Aiwa CA-DW735M Service Manual page 20

SCHEMATIC DIAGRAM-4 (Q-SOUND SETION)
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IC DESCRIPTION
IC, LA9240M
Pin No. Pin Name I/O
Pin to which external pickup photo diode is connected. RF signal is created by adding
1 FIN2 I
with the FIN1 pin signal. FE signal is created by subtracting from the FIN1 pin signal.
2 FIN1 I Pin to which external pickup photo diode is connected.
Pin to which external pickup photo diode is connected. TE signal is created by
3 E I
subtracting from the F pin signal.
4 F I Pin to which external pickup photo diode is connected.
5 TB I DC component of the TE signal is input.
6 TE– I Pin to which external resistor setting the TE signal gain is connected between the TE pin.
7 TE O TE signal output pin.
TES "Track Error Sense" comparator input pin. TE signal is passed through a band-
8 TESI I
pass filter then input.
9 SCI I Shock detection signal input pin.
10 TH I Tracking gain time constant setting pin.
11 TA O TA amplifier output pin.
Pin to which external tracking phase compensation constants are connected between
12 TD– I
the TD and VR pins.
13 TD I Tracking phase compensation setting pin.
14 JP I Tracking jump signal (kick pulse) amplitude setting pin.
15 TO O Tracking control signal output pin.
16 FD O Focusing control signal output pin.
Pin to which external focusing phase compensation constants are connected between
17 FD– I
the FD and FA pins.
Pin to which external focusing phase compensation constants are connected between
18 FA I
the FD– and FA– pins.
Pin to which external focusing phase compensation constants are connected between
19 FA– I
the FA and FE pins.
20 FE O FE signal output pin.
21 FE– I Pin to which external FE signal gain setting resistor is connected between the FE pin.
22 A–GND — Analog signal GND.
23 SP O Single ended output of the CV+ and CV– pin input signal.
24 SPI O Single ended output of the CV+ and CV– pin input signal.
25 SPG I Pin to which external spindle gain setting resistor in 12 cm mode is connected.
Pin to which external spindle phase compensation constants are connected together
26 SP– I
with SPD pin.
27 SPD O Spindle control signal output pin.
28 SLEQ I Pin to which external sled phase compensation constants are connected.
29 SLD O Sled control signal output pin.
30, 31 SL–, SL+ I Sled advance signal input pin from microprocessor.
32, 33 JP–, JP+ I Tracking jump signal input pin from DSP.
34 TGL I Tracking gain control signal input from DSP. Low gain when TGL = H.
35 TOFF I Tracking off control signal input pin from DSP. Off when TOFF = H.
Description
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