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Troubleshooting
4-7
NovaJet 800 Series Service Manual
Symptoms Possible cause Solution
Table 4-1. Troubleshooting Table (cont).
Internal ERROR
“MPCB Failure”
• bad MPWA replace MPWA
Unrecognized
Cartridges Error
• faulty connection check cartridges
of cartridge ID
chip to flex cable
• wrong cartridges check cartridges
installed
• incorrect MB verify MB version
version (MB 87-27-0) and
replace MPWA if
-27-0 is not displayed.
• carriage flex check flex driver
cable disconnected cable connections
• trailing cable reseat trailing
connections cable
• faulty trailing replace trailing
cable assembly cable assembly
• faulty carriage replace carriage
PWA PWA (ensure both
boards are the same
version)