T Scale M503 - Trouble Shooting

M503 Series chair Scales Service Manual (3.09)
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10.5.3 PCB Input Voltage
Check the PCB input power connecter voltage
• Voltage must be minimum 9VDC in to the pin AD+
10.5.4 Check Battery Voltage and Charging Voltage
1. Check the Battery Voltage,
• Voltage must be minimum 6VDC. If below the 6VDC connect the adaptor
for charging
• The battery voltage below the 5.5VDC, replace the battery and install new
6V/3.4Ah battery.
2. Check the Battery Charging Voltage;
• Remove the battery connection terminals (Red and Black) from the battery.
• Connect the power and turn on the scale
• Voltage into the terminal minimum 6.5VDC
10.6 Trouble Shooting
Problems
Possible cause
Common Solutions
Display is blank.
No self test
Mains power is turned
off. Power supply faulty
or not plugged. Internal
battery is not charged.
On/Off switch problem
Check power is getting inside the
scale and on/off switch is working.
Verify the voltages, which is on the
power labels.
Blank display
after self test
Pan not installed.
Unstable weight, load
cell damaged
Check the pans are installed
correctly. Try to turning on again.
OL or ------- Maximum capacity
exceeded. Load cell or
mechanics damaged.
Power supply faulty
Check the platform is installed
correctly. Try to turn on the scale
again. Do the calibration again
------- or NULL
displayed
Weight is on the
platform is below
permissible limit. Pan
not installed correctly.
Power supply faulty.
Load cell or
mechanism faulty
Check the platform is installed
correctly. Try to turn on the scale
again.
Do the calibration again