IBM 6400 series Maintenance Manual page 110

P61 ERROR:
FLASH NOT DETECTED
1. The printer could not find flash memory.
Check flash memory on the CMX controller board. If present, reseat the
flash SIMMs; if missing, install flash SIMMs. (See Figure 34, page 226.)
P62 ERROR:
DC PROGRAM NOT VALID
1. The printer cannot find the data controller program or the validation checksum is
corrupt.
Download the program again. If the message appears, replace all flash
memory SIMMs. (See Figure 34, page 226.)
P63 ERROR:
PROGRAM NOT COMPATIBLE
1. The printer is not compatible with the downloaded program.(The user may have
tried to load a CMX-compatible diskette in a CBO-controlled printer, or vice
versa.)
Use the correct emulation software option(s) for this model printer. If the
printer is an IBM 6404–B01, the controller is a CBO board. If the printer
is an IBM 6400, the controller is a CMX board.
P64 ERROR:
CHECKSUM WRONG <hex>
1. The printer received the complete program but the checksum did not match. The
data may have been corrupted during download.
Power off the printer. Download the program again from the beginning. If
the messages appears, replace the DRAM. (See Figure 34, page 226.)
2. Download the program using a new software diskette.
If the messages appears, replace the flash memory. (See Figure 34,
page 226.)
3. Download the program.
If the messages appears, replace the CMX controller board. Record the
message and return it with the defective board.
110 Troubleshooting