19.06.2014 Views

service information for eeprom ic setting - Jordans Manuals

service information for eeprom ic setting - Jordans Manuals

service information for eeprom ic setting - Jordans Manuals

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

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 />

4-2

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!