SECTION 5
DIAGRAMS
5-1. IC PIN FUNCTION
IC101 FOCUS/TRACKING/SLED SERVO RF AMP (CXA1992AR)
Pin No.Pin nameI/ODescription.
Focus error amplifier output.
1FEOO
Connected internally to the window comparator input for bias adjustment.
2FEIIFocus error input.
3FDFCTICapacitor connection pin for defect time constant.
4FGDIGround this pin through a capacitor for cutting the focus servo high-frequency gain.
5FLBIExternal time constant setting pin for boosting the focus servo low-frequency.
6FE OOFocus drive output.
7FE MIFocus amplifier inverted input.
8SRCHIExternal time constant setting pin for generating focus search waveform.
9TGUIExternal time constant setting pin for switching tracking high-frequency gain.
10TG2IExternal time constant setting pin for switching tracking high-frequency gain.
11FSETIPeak frequency setting pin for focus and tracking phase compensation amplifier.
12TA MITracking amplifier inverted input.
13TA OOTracking drive output.
14SL PISled amplifier non-inverted input.
15SL MISled amplifier inverted input.
16SL OOSled drive output.
Connect an external capacitance to set the current which determines the Focus search,
17ISETITrack jump, and Sled kick heights.
18VCCIPositive power supply.
19LOCKIThe sled overrun prevention circuit operates when this pin is Low (No pull-up resistance).
20CLKISerial data transfer clock input from CPU (No pull-up resistance).
21XLTILach input from CPU (No pull-up resistance).
22DATAISerial data input from CPU (No pull-up resistance).
23XRSTIReset input; resets at Low (No pull-up resistance).
24C.OUTOTrack number count signal output.
Outputs FZC, DFCT1, TZC, BALH, TGH, FOH, ATSC, and others according to the
25SENS1Ocommand from CPU.
Outputs DFCT2, MIRR, BALL, TGL, FOL,and others according to the command from
26SENS2OCPU.
27FOKOFocus OK comparator output.
28CC2IInput for the defect bottom hold output with capacitance coupled.
Defect bottom hold output
29CC1OConnected internally to the interruption comparator input.
30CBIConnection pin for defect bottom hold capacitor.
Connection pin for MIRR hold capacitor
31CPIMIRR comparator non-inverted input.
32RF IIInput for the RF summing amplifier output with capacitance coupled.
RF summing amplifier output
33RF OO
Eye-pattern check point.
RF summing amplifier inverted input.
34RF MIThe RF amplifier gain is determined by the resistance connected between this pin and
RFO pin .
35RFTCIExternal time constant setting pin during RF level control.
36LDOAPC amplifier output.
37PDIAPC amplifier input.
38PD1IRF I-V amplifier inverted input.
39PD2IConnect these pins to the photo diode A+C and B+D pins.
Bias adjustment of focus error amplifier
40FE BIASI
Leave this pin open for automatic adjustment (not used).
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ACEC
