NAD T515C Service Manual page 16

A
RESET or Power On.
Show LOGO?
YES
Does Tray move inside when
it is not at closed position?
YES
B
NO
Flash Memory operates
properly?
SDRAM works properly?
ZR36882 VIDEO outputs
properly?
Have TV signal output?
Check AV cable connection
to TV set.
NO
Normal OUTSW & INSW
signals?
Normal OPEN & CLOSE
signal?
Normal LOAD+ & LOAD
signal?
Check the cable connection
between main PCBA and
loader.
3-5
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check connection lines between
FLASH & ZR336888 and the FLASH
access time whether is suitable or not.
Check connection lines
between SDRAM & ZR36888
and the SDRAM is damaged.
Check the related circuit of
ZR36888
Check the filtering and amp
circuit of TV signal.
Check the load OPEN &
CLOSE switch
Check the Tray control IO
pins on ZR36888 &
AM5869S
Check the Tray control
amplifying circuit on Motor
driver.