HP 1050c Service Manual - Page 89
Replace ALL the Ink Cartridges., Replace the complete Tubes System, Replace
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Service Tests and Utilities 3 If the test passes, then the following message will appear on the front panel: INK PRESSURE SYSTEM Tests passed WARNING IF THIS TEST PASSES, DO NOT REPLACE THE TUBES SYSTEM OR THE APS. 4 If the test fails. Tubes System Failure If there is a problem with the Tubes System then the following message will appear on the front panel: INK PRESSURE SYSTEM Possible Failure on: 1. Ink Cartridge CMYK 2. Tubes 3. Electronics Module Code: 00XXXX:0000XX WARNING In this case, try one of the following: 1 Replace ALL the Ink Cartridges. 2 Replace the complete Tubes System ⇒ Page 8-53. 3 Replace the Electronics Module ⇒ Page 8-25. Only replace one component at a time and try the Service Test again before replacing another component. Using this procedure you will be able to determine exactly which component failed. APS Test Failure If there is a problem with the APS then the following message will HP DesignJets 1050C and 1055CM Printers Service Manual 4-15