I’m currently trying to reverse engineer the Sony KES-400A OPU. I have a some of the circuitry figured out from sources like Sam W’s LASER FAQ and Edwin Hwu’s publications but I’m currently blocked on the LASER Driver IC. The OPU has all three LASER’s (IR/Red/Violet) in one package driven by a 3 channel driver. The control signals indicate that the Driver is a clocked part, so I’m assuming it uses DAC’s to set the LASER drive currents. The figure below shows the Driver circled in red on the left and a close-up of the FPC on the right.
Does anybody have any information on this Driver IC? A part number would be a great start and a data sheet would be a miracle. Any help would be greatly appreciated.
