IBM 6400 Maintenance Information Manual page 100

Chapter 5
Troubleshooting Display Messages
Operator Panel
Message
BOOT DIAGNOSTICS
CLEARING PROGRAM
FROM FLASH
DRIVER CIRCUIT BAD
ENERGY SAVER
MODE ACTIVE
ERROR: DRAM AT
ADDRESS <hex>
ERROR: DRAM NOT
DETECTED
100
Table 4. Message List
Explanation
Non-error status No action required.
message.
Status message: No action required.
emulation software
successfully loaded
into printer RAM and
the checksum
matched. The old
program is now being
deleted from flash
memory.
The hammer coil 1. Cycle power. If the message appears,
count test failed.
2. Power off the printer. Remove the shuttle
Status message: the No action required.
printer is in low-
energy idle state, all
fans and higher
voltages are off, only
+5Vdc logic circuits
are active.
The printer found a 1. Replace the DRAM.
defective memory
2. Power on the printer. If the message
location.
DRAM is defective or 1. Check DRAM on the CMX controller
missing.
2. Power on the printer. If the message
3. Power on the printer. If the message
Corrective Action
press Stop.
cover. At the shuttle frame assembly,
disconnect the hammer bank logic and
power cables. Power on the printer. If
"HB NOT INSTALLD" appears on the
LCD, replace the shuttle frame assembly.
If "HB NOT INSTALLD" does not appear
on the LCD, replace the CMX controller
board.
appears, replace the CMX controller
board. Record the message and return it
with the defective board.
board. If present, reseat DRAM; if
missing, install DRAM.
appears, replace the DRAM.
appears, replace the CMX controller
board. Record the message and return it
with the defective board.