Sony AVD-K150B Service Manual page 34

AVD-K150B/K150E/K150G/K150N/K150R
A
RESET or Power On.
Show LOGO?
Does
Tray move inside
when it is not at
closed position?
B
34
NO
Memory operates
properly?
YES
SDRAM
works properly?
MT1379
VIDEO outputs
properly?
TV signal output?
Check AV cable
connection to TV set .
NO
TROUT & TRIN
signals?
YES
TRCLOSE &
TROPEN signal?
LOAD+ & LOAD-
signal ?
Check the cable connection between
main PCBA and loader. (MECHA)
Flash
NO
YES
NO
YES
NO
YES
Have
NO
YES
Normal
NO
YES
Normal
NO
YES
Normal
NO
YES
Check connection lines between FLASH
& MT1379 and the FLASH access time
whether is sui table or not.
Check connection lines between
SDRAM(IC502,IC503) & MT1379 and the
SDRAM is damaged.
Check the related circuit of MT1379.
(IC501 PIN 161,166, 168 check)
Check the filtering and amp circuit of
TV signal .(IC507)
Check the load OPEN &
CLOSE switch
Check the Tray control IO pins
on MT1376 & MT1379.
Check the Tray control amplifying
circuit on Motor driver.(IC402)