Zenith DV140, Service Manual

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3-5
A
Flash Memory operates
properly?
Show LOGO?
Does Tray move inside when
it is not at closed position?
B
NO
NO
YES YES
YES
YES
YES
YES
YES
YES
YES
Check connection lines between
FLASH & MT1389D and the FLASH
access time whether is suitable or not.
NO
SDRAM works properly?
Check connection lines
between SDRAM & MT1389D
and the SDRAM is damaged.
NO
MT1389D VIDEO outputs
properly? Check the related circuit of
MT1389D.
NO
Have TV signal output?
Check AV cable connection
to TV set.
Normal TROUT &TRIN
signals?
Check the filtering and amp
circuit of TV signal.
NO
Check the load OPEN &
CLOSE switch
NO
Normal TRCLOSE &
TROPEN signal? Check the Tray control IO
pins on MT1389D & IP9008.
NO
Normal LOAD+ & LOAD-
signal?
Check the cable connection
between main PCBA and
loader.
Check the Tray control
amplifying circuit on Motor
driver.
NO