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MPEG P. W. BOARD OPERATIONAL
(General operation
diagram)
Numbers@
-~
encircled
and shadowed
represent
relevant
waveforms.
d
A C POWER
ON
I
Flickering
of screen
_
Standby
LED illuminates.
t
A
Power on
L
/
Standby
LED goes out.
Flickering
of screen
OPEN
image appears
on monitor.
- Blue indicator illuminates.
—
Disk rotates.
VFD : READING"
indicated.
PLAY LED illuminates.
—
Master
RESET
: IC130
+5V Detection
[0
X8001
Oscillator start
@
ICI 16 MPU-IC1
18, 119 communication
start
@
ICI 17 DRAM
access 10
IC015
each RESET
signal (ICI 16 ,110,142,143,1442,5
pin)
RESET_ADAC
-> ICI 15 reset
RESET_VENC
-> ICO02 reset . .. ... .. .. Flickering
of screen
RESET_DVD
-> IC127
reset . ... .. .. .. . Flickering
of screen
RESET
DRIVE
-> Loader reset
10
IIC-BUS
communication
5
IC601
User interface
CTL . .. ... .. Standby
LED Lighting
@
L
1
IIC-BUS
communication
check]
Open screen
DATA:
IC118,119
Control : IC116
MPEG
: IC127
Image Generation
V-ENC
: ICO02
Image signal
IC601
user interface
CTL ... .. .. . Blue LED Lighting
lLoader CTL .. ... .. Disk turn
I
I
IC601
user interface
CTL .. .. .. .. VFE indicate "READING"
—
PLAY LED Liqhtinq
I PLAY BACKI
Check each signal and voltage referring to relevant
block diagrams.
-48-
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Table of Contents
Troubleshooting
