Kenwood DP-3010 Service Manual page 37

DP-3010
CIRCUIT DESCRIPTION
(refer to Page 81. (c) CPU Process Flow Chart of Focus
Search Method)
1 During Focus OFF (possible with the Laser Diode
ON/OFF) the SBAD Data is read by the SOSET com-
mand to the internal resister. The Read Level is to be
SBOFF.
5 Next the Zero Cross Point of the FE Signal is detected
This point is the Cross Over Point so the Servo is turned
ON here. Also, FOK is selected after judging whether
Focus has been achieved with the SBAD Signal Level.
68
e TOK 224ms:
DP-3010
CIRCUIT DESCRIPTION
FS2 FS1 sgap > —_-o
rocct po
TA8101N
C_}
oO
a
a
TC9201BF
Diagram 7-24 System Construction Diagram
Correlation Pins: TKIC, TEL1, TEL2, SEL
Commands:
TGASS (8Dxx), TGASR (8Cxx),
TGASET (8Bxx)
Write Command (CM-A)
Command Reception Conditions: DMSV (86xx)
Mode Selector
Tracking Gain
Adjustment Pin
DAC Output
Command Set (FOK =
To be H — Focus ON)
SEL —-7 L | Rome Mie
v
TEL HiZ ace
Vv
TEL2 Hi Z X Bee
Peak Data Hold Peak Data
ZcL1 OST TP 7 a ae «ana! Decode TE Signal DAC Output
(TE)
Waveform
ZCL2
SBAD and RFRP Signals
{SBAD, RFRP) DAC Output Waveform
SBAD --}++—-——-_ RFRP --————-——+f+-—. SBAD
tT
KIC Vop2 Vss ee ee HZ
Command fl {|
TGASS
TGASR
TGASET
k— TrGa ——a
T1Ga: Time intervat is determined by the CPU
Diagram 7-25 Timing Chart (3)
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