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NAD L56
Service Manual


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

Description of NAD L56 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 17 (click to view)
B.
No disc

.Power on

Check loading Part.

Does tray open or close?

NO

Push Pick-up to inner track to the end by hand.

YES Does PMD03 Pin 7 change high to low? YES Pressing the open/close key repeatedly, check the voltage of IC2M1 Pins 13, 14 change 0V to 5V YES Does the voltage change at PMD04 Pins 1, 2 more than 2V on the basis of 3.8V? YES

NO

DECK assembly is defective. (Limit sw)

NO check µ-COM Part.

NO Replace IC2M1.

DECK assembly is defective. Fig.1. SLED Driver waveform

Does the pick-up slide inner or outer track? YES

NO

Check SLED Driver output. IC201 Pin 88 IC2M1 Pins 28, 29.

IC201 Pin 88 no output : IC201 is defective IC2M1 Pin 18 no output : IC2M1 is defective

Fig.2. Focus Driver waveform NO Check Focus Driver output. (IC201 Pin 83, IC2M1 Pins 37, 38) IC201 Pin 83 no output : IC201 is defective IC2M1 Pins 1, 2 no output : IC2M1 is defective

Does the pick-up lens move up and down? YES Slide the pick-up to inner track.

END

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L56 NAD
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