PART II
12
3 Service
3.1 Printer selftest
To do a performance test of the DC power supply, a selftest programme in the printer
can be used.
Connect a DC power source of 10.5V to 32V to the DC input connector.
SwitchontheON-OFFswitchandsimultaneouslypressdownthe“linefeed”button.
After a few seconds (at low input voltage) the printer starts the selftest a printing routine,
which means that the power supply is OK.
Switch off the printer.
3.2 Module check of the DC power supply
Connect a dummy load of 33Ω/30W to 30V output.
Connect a dummy load of 33Ω/5W to 10V output.
Connect a DC power source of 10.5V to the DC input connector.
Switch on the power supply module. The module has to start up within 4 seconds.
Connect a voltmeter to the 30V output and read 28 ±2V.
Connect a voltmeter to the 10V output and read 9V ±1V.
Connect a DC power source of 32V to the DC input connector.
Switch on the power supply module. The module has to start up within 1 second.
Connect a voltmeter to the 30V output and read 33V ±2V.
Connect a voltmeter to the 10V output and read 10V ±1V.
Disconnect the dummy load from the 30V output and read the voltage to 39V ±2V.
3.3 Check after repair
If any repair has occurred to the power supply module, then perform chapter 3.2
MODULE CHECK OF THE DC POWER SUPPLY.
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