M62475FP 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M62475FP

AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER

MITSUBISHI ELECTRIC  

MITSUBISHI SOUND PROCESSOR ICs

M62475FP

AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER

CONTROL METHOD FLOWCHART EXAMPLE

Note: Since this description applies to an example on the item

related to the servo, take into account the entire system when

using this. In addition, pay attention to the

simplification/reduction of actions in abnormal status.

1 POWER_RESET

2 DISC_START

3 BALANCE_ADJ

4 TRACK_ADJ

5 FOCUS_ADJ

6 ADJUST

7 SE_OUT

8 Jump control

8-1. SINGLE_JUMP

8-2. SHORT_JUMP

8-3. MID_JUMP

8-4. LONG_JUMP

:Processing with power turned on

:Disk start processing

:Track balance processing

:Track gain adjustment

:Focus gain adjustment

:Adjustment routine

:Adjustment signal output routine

1 POWER_RESET

POWER_RESET

System initialization

2 DISC_START

DISC_START

Pick-up innermost

NO

circumference ?

YES

Move pick-up to outside

[00000010] sending

Spindle motor rotation start

Wait 50

msec

FOCUS ON sending

[00100000]

NO

Data Out=0 ?

YES

Track servo ON

[00101111] sending

Move inside

[00000001] sending

FOCUS servo

check

Set adjustment initial value

(Send the default value)

BAL=100

FOC=100

TRA=100

END

Note:BAL :Track balance

FOC :Focus gain

TRA :Track gain

FOCUS_ADJ

BALANCE_ADJ

HFD=0

Focus gain preparatory adjustment

Track balance conflict adjustment

CRC=1 ?

YES

TRACK_ADJ

FOCUS_ADJ

BALANCE_ADJ

NO

DSP read check

Tracking gain adjustment

Focus gain adjustment

Track balance adjustment

END

Note:Pick-up servo operation preparatory completion. For example,

reading TOC requires to move pick-up to the innermost circumference.

MITSUBISHI

ELECTRIC

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