chap04.pdf part of HP Designjet about.pdf, This is the service manual for designjet models 250,330, and 350C. text manual preview

Text preview for : chap04.pdf part of HP Designjet This is the service manual for designjet models 250,330, and 350C.

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4

Preventive Maintenance

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Moisture on Plotter
Users should use the plotter in an environment between 5% and 95% relative humidity. To recover from moisture condensation, turn the plotter off, and, using the main roller as a reference, wait until the plotter is completely dry before using it again. (Other environmental specifications ' chapter 2.)

Level of Plotter Usage
To achieve good performance and long lifetime of the HP DesignJet 230/250C and HP DesignJet 330/350C plotters, users should limit use to the following recommendations (duty cycle): Average number of plots per day
10 E/A0 CAD plots

Maximum number of plots per day
20 E/A0 CAD plots

The service configuration plot gives an indication of how much the plotter has been used: number of plots, number of cartridges, number of times the plotter has been turned on. (Details ' page 8 49/8 50.)

Friction on Slider Rod
The carriage bushings are made of a porous composite material. Oil stays inside them by means of capillary action. Never place the bushings on an absorbant material. To prevent friction of the bushings on the slider rod, remove dirt from the slider rod and chassis beam. Apply oil (Anderol 4068, HP part number: 6040 0858) to the slider rod ( 3 drops) and to the bushings if they are running dry.

Noisy Carriage Wheel
To prevent noisy movement of the carriage, remove aluminum or dust particles from the wheel at the back of the carriage, and from the slider path along which the wheel moves.

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Preventive Maintenance

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Ink Spilling
The service configuration plot gives an estimation of the amount of ink in the plotter's spittoon. (Details ' page 8 49 or 8 50.) To prevent ink spilling, replace both the spittoon and the ink separator when the spittoon is almost full. About 880 primes are needed to fill up the ink separator. Note that if you clear the EEROM or replace the electronics module, the factory spittoon value is reset to 0% used. Keep in mind that the value printed on the service configuration plot may greatly underestimate the amount of ink in the spittoon. Future PC based plotter diagnostics will enable you to download information from the old EEROM and upload it to the new EEROM.

Belt Swelling
To prevent new belts from swelling incorrectly, keep them in their bags with dissicant until you need to install them.

Cleaning the Roll feed Assembly
Always clean the rubber diverter of the roll feed assembly with a dry cloth. Never clean it with water or alcohol based substances.

C4699 90000

Preventive Maintenance 4 3

Cleaning the Plotter
To maintain the plotter in good operating condition, keep it free of dust accumulation, ink, and other contamination. Cleaning intervals are determined by the plotter environment and by the types of plotter supplies used. WARNING Disconnect the plotter from the power source prior to performing any cleaning. DO NOT allow liquid to run on to electrical components or circuits, or through openings in the enclosure, as this can create a shock hazard leading to death or injury.

General Cleaning
Proper general cleaning should include the following: 1 Blow away dust accumulation with compressed air if available. 2 Clean the outer surface of the plotter with a damp sponge or cloth. Use a mild soap and water solution if necessary. Do not use abrasive cleaners. 3 Wipe the plotter dry with a soft lint free cloth.

Cleaning the Drive Roller
Due to the ink's reflectance, ink spilled on the roller can disrupt the plotter's edge sensing function. To remove any ink from the roller, perform the following procedure: 1 Connect the plotter to the ac power source. 2 Switch the plotter ON, and wait for it to finish initialization. 3 Open the top cover. 4 Keep the cover switch pressed while pressing Form Feed repeatedly until the stained area of the drive roller is positioned at the top where it can be cleaned. 5 Turn the plotter OFF, and disconnect it from the ac power source. 6 Apply IPA (alcohol) to a soft, lint free rag. 7 Use the rag to clean the roller surface. 8 Allow the drive roller to dry. 9 If other areas of the roller have been stained by ink, repeat the above steps. 10 Reconnect the plotter to the ac source, turn the plotter on, and load paper to test that no ink reflections disrupt operation of media loading.

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Preventive Maintenance

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