Sharp 27DV-S100 Service Manual page 89

27DV-S100
27DV-CS10
Pin No. Terminal Name In/Output
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
Note) Terminals with "/" at the beginning of their names are active "L" ones.
• Block Diagram
Servo signal
ADC
from RFamp
Data
RF signal
Slicer
from RFamp
PLL
to RFamp
Operation function
Input General-purpose external ADC input
– Reference power supply for analog system
only: 1.65V
Output Focus EQ output
Output Tracking EQ output
– Power supply for 3.3V analog system only
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 DPD error signal/pit depth adjustment signal 3V system
Output RF wide boost adjustment signal
Output General-purpose PWM output
Output Black dot detection signal
Output RF EQ property control clock
– 3.3V digital ground
Output Head amplifier serial data
Output Head amplifier serial data latch pulse
Output Head amplifier serial data clock
Input Disc FG signal input
(with self-bias circuit)
Output Data slice positive pole output
to Driver, RFamp
DAC I/F
Servo
DEQ
Control
Digital Servo
Slice
Syndrome
level
operation
Gen.
SYNC Det.
Demodulation
3/5V system
3V system
3V system
3V system
3V system
–
3V system
3V system
3V system
3V system
3V system
3V system
3V system
3V system
3V system
–
3V system
3V system
3V system
3V system
Digital Analog
in
out
1bit DAC
DAC
for
CD-DA
Micom BUS
ECC
DRAM
I/F
to DRAM
90
Remarks
Analog input terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Analog output terminal
Feedback resistor
Analog input terminal
Analog output terminal
Clock
PLL
Micom
to Micom
I/F
Output
to DECORDER
I/F