Block Diagram - Technics SJ-MD100 Service Manual

SJ-MD100

Block Diagram

DISC
Traverse
Spindle
motor
motor
Loading motor
Detection SW
FL display
Operation SW
OPTIAL OUT
OPTIAL IN
LINE IN
LINE OUT
H.P. OUT
1kHz, 0dB
VOLUME CENTER
*1 Kerr effect
A phenomenon in which the polarization plane of laser light reflected from a material shifts in one of two directions
depending upon its "plus" or "minus" magnetic polarization.
*2 ACIRC Add on interleave CIRC
The aim of Add-on interleave is to improve the resistivity in CD-ROM decoder from the burst error on the disc.
*3 ATRAC Adaptive Transform Acoustic Cording
The digital data compressing system developed for MiniDisc in which audio signals can be reproduced with only about
1/5 in the data normally required for high fidelity reproduction th
*4 Curie temperature
The temperature at which magnetism of a specific material dissipates. This temperature varies according to the material.
*5 UTOC User Table Of Contents
Found only on recordable MiniDiscs, this area contains subdata (track number, etc.) which can be rewritten by the user.
Magnetic
Magnetic head
head Drive Q10,11
0.45V
P-P
0.5¨s. 50mV/DIV.
38 RF
Optical
IC1 AN8772
pickup
39
4ch driver IC
IC2 AN8814
Loading drive
IC92 LB1830
Clock
10.02MHz
System control
IC901
M30218
Clock
10MHz
Buffer AMP
IC751 BA4560
Head Phone AMP
IC801 M5218
170mV
P-P
Play signal
73
0.9V
P-P
MD LSI
0.5¨s. 0.1V/DIV.
IC3
EFM
IC
32 97
ATRAC
Servo signal processor
70
69 71
System control
IC10
MN101D03D
8
Interface
IC401 TC74HTC7007
9
20bit AD /DA converter
IC601 AK4520
5
3
6.2V
P-P
1kHz, 0dB
Buffer AMP
IC711
REC signal
– 10 –
DRAM(4Mbit)
IC72 MNV4400
1 2 24 25
Clock
16.9334MHz
43 44 45 46
MN66616
mod/demo
encoder /
decoder
65
64
3.2V
3.2V
0V
0.5¨s. 1V/DIV.
0V
. .
T = 11¨s.
2
Interface IC402
TC74HC4050
3
3
3.2V
0V
4
0.2¨s. 2V/DIV.
4.8V
0V
. .
T = 0.34¨s.
4.8V
Clock
0V
0.2¨s. 2V/DIV.
generator
IC501
13 14
TC9246
1kHz, 0dB
BA4560
Clock line Control line
3.2V
P-P