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3. Mode
35950
35950
Self-diagnostic
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! MANUAL
Synchronization
frequency
Shows the synchronization frequency of 20 seconds after the polygon mirror is turned on.
If the value of the Synchronization frequency is out the following range because the synchronous sensor
could not detect laser lights R, G or B, the value of the frequency is judged to be abnormal.
• QSS-37 series/LP7500/LP7600/LP7700/LP7900: 2043±7
• QSS-35 PLUS series/LP7100/LP7200/LP7000: 1380±7
NOTE
• If ☞No. 06076-00002 Polygon Mirror control error. occurs, that means the light intensity value is
decreased.
• If B and R lasers have any problem, Synchronous Detection Setting Value (R), Synchronous
Detection Setting Value (B), Light Source Status (R) and Light Source Status (B) also turn No Good.
Polygon mirror (Locked) Confirms if the polygon mirror LOCK signal is detected within 20 seconds after the polygon mirror is turned
on.
When the rotation of the polygon mirror is stabilized but the signal transmitted from the polygon mirror driver
PCB (LOCK signal) does not reach the laser control PCB, No Good is shown at Polygon mirror (Locked).
NOTE
• If ☞No. 06076-00001 Polygon Mirror control error. occurs, rotation of the polygon mirror is unstable
or is stopped.
• If rotation of the polygon mirror is stopped, NG is shown also for the followings: Synchronous
Detection Setting Value (R), Synchronous Detection Setting Value (G), Synchronous Detection
Setting Value (B), Light Source Status (R) and Light Source Status (B).
• OK: polygon mirror rotation is stable.
• No Good: polygon mirror rotation is unstable.
Explanation
Number of synchronous
detection supervisory
Configure how many times synchronous detection observation is performed for each of R, G and B.
• Input range: 1000 to 60000 (initial value: 1000)
• Time required: 60 seconds to 60 minutes
IMPORTANT
• Inputting larger value increases the number of synchronous detection. Therefore, the
observation time becomes longer.
For example, for cases with low occurrence frequency, change the value if you want to observe
for longer time.
When the symptom is occurring currently, 1000 times is sufficient for observation.
Synchronous detection
power
The laser power (light intensity) at synchronous detection can be arbitrarily specified for each of R, G and B.
• Input range: from 100 to 1 (initial value: 100)
• Start diagnosing with 100.
• If no abnormal condition is detected with the laser power of 100, gradually reduce the R, G and B values
to detect abnormal condition.
IMPORTANT
• With the usual synchronous detection such as that when printing, the detection is performed
with the power of 100%. Decreasing this value reduces the light intensity, and no laser light is
output with the lowest value, 1%.
Thus, the point at which the synchronous detection cannot be performed (asynchronous point)
must exist somewhere in the range from 100 to 1%. Asynchronous point tends to become larger
with less light intensity and smaller with more light intensity.
For example, asynchronous point is at 100% for system with little laser light output and with high
occurrence frequency of No. 6073: Synchronous Sensor error., 70% for system with lower
laser light and with low occurrence frequency of No. 6073: Synchronous Sensor error., 20%
for system with correct laser light intensity.
Number of failed
synchronous detection
Shows the number of failed synchronous detection for each R, G and B.
The number of failed synchronous detection will be updated when completing the synchronous detection.
Explanation
Distributed by: minilablaser.com
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