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7. Circuit board diagram
Circuit board diagrams and check points
12.6 V
(JT-33P: C125)
Circuit thermostat characteristics (JT-33M: IC1 7P and JT-33P: IC1 8P)
Temperature
Power supply voltage: 220 to 240 V AC
(JT-30P: Between TAB1 and TAB2)
IC1 7P and 8P Voltage
20°C
3.44 V
40°C
2.38 V
60°C
1.47 V
5 V
(JT-33M: CN2 4P)
─ 7 ─
Reset input
5 V
(JT-33M: IC1 11P)
Clock frequency
8 MHz
(JT-33M: IC1 15P)
0 V
(JT-33M: CN2 7P)
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