Category
Symptoms of major
errors and
Trouble shooting
KD200
Service Manual
page
Page 7/10
（
1
）
When the ON/TARE button is pressed ,the scale does not turn on .
Confirming Item
Confirming content
Repairing method
The battery direction Checking the battery
direction
Insert battries in position paying
Colose attention to
（
+
－）
direction
The battery voltage 4 batteries have a voltage
higher than 4V
If the voltage lower than 4V please
Exchange 4 batteries simultaneously
Wires and battery
Contact plate solder
According to item 1,2,3 on
page 9 and to item 1,2,3,4,5
6,7 on page 10.
Arrange the connection in correct
order
Plastic housing
Checking the switch plastic
is deformed
Exchange the cover assembly If it
is deformed
PCB
Exchange the circuit-board
assembly
No problem
，
Can adjust the
contrast.
(2)
［
0
］
or weight values are unstable
Confirming Item
Confirming content
Repairing method
Temperature range Ensure proper temperature
range
Maintain a constant temperature for
1~ 2 hours before use
Effecting as vibration Checking excessive vibration Stop vibration or move to a place
with little or no vibration
Effecting as wind Checking excessive wind Stop wind or move to a place
with little or no wind
Solder
According to item 4,5 on
page 9 and to item 8,9 on
page 10
Arrange the connection in correct
order
Screw
Checking the conation screw
M4
×
16
Double shear strength must be more
than 0.6N
·
m
Mixing sundries
According to item 28,29 on
page 3
Removing sundries
PCB
Exchange new PCB
Adjust again
(3)
［
0
］
doesn’t exchange after the weight is measured
Confirming Item
Confirming content
Repairing method
Solder
According to item 4,5 on
page 9 and to item 8,9 on
page 10
Arrange the connection in correct
order
PCB
Exchange new PCB
Adjust again
