service information for eeprom ic setting - Jordans Manuals
service information for eeprom ic setting - Jordans Manuals
service information for eeprom ic setting - Jordans Manuals
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ELECTRICAL TROUBLESHOOTING GUIDE<br />
Reset or Power Check.<br />
Check it after connecting the power cable<br />
only on interface cable <strong>for</strong> NO Reset or<br />
Power ON.<br />
Are the pin 44 of<br />
LPB271+5V, pin41 of LPB271+12V<br />
respectively after the power cable<br />
connecting?<br />
NO<br />
Check the power(5V/12V) short.<br />
Repair the SMPS Block<br />
YES<br />
Does the pin #1<br />
(Reset) of LIC271 change 0V to 3.3V<br />
at the power supply initial input<br />
mode?<br />
YES<br />
Are the LX201 oscillating?<br />
NO<br />
NO<br />
Check the LIC401(3.3V regulator IC).<br />
Check the LIC201, LIC121.<br />
Check the LX201(16.9MHz).<br />
Check the LIC201.<br />
YES<br />
<br />
Is the pin 5 of LIC401 3.3V?<br />
NO<br />
Check the LIC401.<br />
YES<br />
<br />
1.65V(VREF) : Check pin113 of LIC121?<br />
2.2V(HDVREF): Check pin78 of LIC121<br />
NO<br />
Check the LIC121.<br />
YES<br />
OK<br />
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