Sharp CD-BK100W, Service Manual

Page: 47 / 64

– 47 –
CD-BK100W/CD-BP90W
IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (2/2)
44 LVDD Input — L channel Power terminal for L channel.
45 LCHO Output 1/2VDD D/A converter L channel output terminal.
46 LVSS — — Ground terminal for L channel. Surely connected to 0 V.
47 RVSS — — R channel Ground terminal for R channel. Surely connected to 0 V.
48 RCHO Output 1/2VDD D/A converter R channel output terminal.
49 RVDD Input — Power terminal for R channel.
50 XVDD Input — For quartz Power terminal for quartz oscillation.
51 XIN Input Oscillation oscillation Ground terminal of 16.9344 MHz quartz oscillation.
52 XOUT Output Oscillation
53 XVSS — — Ground terminal for quartz oscillation. Surely connected to 0 V.
54 ASLRCK Input — For anti L/R clock input terminal. (When not used, connect to 0 V)
55 ASDACK Input — shock mode Bit clock input terminal. (When not used, connect to 0 V)
56 ASDFIN Input — L/R channel data input terminal. (When not used, connect to 0 V)
57* LRSY Output L For digital L/R clock output terminal.
58* DATACK Output L data output Bit clock output terminal.
59* DATA Output L L/R channel data output terminal.
60* 16M Output Clock output 16.9344 MHz output terminal.
61* SFSY Output L Output terminal of synchronous signal of subcode frame.
It drops when subcode stand by.
62* SBSY Output L Output terminal of synchronous signal of subcode block.
63* PW Output L Output terminal of sub codes P,A,R,S,T,U and W.
64 SBCK Input — Clock input terminal to read sub code. (When not used, connect to 0 V)
65 CE Input — For Chip enable signal input terminal.
66 CL Input — microcomputer Data transmission clock input terminal.
67 DI Input — interface Data input terminal.
68 DO Output L Data output terminal.
69 INT Output H Interruption signal output terminal.
70 WRQ Output H Interruption signal output terminal.
71 RES Input — Reset input terminal of LC78640. When turning on power, set it at "L".
72 DRF Output L Focus ON detection terminal.
73 VDD5V Input — Power terminal for microcomputer interface.
74 VSS — — Ground terminal of digital system. Surely connected to 0 V.
75 CONT6 Input/Output Input mode General purpose input/output terminal 6. Controlled with serial data command
from microcomputer. When not used,
76 CONT7 Input/Output Input mode General purpose input/output terminal 7. set it as the input terminal and
open it by connecting to 0 V, or set it
as the output terminal and open it.
77* V/P Output H Monitor output terminal for automatic switch of rough servo/phase control.
"H" for rough servo, and "L" for phase servo.
78* FSEQ Output L Output terminal synchronous signal detection. "H" is output when
synchronous signal detected by EFM signal matches synchronous signal
internally generated.
79 DEFECT Input/Output Input mode Defect terminal. After resetting, it is configured as an input terminal. It can be
controlled from the outside.
It also becomes a defect monitor terminal under command control
80* EFMO Output Unfixed EFM signal output terminal.
Pin No.
Function
Terminal Name Input/Output Setting in Reset
In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.
Be sure to supply the same potential to each power terminal. (VVDD, ADAVDD, VDD, LVDD, RVDD, XVDD)
Terminal witch is controlled by the power terminal (VDD5 V) for a microcomputer interface :
CE (65 pin), CL (66 pin), DI (67 pin), DO (68 pin), INT (69 pin), WRQ (70 pin), RES (71 pin), DRF (72 pin),
CONT6 (75 pin), CONT7 (76 pin)