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HP 750 User Manual

Page 220

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10-22

C4705-90000

Product History and Service Notes

Air Flow from the Fan can Cause Spray and Misdirection

Date:

1 February 1996

Service Note:

C3196AĆ05

C3198AĆ03

Supersedes:

None

Products:

HP DesignJet 750C (C3196A)

HP DesignJet 750CM (C3198A)

Serial Numbers:

C3196A ESA0000000/ESA4508541

C3198A ESA0000000/ESA4508541

To be performed by: HPĆQualified Personnel
Parts Required:

Part Number

Description

Qty

C3195Ć40066

Fan Deflector

1

Situation

Air flow from the fan can cause spray and misdirection, generating a vertical band in certain

prints on glossy media.
The band is on the left side and has a width of about 10 centimeters or 3.94 inches. It is only

visible in certain area fills and shows up as:

D Hue change.
D Increase of the coalescence problem.
D Increasing the horizontal banding.

The problem affects only EĆsize plotters.

Solution

A new part has been designed to be installed in the YĆyoke. The YĆyoke is the metallic part

mounted on the chassis between the two slider rods.
This part, called a fan deflector, deflects the air coming from the fan so that it does not affect

the print quality.
The procedure to install the fan deflector is as follows:

1 Open the window.
2 Identify the YĆyoke, on the chassis, between the slider rods and behind the carriage belt.