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CIRCUIT for occurring CLOCK which motivates the internal local element of IC1 to transmit and receive an information and
BASIC TIME for calculating time. Use a proper form for OSC 1. Because in case that SPECIFICATION is changed, the
calculated time in IC1 is changed or IC1 isn't able to operate.

All the internal parts of MICOM(IC1) return to the initial condition when the early power ON or apply power again in MICOM
after temporary power failure. As a result, all the functions operate according to the early condition. At the early period of
power ON the "LOW" voltage is applied in the RESET terminal of MICOM for the fixed time. The RESET terminal is 5V
during the general operation.

- 29 -

u

BEST

u

GOOD/BETTER

u

BEST

u

GOOD/BETTER

(1) LOAD OPERATION CHECK

- 30 -

u

BEST

u

GOOD/BETTER

u

BEST

u

GOOD/BETTER

LOAD

COMP

FAN 

DEFROST 

LAMP

DISPENSER

TCM

HEATER

HEATER(OPTION)

(OPTION)

MEASURING POINT (IC6)

NO.15

NO.13

NO.12

NO.11

NO.14

NO.16

ON

Below 1V

STATE

OFF

12V

LOAD

COMP

FAN 

DEFROST

LAMP

DISPENSER

HEATER

HEATER(OPTION)

MEASURING POINT (IC4)

NO.15

NO.14 

NO.13

NO.11

NO.16

ON

Below 1V

STATE

OFF

12V

(2) DOOR OPENING PERCEPTION CHECK

- 31 -

u

BEST

u

GOOD/BETTER

MEASURING POINT

NO.38 OF IC 1 (MICOM)

REFRIGERATOR DOOR

CLOSE

5V(S/W of  A  ,  B  is OFF state)

OPEN

0V(S/W of  A  ,  B  is ON state)

(3)BUZZER OPERATION CHECK

NOTE) In the cuse of Best model, BUZZER is in the LCD [Refer to DISPLAY CIRCUIT].

- 32 -

Tone(Beep~) when the button 

Alam for open door

on the display is pushed

(beep-beep-beep)

OFF

IC1 (  A  )

5V

IC1 (  B  )

0V

MEASUREMENT
LOCATION

CONDITION

0.1s

0.5s

0V

5V

0V

5V

1.9kHz(Beep~)

0.5s

0.5s

0V

5V

0V

5V

1.9kHz(Beep~)

OFF

u

GOOD/BETTER