Lcd - Samsung SGH-Z370 Service Manual

Flow Chart of Troubleshooting and Circuit Diagrams

3-1-9. LCD

LCD does not work LCD does not work
Check the HDC300 Check the HDC300
(LCD Connector) (LCD Connector)
YES YES
Check HDC300 Check HDC300
(BackLight enable) (BackLight enable)
PIN #20 = 2.6V PIN #20 = 2.6V
YES YES
Check the J3 of LCD circuit Check the J3 of LCD circuit
YES YES
Chech HDC300 Chech HDC300
PIN #19 = 3.0V PIN #19 = 3.0V
YES YES
Resoldering the J2 Resoldering the J2
Of LCD citcuit Of LCD citcuit
END END
NO NO
NO NO
NO NO
NO NO
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Connect the HDC300 Connect the HDC300
Check the UCP100 Check the UCP100
(backlight enable Path) (backlight enable Path)
Connect the J3 of LCD circuit Connect the J3 of LCD circuit
Check U407 Check U407
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