Service manual

– 41 –
CD-E700/CD-E77
FUNCTION TABLE OF IC
IC1 VHiLC78646E-1: CD Servo (LC78646E) (1/2)
1 SLCO Output — 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.
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 terminal.
28 SBCK/FG Input — Subcode reading clock input terminal/FG signal input terminal/external
emphasis setting terminal. Terminal functions are set by commands. When
not used, connect 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* MONI3 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 — 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.
Pin No. FunctionTerminal Name
Input/Output Setting in Reset
Controlled by commands from the
microcomputer. When not used, set
them as input terminals and connect
to 0 V, or set them as output
terminals and leave open.
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Left channel
D/A converter
For slice level
control.