SAMSUNG LC87F5NC8A Schematics

7. Schematic Diagram

USB

JACK

AUX

JACK

ESS_P3

MPEG

LC87F5NC8A

MICOM

VFD

DISPLAY

H/P

JACK

MIC

JACK

TUNER

JACK

PT6324

VFD

DRIVER

MICOM- UPDATE MPEG UPDATA

TAPE ASS'Y

SIGNAL

CtrL+SIGNAL

SIGNAL

Ctrl

VFD_CB VFD_CLK VFD_DATA

PS 9830

PWM

R SPK

H/P SIGNAL

M_STB M_ACK M_RXD M-RESET

PRE-AMP

4560

AUDIO

AMP

IRS2053

PRE-AMP

4560

PRE-AMP

4560

Y,Pb,Pr

REC SIGNAL

POWER IRF4019

X 2

POWER IRF4019

X 2

L SPK

12.288 MHz

S M P S

AMP POWER

MAIN POWER

+5V

PVDD

+PVDD

5. 6V(MICOM)

5.6V(p_sense)

12V (MOTOR)

+VFD

12V (TAPE)

VFD

VFD VP

P ON(5V)

74LCX04

PWM_FL_L+ PWM_FL_L-

PWM_FR_R-

PWM_FR_R+

TSD0 TSD1 TSD2

SPK FL

SPK_FR

SIGNAL

Ctrl

TBCK TWS

PS_SI PS_CS

PWM_DATA PWM_CLK

5 Tray

MECHA

AM 5766

DRAM IC

8082

DTF

8082

DTF

OPEN CLOSE

RL+ RL-

TM+(OP)

TM- (CL)

CM- (DW)

CM+(UP)

Ctrl

DATA

CtrL+SIGNAL

Ctrl

Motor Ctrl

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7-1 Overall Block Diagram

Schematic Diagram

 The Main Micom IC is LC87F5NC8A. It’s same as last year. MPEG chip is ES8391SCD. It’s upgrade version of

ES8390SCD.

 The Main Micom control every IC in this PCB.

ideo signal is come from DVD mecha and go to the MPEG IC. Then MPEG IC decode this signal to real video signal.

 V

 Audio signal is come from DVD mecha,

TUNER, AUX, MIC. Then MPEG IC decode to digital I2S signal.

This signal goto the PS9830(PWM modulator) to convert PWM signal. PWM signal amplified at IR AMP stage and then

Low Pass Filtered. This signal is real audio signal.

Samsung Electronics 7-1

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Schematic Diagram

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7-2 FRONT

POWER

AUDIO

7-2 Samsung Electronics

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7-3 MAIN_MICOM

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POWER

AUDIO

Schematic Diagram

TP1

Samsung Electronics 7-3

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