IBM 6400 Maintenance Information Manual page 116

Chapter 5
Troubleshooting Other Symptoms
Symptom
Printer does not detect
presence of power
stacker
-or-
Stacker not working
116
Table 5. General Symptom List
Corrective Action
Power Stacker
1. Check that the power stacker is enabled under the Printer
Control menu. (Refer to the Setup Guide.) If the power stacker
enable/disable option does not appear in the menu, go to the
next step.
2. Open the rear cabinet door. Check that the ON/OFF indicator
lamp is lit. If the ON/OFF indicator is not lit, go to step 3. If the
ON/OFF indicator is lit, press the ONLINE key and check that
the ONLINE indicator lights. If the ONLINE indicator comes on,
the stacker is detected by the printer. If the ONLINE indicator
does not come on, go to step 4.
3. a) Power off the printer.
b) Unfasten the cable clamp holding the stacker control panel
cables.
c) Disconnect the stacker power cable from the back of the
stacker control panel. (See Figure 68, page 376.)
d) Locate pin 1 of connector P106. (See the cable assembly
drawing in Appendix A, page 320.)
e) Power on the printer.
f) At connector P106 check for +48 volts DC between pins 1 and
2 and +5 volts DC between pins 3 and 4.
If the voltages are correct, replace the stacker control panel. If
the voltages are not correct, power off the printer, remove the
paper guide assembly, and disconnect the stacker power cable
from the CMX controller board. (See Figure 73, page 381.)
Check the continuity of the stacker power cable between P105
and P106. If the cable fails the continuity test, replace it. If the
cable is OK, replace the CMX controller board.
4. Power off the printer. Remove the paper guide assembly.
Disconnect stacker cables from the CMX controller board,
stacker assembly, and the stacker control panel (see Figure 68,
page 376). Check cables for cuts, breaks, or damaged pins.
Check continuity of cables. (See Appendix A.) Replace any
cable that is damaged or fails continuity test. Reconnect all
stacker cables to the CMX controller board, stacker, and stacker
control panel.
5. Power on the printer. Check that the ONLINE indicator lights on
the stacker control panel. If the ONLINE indicator does not light,
replace the stacker control panel.
6. Power on the printer. Check that the ONLINE indicator lights on
the stacker control panel. If the ONLINE indicator does not light,
replace the CMX controller board.