KERN HFD Service Manual page 3

10.4 Electrical Test: ................................................................................................................................. 23
10.5 Testing PCB Voltages ..................................................................................................................... 24
10.6 AC Power ......................................................................................................................................... 24
10.7 Adaptor Voltage .............................................................................................................................. 24
10.8 PCB Input Voltage ........................................................................................................................... 24
10.9 Check Battery Voltage and Charging Voltage .............................................................................. 24
10.10 Replace Main Board ................................................................................................................... 25
10.11 Battery Replacement .................................................................................................................. 26
11 Trouble Shooting ................................................................................................. 27
12 Error messages ................................................................................................... 28
13 Drawing ................................................................................................................ 30
14 Circuit Diagram .................................................................................................... 32
14.1 AD ..................................................................................................................................................... 32
14.2 COM.................................................................................................................................................. 32
14.3 DIS .................................................................................................................................................... 33
14.4 MCU .................................................................................................................................................. 34
14.5 POWER ............................................................................................................................................ 34
15 Maintenance, Repair, Cleaning and Disposal ................................................... 35
15.1 Cleaning and Disposal ................................................................................................................... 35
15.2 Regular maintenance and care ..................................................................................................... 35
15.3 Regular maintenance: .................................................................................................................... 37
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HFD-SH-e-1810