SD-EX220H
8 – 1
Audio
SD-EX220H
Service Manual
Market
E
CHAPTER 8.
OTHER
[1] Function table of IC
IC1 VHiLC78646E-1: CD Servo (LC78646E) (1/2)
In this unit, the terminal with asterisk mark (*) is (open) terminal whitch is not connected to the outside.
Pin No.
Terminal Name
Input/Output
Setting in Reset
Function
1
SLCO
Output
—
For slice level
control.
Control output.
2
SLCIST
Input
—
Resistor connection terminal for SLCO output current setting.
3
EFMIN
Input
—
RF signal input terminal.
4
RF
Output
—
RF signal monitor terminal.
5
RFVDD
Input
—
RF power terminal.
6
RFVSS
—
—
RF earth terminal. To be connected to 0 V.
7
FIN1
Input
—
A+C signal input terminal.
8
FIN2
Input
—
B+D signal input terminal.
9
TIN1
Input
—
E signal input terminal.
10
TIN2
Input
—
F signal input terminal.
11
VREF
Output
RFVDD/2
VREF voltage output terminal.
12
REF1
Input
—
Reference supply setting terminal.
13*
FE
Output
ZHI
FE signal monitor terminal.
14
TEC
Output
—
LPF capacitor connection terminal for TE signal.
15*
TE
Output
ZHI
TE signal monitor terminal.
16*
RFMON
Output
ZHI
RF internal signal monitor terminal.
17
JITTC
—
—
Capacitor connection terminal for jitter detection.
18
ADAVDD
Input
—
Power terminal for servo A/D, D/A.
19
ADAVSS
—
—
Earth terminal for serve A/D, D/A. To be connected to 0 V.
20
TDO
Output
ADAVDD/2
Output terminal for tracking control. D/A output.
21
FDO
Output
ADAVDD/2
Output terminal for focus control. D/A output.
22
SPDO
Output
ADAVDD/2
Output terminal for spindle control. D/A output.
23
SLDO
Output
ADAVDD/2
Output terminal for sled control. D/A output.
24*
GPDAC
Output
ADAVDD/2
Servo D/A general-purpose output terminal.
25
CONT4
Input/Output
Input Mode
General-purpose I/O terminal 4.
Controlled by commands from the micrcom-
puter.
When not used, set them as input terminals
and connect to 0 V, or set them as output
terminals and leave open.
26
CONT5
Input/Output
Input Mode
General-purpose I/O terminal 5.
27*
SBCK/CONT6
Input/Output
Input Mode
General-purpose I/O terminal 6 or
Subcode reading clock input ter-
minal.
28
SBCK/FG
Input
—
Subcode reading clock input terminal/FG signal input terminal/external emphsis
setting terminal.
Terminal functions are set by commands.
When not used, conect to 0 V.
29*
DEFECT
Output
L
Defect terminal.
30*
V/*P
Output
H
Auto switching monitor output terminal for rough servo phase control.
“H”: rough servo, “L”: phase servo.
31*
FSEQ
Output
L
Sync signal detection output terminal.
The status changes to “H” when the sync signal detected in EFM and the sync
signal of internal generation are identified.
32*
MONI1
Output
L
Internal signal monitor terminal 1.
33*
MONI2
Output
L
Internal signal monitor terminal 2.
34
DE_EMPH
Output
L
Internal signal monitor terminal 3.
35*
MONI4
Output
L
Internal signal monitor terminal 4.
36*
MONI5
Output
L
Internal signal monitor terminal 5.
37
VSS
—
—
Digital system earth terminal. To be connected to 0 V.
38
VDD
Input
—
Digital system power terminal.
39
DOUT
Output
L
Digital OUT output terminal. (EIAJ format)
40
TEST
Input
L
Input terminal for test. To be connected to 0 V.
41
LVDD
Input
—
Left channel
D/A converter
Power supply for Left channel.
42*
LCHO
Output
LVDD/2
Left channel output.
43
LVSS
—
—
GND for Left channel. Must be connected to 0 V.
44
RVSS
—
—
Right channel
D/A converter
GND for Right channel. Must be connected to 0 V.
45*
RCHO
Output
LVDD/2
Right channel output.
46
RVDD
Input
—
Power supply for Right channel.
47
XVDD
Input
—
Crystal
Oscillator
Power supply for crystal oscillator.
48
XOUT
Output
—
Connected for the 33.8688 MHz crystal oscillator cement.
49
XIN
Input
—
