DR. JOHANNES HEIDENHAIN
D-8225 Traunreut
T&ion (086691 31-O. Telex 56831
SERVICE MANUAL TNC 150
PacJe 31
Kundendienst
Se&ion 2.2.7
Description of the Test Program TNC 150
The Test Program TNC 150 is an extension of the BURN-IN Test
Program, and provides the following additional functions:
1. Individual Test Run
K=Y tii!!
This allows any of the tests contained within the BURN-IN
Test Program to be run repetitively. The following dia-
logue will appear on the VDU:
"INDIVIDUAL TEST RUN"
ERROR INTERRUPT: KN El
NO ERROR INTERRUPT: KEY 1
0
This means that if the
0
key is pressed prior to selecting
0
a test, that test will run repetitively until an error
occurs.
upon detecting an error, the test will stop and an
error indicatio '11 be given.
If instead, the
r!
1 key is pressed, the occurrence of an
error with cause e test to stop. There will be no error
indication. This mode permits cyclic measurements.
Furthermore, in the "ERROR INTERRUPT" mode, the faulty
address on the Main Processor Board or the Memory Board
can be written to with either AAAA (1010 1010 etc) or
555.5
(0101 0101 etc).
The following dialogue will be displayed:
ERROR AT ADDRESS: XXXX
WRITE TO FAULTY
rr
SS
WITH AAAA:
KEY 0
WITH 5555: KEY
Cl
El
If key
0
is pressed, the dialogue response will be:
WRITE READ
AAAA xxxx
If key 1 is pressed, the dialogue response will be:
0
WRITE READ
5555 xxxx
A repetitive test can be aborted using the _~~
:l!B
key. The test
will then be run once again in sequence, as per the BURN-
IN Tests.
2.
VDU Test
El
K=Y
This key permits the entire character set to be displayed,
character by character, over the whole of the screen.
This can be started and stopped using the +/ key.
Ll
4. Offset Adjustment of the DAC and Analogue Outputs
,.
K=Y I3
Adjust for positive and negative polarity symmetry between
16mV and 18mV. the polarity can be reversed with the +/ key.
cl
5..~@oard Exchange
As
an aid in board replacement
, each crrcm msssaga ~&% acccm-
par&d with a reference
to the likely defective board.
Where a fault symptom cannot be Klatsd to just one board,
more extensive dialogue is displayed.
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