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Old 29-01-2015, 13:39   #1
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JRC Jnav500 Service manual
Hy all, i have an GPS Navigator JRC JNav500 and its starts but the display shows only vertical dots, that's moves chaotic. I open it and inside i sow nothing broken, i measured the voltage of the input 12V(Pin 1 and ground at voltage regulator LM7805) .

Have someone an service manual or electrical diagram?

I mention that a hear a periodical beep, i have no antenna connected.

Best regards!
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