EXP Computer C4077-90960 - Manual (Page 271)

Message Error
Log
Category/
Message
Description Recommended
Action
TRAY 4 EMPTY Status Tray 4 is empty or not lifting. Under normal
operating conditions, when Tray 4 is closed
the paper stack lifts until the paper is directly
beneath Tray 4’s feed rollers. Photosensor
flag PS34, the paper surface photosensor,
determines when the paper stack is lifted to
its feed position. Mechanically, Tray 4 lifts
when the tray is closed. When closed, a
drive gear on Tray 4 engages with the drive
mechanism located on the back-side of the
2000-Sheet Input Unit. A pilot locating pin and
bushing are present to ensure that the gear
from Tray 4 and the drive motor gear
assembly engage properly. Once engaged,
the rotating gears use a cable lift mechanism
to lift Tray 4’s paper stack.
Tray 4 is not lifting and/or makes abnormal
noises.
Tray 4 is partially lifting or not lifting at all
because paper loaded on the left side of the
tray is blocking upward movement.
Microswitch SW31 is defective or
disconnected (callout 2, Figure 7-23).
Verify the 2000-Sheet Input Tray
is present under the Paper
Handling Options of the PCL
configuration pages. To watch
Tray 4 lift, Open the transfer door.
Open and close Tray 4. With the
transfer door open, defeat the
transfer door closed photosensor
(PS35) by pushing in on the
sensor flag (callout 1, Figure
7-15). See if Tray 4 is lifting. The
white drive gear on the right-hand
side of the transfer door should
be rotating. If it is not rotating,
verify the cable connections
between Main Motor (M1), the
Tray 4 Controller PCA, and the
Tray 4 Power Supply (refer to
Figure 6-58, callout 1 and Figure
6-56, callout 1). Verify the lift
cables are not broken (refer to
Figure 7-24). Replace only the
2000-Sheet Input Tray Assembly
if the lift cables are broken. Tray 4
is not seated into the gear when
lifting. Check the white bushing
on Tray 4, which is located on a
steel locating pin. If the bushing is
cracked or broken, replace the
bushing, and replace the gear
assembly. Remove any paper
from the left side of Tray 4.
Replace the paper surface
sensing switch (SW31) located at
the center top of the 2000-Sheet
Input Unit (callout 2, Figure 7-23).
TRAY n OPEN
TRAY 4 OPEN
Status
Status
The indicated paper tray is open.
Tray 4 Open message may occur if the paper
size Adjustable Back Plate is missing or not
seated properly.
The printer will still function.
Close the tray if desired.
Reseat or replace adjustable
plate.
Table 7-5 Printer Control Panel Messages (continued)
7-34 Troubleshooting