Sharp KS-COM18 - EXPLANATION OF CIRCUIT; BLOCK DIAGRAM

EXPLANATION OF CIRCUIT
BLOCK DIAGRAM
VDD Power supply
circuit
11
VR Power supply
circuit
CONTROL UNIT
Power supply frequency
SYNC signal generating
circuit
Model change
Cooking heater drive
circuit
Warming heater
drive circuit
VREF Power supply
and detector circuit
Temp. detector circuit
TH1
Room temperature thermistor
Thermistor plate ass’y
Display
User interface circuit
Thermistor
temperature (
o
C)
Thermistor resistance
(kΩ)
TH1
TH Plate
-5.0
0.0
20.0
30.0
50.0
60.0
66.0
68.0
70.0
75.0
100.0
125.0
45.74
34.70
12.61
8.00
3.51
2.42
1.71
1.45
0.680
205.6
159.2
61.48
39.72
17.72
12.20
9.83
9.16
8.55
7.20
3.23
1.58
MODEL NAME
MODEL CHANGE
KS-COM18
R72
10k
OPEN
R73