Schiller AT-102, Service Handbook

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3.2
AT-102 Service Handbook
Introduction
The AT-102 is designed to be simple to use and simple to service: the service philosophy of
the AT-102 is module and board replacement (no details are given in this book for board
repair). The purpose of this chapter is to provide fault-finding procedures that will quickly
and efficiently identify a fault to a specific module. Fault-finding procedures are designed so
that test equipment is kept to a minimum.
The AT-102 contains the following modules:
MK 18-1 Main Board including main and LCD power supplies
LCD screen assembly
Alphanumerical keyboard (integral part of the top assembly)
Printer assembly
Paper tray motor
An initial fault-finding table is provided detailing general fault indications. Use the
procedures on the following pages to indicate a faulty area or module. In most cases the
fault finding tables should indicate the most likely faulty area. When more than one module
is stated, the first module given is the one most likely to contain the fault. Other modules
given should be checked in the order given. When a module has been replaced specific test
parameters and setting-up of the module may be applicable. The removal and replacement
instructions for all replaceable modules, along with any setup or check procedures
required, are given in Chapters 4 and 5.
If the initial fault-finding table does not indicate the area where the fault exists, re-check all
the settings and parameters that have been entered. If these are correct, check the
software.
General Check Procedures
The procedure detailed here is a general confidence check of the unit after an internal
module or board has been replaced. It is not a full functional test (which can only be carried
out with dedicated equipment in the factory) but is intended to provide a general confidence
check in all the major AT-102 functional areas. The instructions given here are guides to the
basic functions. If more operating information is required (general settings, comprehensive
menu guides etc.) please refer to Chapter 1 in this publication or the AT-102 user guide.