Star Tech Journal

July 1996
CD
STAR*TECH
... continued from previous page.
three or four pieces. The damage
looks worse than it really is. Of
course if you have a few spare
parts monitors in the shop, it
probably makes more sense just
to replace the board with another
one. It is just a few wires to sol-
der.
Consider that the neck board
simply provides a place for some
transistors around the CRT
socket, its mechanical strength
isn't critical, it doesn't support
much more than itself.
Contrast that to the board on a
Deltronics ticket dispenser. This
little board is simple and easy to
repair, but it also must support
the ticket notch optical sensor
Journal
Monitor
Proble111s?
worry if the connector is going
to be parted and reconnected
from time to time. In these cases
it is sometimes wiser to extend
the connector away from the
board a few inches on wires
which can be anchored to the
frame or chassis. The connectors
are then mated in mid-air thus
eliminating any stress to the
weakened board.
Order This Tech Pub
.JVIONITORS:
SYMPTOMs/SoLUTIONS
Includes all S* TJ monitor
articles from 1990, 1991,
1992, 1993, 1994, 1995
& 1996
REPAIR STRATEGIES
We patch boards broken in two.
Cracks on a board not com-
pletely broken need to be
stopped to prevent their spread.
0
0
0
0
0
0
0
Sometimes we can bypass the
damage. If the comer snaps off a
board and we find that a few
traces were just following the
"If the problem is a main logic board
snapped in half across the middle, lay
it gently on the boss's desk and go on
to your next project. "
1990
1991
1992
1993
1994
1995
1996
$14.95
$14.95
$14.95
$14.95
$14.95
$14.95
$14.95
Save over 30% order the
□ Entire set for $69. 95
Name:
------------..
I
and keep it in position. Mechani-
cal strength is more important
here, so the kind of damage
would affect your decision to re-
pair or replace.
The worse case is the board bro-
ken where a connector can stress
it. An example would be the sig-
nal input connector near the cor-
ner of the main board of a video
monitor.
Connectors don't stress the board
by themselves, we only need to
edge of the board around the
comer, we would have to repair
the same traces twice as each
crosses either end of the break.
In this case it might make more
sense to jump past the corner
with wires.
When we attempt repair of a bro-
ken board we are doing two jobs:
First we are restoring some mea-
sure of mechanical strength and
structural integrity, second we are
restoring all the broken electri-
... continued on page 10
Company _ _ _ _ _ _ _ __.l
I
I
Address - - - - - - - - - -
•
: City
I
I State/Zip
I
I
I
I
I
I
: Order o Prepaid or o COD :
I
(Please add $3 s/h. Thank you!)
I
ISTAR*TECH Journal I
I Post Office Box 35 I
L~~f!!~.~~:.~!.°-~~J