IBM 6400 Maintenance Information Manual page 124

Chapter 5
Troubleshooting Other Symptoms
Symptom
Downloads consistently
fail
Flash SIMM won't copy
124
Table 5. General Symptom List
Corrective Action
Printer Operation
NOTE: Most download problems are detected by software during
the procedure and communicated by LCD messages. If
downloads fail consistently with no messages or with erratic
messages, suspect a hardware failure.
1. Power off the printer. Remove the paper guide assembly or
pedestal top cover. Check the I/O cable connections from the
host to the printer. Check the parallel cable connection at J112
on the CMX controller board. Inspect all cables for damaged,
bent, broken, or burnt pins. Replace any damaged cables.
Reconnect all I/O cables; make sure all connections are clean
and tight.
2. Remove the flash SIMMs. Inspect the flash SIMM sockets on the
CMX controller board. If any socket pins are bent or damaged,
replace the CMX controller board.
3. Check that customer has the right size SIMMs for the emulation.
(See Figure 35, page 220.) Install SIMMs that support the
emulation software.
4. Power up the printer. Download the emulation. If the download
fails, activate the Boot Diagnostics Menu (page 137) and run
MISC UTILITIES / RUN MEMORY TESTS. If memory fails test,
replace the DRAM. If memory tests OK, replace the flash
memory with pre-written flash. (See Table 8 and Table 9 on
page 219 and Figure 35 on page 220.)
5. Power up the printer. Download the emulation. If the download
fails, replace the CMX controller board.
1. Power off the printer. Remove the flash SIMMs. Inspect the flash
SIMM sockets on the CMX controller board. If any SIMM socket
pins are bent or damaged, replace the CMX controller board.
2. Make sure the blank SIMM is the same size as the SIMM to be
copied. Install the SIMMs, making sure they are fully and
correctly seated. Power on the printer. From the Boot
Diagnostics menu, select and run MISC UTILITIES / COPY
FLASH SIMMS. (See page 137.) If the DESTINATION NOT
DETECTED message appears, the blank SIMM is not a type
supported by the boot code on the original SIMM. If SOURCE
LARGER THAN DESTINATION appears, the blank SIMM is not
large enough to contain the code on the original SIMM. If the
SIMM does not copy or the ERROR WRITING TO FLASH
message appears, replace the blank SIMM.
3. Power on the printer. From the Boot Diagnostics menu, select
and run MISC UTILITIES / COPY FLASH SIMMS. If the new
SIMM does not copy, replace the CMX controller board.