Sharp MD-C2 Service Manual page 82

MD-C2
IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (1/2)
Terminal Name Input/Output
Pin No.
1 DEFI
2 TAI
3 PDD
4 VVSS
5 ISET
6 VVDD
7 FR
8 VSS
9 EFMO
10 EFMIN
11 TEST2
12 CLV+
13 CLV-
14 V/*P
15 HLF
16 TES
17 TOFF
18 TGL
19 JP+
20 JP-
21* PCK
22* FSEQ
23* VDD
24 CONT1
25 CONT2
26 CONT3
27 CONT4
28* CONT5
29* EMPH/CONT6
30* C2F
31 DOUT
32* TEST3
33 TEST4
34 PCCL
35* MUTEL/CONT7
36 LVDD
37 LCHO
38 LVSS
39 RVSS
40 RCHO
41 RVDD
42* MUTER/CONT8
43 XVDD
44 XOUT
45 XIN
46 XVSS
47* SBSY
48 EFLG
49* PW
50* SFSY
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input Input terminal of detect detection signal (DEF).
Input For PLL Input terminal for test. Pull-down resistor is integrated.
Output Output terminal of phase comparison for external VCO control.
– Ground terminal for integrated VCO.
AI Resistance connection terminal for current adjustment of PDO output.
– Power terminal for integrated VCO.
AI VCO frequency range adjustment.
– Ground terminal of digital system.
Output For slice level control
Input
Input Input terminal for test. Pull-down resistor is integrated.
Output Output for disk motor control. 3 values can be output with the commands.
Output Output for disk motor control. 3 values can be output with the commands.
Output Monitor output terminal for automatic switch of rough servo/phase control
"H" for rough servo, and "L" for phase servo.
Input Input terminal of track detection signal. Schmit input.
Input Input terminal of tracking error signal. Schmit input.
Output Tracking OFF output terminal.
Output Output terminal for switch of tracking gain "L" increses the gain.
Output Output for track jump control. 3 values can be output with the commands.
Output Output for track jump control. 3 values can be output with the commands.
Output Clock monitor terminal for EFM data replay. 4,3218MHz as phase clock.
Output Output terminal synchronous signal detection. "H" is output when synchronous signal detected
by EFM signal matches synchronous signal internally generated.
– Power terminal of digital system.
In/Output General purpose input/output terminal 1
In/Output General purpose input/output terminal 2
In/Output General purpose input/output terminal 3
In/Output General purpose input/output terminal 4
In/Output General purpose input/output terminal 5
Output Difference monitor terminal At "H", deemphasis disk being replayed.
Output C2 flag output terminal.
Output Output terminal of digital OUTPUT. (EIAJ format)
Input Input terminal for test. Pull-down resistor is integrated.
Input Input terminal for test. Pull-down resistor is integrated.
Input Terminal not used. Open during operation.
Output L channel 1 bit DAC
–
Output
–
– R channel 1 bit DAC
Output
–
Output
– Power terminal for quartz oscillation.
Output Ground terminal of 16.9344MHz quartz oscillator.
Input Ground terminal of 16.9344MHz quartz oscillator.
– Ground terminal for quartz oscillation.
Output Output terminal of synchronous signal of subcode block.
Output Correction monitor terminal of C1, C2, signal and double.
Output Output terminal of subcodes P, A, R, S, T, U and W.
Output Output terminal of synchronous signal of subcode frame. It drops when subcode stands by.
Function
EFM signal output terminal.
EFM signal input terminal.
Controlled with serial data command
from microcomputer.
When not used, set it as the input terminal and
open it by connecting to 0V, or set it as the output
terminal and open it.
Mute outout terminal for L channel.
Power terminal for L channel.
L channel output terminal.
Ground terminal for L channel Surely connected to 0V.
Ground terminal for R channel Surely connected to 0V.
R channel output terminal.
Power terminal for R channel.
Mute output terminal for R channel.
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