Zenith XBV613 Service Manual - Page 53

Zenith XBV613 - DVD/VCR Combination Manual

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A RESET or Power On. Show LOGO? YES NO Flash Memory operates properly? NO Check connection lines between FLASH & ZR336888 and the FLASH access time whether is suitable or not. YES SDRAM works properly? NO Check connection lines between SDRAM & ZR36882 and the SDRAM is damaged. YES ZR36882 VIDEO outputs NO properly? YES Check the related circuit of ZR36882 Have TV signal output? NO YES Check the filtering and amp circuit of TV signal. Check AV cable connection to TV set. Does Tray move inside when NO it is not at closed position? YES B Normal OUTSW & INSW NO signals? YES Normal OPEN & CLOSE NO signal? YES Normal LOAD+ & LOAD - NO signal? YES Check the cable connection between main PCBA and loader. 3-60 Check the load OPEN & CLOSE switch Check the Tray control IO pins on ZR36882 & AM5869S Check the Tray control amplifying circuit on Motor driver.

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3-60
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
A
RESET or Power On.
Flash Memory operates
properly?
Show LOGO?
Does Tray move inside when
it is not at closed position?
B
Check connection lines between
FLASH & ZR336888 and the FLASH
access time whether is suitable or not.
SDRAM works properly?
Check connection lines
between SDRAM & ZR36882
and the SDRAM is damaged.
ZR36882 VIDEO outputs
properly?
Check the related circuit of
ZR36882
Have TV signal output?
Check AV cable connection
to TV set.
Normal OUTSW & INSW
signals?
Check the filtering and amp
circuit of TV signal.
Check the load OPEN &
CLOSE switch
Normal OPEN & CLOSE
signal?
Check the Tray control IO
pins on ZR36882 &
AM5869S
Normal LOAD+ & LOAD -
signal?
Check the cable connection
between main PCBA and
loader.
Check the Tray control
amplifying circuit on Motor
driver.