3. CHECKING COMPONENTS
4. INDUCTANCE
Familiar error:
1）Sound abnormality
2）Insulation resistance disqualification.
5. STEP MOTOR
5
4
2
1
Test in resistance.
TOOL: Multimeter.
Test the resistance of winding. The stepper motor fails if the resistance of winding is 0
(short circuit) or ∞（open circuit）.
6. F U SE
Checking continuity of fuse on PCB ASS’Y.
Remove the PCB ASS’Y from the electrical component box. Then pull out the fuse from the PCB
ASS’Y (Fig.1)
Fuse
PCB Ass'
Y
Fig.
1
Check for continuity by a multimeter as shown in Fig.2.
Fuse
Fig.
2
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