Self Test Is Not Normal - Samsung SRP-275 Service Manual

E. Self test is not normal
E
Does not printer
operate at all?
NO
Printing is carried out, but print
quality is deficient or paper feeding is
not normal
Replace printer
mechanism ass'y
OK?
NO
Replace PCB-main ass'y
END
(*1)
Check point
+terminal of C51
+terminal of C55
Rev. 2.00
YES
Is output voltage of
regulator on PCB-main
within SPEC?(*1)
Replace printer
mechanism ass'y
YES
END
Rating
+24V
+5V
- 121 -
YES
NO
END
SRP-275
NO
Replace PCB-main ass'y
OK?
YES
END