Service manual
CD-C471
W
FUNCTION TABLE OF
IC
IC2
VHiLC78622K-1
Servo/Signal
Control(LC78622K)
(l/2)
Pin No.
/
Terminal Name
1
Input/Output
1
Function
I
1
DEFI
Input Input terminal of defect
detectron
signal (DEF). (Connected to OV when not used.)
2
TAI Input
For PLL Input terminal for test. Pull-down resistor is integrated. Surely connected to OV.
3
PDO
output
Output terminal of phase comparison for external VCO control.
4
vvss
-
Ground terminal for integrated VCO. Surely connected to
OV.
5
ISET
input Resistance connection terminal for current adjustment of PDO output.
6
VVDD
-
Power terminal for integrated VCO.
7 FR
input
VCO
frequencv
ranqe
adjustment.
8
vss
9
EFMO
10
EFMIN
11.
TEST2
12
CLV+
-
output
Input
Input
Outout
Ground terminal of digital system. Surely connected to
OV.
For slice level control
EFM signal output terminal.
EFM signal input terminal.
Input terminal for test. Pull-down resistor is integrated. Surely connected to OV.
Outout
for disk motor control. 3 values can be
outout
with the commands.
I 13
I
CLV-
I
Outrlut
1
Outout
for disk motor control. 3 values can be
outout
with the commands.
~
1
1
14
1
V/P
/
output
1
Monitor output terminal for automatic switch of rough servo/phase control.
“H”
for
rouah
servo. and
“L”
for
ohase
servo.
I
15
HLF
16
TES
17
TOFF
18
TGL
19
JP+
lntput
Input
output
output
output
Input terminal of track detection signal.
Schmit
input.
Input terminal of tracking error signal.
Schmit
input.
Tracking OFF output terminal.
Output terminal for switch of tracking gain
“L”
increases the gain.
Output for track jump control. 3 values can be output with the commands.
20
I
JP-
j
output
1
Output for track jump control. 3 values can be output with the commands.
21’
22’
PCK
FSEQ
output
output
Clock monitor terminal for EFM data replay.
4,3218MHz
as the phase clock.
Output terminal synchronous signal detection.
“H”
is output when synchronous signal detected
by EFM signal matches synchronous signal internally generated.
23
VDD
-
Power terminal of diaital svstem.
24
CONTl
25
CONT2
26 CONTB
27
28’
29*
30*
CONT4
CONTS
EMPH
C2F
Input/Output General purpose input/output terminal
1
Controlled with serial data command
input/Output General purpose input/output terminal 2
from micro computer.
Input/Output General purpose input/output terminal 3
When not used, set it as the input terminal and
open it by connecting to OV, or set it as the output
input/Output General purpose input/output terminal 4
terminal and open it.
Input/Output General purpose input/output terminal 5
output Difference monitor terminal At
“H”,
deemphasis disk is being replayed.
OUtDUt
C2
flaa
outout
terminal.
I 31
/
DOUT
1
Outout
1
Outout
terminal of
diaital
OUTPUT.
(EIAJ
format)
I
32*
33
TEST3
TEST4
Input
Input
Input terminal for test. Pull-down resistor is integrated. Surely connected to
OV.
input terminal for test. Pull-down resistor is integrated. Surely connected to OV.
34
1
N.C.
-
Terminal not used. Open during operation.
1
35* MUTEL
36 LVDD
37 LCHO
38 LVSS
39
RVSS
40
RCHO
41
RVDD
42*
MUTER
43 XVDD
output
L
channel 1 bit DAC
Mute output terminal for
L
channel.
-
Power terminal for
L
channel.
output
L
channel output terminal.
-
Ground terminal for
L
channel Surely connected to
OV.
-
R
channel 1 bit DAC
Ground terminal for
R
channel Surely connected to OV.
output
R
channel output terminal.
-
Power terminal for
R
channel.
output
Mute output terminal for
R
channel.
-
Power terminal for quartz oscillation.
1
44
XOUT
45
XIN
46
xvss
output
Ground terminal of 16.9344 MHz quartz oscillator.
Input
Ground terminal of 16.9344 MHz quartz oscillator.
-
Ground terminal for
auartz
oscillation.
Surelv
connected to OV.
47*
SBSY
output
Output terminal of synchronous signal of
subcode
block.
4a*
EFLG
output
Correction monitor terminal of Cl,
C2,
single and double.
In this unit, the terminal with asterisk mark
(*)
is (open) terminal which is not connected to the outside.
-44-