Faulty Ros Assembly - Star Micronics WinType 4000 Technical Manual

3.4 Faulty ROS Assembly

Step
1 (Initial Check)
Are any parts broken, malformed, incorrectly installed
or different from those listed in the specifications?
• Principle Parts to be Checked:
(1) ROS assembly, (2) MCU PWB
(3) Harness assembly ROS, (4) LVPS assembly
2 (Check that power is supplied to the LD assembly in
the ROS assembly.) *1
Is a voltage of 5VDC supplied between P/J12-
1PIN↔P/J12-3PIN?
3 (Check that power is supplied to the SOS PWB in the
ROS assembly.) *1
Is a voltage of 5VDC supplied between P/J12-
10PIN↔P/J12-8PIN?
4 (Check that the MCU PWB has been properly re-
placed.)
Does the problem recur after the MCU PWB has been
replaced?
5 (Check the ROS harness assembly.) *1
Is there continuity between J12↔J121, J12↔J122
and J12↔J123?
*1: Be sure the EP toner cartridge is installed and the front cover assembly is securely closed.
Caution: If a U2 error occurs even though the ROS assembly has been replaced, follow the troubleshooting
procedure described in section 3.16 Noise.
Check
– 133 –
TROUBLESHOOTING
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
See step 4.
See step 5.
Replace the ROS
assembly.
NO
See step 2.
See section 3.1
Faulty LVPS
Assembly 5VDC.
See section 3.1
Faulty LVPS
Assembly 5VDC.
Countermeasure is
completed.
Replace the ROS
harness assembly.