Servicing And Maintenance - KERN ADJ Series Service Manual

15 Servicing and Maintenance

Serial fault
number phenomenon
1 Incomplete
characters
broken code
on LCD display
2 Keyboard
failure ： no
response after
pressing any key
(except the
ON/OFF key),
whether the
sound on key
press is on or not
3.
Cannot power
on, the
balance displays
shutdown
after power
on, no response
after pressing
ON/OFF key
4 No display
after power on
40
Causes
1. The chips on PCB board of
or the display are not completely
welded
2. Data cable （that connects
the
display panel to main PCB
or
LCD board) comes
loose
3. LCD display is defective
or the pins come loose
1. Buttons
failure.
2. Data cable (that connects
the keyboard and the LCD
board of the display) come
loose.
1. A weighing p a n , w h i c h
is light in weight or not
installed, may
icon rather low zero-point count
value.
2. The sensor of the balance is
unstable, and there is
interference between the
sensor and its outer shell.
3. The sensor is
defective.
1. AC/DC Power adaptor is
defective.
2. Faulty power panel.
3. The data cable which
connects
Trouble shooting
1. Check the IC pins
and re-weld, and check again
to avoid insufficient solder or
continuous welding
2. Unplug and replug the
data cable or replace it
3. Unplug and replug LCD
pin or replace it
4. Replace the PCB board
on
1. Replace the keyboard
display
(make sure not to bend the
keyboard and endeavor to
place the new keyboard on
the response positions of the
upper cover while replacing
the keyboard).
2. Unplug and replug the
data cable.
1. Check and m a k e sure
the weighing pan assembly is
result in installed. If you still could
not power on, load a 100g
weight on the weighing pan
and reboot.
2. Check and make sure
there is no interference
between the weighing pan
a s s e m b l y and the outer
shell of the balance.
3. Adjust the count value of
the balance until it falls
within the specification range.
4. Replace the
1. Use a multimeter to check
sensor.
whether or not the power
supply has a stable
output
voltage of
12V.
ADJ-SH-e-1910