_R switch
S975 : Recinh_F switch
S7201 : Rest switch
VR600 : VR Volume Jog
VR602 : MIC Volume Jog
·
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 waveformsdepending upon the internal impedance of
the tester or the measuring unit.
No mark : Playback << >> : Rec < > : FM
(( )) : CD
· Importance safety notice :
Components identified by 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. Whenreplacing any of components, 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.
· Cover the parts boxes made of plastics with aluminium foil.
· Put a conductive mat on the work table.
·
Ground the soldering iron.
· Do not touch the pins of IC, LSI or VLSI with fingers directly.
18 Schematic Diagram
52
SA-VK31GC / SA-VK31GS
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