Samsung RCD-750 - CD Player (CDP) Circuit Operations

5-2. CDP basic circut operation
(1) CDP block diagram
SSP DSP AUDIO
! D/A
RF AMP—J, ee SIGNAL PROCESS’ | CONVERTER | 5
SERVO CONTROL, | ;
Ve a Pll
| POWER AMP |
DISPLAY
SYSTEM CONTROL
u-COM
(2) OPTICAL PICK-UP UNIT
CD system use laser beam to detect the signals recorded onto the dics.
The pick-up detects the presence or absence of data pits on the disc surface, emitting laser beam capable of being
incorporated into the pick up and converting signals from the disc into electrical signals.
(3) RF AMPLIFIER
After the optical pick up detects the presence or absence of data pits on the disc surface the resulting signals refered to
as RF or Eye pattern are not apparent and quite similiar to the sine waveform.
The signal waveform varies depending on the length and width of each pit on a disc surface. The RF signals can hardly
be seen on screen. The eyepattern are first amplified by the RF amplifier, and then demodulated by using the EFM
code (Eight to Fourteen Modulation ; 8bits....... 14bits modulation)
EYE PATTERN
RCD-750 - 16-