Canon NP-70 Service Manual page 49

NP-70
3-7
No. Symbol Description Function
25 D 1 Full-wave Bridge Recti-
Fier (Self-contained)
Rectification of AC line to
develop +24VDC
D2
Full-wave Bridge Recti-
fier (Self-contained)
Rectification of AC line to
develop +5 VDC
26 ~_ D Diode
Current Flow Control Device
27 _~ ZD Zener Diode Constant Voltage Device
28 ~ Q Silicon Control
Rectifier
Switching
29 ~ ~ Q Transistor Switching and Amplification
30
o
~,.
Q IC
Operational Amplifier
Differential Amplification of
minute signals
31 Q Programmable Unijunc-
tion Transistor
Switching
32 D Silicon Varistor Protection of Electronic
Components
33 ~ CdS Photoconductive Cell Sensing of Light for operation
initiating
34 ~ ^ ^
R Fixed Resistor
35
J "V !~ , ~ ~
, VR Variable Resistor
Permits Adjustments of
Time-constants
~
-
36 ~ C
Electrolytic Capacitor
© CANON INC.
Second Printing-June, 1974