Marantz DV4000 Service Manual download pdf (Page 11)

9

8. SERVICE MODE

8-1.

8-1-1. MAIN (IC600:MB90574)

NAIN

IC

AV DEM/ECC VIDEO

CD-DSP AUDIO-DAC PRE-AMP READ-

CHANNEL

SERVO

DVD

OSD

DISC

OPE

MAIN RESET

8-1 OPERATION

8-1-1. Main Microprocessor (IC600 : MB90574)

Functions which operated by main microprocessor

are follows.

Control of following IC's.

AV decoder, DEM/ECC, VIDEO encoder, CD-

DSP, AUDIO-DAC, PRE-AMP, READ-CHANNEL,

SERVO

Mechanism control

DVD rate control

OSD control

DISC detect, Focus/Tracking alignment

Data transmission between OPE microprocessor

Process from POWER ON (RESET RELEASE) till

PLAY BACK are described in the chart below.

Release REST

Initial read EEPROM

EEPROM

Release RESET (IC's)

IC RESET

VIDEO Encoder initial setup

VIDEO

(PAL or NTSC)

Release RESET (AV Decoder)

AV RESET

Boot up AV Decoder

AV BOOT UP

Servo IC initialize

RESET

IC

DEM/ECC initialize

DEM/ECC

Digital out of the AV decoder

initial set up. (48Khz liner PCM)

AV

48KHz PCM

)

Show the start up frame

DISC detect

DISC

CD/VCD DVD

TOC reading

TOC

Control data

reading

PLAY BACK /

Mechanism initialize

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