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Warranty and Service:
Factory assembled units are warranted against defects in parts or
workmanship for one year from purchase. Kits are warranted against defects in parts only for one
year from purchase. This warranty applies to the original purchaser only; it is not transferable. Units
returned for warranty service must be accompanied by a copy of the receipt showing the
purchaser's name and the date of purchase. All returns must be shipped to us pre-paid; we will not
accept units with postage due. A return form is provided on our web site for your convenience.
If you need to return your Z11 to us for service, package it carefully, keeping in mind that we will re-
use your packaging to return the unit to you. A self-addressed return shipping label, while not
required, will help insure speedy and accurate delivery of your repaired unit. Include a full
description of the problem, along with your name, address and a phone number or e-mail where we
can reach you with any questions. Repair turnaround can vary from 2 to 6 weeks, depending on the
particular problem.
We will be glad to service your Z11 after the warranty period. We will notify you of repair charges by
phone or e-mail, and bill you after repairs are completed.
Firmware upgrades: From time to time we will release upgraded firmware for the Z11, refining
operation and adding features. Your Z11 is not field programmable; you will have to remove the
present chip and replace it with the upgrade chip. To remove the chip (68HC11, U1(location D7 on
parts placement grid)) you will need an appropriate tool. A PLCC extraction tool is ideal, but if you
don't have one you can fashion a substitute from an ordinary paperclip. Straighten the paper clip,
then bend it into a "U" shape. Use pliers to bend the last 1/8" of each end toward the center (see
illustration).
The extraction tool fits into opposite corners of the 68HC11socket; the bent ends will lift the chip
from beneath. Touch a ground point to avoid static discharge damage, and remove the case top.
Insert the tool and pull gently and evenly on both sides to extract the chip. Press the upgrade chip
into the socket, observing the small diagonal corner key. Replace the case top; your upgraded Z11
is ready for service.
You will return the old processor chip to LDG; the upgrade is sold by exchange only. The
processors are recycled and reprogrammed to minimize future upgrade costs. Upgrades will cost
$10-20 with chip exchange, and will be announced on our web site when available.
Feedback: If you have an idea to improve our software or hardware, please send us a description.
If we incorporate your idea in the Z11, we'll send you a free upgrade as a "thank you".
We encourage everyone who uses the Z11 to contact us (card, letter or e-mail preferred) telling us
how well it works for you. We are also always looking for photographs of the Z11 in use; we
frequently
place
such
pictures
in
the
LDG
Newsletter
and
on
our
Web
site
(www.ldgelectronics.com).
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