Sharp SD-AT100H Service Manual page 101

1-bit digital home cinema with dvd
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Both picture and sound do not operate normally. (1)
Place the disc on the tray and close it.
When chucked, disc starts rotating ?
Is the level of RF signal which is output from
pin 28 of IC3301, normal ?
Replace the DVD servo PWB unit.
Check the DVD servo PWB unit.
Picture do not operate normally.
Set the disc on the disc tray.
Are the video signals shown above input into
the pins of CP5001?
CP5001 7pin Y/CR
CP5001 9pin C/CB
CP5001 5pin VOUT
Check or replace DSP PWB
Sound is not given properly from speaker.
Set disc to DISC tray and play.
Digital sound signal inputted to pin 34 of
IC504?
Check or replace DSP PWB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Refer to "Disc does not turn."
No
Check for contamination of objective lens of
optical pickup.
No
Replace the optical pickup mechanism Unit.
Check the line between the pins of DVD servo unit
No
IC3601 and the pins of CP5001.
IC3601 105pin → CP5001 7pin Y/CR
IC3601 106pin → CP5001 9pin C/CB
IC3601 102pin → CP5001 5pin VOUT
Check each line between pin 133 of IC3601 and
No
input pin 34 of IC504.
Check or replace IC3601.
– 101 –
SD-AT100H
No
Yes

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