BBK DK1410SI - Page 50

9. Troubleshooting process for no sound of headphone is shown as the following figure :3.3.2.9
No sound of headphone
Insert headphone
Change headphone holder
Check flat cable of XS106,
XP106
Change headphone holder
Check flat cable of
XS106, XP106
N
Y
Y
Y
N
N
Whether pin 7 HDET
of Xs201 is low level
Whether pin 6 HDET
of XS106 is low level
Use oscillograph
to test whether pin 5, 6
of XS201 have H-L,
H-R signal
Whether pin 1,
2 of XS106 have
H-R, H-L signal
Check power supply circuit
Change N12 (TAS5508)
Change N11
Change N10
Y
Y
Whether power
supply of N10, N11
(4580) is normal
Use oscillograph
to test whether PWMHPR,
PWMHMR signal
has output
Y
Whether pin 1,
7 of N10 (4580)
has output
N
Y
N
N
N
Figure Troubleshooting flow chart for no sound of headphone 3.3.2.9
- 46 -