Sharp HT-M700H Service Manual page 67

• The CD disc is not recognised. (When the laser beam does not
go on)
Is the voltage of 3.4 V being applied to the emitter of QQ2 ?
Is the voltage of 2.3 V being applied to the pin 15 of JJ1 ?
Check connection of optical pickup cable.
If it is normal, replace the optical pickup mechanism unit.
Both picture and sound do not operate normally. (1)
Place the disc on the tray and close it.
Yes
When checked, disc starts rotating?
Yes
Is the level of RF signal which is output from
pin 57 of U9, normally ?
Yes
Replace the DVD servo PWB unit.
Yes
check the DVD servo PWB unit.
Yes
Yes
No
No
No
No Check the A_5 V line.
Refer to "Disc does not turn."
Check for contamination of objective lens of optical pickup.
Replace the optical pickup mechanism unit.
7 – 3
HT-M700H
No