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CDP-502ES/620ES
SECTION
1
OUTLINE
CIRCUIT
DESCRIPTION
1-1, OUTLINE
10101
1C601
1C603
CX20109
CX23035
CX23034
D/A
LINE OUT
AMP
1¢501
CX20108
uv
SERVO N
KEY INPUT
TRACK
{ REMOTE CONTROL
JUMP
INPUT
Above block diagram shows configuration of this
set.
Master control IC (IC702) serves as the center of
all operation.
Master
control
IC (IC702)
assumes
interface
between.
man
and machine
like key input
and
remote
control
input.
Mechanical
control
IC
(IC701) assumes interface between master control IC
(IC702) and machine,
For example, if PLAY button is pressed from key
input, master control (IC702) gives mechanical con-
trol IC (1C701).a
command
to make PLAY
mode.
When. this command
is given, mechanical control IC
(IC701) works in routine operation to make PLAY
mode.
It gives every kind of commands for ICS501,
601 and they are in PLAY mode.
Through [C501
and IC601 use common
data bus,
they distinguish
a command
for IC501 or IC601 by
a higher rank 4 bit value of each command
from
mechanical control IC (IC701).
Command for ICS01:
higher rank 4 bit 0000-0011
(0-3 with sexadecimal number system) are used.
Command
for IC601: higher rank 4 bit 1010-1110
(A-E with sexadecimal number system) are used.
IC501
controls servo (focus, tracking, sled) mainly.
IC601 checks EFM demodulation and CRC.
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