Pioneer deh-p980bt Service Manual page 130

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QQ
3 7 63 1515 0
Fig.1.2.2 Timing chart for focus close operations
1.2.2 Tracking servo system
The main equalizer of the tracking servo consists of the digital equalizer block. The figure 1.2.3 shows the block diagram
TE
L 13942296513
of the tracking servo system.
IC201 UPD63763CGJ
E
130
F
129
Fig.1.2.3 Block diagram of the tracking servo system
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Output from FD terminal
FE controlling signals
You can ignore this for blind periods.
FSS bit of SRVSTS1 resistor
RFOK signals
TE
A/D
AMP
JUMP
PARAMETERS
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y
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Search start
The broken line in the figure is assumed in the
A blind period
case without focus servo.
The status of focus close is judged from the statuses
of FSS and RFOK after about 10 mS.
Q Q
3 6 7 1 3 1 5
DIG.
EQ
PWM
CONTROL
co
.
CX-3164
7
9 4 2 8
0 5 8 2 9 9 4
IC301 BA5835FP
TOP
13
TD
103
3
TOM
14
m
7
8
9 9
A
B
C
2 8 9 9
D
LENS
E
F
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