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User's Manual

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Viewsonic Tweety RF Remote
Rev 2.9A November 05, 2001
Universal Electronics Inc. Confidential
Page 50 of 63
7.3.4 Life
Key Pad with Polydome
All keys must continue operation within specification, after being subjected to500,000 cycles of
key activation at , 250 grams of force @ 120 cycles per minute under normal operating conditions.
7.3.5 Keypad Pull-out Force
The key top must not be separated from its base after 1kg vertical pull up force is applied.
7.3.6 Key stick and key stuck
All keys should rebound to their original height smoothly and instantaneously. All keys should
not get stuck under the key openings whichever location of the key is pressed.
7.4 PCB Material
Material specification needs to be provided to Engineering and approved by Engineering prior to
usage. Layout shall be based on UEI Specification 0029. If carbon ink is used, UEI Specification
0007 should be followed.
7.5 Battery Compartment
• The battery compartment must be clearly marked for battery size and polarity.
•
The battery compartment must be designed to accommodate all brands per American National
Standard Dry Cell and Battery Specification (ANSI C18.1M-1992).
•
The battery must be retained by coil or leaf springs, tight enough to avoid rocking and loose
enough for easy replacement.
• The battery compartment must be designed to prevent contact in case of reverse polarity
during installation.
• The batteries must remove from the battery compartment when a force of 300 to 500 grams is
exerted outward.
• The battery springs must be properly positioned to make contact with the batteries.
•
The battery springs must remain properly seated when a force of 500 grams is applied.
•
The battery springs must be insulated from each other.
7.6 Printing
A pad printing or silk-screening process shall be used for all legends that print on plastic surface. A
silkscreen printing process shall be used on keypad.
All printing shall be free of visible blurs, alignment, or any distortion defects. Ink thickness shall be
sufficient to cover the underlying material’s color.