Sharp SD-AT100H, Service Manual, Page: 101 / 132

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