Canon BW Voice Guidance Board-A1, Service Manual

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Chapter 1
1-1
1.1 New Function
1.1.1 Overview
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Background of Product Development
The audio guide on the control panel has been designed to assist people with no sight or limited sight in keeping with
the provisions of the Disabilities Act.
Care has also been taken so that people in general may take advantage of the function for extra help without feeling
anything out of the ordinary. In this sense, the function is expected to add to the ease of use of the machine for general
and handicapped users alike.
Flow of Voice Generation
The machine’s digital voice consists of discrete signals generated by controller system files stored on its hard disk.
These signals are sent from the controller board to the audio board by way of a PCI bus in appropriate sequence.
When they reach the audio board, the signals are merged so that each segment has a specific duration. The result is
then subjected to digital-to-analog conversion and sent to the speaker after volume control.
Slide Switch (SW1) on the Voice Guidance Board-A1
The slide switch (SW1) on the Voice Guidance Board-A1 is provided as a means of switching frequencies (33 MHz/
66 MHz) to suit the transfer speed of the PCI bus. It is important for the switch setting to suit the transfer speed so
that the voice will be free of interruption. If you inadvertently moved the slide, be sure to put it back to its correct
position. For the iR6570/5570, the frequency must be set to 33 MHz.
1.1.2 Using the Function
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Preparing the Machine for Audio Guide Mode
For details, see the instructions on installation. The following is an outline of the work.
1. Make sure that the machine is off, and fit the Voice Guidance Board-A1 into the PCI bus.
(Be sure there is at least 512 MB of memory.)
2. Connect the speaker to Line-Out of the Voice Guidance Board-A1, and turn on the machine.
To check to see if the machine has recognized the presence of the Voice Guidance Board-A1,
Sart service mode (by pressing the User Mode key, the 2 and 8 keys at the same time, and then the User Mode key
once again).
Then, make the following selections: COPIER>DISPLAY>ACC-STS
If the notation ‘Voice Board’ is indicated in PCI1 through PCI3, the machine has recognized the presence of the
board.