Faulty Drive Assembly - Star Micronics WinType 4000 Technical Manual

TROUBLESHOOTING

3.12 Faulty Drive Assembly

Step
1 (Initial Check)
Are any parts dirty, broken, malformed, incorrectly
installed or different from those listed in the specifica-
tions?
• Principle Parts to be Checked:
(1) Drive assembly, (2) MCU PWB
(3) LVPS assembly, (4) Feeder assembly
(5) EP toner cartridge, (6) Fuser assembly
2 (Check the drive assembly.) *1
Does the drive assembly rotate smoothly when it is
removed and the hand crank is turned?
• Rotate the gear installed on the left, on the main
motor's axle, clockwise by hand to determine
whether the drive assembly rotates smoothly.
3 (Check the feed roller assembly.) *1
Does the feed roller assembly rotate smoothly when it
is removed, the feed solenoid is running and the hand
crank is turned?
• Rotate the gear installed at the left
counterclockwise by hand to determine whether the
drive assembly rotates smoothly.
4 (Check that power is supplied to the main motor.) *2
Is a voltage of 24VDC supplied between P/J14-1PIN
↔P/J11-7PIN and between P/J14-2PIN↔P/J11-
7PIN?
5 (Check the main motor.) *2
Is there continuity (approx. 15Ω) between the follow-
ing pins:
J14-1PIN↔J14-3PIN,
J14-1PIN↔J14-5PIN,
J14-2PIN↔J14-4PIN,
J14-2PIN↔J14-6PIN?
6 (Check that the MCU PWB has been properly re-
placed.)
Does the problem recur after the MCU PWB has been
replaced?
*1: The gear installed on the left, on the main motor's axle, should always be rotated clockwise.
Caution: The gear on the main motor's axle should never be rotated counterclockwise.
*2: Be sure the EP toner cartridge is installed and the front cover assembly is securely closed.
Check
– 142 –
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
See step 4.
See step 5.
See step 6.
See step 7.
NO
See step 2.
Replace the drive
assembly.
Replace the feed
roller assembly.
See section 3.2
Faulty LVPS
Assembly 24VDC.
Replace the drive
assembly.
Countermeasure is
completed.