Star Micronics WinType 4000, Technical Manual

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TROUBLESHOOTING
3.3 Faulty Scanner Assembly
Step Check
Remedy
YES NO
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) ROS harness assembly, (4) LVPS assembly
2 (Check that power is supplied to the scanner assem-
bly.) *1
Is a voltage of 24VDC supplied between P/J12-
15PIN
↔
P/J12-14PIN?
3 (Check the ON signal for the scanner motor.) *1
Is the voltage 0VDC between P/J12-13PIN
↔
P/J12-
8PIN when test print mode is entered, and is the
voltage 4.1VDC after a U2 error occurs?
4 (Check the ON signal for the scanner motor.) *1
Is a voltage of 4.1VDC supplied between P/J12-
13PIN
↔
P/J12-8PIN when the power is turned ON?
5 (Check the ROS harness assembly.) *1
Is there continuity between J12
↔
J122?
*1: Be sure the EP toner cartridge is installed and the front cover assembly is securely closed.
Replace the part or
install the part
correctly.
See step 2.
See step 3.
See section 3.2
Faulty LVPS
Assembly 24VDC.
Replace the ROS
assembly.
See step 4.
Replace the MCU
PWB.
See step 5.
Replace the ROS
assembly.
Replace the ROS
harness assembly.