Sharp CD-DVD500 Service Manual page 64

CD-DVD500
IC3701 VHiTC94A03F-1: Servo ECC (TC94A03F) (3/3)
Terminal Name Input/Output
Pin No.
153 RFRP
154 AVSS
155 TESM10
156 EXTAD
157 VREF
158 FOO
159 TRO
160 AVDD
161 AWCTL
162 FMO
163 DMO
164 TEBC
165* FEBC
166 DPDC
167 EQBC
168 ANMON
169 /DFCT
170 VRCK
171 VSS3
172 SCD
173 SCL
174 SCB
175* FGIN
176 ASLCP
The terminal whose name starts with "/" is activated in "L".
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Servo signal
ADC
from RF amp
Data
RF signal
Slicer
from RF amp
PLL
to RF amp
Input RFRP signal input.
Input Power supply for 3.3 V analog system.
— Test terminal.
Input General-purpose external ADC input.
Input Reference power supply for analog system: 1.65 V.
Output Focus EQ output.
Output Tracking EQ output.
Input Power supply for 3.3 V analog system.
Output Active wide PLL control output.
Output Feed EQ output.
Output Disc EQ output.
Output Tracking balance control signal.
Output Focus balance control signal.
Output Pit depth adjustment signal of DPD error signal.
Output Boost adjustment signal for RF wide area.
Output General-purpose PWM output.
Output Black dot detection signal.
Output RF EQ characteristics control clock.
— 3.3 V digital ground.
Output Head amp serial data.
Output Head amp serial latch pulse.
Output Head amp serial data clock.
Input Disc FG signal input. (with self-bias circuit).
Output Data slice positive output.
to Driver, RF amp
DAC I/F
Servo
DEQ
Control
Digital Servo
Slice
Syndrome
level
operation
Gen.
SYNC Dat.
Demodulation
Figure 64 BLOCK DIAGRAM OF IC
Function
Digital
in
1bit DAC
for
DAC
CD-DA
Micom BUS
ECC
DRAM
I/F
to DRAM
– 64 –
Analog
out
Clock
PLL
Micom
I/F
Output
to DECORDER
I/F
to Micom