Kundendienst
SERVICE MANUAL TNC 151/155
PZiTe 18
Section 2.2.6
2.2.6 Burn-In Test
In some case.?., inspite of there being definite fault condi-
tions on the control, error messages may not be displayed on
the VDU. However, the Control's electronics can be tested
with the help of the Burn-In test program.
This test program is a means of dynamically testing the
Control's hardware and can be used not only for duration
testing but also for fault diagnosis.
The test program is stored on a digital cassette and can be
loaded into the Control via magnetic tape units ME 101 B/
102
B or MB 101 C/102 C (Program versions 212 902 05/
212 902 09). The test program cannot be loaded into the
Control if the flashing error message: "TNC ELECTRONICS
DEFECTIVE ." is present on the VDU. In this case, the
faulty board must be determined by exchanging each board
in turn until the fault is eliminated. However, before
exchanging any board,
it is advisable to check the output
voltage from the Power Supply Unit (see section 2.2.4).
TO run the Burn-In test program it is necessary to have a
set of Burn-In Test Adapters.
Figs. 2 to 4.1 show pictorial and schematic representations
of each individual adapter.
Depending on the type of Control, (TNC with either a standard
SE interface or with an external PLC I/O Board) the appro-
priate adapters must be connected as shown in fig. 1.
It is important to have the correct test program for the
type of Control and for the Control's current NC Software
issue. The test programs are listed on page
20.
The type Of
Control can be determined from the identification number of
the unit; the issue of the NC Software can be determined form
the NC Software issue number. Both these numbers are found on
the type-plate on the rear of the Control.
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