Sony RDR-VX511 Service Manual page 115

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Line1 CVBS Video Input Error
Pin4 in IC801
has nomal level?
(jack PCB)
Yes
Pin21 in IC801
has nomal level?
Yes
Pin12 in IC1001 digital main PCB
has nomal level?
Yes
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Pin45 and pin 54~62 in
IC1001 of main PCB has clock and
digital video signal
nomal level?
Yes
Check feed back
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No
Check the connection between
pin4 in IC801 and L1 pin-jack
No
Check pin 62, 55 in IC801 of input power
No
Check the connection between pin12
in IC1001 of digital main PCB
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No
Check IC1001 peripheral circuit
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