32
Chapter 6 Common Fault Treatmentnt
Laser Troubleshooting Table
NO
Fault
phenomenon
Check items
Troubleshooting steps
7
Broken pen
Working
current
confirmation
1. Check whether the power supply is stable and
the current reaches the rated working current.
Signal
interference
2. There is a disconnection during the marking
process, usually due to signal interference. For
this reason, the weak and strong current leads
cannot be bundled or walked on the same side.
The signal line uses a signal line with a shielding
function; Good contact.
Laser
temperature
3. Check whether the laser's temperature is too
high, and the temperature is close to the critical
temperature (the reference temperature is 53
℃
).
Board
4. Check whether the board wiring is correct and
the contact is good.
5. Check whether the 19-pin signal (board
output, control board input, sampling resistance
signal) is normal through an oscilloscope.
8
Light
leakage
Pre-current
confirmation
1. Check whether the light leakage power is
between 15-20mW, and the pre-current needs to
be adjusted if it exceeds.
9
Laser is not
ready
DB25 check
1. Check whether the DB25 cable is in good
contact.
Laser status
confirmation
2. Check whether the laser is working.
10
High
temperature
alarm
Signal
interference
1. Detect whether there is interference in the
surrounding signals.
Laser
temperature
2. If the temperature of the laser case is too high,
the light will be unstable when the temperature
is close to the critical temperature (reference
temperature 53
℃
).
Troubleshoot
PIN16 PIN21
3. PIN16 PIN21 is the alarm output, check
whether the output signal of PIN16 PIN21
is normal (refer to the description of control
interface in the manual).