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TROUBLE SHOOTING
(This is a basic waveform check.)
General flow
FOR EU
DVD-7201, 9201, 9501
AC-CORD PLUG
/UK, XE
-30v, 5V POWER
ONLY
IC601 RESET
X6000 CLOCK
IC601 ACTIVE
after 1sec
POWER SUPPLY;STANDBY mode
NG
IC601,VDD/RESET/OSC CONFIRM
IC601 ACTIVE/ P-CON ; LOW
IC601 COMMUNICATION CONFIRM
+5V/+12/-30/FIL ; OFF
STANDBY LED PERIPHERAL CIRCUIT CONFIRM
P-CON/+5V CONFIRM
START system check (DETAIL 1)
STANDBY LED
LIGHT
POWER KEY
PRESS
P-CON ; HIGH
+5V/+12/FIL ; ON
NG
POWER KEY CONFIRM
IC601 STANDBY DATA WAITE
LED PERIPHERAL CIRCUIT CONFIRM
STANDBY LED OFF
P-CON/+5V/+12/FIL CONFIRM
FROM MPUSTANBY DATA SEND
NG
COMMUNICATION LINE CONFIRM
IC601 STADBY DATA RCVD
REMOCON NG -> IC801 PERIPHERAL CONFIRM
IC601 POWER ON DATA SEND
REMOCON OK -> IC601 PERIPHERAL CONFIRM
INITIALIZE
ADAC(IC817)
EXCEPT EU
DVD-7201, 9201, 9501
/US, CA, SS, AU
DVD-DWM-370/US
ALL POWER ACTIVE
IC812
SYSTEM RESET
IC801 CLOCK
IC801/FLASH
DRAM ACCESS
IC601
COMMNICATION
INITIALIZE
ADAC(IC131)
after 1sec
STANDBY LED
LIGHT
POWER KEY
PRESS
STANDBY LED
OFF
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NG
IC601,VDD/OSC CONFIRM
IC601 COMMUNICATION CONFIRM
STANDBY LED PERIPHERAL CIRCUIT CONFIRM
START system check (DETAIL 1)
NG
POWER KEY CONFIRM
STANDBY LED PERIPHERAL CIRCUIT CONFIRM
NG
RESET (IC812) CONFIRM
RESET LOADER AND
CHIPS
VDD/CLOCK CONFIRM
IC801 PERIPHERAL CONFIRM
READ/WRITE DATA
IN EEPROM
(IC815)
START
COMUNICATION
WITH VFD
VFD
NG
IIC BUS LINE CONFIRM
INDICATE
IC601 VFD PERIPHERAL CONFIRM
"READING"
-30V FILAMENT VOLTAGE CONFIRM
COMMUNICATION LINE CONFIRM
INITIALIZE
MPEG DECORDER
(IC801)
NG
IC801, 802, 803 BUS-LINE CONFIRM
DISPLAY
OPENNING
IC804, 805 BUS-LINE CONFIRM
START CONTROL OF
LOADER
NG
LOADER CONFIRM
PICK INITIALIZE
SPINDLE ROTATE
COMMUNICATION LINE CONFIRM(FFC)
VFD
DISC Y/N
PLAYBACK mode
INDICATE
N
Y
"NO DISC"
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