Notes Of Schematic Diagram - Panasonic SA-PM21PC Service Manual

SA-PM21PC

17 Notes of Schematic Diagram

(All schematic diagrams may be modified at any time with
the development of new technology)
Note :
S701 Reset switch
S780 Open switch
S900 CD switch
S901 Tape switch
S902 Tuner/Band switch
S903 FF switch
S904 Stop switch
S905 REW switch
S906 Album_FF switch
S907 Album_REW switch
S908 AC In switch
S909 Open/Close switch
S911 Surround switch
S912 Sound switch
S913 Rec switch
S914 Track_Up switch
S915 Track_Down switch
S971 Mode switch
S972 Half switch
S973 CR02 switch
S975 Recinh_F switch
S1000 Tape Eject switch
VR900 Volume VR
· 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.
· Importance safety notice :
Components identified
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 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.
by mark have special
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