Table of Contents
Advertisement
HEIDENHAIN
DR. JOHANNES
HEIDENHAIN
GmbH
D-8225 Traunreut
.Tel.(O8669)31-0
SERVICE
MANUAL TNC 151/155
Page
14.1
Kundendienst
Section
2.2.3
Visual
Display
Unit
BE 411 in conjunction
with
TNC 155
The Display
Units
BE 411 is
supplied
by 11 Vds from
the
units
own integrated
power
supply.
A defect
in
this
power
supply
may cause
an apparent
CRT display
fault.
If
the
fault
is
not
due to the
detective
power
supply,
it
is
likely
to be due to the
CLP-Graphics
Board,
which
contains
the
control
circuitry
for
the
Display
Unit.
This
can be
verified
by exchanging
the
board
for
one which
is known
to
function
correctly.
If
the
fault
still
persists
then
must
be due either
to bad
connections
within
the
TNC (eg on the
Connector
Board),
or
to
faults
on both
the
VDU and the
CLP-Graphics
Board.
See the
diagram
opposite
for
a logical
procedure
for
locating
the
fault
in the
system.
Testing
of the
VDU BE 111/211
and associated
circuitry
Hide quick links:
Advertisement
Table of Contents
