Service manual

 29 
1 FIN2 I
For the connection of the pickup photodiode. Addition to the FIN1 pin creates an RF
signal and subtraction from it create an EF signal.
2 FIN1 I For the connection of the pickup photodiode.
3EI
For the connection of the pickup photodiode. Subtraction from the F pin creates a TE
signal.
4 F I For the connection of the pickup photodiode.
5 TB I Inputs the DC components in the TE signal.
6 TE I
For the connection of a resistor which sets the gain of the TE signal between this pin
and the TE pin.
7 TE O TE signal output.
8 TESI I TES (track error sense) comparator input. The TE signal is passed through a BPF.
9 SCI I Shock detection input.
10 TH I Sets the time constant for the tracking gain.
11 TA O TA amp output.
12 TD I Composes the tracking phase compensation constant between the TD and VR pins.
13 TD O Sets the tracking phase compensation.
14 JP I Sets the amplitude of the tracking jump signal (kick pulses).
15 TO O Tracking control signal output.
16 FD O Focusing control signal output.
17 FD I Composes the focusing phase compensation constant between the FD and FA pins.
18 FA O Composes the focusing phase compensation constant between the FD- and FA- pins.
19 FA I Composes the focusing phase compensation constant between the FA and FE pins.
20 FE O FE signal output.
21 FE I
For the connection of a resistor whichs sets the gain of the FE signal between this pin
and the TE pin.
22 A-GND  Ground of analog signals.
23 NC  Not connected.
24 SP O Single-ended output of the signals input to the CV+ and CV- pins.
25 SPG I For the connection of a resistor which sets the gain in the spindle 12cm mode. (Not used)
26 SP I For the connection of the spindle phase compensation constant with the SPD pin.
27 SPD O Spindle control signal output.
28 SLEQ I For the connection of sled phase compensation constant.
29 SLD O Sled control signal output.
30 SL
I Sled feed signal input from the microprocessor.
31 SL+
32 JP
I Tracking signal input from the DSP.
33 JP+
34 TGL I Tracking gain control signal input from the DSP. Low gain when TGL is "H".
35 TOFF I Tracking off control signal input from the DSP. Off when TOFF is "H".
36 TES O Outputs the TES signal to the DSP.
37 HFL O
The HFL (high frequency level) signal is used to judge whether the main beam is positioned
on the pit or on the mirror.
Description
Pin No.
Pin Name I/O
IC, LA9241ML