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18.0 Transient Suppressor Replacement
The primary of the mains transformer within the TCS-80X is protected against
high voltage spike interference by two voltage dependent resistors. These
provide a short circuit to voltage peaks in excess of their maximum rating.
Should the TCS-80X be inadvertently connected to 3 phase line/line voltages,
or to 240V when selected to 120V, or any other incorrect voltage, these
suppressors are likely to fail in a protective short circuit mode. This will be
demonstrated by repeated mains fuse failure when powering up the unit.
Even in this case of extreme overvoltage, the TCS-80X are protected against
failure, and the simple removal of these suppressors will allow the unit to be
used again. However, it is important that they are replaced as soon as
possible to ensure continued protection.
Figure 18.1 indicates the location and specification for the suppressors.
Fig 18.1 Suppressor
location
19.0 Extended Memory
The maximum available delay time can be easily extended should this be
required.
Refer to the spare parts information sheet at the back of this manual for details
on part numbers for the relevant parts. You will require 2 off for the TCS-804
and 1 off for the TCS-803.
Please remember that these chips are static sensitive and that they should be
handled with care. If you are not familiar with the correct handling procedures
then we suggest you refer the installation to your local BSS dealer.
REMEMBER TO MOVE THE INTERNAL JUMPER CN10A/B, LOCATED NEAR
THE EPROM.
TCS-803: FIT IC42 ONLY
TCS-804: FIT IC42 and IC43.
Fig 19.1 Extended
Memory Jumper
Setting
Transient Suppressor Replacement
Extended Memory
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