Sharp XL-3000V Focus servo sawtooth wave failure, Spindle motor clv servo failure, Dmo

• Focus servo sawtooth wave failure.

Is sawtooth wave output to the pin 48 (FOO) of IC802 ?

Yes

1.5~2.5sec

No

XL-3000V

IC802 is faulty.

Is +6.2V applied to the pins 21 and 22 (VCC) of IC804 ?

Yes

Is sawtooth wave obtained between pins 26 and 27 of IC804 ?

Yes

1.5~2.5sec

Is sawtooth wave obtained between pins 13 and 16 of CNP802/CNW3 ? (as shown above)

Yes

CNP802/CNW3 connection failure or optical pickup failure.

Check the PWB pattern between emitter of Q607 and IC804.

No
	Is +5V applied to the pin 7			Check the PWB pattern
No
	(MUTE) of IC804 ?		No	between pin 7 of IC804
		Yes		and pin 60 (CD STB) of
				IC701.

Check the PWB pattern between pin 48 (FOO) of IC802 and pins 24 and 25 of IC804. If OK. IC804 is faulty.

Check the PWB pattern between CNP802/CNW3 and IC804.

No

• Spindle motor clv servo failure.

Is following wave output to the pin 55 (DMO) of IC802 when the CD TEST MODE "STEP 3" is changed to " STEP 4" ?

Yes

DMO

Is above wave obtained between pins 11 and 12 of IC804 ?

Yes

Is above wave obtained between pins 9 and 12 of CNP802/ CNW3 ?

Yes

CNP802/CNW3 connection failure or optical pickup failure.

No	Check the procedure in "HF ERROR".
	If OK. IC802 is faulty.

No	Check the PWB pattern between pin 55 (DMO) of IC802 and pins
	9 and 10 of IC804. If OK. IC804 is faulty.

Check the PWB pattern between CNP802/CNW3 and IC804.

No

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