Samsung YP-Q1 Service Manual page 20

4-1-3 FM Tuner does not work.
Symptom No FM radio reception
1 Check C724 FM_VDD on 3.3V
Major Checklist
2 Check FM_Clock of 32.768KHz from RTC clock output
Activate the FM radio.
Are the earphones plugged in?
Yes
Is Si4702 Chip set to
ENABLE? (IC700 5PIN)
Yes
2
Is 32.768 KHz CLOCK being
inputted normally?
Yes
Completion
Samsung Electronics
No
Connect an earphone & check again
No
No
Is RTC CLOCK functioning normally?
 Refer to wave pattern
image of Fig. 4-3.
1
Check the power terminal.
C724: 3.3V
 Refer to wave pattern
image of Fig. 4-3.
(needs thorough examination).
Troubleshooting
No
Replace the BOARD
4-7