Read Sharp XL-60 (serv.man6) Service Manual online
XL-60H/70H
– 40 –
• Focus servo sawtooth wave failure.
Is +6.2V applied to the pins 1 and 30 (VCC) of IC804 ?
Is sawtooh wave output to the pin 48 (FOO) of IC802 ?
IC802 is faulty.
No
Yes
Yes
Is sawtooth wave obtained between pins 25 and 26 of IC804 ?
No
No
Check the PWB pattern
between pin 2 of IC804
and pin 58 (CD STB) of
IC701.
between pin 2 of IC804
and pin 58 (CD STB) of
IC701.
Is +5V applied to the pin 2
(MUTE) of IC804 ?
(MUTE) of IC804 ?
Check the PWB pattern between pin 48 (FOO) of IC802 and pins
27 and 28 of IC804. If OK. IC804 is faulty.
27 and 28 of IC804. If OK. IC804 is faulty.
Check the PWB pattern between pin 16 of CNS602 and IC804.
No
Is sawtooth wave obtained between pins 3 and 4 of BI801/
CNS801 ? (as shown above)
CNS801 ? (as shown above)
Yes
Check the PWB pattern between BI801/CNS801 and IC804.
No
BI801/CNS801 connection failure or optical pickup failure.
Yes
• Spindle motor clv servo failure.
Is above wave obtained between pins 5 and 6 of IC804 ?
Is following wave output to the pin 55 (DMO) of IC802 when
the CD TEST MODE "STEP 3" is changed to " STEP 4" ?
the CD TEST MODE "STEP 3" is changed to " STEP 4" ?
No
Yes
Check the procedure in "HF ERROR".
If OK. IC802 is faulty.
If OK. IC802 is faulty.
Check the PWB pattern between pin 55 (DMO) of IC802 and pins
5 and 6 of IC804. If OK. IC804 is faulty.
5 and 6 of IC804. If OK. IC804 is faulty.
No
Is above wave obtained between pins 5 and 6 of BI801/
CNS801 ?
CNS801 ?
Yes
Check the PWB pattern between BI801/CNS801 and IC804.
No
BI801/CNS801 connection failure or optical pickup failure.
Yes
DMO
Yes
1.5~2.5sec
1.5~2.5sec
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