Ash Prisma HD User manual

User Manual

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Table of Contents
Package Contents............................................................... 2
Installation........................................................................... 3
Controls............................................................................... 5
Power .............................................................................. 5
Mode................................................................................ 5
Magnification ................................................................... 6
Overview.......................................................................... 6
Focus............................................................................... 6
Brightness........................................................................ 7
Freeze ............................................................................. 7
Using the Prisma HD........................................................... 7
Reading with the Prisma HD............................................ 7
Writing with the Prisma HD.............................................. 9
Focus lock ....................................................................... 9
Lighting on/off.................................................................. 9
Sound on/off.................................................................. 10
Factory defaults............................................................. 10
Troubleshooting ................................................................ 10
Changing TV Standard.................................................. 10
Taking Care of your Prisma HD ........................................ 10
Specifications.................................................................... 12
Declaration Of Conformity................................................. 12
Warranty............................................................................ 13
Package Contents
Your Prisma HD package contains:
Prisma HD camera and table
Power supply
HDMI output cable
Reading mat and operation manual
Allen key for adjusting the hinge tension
Please retain the packaging in case there is a need to return
the unit for service or repair.

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Installation
Plug the power supply into a mains socket. Plug the power
lead from the power supply into the Prisma HD, at the rear
near the base (see diagram).
Plug the HDMI cable into the Prisma HD and the other end
into your television.

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Power on the Prisma HD by pressing
the power button on the right of the
control panel.
You should have an image on the
TV. If not, use your TV’s remote
control or control panel to switch to
the appropriate HDMI input used for the Prisma HD
25cm - 30cm
Raise the camera so that it is roughly 25 to 30 cms above
the table. If it is too far or too close to the text the camera
will not be able to focus correctly.

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The light can be rotated as shown. It should be adjusted so
that it shines on an area centred about the camera’s image.
Controls
Power
Zoom
Down
Zoom
Up
Overview
Mode
Power
Push the button to turn the power on. A blue image will
appear on your TV and, after a few seconds, the picture
from the camera will appear on the TV. Pushing the Power
button again will power-off the Prisma HD.
Mode
Repeated pressing of the Mode button will cycle through the
eight available viewing modes:
Photo mode –full colour for general viewing.
Positive mode –high contrast black on white.

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Negative mode –white letters on a black background.
Semi-colours –five high contrast false colour modes.
If the mode button is pressed while in any reading mode the
unit will change to photo mode. If the mode button is
pressed again within 3 seconds the next mode will be
displayed. However if the button is pressed after 3 seconds
the unit will return back to the original reading mode. This
feature allows a quick view in photo mode. The 3 second
timeout is indicated by a click sound.
Magnification
Press the Zoom-Up button to enlarge the image and Zoom-
Down to reduce the image size. When reading you should
generally choose the smallest size that you can read
comfortably. Note that holding the Zoom-Up button for a
further two seconds at maximum optical zoom will allow the
unit to continue zooming digitally. Digital zoom is indicated
by an “xD” symbol in the top left corner of the screen.
Overview
Overview allows you to easily locate a point of interest on
the page you are viewing. Press and release the Overview
button to make the camera zoom out fully and revert to full-
colour mode. A dot is displayed in the centre of the screen
as an aid to location. Place the point of interest under the
dot and press any key to restore the magnification to the
previous level.
Focus
The camera will continuously autofocus to achieve the
sharpest image. However, please be aware that there is a
limited range over which the camera can focus. Raising the
camera too high (greater than 30cms from the base of the
camera to the page) or placing the camera too low (less
than 25cms from the page) will mean the camera cannot

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focus at high magnification correctly. If the image does not
appear to be in focus, try raising or lowering the camera to
correct it.
Brightness
The image brightness can be adjusted to suit your
preference. Press and hold the Mode button for three
seconds until the unit beeps. Use the Zoom Up and Zoom
Down buttons to adjust the image as desired. Press Mode
again to save the setting. The setting you choose will be
saved and used subsequently for that mode of operation.
Freeze
To freeze the image, press and hold the Overview button
until the beep is heard. The Mode button will operate as
normal but pressing any other button will unfreeze the
image.
Using the Prisma HD
Reading with the Prisma HD
Place the Prisma HD on a suitable table near the television
and sit in front of it. Ideally the television should be at eye
level or slightly below, and the Prisma HD reading table
should be level with your elbows when seated. A good
reading position prevents problems with your back, neck
and arms.

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Place the material you wish to read on the reading table,
looking at the TV screen to see where you are. Adjust the
magnification to suit. Ensure the camera head is horizontal
for optimum image quality.
Move the book on the table until you locate the top of the
page and then locate the start of the text. Simply slide the
book side to side and watch the television screen while
reading.
There is a mat provided with your Prisma HD to facilitate
reading heavier materials. Place the mat across the reading
table with the rubber side upwards. Place the book on the
mat and slide the mat from side to side.

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Writing with the Prisma HD
Remove the mat from the table. Place the page under the
camera and locate the area of the page where you wish to
start writing (the overview function is useful for this).
Holding the page firmly, bring your pen, raised well above
the paper, until the nib is visible on the screen at the point
you wish to write. Lower the pen to the paper carefully and
write. You should watch the screen as you write.
Locating the Prisma HD camera in a well-lit area will
enhance the image available from the unit. If possible,
avoid direct overhead lighting as this can cause shadows on
the page, leading to shading differences on the screen.
Focus lock
Press Mode and Overview simultaneously to turn off the
autofocus facility. Repeat to re-enable autofocus.
Lighting on/off
If you wish to turn off the LED lighting then, with the unit
powered off, press Zoom Up and power the unit on. Repeat
to allow the lighting to function again.

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Sound on/off
The sounds can be disabled by pressing Zoom Down while
powering on the unit. Repeat to enable the sounds again.
Factory defaults
Press Mode while powering-on the Prisma HD to restore
factory settings for sound, lighting, brightness settings and
video frame rate.
Troubleshooting
Changing TV Standard
Most HD televisions can display all the many different
standards of HD signals, however some cannot. If your
television does not display the image from the Prisma HD
you should try the following: power-off the Prisma, press
and hold the Overview button and power on the unit. This
will change the unit from 50 Hz mode to 60 Hz and vice
versa. You will hear a sequence of three beeps confirming
the frequency change.
Taking Care of your Prisma HD
Do not touch the lens. Dirt on the lens will appear as a
blurred or dim image or as fuzzy spots on the screen. If you
believe the lens is dirty, it can be cleaned with a soft, dry
cloth applying minimal pressure. As the lens is polished and
coated, do not use a wet or coarse cloth, avoid detergents
and abrasive substances or solvents to clean it.
WARNING: Never look directly at the LED light source for
any prolonged period of time.