Read Sharp SD-CX1 (serv.man10) Service Manual online
SD-CX1H
– 78 –
Yes
No
Check the parts around IC3. If OK, IC3 is defective.
Check the parts around IC4. If OK, IC4 is defective.
Yes
• No sound is heard.
Is digital signal outputted from the pin 8 (digital OUT) of IC4 ?
No
Check the CD/MD connection sections.
Is the digital signal sent to the MD PWB and pin 13 of
CN1501 ?
CN1501 ?
Yes
Is the digital signal outputted from the pin 4 (digital OUT) of
IC3 ?
IC3 ?
No
OK
Yes
No
Check the parts around IC3. If OK, IC3 is defective.
Check the parts around IC4. If OK, IC4 is defective.
Yes
• No sound is heard during double speed EDIT.
(The recording is impossible.)
Is the digital signal outputted from pin 3, 6 and 11 (AOUT) of
IC4 ?
IC4 ?
No
Check the CD/MD connection sections.
Is the digital signal sent to pins 25, 26 and 27 of CN1501 on
the MD PWB ?
the MD PWB ?
Yes
Is the digital signal outputted from pins 1, 2 and 3 (AOUT) of
IC3 ?
No
OK
Yes
No
Check the connection of parts around IC3. If OK, IC3 is
defective.
defective.
Check the connection between pin 20 of IC1 and pin 40 of
IC3. If OK, C1 is defective.
IC3. If OK, C1 is defective.
Yes
• The sled motor does not run.
Is the slide feed signal outputted between pins 25 and 26 of
IC1 ?
IC1 ?
No
Check the PWB pattern.
Is the slide feed voltage applied to both edges of the sled
motor ?
motor ?
Yes
Is the slide feed signal outputted to pin 40 of IC3 by pressing
the / button in the test mode ?
the / button in the test mode ?
No
Check the slide motor. If the sled motor does not run when the DC2.0V is applied to its terminal, it is defective.
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