Lightmed LightLink-CXL, Service Manual

Page: 38 / 99

LightLink-CXL – Service Manual Rev. No. : 01 Page 37 of 98
This is PCB is the main PCB or the only PCB is the laser system and it is located in the
center of the laser head. It is where the all the electronics and laser are generated
and controlled. It is controlled and interfaced with two modules, UVLEDs laser
module, laser aperture motor, backlight LED, buzzer, interlock, and LCD RS232
transceiver (refer to below diagram)
The input voltage applies to the CPU then it converts to +12, +5, and -12VDc.
The laser voltage is gradually increased to 24 VDC and maintains it if the laser system
is activated it. When the laser is ‘ON’, the voltage must greater than 20 VDC then
the condition ‘ON’ criteria is met.
Once the voltage drops till below 16 VDC then the laser is in ‘OFF’ condition. This is
triggering system is accomplished by Schmitt trigger concept.
The CPU then will translate if the voltage is at +5VDC for ‘ON or 20VDC’ state and 0
VDC for ‘OFF or <=16VDC’ state and it can measure across the TP17 (POR signal).
If the laser is unable to function properly or has no output, then confirm if there is 24
VDC across the ZD1 or CN1 connector or TP11 and TP17 for the digital output signal of
5VDC.
MCU msp430f169 support white LED light for the
external camera video capture, two aiming module,
UVLED laser system, Aperture motion control,
buzzer, interlock signal, RS232 communication port,
etc
DC to DC power supply on board had +12V +5V -
12V…etc
RS232 transceiver
Aiming Laser
Module
Aiming Laser
Module
Laser Aperture Spot
rate motion
controller
AC to DC power
24V Interlock
interface
UVLED Laser
Module (including
photo sensor
feedback)
Buzzer
White LED
light module