Read Sharp DV-NC55 (serv.man11) Service Manual online
74
DV-NC55S/H
DV-NC60H
DV-NC60H
DAC I/F
DAC
1bit DAC
for
CD-DA
Clock
PLL
Micom
I/F
Micom BUS
Servo
Control
DEQ
ADC
Digital Servo
Data
Slicer
PLL
Slice
level
Gen.
Syndrome
operation
ECC
Output
I/F
DRAM
I/F
SYNC Det.
Demodulation
Servo signal
from RFamp
from RFamp
RF signal
from RFamp
from RFamp
to RFamp
to DRAM
to DECORDER
to Micom
Analog
out
Digital
in
to Driver, RFamp
• Block Diagram
Pin No. Terminal Name In/Output
Operation function
3/5V system
Remarks
156
EXTAD
Input
General-purpose external ADC input
3V system
Analog input terminal
157
VREF
–
Reference power supply for analog system
3V system
only: 1.65V
158
FOO
Output
Focus EQ output
3V system
Analog output terminal
159
TRO
Output
Tracking EQ output
3V system
Analog output terminal
160
AVDD
–
Power supply for 3.3V analog system only
–
161
AWCTL
Output
Active wide PLL control output
3V system
Analog output terminal
162
FMO
Output
Feed EQ output
3V system
Analog output terminal
163
DMO
Output
Disc EQ output
3V system
Analog output terminal
164
TEBC
Output
Tracking balance control signal
3V system
Analog output terminal
165
FEBC
Output
Focus balance control signal
3V system
Analog output terminal
166
DPDC
Output
DPD error signal/pit depth adjustment signal 3V system
Analog output terminal
167
EQBC
Output
RF wide boost adjustment signal
3V system
Analog output terminal
168
ANMON
Output
General-purpose PWM output
3V system
Analog output terminal
169
/DFCT
Output
Black dot detection signal
3V system
170
VRCK
Output
RF EQ property control clock
3V system
171
VSS3
–
3.3V digital ground
–
172
SCD
Output
Head amplifier serial data
173
SCL
Output
Head amplifier serial data latch pulse
3V system
174
SCB
Output
Head amplifier serial data clock
3V system
175
FGIN
Input
Disc FG signal input
3V system
Feedback resistor
(with self-bias circuit)
Analog input terminal
176
ASLCP
Output
Data slice positive pole output
3V system
Analog output terminal
Note) Terminals with "/" at the beginning of their names are active "L" ones.
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