Lexmark Optra 4049 Series, Service Manual

Page: 55 / 194

Diagnostic Information 2-28
4049-XXX
J5-1 carries the pick signal for Feeder 1, J5-8 carries the pick signal
for Feeder 2, and J5-10 is +34 VDC. When the feeder is connected,
all three pins have +34 VDC. For early level machines using the
external J5/J10 adapter box, J5-8 and J5-10 are +34 VDC, J5-1 is 0
VDC, and J10-1 and J10-2 are +34 VDC. For all machines, if the J5-
10 and J10-1 voltages are incorrect replace the engine board. If the
other voltages are wrong, continue with this service check.
To test the torquers, short J5-1 (Feeder 1) or the J5-8 test point
(Feeder 2) to ground; the torquer rotates slightly and makes a noise.
Turn the power off and disconnect the feeder connector. There
should be 88 ± 10 ohms between pins 1 and 10, and between pins 8
and 10. Reconnect the feeder and make sure neither J5-1, nor the
J5-8 test point, nor the J5-10 test point has continuity to ground.
Skews or Jams: Check for worn, dirty, or damaged rolls, gears, or
envelope bucklers; obstructions in the paper path, correct paper/
envelopes properly installed; edge guides and flip doors properly
positioned; and paper load shafts installed parallel to the frame.
Gear chatter or continuous paper feed: Remove the right cover
and verify that the gear alignment marks are centered in the win-
dows of the gear plate when the torquer is in its detent position.
Refer to
“Dual Rear Feeder Gear Alignment Adjustment” on page
4-4 . Continuous feed may also be caused by a short to ground of J5-
1 (Feeder 1) or J5-8 (Feeder 2).
J17 J16
J5
J4
J1 J2
J3
1
1
1
1
1
RXD
TXD