Speaker Part(Melody) - Samsung SGH-Z140 Service Manual

Flow Chart of Troubleshooting

7-4. Speaker Part(Melody)

Speaker does not work
Yes
U607 pin7,32 = 2.8V?
Yes
Check the Clock signal
at Pin 1 of U607
(13.5MHz)
Yes
U607 pin 4 ¡ Ö 2.8V ?
(When U302 operate)
Yes
U607 pin 15
¡ Ö Battery Volt ?
Yes
Is Speaker working ?
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used with out Samsung's authorization
No
Resolder or replace U500
No
Check the clock generation circuit
(related to U500 and U607)
No
No
Check the circuit related to
"SPOUT1/SPOUT2" signal
No
7-8
Resolder U301
Change the Speaker