Power Supply - Fujitsu ULTIMA90 Maintenance Manual

5.3.7.3 Spacing Error
A space alarm occurs if a space error is detected during spacing operation.
A predetermined pulse signal is applied to the space motor but the left-end sensor shows no change. （ The
sensor freezes in detection state or detects nothing.）
Printer column management is abnormal; the left-end sensor is detected at a place other than the left end or vice versa.
5.3.7.4 APTC Gap Alarm
When the optional automatic paper thickness control mechanism is used, a gap alarm occurs if:
Paper is thicker than the specified value.
The APTC motor drive circuit is damaged and the motor does not rotate.
APTC retract operation does not work normally.
Paper thickness cannot be detected.
The mechanism keeps staying at the retract position when paper thickness detection is performed.
5.3.7.5 HCPP Alarm
An HCPP alarm occurs if:
An attempt to change the paper path failed.
The reference position cannot be detected during initial operation (at power-on).
The reference position cannot be detected during initial operation performed for continuous loading.
5.3.7.6 FAN Alarm
A FAN unit error occurs if:
When the FAN breaks down.
5.3.7.7 Jam Alarm
A Jam alarm occurs if:
When load/unload operation, the paper on DV roller doesn't move.
.3.7.8 Overload Alarm
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An Overload alarm occurs if: When the power-supply voltage +40V doesn't return though it is a
division by voltage descent print.
5.3.7.9 Overload Alarm
A Low voltage alarm occurs if:
When the power-supply voltage decreases besides the print.

5.3.8. Power Supply

The power supply circuit consists of the components shown in the block diagram in Figure 5.3.21 AC
input filter
Direct rectifying and smoothing circuit (including surge current preventive circuit)
+5V/+34V switching regulator
This section explains the +5V/+34V switching regulator and surge current preventive circuit according to the
block diagram in Figure 5.3.21.
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