Kenwood DP-3010 Service Manual page 18

DP-3010
32
CIRCUIT DESCRIPTION
6. Digital Signal Processing LSI TC9200BF
(X32-1400-10:1C4)
The TC9200BF is an LS! developed for Synchronizing
Detachment, EFM signal demodulation, Error Detection
and Revision.
A simple CD Player Processor can be constructed by using
the TC9200BF.
@ Synchronizing Pattern Detection. Synchronizing Signal
Protection and interpotar operation are made possible
6-1 Block Diagram
EFMI
(3) HOF
Synchronizing Signal
Detachment Circuit
E EFM Signal
Demodulation Circuit
Sub-code
Signa! O
Demodulation
Circuit
Sub-code
Signal P — W
Demodulation
Circuit
EMPH
SUBD
EXCK
SPDA
RAM Address Signal Circuit
Vop
Vss RAW Control Circuit
e@ Equipped with an internal Sub-Code Signa! Demoduia-
tion Circuit. interface with the CPU is easily made
® By using the CIRC Revision Logic, revision capacity of
four C1 and two C2 revision sections (compiete revision
of up to eight frame BUST Error} are available.
® Equipped with +5 Frame Jitter Correction Capacity
@ Equipped with an interna! Muting Signal Detection Cir-
cuit (Smooth Muting Operation with the use of Zero
Cross Detection of the output data)
@ —12 dB attenuation is possible.
DouTt BCK CHCK WDCK SYCK APTL APTR SCDA
TES1
Contro! Data
Resister Gi) TEs2
Data Output
62) TES3
Circuit
Attenuator TESS
Muting Control
Circuit TESS
TES6
Data Correction CKSE
Circuit
CK8M
Timing Circuit 17M0
x-0O
x-+!
4/0-0
0-1
/0-2
70-3
C1 and C2 Error Detection'
Revision Circuit 0-4
0-5
04
0-7
OOD)
6 6°04 68 5
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DP-3010
CIRCUIT DESCRIPTION
jottom Hold
ae
Peak Hold
are used for Track Count information and Search Con-
verged Information
The RF Ripple Signal is achieved by taking the differential
of the RF Signal Peak and Bottom Hold Signals.
In the actual RF Signal there is Low Frequency Fluctuation
but by taking differential, the fluctuation is taken out and
thus a stabilized RFRP wave form is achieved.
(PEAK BOTTOM DET)
Vec
RFRP
VREF
Diagram 5-17 RFRP Signal Producing Circuit
Construction
196 ~ 720kHz
On-Track
a FOTN <a y°
YY WY NA "REP
DFCT2. DFCT1
O5V
—0.5V
O.5V
—0.5V
1v
RERP VREF
-1V
Diagram 5-18 RFERP Signal Operation Wave Form
33