• Track search failure

Does the sled motor run in FF/REW state when the SERVO TEST MODE "STEP1" is set?

Yes

Is the following wave output to the pin 49 (TRO) of IC802 during track search in normal playback?

Yes

TRO

Is the following wave output to the pins 12 (TEO) of IC801 during track search in normal playback?

Yes

TEO

TEI

TEZI

Is the above wave output to the pins 46 (TEI) and 47 (TEZI) of IC802 during track search in normal playback?

Yes

Is the following wave output to the pin 41 (RFZI) and 42 (RFRP) of IC802 during track search in normal playback?

Yes RFRP

RFZI

Normal.

• Sled motor operation failure.

Is following sled feed signal output the pin 53 (FMO) of IC802

when FF /REW key is pressed after the CD TEST MODE "STEP 1" is set?

Yes

 

FF

REW

 

FMO

 

 

 

 

 

 

Is following sled feed signal output the pins 3 and 4 of IC804

when FF /REW key is pressed after the CD TEST MODE "STEP 1" is set?

Yes

FF

REW

 

 

SL ±

Is sled feed signal output the pins 1 and 2 of IC804?

Yes

Is sled feed voltage applied between both terminals of sled motor?

Yes

Check the CD mechanism (periphery of sled motor).

If the sled motor does not run when DC2.0V is applied to both terminals of sled motor, the sled motor is faulty.

• Sled servo failure.

Is following sled signal output the pin 53 (FMO) of IC802 during playback?

Yes

FMO

Normal.

XL-3000V

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

IC802 failure.

No

 

Check the PWB pattern between pin 49 (TRO) of IC802 and pin

 

No

 

19 of IC804.

 

 

 

 

Check the PWB pattern between pins 17 and 18 of IC804 and

 

 

 

 

Optical pickup.

 

 

If OK. Optical pickup failure.

 

 

 

 

 

 

 

 

Check the PWB pattern between pin 12 (TEO) of IC801 and pins 46

 

No

 

and 47 of IC802. If OK. IC801 failure.

 

 

 

 

No

Check the PWB pattern between pin 17 (RFO) and 18 (RFIS), 19

(RFRP) of IC801 and pins 41 and 42 of IC802. If OK. IC801 failure.

 

C802 is faulty.

No

No

Check the PWB pattern between pin 53 of IC802 and pins 3 and 4

of IC804.

 

Check the peripheral parts of IC804. If OK, IC804 is faulty.

No

Check the CNW803/CNS803.

No

IC802 is faulty.

No

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Sharp XL-3000V service manual Track search failure, Sled motor operation failure, Sled servo failure