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SHARP SMSX1H
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP SMSX1H Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 34 (click to view)
SM-SX1H

TROUBLESHOOTING
• Power is not supplied. Does AC100V stand between Pins 1 and 2 of the power filter PWB connector CNP502? Yes Is any normal voltage is output from the power PWB B1503/CNS503? Yes No • Check the output voltage (OYT terminal) of UNT501 and UNT502. • Check the parts (L504 to L511, F502, FS503 and R503 to R506) on the power PWB. • Check the 1-bit amplification unit. (Try to disconnect CNWAM4 and CNWAM3.) (LED does not come on and it does not sound.) • Check the fuse F501. • Check the parts on the power filter PWB. • Check the wiring of the inlets SOC501 and CNS501.

No

Is 5V supplied to Pin 13 of the microcomputer IC907? Yes Is any oscillating waveform found at Pins 14 (OSC2) and 15 (OSC1)? No

• Check IC306 output. • Check R391.

No

• Check X900. • Check IC907.

• It neither sound at the analog nor digital input. Are the speaker relays RLY201 and RLY202 switched? Yes Are they properly wired to the 1-bit amplifying unit? (CNWAM1, CNWAM2, CNWAM3, CNWAM4)

(when power is supplied and LED is lit.) • Check whether 12V is supplied to RLY201 and RLY202 or not. (Check the surroundings of Q201, Q202, R201 to R202.) • Check whether Q203 and Q204 are on or not. • Check the line Q203 and Q204 from Pin 41 of the microcomputer IC907.

No

Is voltage properly supplied to 1-bit amplifier? (CNP306)

No

• Check whether the proper voltage is output from the AC input filter CNP502 or not. • Check whether RLY303 is activated or not. • Check whether Q303 is on or not. • Check the line Q303 from Pin 42 of the microcomputer IC907. • Check -22V (around Q115 and Q114). • Check 5V (around Q105 and Q106). • Check reset 5V. (Connection from Pin 21 of the microcomputer IC904.) • Check CNS601A/B and main volume, VOL601. • Check the IC107 output voltage which is supplied to drive the relay. • Check the relays RLY601 and RLY602 and drive circuit.

Yes

Is voltage properly supplied to 1-bit amplifier? (CNP305) No Yes

Is any signal output from the connectors CNP303 and CNP304 for 1-bit amplifier? Yes

No

Check the inside of the 1-bit amplifying unit.

– 34 –

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SMSX1H SHARP
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