Flow Chart of Troubleshooting
9-7. Earphone Part
Earphone does not work
Yes
No
R512, R517 ≥ 100mV? (When MP3 file is played)
Yes
No
U502 pin 16, 8 ≥ 100mV? (When MP3 file is played)
Yes
No
U502 pin 16, 8 ≥ 200mV? (When MP3 file is played)
| Yes |
|
Check the circuit | Not OK | |
from IFC600 pin 5, 6, 7 |
| |
| ||
to U502 |
| |
OK
No
IFC600 pin 5, 7 short?
Yes
No
Is Earphone working?
Yes
END
Check UCP300
Resolder U502, R512, R517
Resolder U502
Resolder L602, L603
Resolder IFC600
Replace the Earphone
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