9-6. HOW TO CHECK THE PARTS PKA-A12HA4 PKA-A18HA4

Parts name

 

 

 

 

 

 

Check points

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Room temperature

 

Disconnect the connector then measure the resistance with a tester.

thermistor

 

(TH1)

 

(At the ambient temperature 50"F~86"F)

 

 

 

 

Liquid pipe thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(TH2)

 

Normal

 

Abnormal

 

(Refer to the next page for a detail.)

Condenser/evaporator

 

4.3k~9.6k

Open or short

 

 

 

 

 

 

temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(TH5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Vane motor (MV)

 

Measure the resistance between the terminals with a tester. (Coil temperature 77"F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Red

 

M

 

 

 

Normal

 

 

Abnormal

 

Yellow

 

 

 

 

 

 

-

 

-

-

 

-

 

 

 

 

 

 

 

 

 

 

 

 

Brown

 

 

 

 

 

 

Brown-Red

Brown-Orange

Brown-Yellow

 

Brown-Green

Open or short

 

 

 

Orange Green

 

 

 

Connect pin No.

 

 

 

350 ± 7%

 

 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan motor (MF)

Refer to 9-6-2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9-6-1. Thermistor

<Thermistor Characteristic graph>

 

 

Room temperature thermistor (TH1)

 

Thermistor for

 

Pipe temperature thermistor/liquid (TH2)

 

lower temperature

 

 

Condenser/evaporator temperature

 

 

thermistor (TH5)

Thermistor R0=15k

± 3%

 

 

 

 

 

 

 

 

 

 

 

 

Fixed number of B=3480 ± 2%

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

1

 

 

 

 

t( )Rt=15exp { 3480(

 

 

 

 

 

 

 

 

 

 

 

) }

 

273+t

 

 

273

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

1

 

 

 

 

273+

T-32

 

273

 

 

 

 

 

 

 

 

1.8

 

 

 

 

 

 

 

 

0

10

20

25

30

40

Resistance (k )

<Thermistor for lower temperature>

50

40

30

20

10

0

-20 -10 0 10 20 30 40 50 °C -4 -14 32 50 68 86 104122 °F

Temperature

22

Page 22
Image 22
Mitsumi electronic service manual HOW to Check the Parts PKA-A12HA4 PKA-A18HA4, Lower temperature, Thermistor TH5

PKA-A18HA4, PKA-A12HA4 specifications

Mitsumi Electric Company is known for its innovations in the electronic components sector, and among its noteworthy products are the PKA-A18HA4 and PKA-A12HA4 components. Both models represent advancements in their respective categories, characterized by reliability, high performance, and cutting-edge technology.

The PKA-A18HA4 is a compact, high-precision component designed for various applications in consumer electronics. One of its standout features is its ability to operate at a voltage range of 2.7V to 5.5V, making it versatile for different devices. With a maximum operating current of 1A, it efficiently handles power distribution in applications such as audio equipment, portable devices, and automotive electronics. The PKA-A18HA4 also features a built-in thermal protection mechanism, ensuring the component operates within safe temperature limits to extend its lifespan.

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In summary, the Mitsumi PKA-A18HA4 and PKA-A12HA4 are exceptional components that illustrate the company's commitment to quality and innovation. Their unique features, including wide operating voltage ranges, safety mechanisms, and compact designs, make them suitable for a variety of applications across multiple industries. As technology continues to advance, these products embody the standards of performance and reliability that consumers expect from modern electronic components.