Service manual

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