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SHARP VC-H998T
Service Manual


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

Description of SHARP VC-H998T 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.

The manual is available in languages: English

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Text excerpt from page 41 (click to view)
NO.10 FLOW CHART NO.11
The cassette tape fails to eject. No power is turned on.

Does the capstan motor start when NO Check IC701. the EJECT button is pressed? See FLOW CHART NO.12. pin(4) of IC701 change from "L" to "H" level?
YES NO Does the take-up turn when disk reel drive unit. Does base of Q951 change from NO Check IC701 and all the way up thru

NO Does power control(H) signal at

YES

the capstan motor is running? about 5.0V 4.5V? to Q951. Check take-up reel sensor and all the Is 5V sent out the collector of NO Are pulses applied at pin(2) of IC701 Check Q951 and the AT 5V line. Q951? when the take-up reel disk is turning?
YES

YES

way up thru to IC701.

YES

NO

Check pin(90) of IC701. soldering. pin(12) of IC706 when a reel pules

Check peripheral circuits for poor Is a "H"(about 1.7V) level applied at

has been inputted?

YES

Is the voltage about 10V sent out of NO Check IC706. pin(15) of IC706?

YES FLOW CHART NO.12 NO Is specified voltage applied at Check between IC706 and all the

41
NO

motor terminal? way up thru to the loading motor.

The capstan motor fails to run.

YES

Does motor run? Replace loading motor. Is the voltage more than about 2.6V NO

DC given out pin(29) of IC701.
YES

Check IC701.

YES

Replace cassette cam, gear, etc. NO Is the supply voltage of 5V feed to pin(8) of AC connector?
YES NO YES

Check PC 5V line.

Check between the AC connector Is the voltage more than 2.6V DC and all the way up thru to pin(29) sent in pin(4) of AC connector? of IC701. Check between the pin(92) of IC701 NO Is the voltage at pin(3) of AC and all the way up thru to pin(3) of connector 1.6~2.7V? AC connector.
YES NO Check AT 12V line and motor voltage

selector circuit. (Q955~Q956). Is the supply voltage of 12V feed to pin(5) of AC connector? YES Replace capstan motor.

VC-A392T/A395T/A595T VC-H992T/H998T

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