Sharp XL-520W Service Manual page 38

XL-520W/CP-520
IC802 VHiTC9284BF-1:Servo/Signal Control (TC9284BF) (1/2)
Port Name
Pin No.
1 GNDA
2 RO
3* RO
4 VDA
5* LO
6 LO
7 GNDA
8*-10* TEST3-TEST5
11* SBOK
12 VDD
13 GND
14-17 BUS0-BUS3
18 CCE
19 BUCK
20* PFCK
21 RST
22* SUBSYC
23* SUBD
24* CLCK
25 VDD
26 GND
27* DFCT
28,29 TEL2,1
30 TGUL
31*,32 TGUH2,1
33 TKIC
34 FMON
35* TEST1
36 FMFB
37* TEST
38 DMON
39 DMFC
40 DMPC
41 2VREF
42 SEL
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input/Output
— Analog grand terminal fo DA vonverter (R channel)
Output R channel data forward output terminal.
Output R channel data reverse output terminal.
— Analog power supply terminal for DA converter.
Output L channel data reverse output terminal.
Output L channel data forward output terminal.
— Analog grand terminal for DA converter (L channel)
Input Test terminal. Normally, keep at "H" level or open.
Output Subcode Q data CRC check adjusting result output terminal.
The adjusting result is OK at "H" level.
— Digital supply voltage terminal. (+5V)
— Digital ground terminal.
In/Output Command and data sending/receiving input/output terminals.
Input Command and data sending/receiving chip enable signal input terminal.
The bus line becomes active at "L" level.
Input Command and data sending/receiving clock input terminal.
Output Regeneration system frame periodic signal output terminal. 7.35 kHz
Input Reset input terminal. The internal system is reset at "L" level.
Output Subcode sync signal output terminals.
Output Subcode P~W output terminals.
Input Subcode P~W data readout clock input terminal.
— Digital supply voltage terminal.
— Digital ground terminal.
Output Defect detection signal output terminal. VREF when defect is detected. Normally, HiZ.
Output Tracking gain adjusting analog switch output terminals VREF or Hiz.
Output Tracking servo loop low frequency phase compensator change-over analog switch output
terminal. HiZ (gain up) when detecting shock. Normally, VREF.
Output Tracking servo loop middle/high frequecy phase compensator change-over analog switch
output terminals. HiZ (gain up) when detecting shock. Normally, VREF. TGUH1 is used at
normal regeneration and TGUH2 is used at double speed regeneration.
Output Tracking actuator kick signal output terminal. Kicks in the outer circumferential direction ar "H"
level and in the inner circumferential direction at "L" level.
Output Feed servo ON/OFF analog switch output terminals.
Servo on at "Hiz".
Input Test terminal. Normally, keep at "H" level or open.
Output Feed motor FWD/BWD feeding control signal output terminal. Feed in the outer circumferential
direction at "H" level and in the inner circumferential direction at "L" level.
Input Test terminal. Normally, keep at "H" level or open.
Output Disc motor driving circuit gain change-over analog switch output terminal.
Output Disc motor CLV servo AFC signal output terminal.
COMMAND
DMFK
DMSV
DMBK
DMOFF
Output Disc motor CLV servo APC signal output terminal.
Input Double times reference voltage input terminal. (VREF x2)
Output Servo mode indicating signal output terminal.
SEL LD ON/OFF
L
HiZ
H
Function
Servo off at "VREF".
DMFC OUTPUT
H
PWM
L
VREF
FOCUS SERVO
OFF OFF
ON OFF
ON ON
– 38 –
OPERATION
Motor acceleration
CLV servo ON
Motor deceleration
CLV servo OFF
OPERATION
LD OFF
Focus Search
Normal play, etc.
Focus Servo ON : FOK