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This circuit is to generate the base clock for calculating time and the synchro clock for transmitting data from and to the
inside logic elements of the IC1(MICOM).  Be sure to use the authentic parts since the calculating time by the IC1 may be
changed or it will not work if the OSC1 SPEC is changed.

The RESET circuit is for allowing all the functions to start at the initial conditions by initializing various parts including the
RAM inside the MICOM (IC1) when the power is initially supplied or the power supply to the MICOM is restored after a
momentary power failure.  For the initial 10ms of power supply, ‘LOW’ voltage is applied to the MICOM RESET terminal.
During a normal operation, 5V is applied to the RESET terminal. (If a trouble occurs in the RESET IC, the MICOM will not
work.)

- 20 -

- 21 -

Load Type

Defrosting Heater

Refrigerator Fan

Measurement Location(IC5)

No.13

No.10

No.12

ON

1V or below

Condition

OFF

12V

Comp,

Freezer Fan Motor

The upper CIRCUIT reads REFRIGERATOR temperature and DEF-SENSOR temperature for defrosting into MICOM.
OPENING or SHORT state of each TEMPERATURE SENSOR are as follows.

- 22 -

Refrigerator Sensor

POINT

Voltage

0.5 V ~ 4.5 V

0 V

5 V

Defrosting Sensor

POINT

Voltage

A

B

Freezer / Refrigerator Door

CLOSED

OPEN

5 V

0 V

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➧

Table of Temperature Compensation by adjusting the resistance (Difference with the current temperature)

E.g.) If the refrigerator compensation resistance (RCR1) is changed from 10K (the current resistance) to 18K 

(the adjustment resistance), the temperature of the refrigerator rises +1 °C.

180 K

Ω

+2.5 °C

Compensation by

56 K

Ω

+2.0 °C

raising the 

33 K

Ω

+1.5°C

temperature

18 K

Ω

+1.0 °C

12 K

Ω

+0.5 °C

10 K

Ω

0 °C

Standard Temperature

8.2 K

Ω

-0.5°C

Compensation by

5.6 K

Ω

-1.0°C

lowering the

3.3 K

Ω

-1.5 °C

temperature

2 K

Ω

-2.0 °C

470 

Ω

-2.5 °C