TroubleshootingModel 2500 186
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7.3 Power Supply
This section gives an overview of possible issues which may be encountered with the instrument
power supply while operating the Model 2500 Dissolution System. To ensure consistent
performance, follow the recommended possible solutions given for a specific problem.
Check the instrument for any shortages starting from the power
switch, loose wiring, DC power supply and visually inspect
circuit boards to ensure that there are no apparent burnt marks.
Check overloaded panel circuit breaker.
M a in circuit b rea ker
keep s t r ipping
Ground Fault
Interrupter (GFI)
Check the instrument for any shortages starting from the power
switch, loose wiring, DC power supply and visually inspect
circuit boards to ensure that there are no apparent burnt marks.
Check overloaded GFI.
Pow er sw it ch keeps
trippin g
Circuit Breaker
Power Switch
Check the instrument for any shortages starting from the power
switch, loose wiring, DC power supply and visually inspect
circuit boards to ensure that there are no apparent burnt marks.
Underrated power switch if it was changed.
N o +2 4 volt DC
volt a g e supp ly
N o +1 2 volt DC
volt a g e supp ly
Check that the AC input lines are receiving AC power and are
secured correctly on the power supply AC terminals.
Check the output of the power supply. It should read +24 volts
DC. Make sure that wires on the DC terminals are secured
correctly.
Check bridge board for +12 DC volt on main board test point TP3
(2400-5175).
Faulty power supply. Replace the power supply.
N o +5 volt DC
volt a g e supp ly
N o +3 .3 vo lt D C
volt a g e supp ly
Check that the DC input lines coming from the power supply are
secured correctly.
Check the respective voltages using the various test points on the
bridge board (2400-5175).
Faulty bridge board. Replace bridge board (2400-5175).
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