Nova-Tech PGW Series User Manual

Page 38

Page 38 of 44

Electronic Problems:

These are the rarest of the problems affecting balances. If an electronic
problem is suspected make sure the mechanical problems that can cause
similar symptoms have been eliminated before attempting electronic repairs.
With the exception of cables most electronic repairs are solved by board
replacement.

The table that follows is a guide of common problems and their solutions.
Note that many problems may have multiple solutions and there may be
problems found that are not listed in the table. For Service Information,
contact Adam Equipment or your supplier.

BALANCE DOES NOT FUNCTION

Problems Possible

causes

Suggestions

The balance is dead
when power is applied

Power supply failure

Check adapter is working

Check adapter is correct for the balance

Normal adapter is 15VDC, 800mA.

*Power supply circuit board failure

*Short circuit on any circuit board

The display does not
turn on but the
calibration motor
moves when power is
applied

Power is getting to
balance, display is not
working

*Display cables may be faulty

*Display module failure

The display stays on
the initial test screen
when power is applied.
Calibration weight
motor is on.

Unstable balance

Balance not working
correct

Power supply

*Check if balance is stable by using
service menu and view A/D values

Put draught shield over pan

Check power supplies

BALANCE WORKS BUT IS NOT STABLE

Balance is unstable by
a few divisions

Noise or vibration
from environment

Friction in mechanics

Check the balance is positioned
correctly to avoid vibration, wind or air
movement, it is on a solid table, It is not
near sources of heat or cool air,

Check balance with weights if problem
occurs when sample is used. Static
electricity on the samples can cause
drifting and instability.

Check the area around the weighing
pan for hair, dust, obstructions under
the pan,

*A complete inspection of the