Power Board Pcb Connections - Haier HRF328W2 Service Manual

SERVICE MANUAL
Model: HRF328\368
1.3 Location of main control board
The board is moved to the upside of the body.
As show in the red circle.

7-3. Power Board PCB connections

CN1 is the connector for the two sensors and the door switch. Its pins from the right to left are:
1-2: Null
3-4: Connected to defrosting temperature sensor. We can test the sensor with these two black wires. Its
resistance in normal operation is between 10.9 and 25.19kΩ (correspond to -10℃～-25℃). The
resistance at normal temperature is between 2.49 and 1.61kΩ (correspond to 20℃～30℃)
5-6: Connected to the refrigerator temperature sensor. We can test the sensor with these two white
wires. Resistance test is the same as the defrosting temperature sensor.
7-9:Null
10:Door switch signal. When the door is closed, GND and the signal wires are transform to conduction.
When the door is open, the wires are disconnected.
11: +12V
12: GND
CN2 is the connector for the LED lamp and display panel. Its pins from the left to right are
1-2: Connected to LED lamp.1 connects cathode and 2 connects anode
3-4: Null
5: OUT
6: IN
7: +5V
8: GND
CN3 is the connector for fan motor. Its pins from low to high are
1-8: Null
9: GND of the fan
10: +12V of the fan
CN4 is the connector for the power cables. Its pins from low to high are
1: Neutral line
3: Live line
5: Compressor
7-11: Null
Issue 2015-7-18
Rev.
Ref 1507S002V1
21