Ic Pin Functions - Sony HCD-XB8 Service Manual

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6-20. IC PIN FUNCTIONS

• IC101 FOCUS/TRACKING/SLED SERVO RF AMP (CXA1992AR)
Pin Name
Pin No.
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 V
CC
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
32 RF I
33 RF O
• Abbreviation
FZC : Focus zero-cross
DFCT : Defect
TZC : Tracking zero-cross
BALH : E-F Balance (High)
TGH : Tracking Gain (High)
FOH : Focus Bias (High)
ATSC : Auti Shock
MIRR : Mirror
BALL : E-F Balance (Low)
TGL : Tracking Gain (LOW)
FOL : Foucas Bias (LOW)
I/O
Focus error amplifier output
O
Connected internally to the window comparator input for bias adjustment
Focus error input
I
Capacitor connection pin for defect time constant
I
Ground this pin through a capacitor for cutting the focus servo high-frequency gain
I
External time constant setting pin for boosting the focus servo low-frequency
I
Focus drive output
O
Focus amplifier inverted input
I
External time constant setting pin for generating focus search waveform
I
External time constant setting pin for switching tracking high-frequency gain
I
External time constant setting pin for switching tracking high-frequency gain
I
Peak frequency setting pin for focus and tracking phase compensation amplifier
I
Tracking amplifier inverted input
I
Tracking drive output
O
Sled amplifier non-inverted input
I
Sled amplifier inverted input
I
Sled drive output
O
Connect an external capacitance to set the current which determines the Focus search,
I
Track jump, and Sled kick heights
Positive power supply
I
The sled overrun prevention circuit operates when this pin is Low (No pull-up resistance)
I
Serial data transfer clock input from CPU (No pull-up resistance)
I
Lach input from CPU (No pull-up resistance)
I
Serial data input from CPU (No pull-up resistance)
I
Reset input; resets at Low (No pull-up resistance)
I
Track number count signal output
O
Outputs FZC, DFCT1, TZC, BALH, TGH, FOH, ATSC, and others according to the com-
O
mand from CPU
Outputs DFCT2, MIRR, BALL, TGL, FOL,and others according to the command from
O
CPU
Focus OK comparator output
O
Input for the defect bottom hold output with capacitance coupled
I
Defect bottom hold output
O
Connected internally to the interruption comparator input
Connection pin for defect bottom hold capacitor
I
Connection pin for MIRR hold capacitor
I
MIRR comparator non-inverted input
Input for the RF summing amplifier output with capacitance coupled
I
RF summing amplifier output
O
Eye-pattern check point
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Function
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