Sanyo SBM-201 - Control Panel Settings & Features; Digital Display; Time-Delay Feature; LED Operation Light

4. Operational Principles
1) Operation procedures
Refer to the separate instruction manual.
2) Block diagram
Power
transformer
Power circuit
m------
I I 7
+
Heater control
k!------] ::::i~’m’ I___
I
I
I
I
3) Power circuit
=ircuit diagram
----J
Icl
Indicator circuit
=
-
---EEcl
1
POWERSUPPLYUNIT
(
)
CONTROLUNIT
1
I
Iclol
IN
OUT
I 1
21 VDD
I
T T T
I
T
l-pi
G
+ +
T
C106 Clul
I
bl
I
I
I
Vllul 1 ]D101-D1o4,
L
1
I 1 t 1
f
“q Vss
I
I
+oltage at each point (Ground is shown as Vss)
I
I
@
13V @ 5V
●Description of operation
(1)
VDD-VSS Power supply (5V)
The secondary output of power transformer(PT101 ) is given bridge-rectification by the diode
(D101 -D104) and the condenser (C107) to produce 13V voltage at@. The voltage at@is used to
compose@ 5V power supply by the operation of constant voltage circuit consisting of 3-terminal
output voltage regulator (ICI 01).
5