IBM Infoprint 6500-v05 Maintenance Manual page 125

Operator Panel Message
147 H/B CONTROL MODE
SEE USERS MANUAL
Table 3. Message List
Explanation
H/B = Hammer Bank. The printer
has sensor circuits that continually
sample the operating temperature
of key components of the print
mechanism. When higher than
normal temperatures are sensed
in one or more coils, print speed is
automatically reduced by 50%
and the H/B CONTROL MODE
message is sent to the LCD to
inform the operator. When the
coil(s) cool down, print speed
automatically returns to 100% and
the message clears from the LCD.
This message is normal for
extremely dense print jobs, such
as the Plot Test. If the printer often
prints at half speed, it may be
operating in a severe
environment. A severe
environment is one with an
ambient temperature at or above
40° Celsius (104° Fahrenheit) or
that is dirty enough to create
blockage of the cabinet fan vents.
The printer must never be run at
ambient temperatures greater
than 40° Celsius (104°
Fahrenheit). If the printer is
located in such an environment,
relocate it to a cooler, cleaner
area, or reduce the size and
duration of the print jobs.
Corrective Action
1. If the printer is a 1500 or 2000 lpm model set the coil temperature
(page 383).
2. Inspect the printer environment for severity. Advise the user to
move the printer to cooler, cleaner location.
3. Check the kinds of print jobs the user is running: look for very
dense graphics and layouts. Advise the user to run jobs in smaller
batches.
4. Power off and unplug the printer. Remove the paper guide
assembly or pedestal top cover. Check all fan cable connections.
5. Plug in the printer and power it on. Verify that all fans operate.
Replace any fan that does not operate.
6. Inspect vents and fan airways for obstructions. Look underneath
cabinet models for items blocking the cabinet exhaust vents.
Remove any obstructions from vents and airways.
7. Check the shuttle for electrical shorts (page 252).
8. Install the paper guide assembly or pedestal top cover. Load
paper. Run the "All E's" print test for 5 to 10 minutes. If the
message appears, replace the shuttle frame assembly. If the
printer is a 1500 or 2000 lpm model set the coil temperature (page
383).
9. Run the "All E's" print test for 5 to 10 minutes. If the problem
reappears, the controller board or microcode is suspect. Do the
following:
10. Save the printer configuration values. (Refer to the User's
Manual .)
11. Clear NVRAM (page 237).
12. Download and install the latest code from IBM First (page 231).
Display Messages
125