service information for eeprom ic setting - Jordans Manuals
service information for eeprom ic setting - Jordans Manuals
service information for eeprom ic setting - Jordans Manuals
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3. SIGNAL DETECTION OF THE P/U<br />
Infrared Iaser<br />
P<strong>ic</strong>k-Up module<br />
Focusing<br />
Photo Diode<br />
Tracking<br />
1) Focus Error Signal ==> (A+C)-(B+D)<br />
This signal is generated in RF IC (LIC121 : AN22113A) and controls the p<strong>ic</strong>k-up’s up and down to focus on<br />
Disc.<br />
2) Tracking Error Signal (DPP Method) ==> {(A+D)-(B+C)}- k x {(EF1+EF4)-(EF2+EF3)}<br />
This signal is generated in RF IC (LIC121 : AN22113A) and controls the p<strong>ic</strong>k-up’s left and right shift to find<br />
to track on Disc.<br />
3) RF Signal ==> (A+B+C+D)<br />
This signal is converted to DATA signal in DSP IC (LIC201 : MN103SA6G).<br />
Track Center<br />
Tp/2<br />
Sub1<br />
F,E<br />
Main<br />
D,C<br />
A,B<br />
Sub2<br />
H,G<br />
Tp<br />
Offset<br />
k[(F+H) - (E+G)]<br />
(A+D) - (B+C)<br />
TE<br />
(A+D) - (B+C) - k[(F+H) - (E+G)]<br />
4-33
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