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Troubleshooting 4-27
NovaJet 800 Series Service Manual
Figure 4-14. Service Station.
If failures are occurring within 40 ml of ink throughput, improper
cleaning of electrical contacts on carrier or a connectivity problem
probably exists. Driver chips on the carriage PCB are known to
have blown multiple cartridges in a row and vice versa. Some
cartridges can affect other cartridges via the flex driver cable
connectivity. Use post-it note trick (attach a post-it note to the
electrical contacts on rear side of print head or cartridge, but do not
cover the two identification circuit chip contacts) to diagnose the
defective cartridge in these cases:
Figure 4-15. Defective Cartridge Power Lines.
Initially cartridges should be replaced, but further investigation is
required.