Ic Description - Aiwa XR-MD811 Service Manual

IC DESCRIPTION

IC, CXA1992AR
Pin No. Pin Name
1 FEO
2 FEI
3 FDFCT
4 FGD
5 FLB
6 FE O
7 FE M
8 SRCH
9 TGU
10 TG2
11 FSET
12 TA M
13 TA O
14 SL P
15 SL M
16 SL O
17 ISET
18 VCC
19 LOCK
20 CLK
21 XLT
22 DATA
23 XRST
24 C.OUT
25 SENS1
26 SENS2
27 FOK
28 CC2
29 CC1
30 CB
31 CP
I/O
Output terminal for focus error amplifier. Internally connected to window comparator
O
input for bias condition.
I Input terminal for focus error.
I Capacitor 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
I
servo is attenuated.
This is a pin where the time constant is externally connected to raise the low frequency
I
gain of the focus servo.
O Focus drive output.
I Focus amplifier inverted input pin.
This is a pin where the time constant is externally connected to generate the focus
I
search waveform.
This is a pin where the selection time constant is externally connected to set the
I
tracking servo the high frequency gain.
This is a pin where the selection time constant is externally connected to set the
I
tracking high frequency gain.
I Pin for setting peak of the phase compensator of the focus tracking.
I Tracking amplifier inverted input pin.
O Tracking drive output.
I Sled amplifier non-inverted input pin.
I Sled amplifier inverted input pin.
O Sled drive output.
The current which determines height of the focus search, track jump and sled kick is
I
input with external resistance connected.
I Power supply.
I "L" setting starts sled disorder-prevention circuit.
I Clock input for serial data transfer from CPU.
I Latch input from CPU.
I Serial data input from CPU.
I Reset system at "L" setting.
O Signal output for track number counting.
FZC, DFCT1, TZC, BALH, TGH, FOH, or ATSC is output depending on the
O
command from CPU.
O DFCT2, MIRR, BALL, TGL or FOL is output depending on the command from CPU.
O Output terminal for focus OK comparator.
I Input pin where the DEFECT bottom hold output is capacitance coupled.
DEFECT bottom-hold output terminal. Internally connected to interruption comparator
O
input.
I Connection terminal for DEFECT bottom-hold capacitor.
Connection terminal for MIRR hold-capacitor.
I
Anti-reverse input terminal for MIRR comparator.
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Description