Samsung SGH-Z510 Service Manual page 7

SGH-Z510 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-2. Initial
Initial Failure
Check the
pin 9 of
U502 is "High"
YES
Check the Sleep X-
tal signal's at C519
YES
Check the clock
signal's at R513
YES
LCD Display OK ?
YES
Sound operation OK
END
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NO
NO
NO
NO
NO
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Check U502
Check the OSC500
Check the U502 and
TCX300
Check the HDC200 part
Check the UCD300 part
2-4