Sharp CD-C831W Service Manual page 41

IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (1/2)
Pin
Terminal Name Input/Output
No.
1 DEFI
2 TAI
3 PDO
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 Input/Output General-use input/output terminal 1.
25 CONT2 Input/Output General-use input/output terminal 2.
26 CONT3 Input/Output General-use input/output terminal 3.
27 CONT4 Input/Output General-use input/output terminal 4.
28* CONT5 Input/Output General-use input/output terminal 5.
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
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input Defect detection signal (DFF) input terminal. (When this terminal is not used, connect it to 0V.)
Input For PLL Input terminal for test. Pull-down resistor built in. Be sure to connect this terminal to 0V.
Output Phase comparison output terminal for external VCO control.
— Grounding terminal for built-in VCO. Be sure to connect this terminal to 0V.
Input Resistor connection terminal for adjustment of PDO output current.
— Power terminal for built-in VCO.
Input For VCO frequency range adjustment.
— Digital system grounding terminal. Be sure to connect this terminal to 0V.
Output For slice level control EFM signal output terminal.
Input
Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
Outout Output for disc motor control. 3-value output is enabled according to command.
Output Output for disc motor control. 3-value output is enabled according to command.
Output Rough servo/phase control automatic selection monitor output terminal.
"H": Rough servo, "L": Phase servo
Intput Track detection signal input terminal. Schmidt input.
Input Tracking error signal input terminal. Schmidt input.
Output Tracking OFF output terminal.
Output Output terminal for tracking gain selection. "L": Gain raising.
Output Output for track jump control. 3-value output is enabled according to command.
Output Output for track jump control. 3-value output is enabled according to command.
Output Clock monitor terminal for EFM data play-back. Phase lock: 4.3218 MHz.
Output Sync signal detection output terminal.
When the sync signal detected from the EFM signal coincides with the internally generated sync
signal: "H"
— Digital system power terminal.
Output Deemphasis monitor terminal. "H": Deemphasis disc play-back. General-use output terminal 6.
Output C2 flag output terminal.
Output Digital OUT output terminal. (EIAJ format)
Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
Input General-use input/output command recognition terminal. Pull-down resistor built in.
When this terminal is used for the same function as that of LC78622E, open or connect this
terminal to 0V.
H: Only the general-use input/output port command is controllable.
L: All command controls are enabled.
Output L channel 1-bit DAC
—
Output
—
— R channel 1-bit DAC
Output
—
Output
— Power terminal for crystal oscillation.
Output 16.9344 MHz crystal oscillator connection terminal.
Input 16.9344 MHz crystal oscillator connection terminal.
— Grounding terminal for crystal oscillation. Be sure to connect this terminal to 0V.
Function
EFM signal input terminal.
Control with serial data command from microcomputer.
When this terminal is not used, set it as an input terminal
and connect to 0V or set it as an output terminal and
open.
Mute output terminal for L channel. General-use output terminal 7.
Power terminal for L channel.
L channel output terminal.
Grounding terminal for L channel. Be sure to connect this terminal to 0V.
Grounding terminal for R channel. Be sure to connect this terminal to 0V.
R channel output terminal.
Power terminal for R channel.
Mute output terminal for R channel. General-use output terminal 8.
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CD-C831W