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SHARP IMDR420H
Service Manual


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

Description of SHARP IMDR420H 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)
IM-DR400E/410H/E/420H
� Audiowiedergabe-Schaltkreis
Obwohl die Anzeige der Wiedergabezeit aktiv ist, wird im normalen Betrieb kein Ton wiedergegeben. Wird ein PWM-Signal an den Pins 68, 69, 72, 73 am IC201 ausgegeben? Nein Prüfen Sie die Peripherie von IC201.

Ja Wird eine Audio-Wellenform an den Pins 1,2,3,4 am J703A ausgegeben? Ja Prüfen Sie den Kopfhöreranschluss und das Umfeld der Kopfhörer. Prüfen Sie, ob die Leiterbahnen des Audiosignals eine defekte Lötstelle zwischen J703A aufweisen.

Nein

� Der Spindelmotor läuft nicht. Bewegt sich der Kopf?

Erscheint im TESTBETRIEB an den Pins 26 und 27 am IC201 eine Wellenform nach Beendigung von AUTO2 und während dieses Status? Ja Erscheint an den Pins 60, 61, 62, 63 am IC601 eine Wellenform. Ja

Nein

Prüfen Sie die Peripherie von IC201.

Nein

Prüfen Sie die Lötstellen an IC601, CN601 und an der flexiblen Platine usw.

Wechseln Sie den Spindelmotor aus.

� Die Stromversorgung wird nicht eingeschaltet,
wenn die û / ûâ-Taste gedrückt wird.

Ja Nein Ja

� Falls �HOLD� angezeigt wird, halten Sie bitte die STOPTaste am Hauptgerät gedrückt und brechen Sie den HOLD-Betrieb ab.

Wird die Stromversorgung eingeschaltet, wenn die ûâ -Taste auf der Fernbedienung gedrückt wird?

�

Normal

Nein Ist der Betrieb normal, wenn die Taste am Hauptgerät gedrückt wird? Nein �berprüfen Sie die Fernbedienung und die KopfhörerAnschlüsse am Hauptgerät.

Ja

Oszillieren die Pins 15 und 17 von IC401? Ja In Ordnung.

Nein

Tauschen Sie XL401 aus.

� 34 �

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