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Home >> ROADSTAR >> LCD8412K Service Manual
 
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ROADSTAR LCD8412K
Service Manual


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

Description of ROADSTAR LCD8412K 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 7 (click to view)
NO SIGNAL.
Test whether +40V is normal or not.

NO

Check 40V loop.

YES

Test whether wave band switch voltage is available with CPU �,1�,41�,42 pin. Test pin VT output voltage is normal or not.

NO YES

Change CPU.

Check whether AGC voltage for +5V power supply of TV tuner is normal or not. Check the TV turner VT voltage is normal or not. Check 5V power supply and AGC circuit, and also check the circuit of VT voltage.

NO YES

Check whether circuit of pre-central amplifier and periphery of LA76810�,50 pin is normal or not.

NO YES
Check periphery of �,50pin for pre-central amplifier.

Change the TV tuner.

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