Cynosure Cynergy, Technical Manual

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24 of 112 850-1265-000, Rev. 4 Cynosure, Inc.
Figure 3B–Main Modules, Rear View
Figure 4 shows the relationships of the main components in the Cynergy laser. The diagram
indicates AC is brought into the laser through the voltage select PCB, and then is directed to the
HVPS directly and to the isolation transformer. At the AC distribution PCB, the AC is separated
into circuits with their own solid-state relays and fusing. The main signals to the control system
are shown including two analog optical signals used for calibration. The HVPS charges a
capacitor bank, whose charge is gated through the flashlamps by IGBTs on the IGBT shelf under
the resonator assemblies. The two-lamp, series drive circuit for the YAG laser is identical to the
drive circuit on the Modular Elite, sharing many of the same parts. The two-lamp, parallel-drive
circuit is more complex for the dye laser; it involves two IGBTs to switch the current through the
individual lamps and another to drive a pulsed simmer. These three IGBTs are driven from the
triple diver PCB. The simmer current is initiated in both heads by striking the trigger
transformers and a separate DC low-current supply provides a soft, blue glow.