SERVICE MANUAL
Model: HRF328\368
21
Issue 2015-7-18
Rev.
Ref 1507S002V1
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 25.19k
Ω
(correspond to -10
℃～
-25
℃
). The
resistance at normal temperature is between 2.49 and 1.61k
Ω
(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
