Printronix L5000 Series Maintenance Manual page 357

d. Turn the power ON in this condition.
e. Measure the voltage, which should be about 0V.
If voltage is normal and the flash power error still occurs, or if voltage is not
normal, replace the MPU board after checking the harness.
7. Check the flash power unit.
a. Connect the jack to CN11 of the flash power unit.
b. Put the positive lead of the digital multimeter on pin 7 of CN10 on the MPU
c. Turn the power ON.
d. Measure the voltage when the alarm display LED is not illuminated. Voltage
If voltage is not normal, replace the flash power unit.
Troubleshooting
board, and the negative lead on the SG.
should be about 0V.
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