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JBL SG2020
Service Manual


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

Description of JBL SG2020 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 13 (click to view)
C
YES

Does FE1 signal appear? IC 801

59

pin NO Defective IC 801. Open pick diode

YES

Does FZC signal (focus zero cross signal) appear at pin 31 of IC 801, ISTAT (SENSE) terminal?
FER ISTAT(SENSE)

NO

Defective IC 801.

(Focus servo turns ON by FZC signal of FOK mod.)

YES

Does SMON signal appear at pin 73 of IC 802? Does SMPO signal appear at pin 75 of IC 802? YES

NO

Defective Pattern between IC 801 and IC 802.

Is drive voltage applied to disk motor? NO Defective IC 801, 803 and/or peripheral circuit.

Start mode

YES

Defective disk motor and/or insulation.

-13-

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