Philips 22RC026/00 - IC Circuit Descriptions (Continued); IC650 - LA9240 MS Terminal Functions

IC CIRCUIT DESCRIPTION
IC650 - LA9240MS
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PINNo.
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PART
NAME
EXPLANATION
Pickup photo-diode connecting pin. Forms RF signal by addition to FIN1 pin, and FE signal by subtrac:
tion.
Pickup photo-diode connecting pin.
Pickup photo-diode connecting pin. Forms TE signal by subtraction from F pin.
Pickup photo-diode connecting pin.
Pin for inputting DC constituent of TE signal.
Pin for connecting gain setting resistence of TE signal to TE pin.
TE signal output pin.
TES (TRACK ERROR SENCE) comparator input pin. Band Pass TE signal, and input.
Input pin for shock detection.
Constant setting pin at the time of tracking gain.
Pin for connecting high pass elimination condensor of servo.
Pin for constituting tracking phase compensation constant between TD and VR pin.
Pin for setting tracking phase compensation.
Pin for setting tracking jump signal (kick pulse) amplitude.
Tracking control signal output pin.
Focusing contro! signal output pin.
Pin for constituting focussing phase compensation constant between FD and FA pin.
Pin for constituting focussing phase compensation constant between FA- and FE- pin.
Pin for constituting focussing phase compensation constant between FA and FE pin.
FE signa! output pin.
Pin for connecting FE signal gain setting resistance to TE pin.
GND for analog signal.
Single end output of CV+ and CV- pin input signal.
Spindle amplifier input.
Connecting pin for gain setting resistance at the time of spindle 12cm mode.
Connecting pin for Spindle phase compensation constant together with SPD pin.
Spindle control signal output pin.
Connecting pin for sled phase compensation constant.
Sled control signal output pin.
Input pin for sled delivery signal from micro computer.
Input pin for sled delivery signal from micro computer.
Input pin for tracking jump signal from DSP.
Input pin for tracking jump signal from DSP.
Input pin for tracking gain control signal from DSP. Gain low in case of TGL="H".
Input pin for tracking off control signal from DSP. Off in case of TOFF="H".
Output pin of TES signal to DSP.
(HIGH FREQENCY LEVEL) is used to judge whether main beam is located above pit or above mirror
Sled servo off control input pin.
Input pin for CLV error signal from DSP.
Input pin for CLV error signal from DSP.
RF output pin.
Pin for setting RF gain and EFM signal 3T compensation constant together with RFSM pin.
(SLICE LEVEL CONTROL) is output pin for controlling data slice level by RF waveshape DSP.
Input pin for controlling data slice level by DSP.
GND pin of digital system.
For Focs Smoosing capacita output pin.
Tracking Balance control pin.
NO CONNECT.
Output pin for detecting disc defect.
Standard clock input pin. DSP4.23MHz is input.
Micro computer command clock input pin.
Micro computer command data input pin.
Micro computer command chip enable input pin.
(DEFECT RF) RF level detecting output.
Focs serch select pin.
VCC pin for servo system and digital system.
Connection pin for standard voltage capacitor.
Standard voltage output pin.
Pin for setting constant at the time of detecting disc defect.
Pin for connecting condensor for RF signal peak hold.
Pin for connecting condensor for RF signal bottom hold.
APC circuit output pin.
APC circuit input pin.
RF system VCC pin.
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