IC DESCRIPTION
IC, CXA1992AR
Pin No.Pin NameI/ODescription
Output terminal for focus error amplifier. Internally connected to window comparator
input for bias condition.1FEOO
2FEIIInput terminal for focus error.
3FDFCTICapacitor connection terminal for time constant used when there is defect.
This pin is connected to GND via capacitor when high frequency gain of the focus
4FGDI
servo is attenuated.
This is a pin where the time constant is externally connected to raise the low frequency5FLBI
gain of the focus servo.
6FE_OOFocus drive output.
7FEMIFocus amplifier inverted input pin.
This is a pin where the time constant is externally connected to generate the focus8SRCHI
search waveform.
This is a pin where the selection time constant is externally connected to set the9TGUI
tracking servo the high frequency gain.
This is a pin where the selection time constant is externally connected to set the
tracking high frequency gain.10TG2I
11FSETIPin for setting peak of the phase compensator of the focus tracking.
12TA_MITracking amplifier inverted input pin.
13TA_OOTracking drive output.
14SL_PISled amplifier non-inverted input pin.
15SL_MISled amplifier inverted input pin.
16SL_OOSled drive output.
The current which determines height of the focus search, track jump and sled kick is17ISETI
input with external resistance connected.
18VccIPower supply.
19LOCKIOL� setting starts sled disorder-prevention circuit. (Not pull-up resistance)
20CLKIClock input for serial data transfer from CPU. (No pull-up resistance)
21XLTILatch input from CPU. (No pull-up resistance)
22DATAISerial data input from CPU. (No pull-up resistance)
23XRSTIReset system at OL� setting. (No pull-up resistance)
24C_OUTOSignal output for track number counting.
FZC, DFCT1, TZC, BALH, TGH, FOH, or ATSC is output depending on the
command from CPU.25SENS1O
26SENS2ODFCT2, MIRR, BALL, TGL or FOL is output depending on the command from CPU.
27FOKOOutput terminal for focus OK comparator.
28CC2IInput pin where the DEFECT bottom hold output is capacitance coupled.
DEFECT bottom-hold output terminal. Internally connected to interruption comparator29CC1O
input.
30CBIConnection terminal for DEFECT bottom-hold capacitor.
Connection terminal for MIRR hold-capacitor.31CPI
Anti-reverse input terminal for MIRR comparator.
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ACEC
