Trouble Shooting - Sanyo DC-DVD888 Service Manual

TROUBLE SHOOTING

(This is a basic trouble shooting.)
General flow
EU Version
DVD-1500/UK, XE
DVD-6000/XE
POWER SUPPLY.FSTANDBY mode
IC601 ACTIVE/P-CON.FLOW
+5V/+12/-30/FIL.FOFF
STANDBY LED LIGHT
OK
POWER KEY
PRESS
P-CON.FHIGH
+5V/+12/-30/FIL.FON
OPEN/CLOSE.ETRAY LED LIGHT
IC601 STANDBY DATA WAITE
STANDBY LED OFF
OK
RESET LOADER AND
CHIPS
OK
READ/WRITE DATA
IN EEPROM
START
COMMUNICATION
WITH VFD
FROM MPU STANBY DATA SEND
IC601 STANDBY DATA RCVD
IC601 POWER ON DATA SEND
OK
VFD
INDICATE
"READING"
OK
IIC BUS LINE confirm
IC601 VFD peripheral
-30V.EFILAMENT voltage confirm
Communication LINE confirm
AC-CORD PLUG IN
IC601 VDD/RESET/OSC confirm
NG
IC601:FPC16316-80 confirm
STANDBY LED peripheral
P-COn/+5V/+12/-30/FIL confirm
POWER KEY confirm
NG
LED peripheral circuit confirm
P-CON/+5V/+12/-30/FIL confirm
NG RESET (IC130) confirm
VDD/CLOCK confirm
IC116 peripheral
NG
Communication LINE confirm
REMCON NG. IC116/IC113,112
periphera l
REMCON OK. then IC601
peripheral
NG
confirm
Except EU Version
DVD-S1500/US2
DVD-1500A/SS,AU
DVD-DWM-360/US2
STANDBY LED
circuit confirm
POWER KEY
PRESS
STANDBY LED
OPEN/CLOSE.ETRAY
LED LIGHT
RESET LOADER AND
confirm
READ/WRITE DATA
IN EEPROM
START
COMMUNICATION
WITH VFD
INDICATE
"READING"
confirm
confirm
INITIALISE
MEG DECODER
(IC127)
DISPLAY
START CONTROL OF
LOADER
PICK INITIALISE
SPINDLE ROTATE
INITIALISE
ADAC(IC130)
VFD
INDICATE N DISC Y/N
"NO DISC"
- 34 -
NG
IC601 VDD/RESET/OSC confirm
IC601:UPD16311 confirm
LIGHT
STANDBY LED
OK
NG
POWER KEY confirm
STANDBY LED
OFF
OK
NG
LED peripheral
OK
RESET (IC130) confirm
NG
VDD/CLOCK confirm
CHIPS
IC116 peripheral
OK
VFD
IIC BUS LINE confirm
NG
IC601 VFD
peripheral
-30V.EFILAMENT voltage confirm
Communication LINE confirm
OK
NG
IC118-IC127 BUS-LINE confirm
LOGO IC127/116 peripheral
OK
NG LOADER confirm
Communication LINE confirm (FFC)
OK
Y PLAYBACK mode
peripheral circuit confirm
peripheral circuit confirm
circuit confirm
confirm
circuit confirm
confirm