Alarms; Fire Check; Rom Or Ram Error; Spacing Error - Fujitsu DL7600 Maintenance Manual

5.3.7 Alarms

5.3.7.1 Fire Check

A fire check alarm occurs if:
Abnormal current flows because of damage to the space, line feed, or tractor motor, or a motor driver.
The space motor has been excited for a long time.
Current flows to the head drive transistor for a period longer than specified.

5.3.7.2 ROM or RAM Error

A ROM or RAM error occurs if an error is detected during the following checks when power is turned on.
① ROM check
Check data is set for each ROM, and an add-up check is performed.
② RAM check
A RAM check is performed while writing 0 and 1 to every RAM address and reading them.
EEPROM (nonvolatile memory) check
Check data is set for each EEPROM, and an add-up check is performed.

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

5
An Overload alarm occurs if:
When the power-supply voltage +40V doesn't return though it is a division by voltage descent print.
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