DV-4070-B/4900/DVF-R7030-B/R9030
7
CIRCUIT DESCRIPTION
Step function
Remarks
1
POWER-ON
2
CD-TRAY CLOSE.
3
DISC-POSITION-SW ON
Display shows blinking "INITI"
4
ROTARY-SW ON
5
TRAVERSE-UNIT
6
RAM & BACKUP INITIALIZE
Display shows "INITI_OK" if no trouble. "INITI_NG if any trouble.
INITIALIZATION
Turn power-on with pressing the STOP key. You can separate
from initialization mode if pull out the ac power cord.
SUB MICROPROCESSOR:MN101C28C(X25,IC100)
Port No.
Port Name
I/O
Description
1
VREF-
O
Negative reference voltage for AD converter.
2-4
KEY0-2
I
Key input for AD
5,6
KEY3,4
O
No use
7
KISYU
I
Model selector
8.9
KID0,1
I
Destination selector
10
VREF+
O
Positive reference voltage for AD converter.
11
Vdd
O
+5V
12
OSC2
I
Clock input,10MHz
CPPM,WM IC PERIPHERY DIAGRAM
X35,IC300
X35,IC700
X35,IC400
X25, IC5/6
OPTICAL
DEVICE
CONTROL
CONTENTS
PROTECTION
for PRERECORD
MEDIA
AV DECODER
AUDIO
DAC
ADDRESS
DECODER
WATER
MARK
ADDRESS
DECODER
SDRAM
X35,IC401/2
BUS
OR
X35,IC500
MAIN
MICROPROCESSOR
8
A19
16
16
CS1
ODCWIAT
CS2
A16
8
