6-8. IC PIN FUNCTIONSPin No.Pin NameI/OFunction
Y IC101 FOCUS/TRACKING/SLED SERVO RF AMP (CXA1992AR)RF summing amplifier inverted input
34RF MIThe RF amplifier gain is determined by the resistance connected between this pin and
Pin No.Pin NameI/OFunction
Focus error amplifier outputRFO pin
1FEOOConnected internally to the window comparator input for bias adjustment35RFTCIExternal time constant setting pin during RF level control
2FEIIFocus error input36LDOAPC amplifier output
37PDIAPC amplifier input
3FDFCTICapacitor connection pin for defect time constant
4FGDIGround this pin through a capacitor for cutting the f-frequency gocus serain vo high38PD1IRF I-V amplifier inverted input
39PD2IConnect these pins to the photo diode A+C and B+D pins
5FLBIExternal time constant setting pin for boosting the f-frequencyocus servo low
6FE OOFocus drive outputIBias adjustment of focus error amplifier
40FE BIASLeave this pin open for automatic adjustment
7FE MIFocus amplifier inverted input
8SRCHIExternal time constant setting pin for generating focus search waveform41FIF I-V and E I-V amplifier inverted input
IConnect these pins to photo diodes F and E
9TGUIExternal time constant setting pin for switching tr-frequency gacking highain42E
10TG2IExternal time constant setting pin for switching tr-frequency gacking highain43EI�I-V amplifier E gain adjustment
(When not using automatic balance adjustment)
11FSETIPeak frequency setting pin for focus and tracking phase compensation amplifier
12TA MITracking amplifier inverted input44VEE�Negative power supply
Tracking error amplifier output
13TA OOTracking drive output45TEOO
14SL PISled amplifier non-inverted inputE-F signal is output
Comparator input for balance adjustment
15SL MISled amplifier inverted input46LPFII
16SL OOSled drive output(Input from TEO through LPF)
Connect an external capacitance to set the current which determines the F47ocus searTEIch,ITracking error input
17ISETITrack jump, and Sled kick heights48ATSCIWindow comparator input for ATSC detection
Trackig z-ecross comparroator input
18VCCIPositive power supply49TZCI
19LOCKIThe sled overrun prevention circuit operates when this pin is Lo-up resistance)w (No pull50TDFCTICapacitor connection pin for defect time constant
20CLKISerial data transfer clock input from CPU (No pull-up resistance)51VCO(VCC + VEE)/2 direct voltage output
21XLTILach input from CPU (No pull-up resistance)52FZCIFocus ze-cross comparroator input
22DATAISerial data input from CPU (No pull-up resistance)
23XRSTIReset input; resets at Lo-up rw (No pullesistance)Y Abbreviation
APC : Auto Power Control
24C.OUTOTrack number count signal output
Outputs FZC, DFCT1, TZC, BALH, TGH, FOH, ATSC, and others according to the com-
25SENS1O
mand from CPU
Outputs DFCT2, MIRR, BALL, TGL, FOL,and others according to the command from
26SENS2O
CPU
27FOKOFocus OK comparator output
28CC2IInput for the defect bottom hold output with capacitance coupled
Defect bottom hold output
29CC1O
Connected internally to the interruption comparator input
30CBIConnection pin for defect bottom hold capacitor
Connection pin for MIRR hold capacitor
31CPI
MIRR comparator non-inverted input
32RF IIInput for the RF summing amplifier output with capacitance coupled
33RF OORF summing amplifier output
Eye-pattern check point
Y Abbreviation
FZC : Focus zero-crossATSC : Anti Shock
DFCT : DefectMIRR : Mirror
TZC : Tracking zero-crossBALL : E-F Balance (Low)
BALH: E-F Balance (High)TGL : Tracking Gain (Low)
TGH : Tracking Gain (High)FOL : Focus Bias (Low)
FOH : Focus Bias (High)
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