Oscillator Circuit; Buzzer Circuit - Sanyo SBM-20 Service Manual

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6)
7)
Control circuit for inner temperature
Circuit diagram
21
,
TH1
TR5
24
25
23
R14
TR2
()
C3
C8
+
18
42
IC3
I
VDD
P21
P20
P22
PI l/lNTl
Vss
Description of operation
(1) The circuit controls the inner temperature during the timer setting and start of operation.
Oscillator circuit
+Circuit diagram
xl
------- . . . . . .
1
8) Buzzer circuit
Circuit diagram
5
n;
4
d
.>
42
x2
ICI
xl
Vss
POWER SUPPLY UNIT
<
:
>
CONTROL
UNIT
21
R20
+
}
: RI
22
TRI
VDD
ICI
P231BZR
Vss
-

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