Sharp XL-3000 Service Manual download pdf (Page 43)

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XL-3000/3000C

• Sled motor operation failure.

Yes

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 seted?

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

Is sled feed voltage applied between both terminals of sled

motor?

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

C801 is faulty.

Check the CNW803/CNS803.

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.

Yes

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

during playback?

Normal.

IC802 is faulty.

• Track search failure

Does the sled motor run in FF/REW state when the SERVO

TEST MODE "STEP1" is set?

Is the following wave output to the pin 49 (TRO) of IC802

during track search in normal playback?

Is the following wave output to the pins 12 (TEO) of IC801

during track search in normal playback?

Yes

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

IC802 failure.

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

19 of IC804.

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

Optical pickup.

If OK. Optical pickup failure.

Yes

Is the above wave output to the pins 46 (TEI) and 47 (TEZI) of

IC802 during track serch in normal playback?

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

and 47 of IC802. If OK. IC801 failure.

Normal.

Yes

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 seted?

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

of IC804.

Is the following wave output to the pin 41 (RFZI) and 42

(RFRP) of IC802 during track search in normal playback?

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.

Yes

TRO

TEO

TEI

TEZI

FF REW

FMO

RFZI

RFRP

FF REW

SL ±

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Sharp XL-3000 Service Manual Page 43

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