Kenwood DP-3010 Service Manual page 32
Compact disc player
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Also See for DP-3010:
- Instruction manual (20 pages) ,
- Instruction manual (21 pages) ,
- Instruction manual (20 pages)
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DP-3010
CIRCUIT DESCRIPTION
@CLV Servo Circuit
alts
Disc Motor Driver
Feed Motor Driver
Tracking Coil Driver
TA8101N
TSO
TC9201 BF
Diagram 7-11
System Construction Diagram
© Correlation
Pins:
DMPC, DMFC, DMON
© Commands:
DMSV (86xx), DMOFF (87xx).
DMBK (96xx), DMFK (97 xxi,
SETRO (98R1R2), SETR1
{9ER3R4}), STRD (1)
Command
Reception Conditions
The system is designed so that the AFC and APC informa-
COMMAND | RECEPTION CONDITION
OPERATION
tion needed for the Disc Motor is acquired from the Preser-
DMSV
ree Focus ON!
CLV Servo ON
vo Mode and Main Servo Mode which are divided on the
DMOFF
=
Disc Motor Stop
CLV Servo Board.
a t
a e
DMBK
—_|DMSV Cz™mand Set
[Disc Motor Brake
sae ee
examples
shown
in Diagrams
DMFK
LDON Cz~mand Set"
Disc Motor Speed Up
* When the DMSV
Command
is not operating, DMFK Command
is
used,
Note: Each Command information (Information Details are shown in
{CM-C])
Rs
|
RS
1
|
ESGL
APCG1
ESGM
APCG2
1
WSEG
DMG
DMON OUTPUT
MODE
DMPC OUTPUT
DMG DATA
CONDITIONS
DMFC
OUTPUT
pwn
NOTES
During fypucor
Pre Servo
Tracking
Serve
OFF
Double value
output "H"
or°L"
Output
AFC2 Circuit
ON
1 DMSV Command
2 DMFK Command
3 DMBK Command
Main Servo
AFCS=L
Tracking
Servo ON
Phase Polar Info
Tri-state
Quiput
Diagram 7-2 CLV Servo Mode Division
PWM
Output
(AFC1 Circuit ON)
Vrer Fixed
During Input of
NKICO Command
(Play Command}
VrReF = +2.2V
DP-3010
CIRCUIT DESCRIPTION
ee
| cee |
Vpo2
aie ake,
pmPc
—
c
Vss_
f .
j
k- Tapc 4
yf
Vss
ed
(+2.2V)
DMFC
VREF
Vss
60ue
AFCS
H
L
DMG = 1(VpReEF)
OMON
VREF
DMG=otHiz)
|
|
Bate
\
Command j
{
H
ot
3
TGA etc.
°
Play
Zt
a
z
_—
Pre Servo (Tracking OFF)
a
es
CLV Servo (Tracking ON)
=
Diagram 7-12 CLV Servo Timing Example 1
{During DMS Command Input)
HiZz
pmpc
——-
-
-_—-
Vpp2
DMFC
=
[-
v.
VREF
Ss
BRKR
L
L
I
|
I
'
AFCS
t
H
|
L
vate
DMG = 1
;
E
;
DMON
Hi Z
Hiz
VREF
Hi2
DMG =0
| Detect when more than 22T
teenena| Be
ed
Le
a
z
&
FA & rd
rd
&
rd
c
ue
BRKR Data Check with
a
g a
2 no
a
a
b
&
2 3
STRD Read Command
fay
Diagram 7-13 CLV Servo Timing Example 2
(DMFK Command Input)
Diagram 7-13 CLV Servo Timing Example 3
(DMBK Command Input)
The following is an explanation of the Pre Servo Mode and
the Main Servo Concept.
Details about the CLV Servo Operations will be explained
in Items 1} ~ 4) about AFCS, AFC, APC and Brake Cancel
Signal Producing Circuits.
@ Pre Servo Mode
When the DMSV Command
(CLV Servo ON) is input.
after the Focus has be achieved, the Disc Motor will
start to revolve.
Pre Servo Mode takes the turning speed (Frequency
Range)
to within
the
Digital
PLL
Capture
Range
(about 1%)
® Main Servo Mode
When the NKICO Command (Play Command) is input,
after the tracking gain adjustment
is complete with
the Pre Servo Mode
conditions,
both the Tracking
Servo and Feed Motor Servo come ON.
When
the Tracking Servo comes
ON, the Synchro-
nized Division Circuit will start and the AFCS
will
switch from "H" to "L" level, thus going into Main
Servo Mode.
59
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