Kenwood DP-3010 Service Manual page 36
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
66
CIRCUIT DESCRIPTION
By switching
the two
analog
switches
(FEL1
and
2}
ON/OFF,
the Focus Gain Adjustment
System fixes the
gain from the Focus Servo Open Loop and corrects the
Pick-up
and
Disc
dispersion.
The
three
commands.
FGASS, FGASR
and FGASET are used here. The FGASS
command is the electrical value of VDD2 from the FKIC pin
and the FGASR command
is the Vss electrical value. The
Focus Actuator is moved verticallyimoving the lense far-
ther from and closer to the Disc). During the input of these
commands, FEL1 and 2 forcefully made the VREF electrical
value {with the least gain possible), and also the SEL pin
becomes "H" level. When the SEL pin = "H", the Observa-
tion Signal from the Servo IC, TA8101N. is input in which
the ZCL1
side is an FE signal and the ZCL2 side is the
SBAD signal. Also, when FGASS and FGASR commands
are input, ZCL1 side FE signal will go into Peak Data Hoid
Mode. The FGASET command
determines the Peak Data
Decoding Result to set FEL1 and 2. By using FEL1 and 2,
the amplitude of FEI is adjusted to about 0.8 Vp-p. At this
time the SEL pin will maintain an "H" level where the FKIC
pin will maintain HiZ (operation completed) information.
The intervals and number of times of FGASS and FGASR
commands is set by the CPU and the FGSET command is
output once,
BCD
PeakData
FEL1
FEL2
10
10000
0
0
) 31
10002
0
0
1
100100
0
33~«Ol),s—(ai atti
[4
10100 -—C«OttS 0
b
10101
0
0
16
10110
0
Oo
7
10111
to
18
11000
10
9
Noon
1A
1010
0
1 |
1B
1011
1
1 |
1¢
11100
1
1
1D
mo;
1
1
1
1
IE
io,
1F
mid
1
1
O:FEL=HiZ
1:FEL=Varr
Chart 7-5 FE Signal Peak Data Code Chart
DP-3010
CIRCUIT DESCRIPTION
(2) Focus Search System
TA8101N
TCSTC9201 BF
Focus Coil
Diagram 7-22 System Construction Diagram
Correlation Pins: FCSI, FBRK. SEL
Commands:
SDSET (80xx), FORST (8Fxx),
STRD (1), FOSET (8Exx)
FOCUS (9AF, F.)
F,: FS Resistor Data
F,: FCOK Resister Data
Command
Reception Conditions: LDON(84xx) Command
Set
Servo ON
{
Mode Selector
SEL
H
FCSE
L
H
FE
{FE Level Detection
Judgement that
Servo is not
t in operation
rag
tee
'Lihe=—y
pe See
Output Inverse Signal used as the
Focus Actuator Brake Signal
STRD
ZCL1 VReF(10000)
Information)
+f
(FE, TE)
2F 2 (FOK Judgement
T
DAC Output
-
Information)
S
2CL2
~--—
TTT
TT
a.
ot rit
(SBAD)
v7
WLliiljitiwdiiise
rag.
Hiz
FBRK
ae
as
eae
(Brake Signal}
9
vj
Fo
REF
{Focus Servo Signal)
FOK
UREA TE
Focus ON/OFF
24msec
Judgement Command
a
obe
Be
7)
ce
Oe
3 Se
ge
FORST
Tes: Time interval is determined by the CPU
Diagram 7-21
Timing Chart (2)
67
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