22
TSP-16
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Interface Trouble
No
Improper mounting of R21 and pattern
disconnection of the LINE_MUTE signal
No sound is input / output from all input / output terminal
Is MCK output from IC2000?
[Observation point
Y
]
Is the L_MUTE signal about -12V?
[Observation point
?
]
No
Yes
Yes
Failure in IC2000 and peripheral circuit
Failure in the MUTE circuit and peripheral
circuit
No
Failure in IC
8
00 and peripheral circuit
No
Failure in the common mode filter(L4100)
Failure in the U
S
BB connector(JA4100)
Failure in IC4100 and peripheral circuit
Yes
Yes
PC connection is not available (U
S
B-B)
Is the voltage of IC4100
power supply normal?
[
S
ee 10.
3
5 VOLTAGE
S
]
Is the +D, -D line normal?
[Observation point
:
]
No
Failure in IC4100 and peripheral circuit
Yes
Is the EIM bus
communication normal?
[Observation point
.
_
]
No
Failure in the crystal (X4100)
Failure in IC2000 and peripheral circuit
Failure in IC4100 and peripheral circuit
Yes
Is the input clock to
IC4100 normal?
[Observation point
<
]
No
Failure in IC
8
00 and peripheral circuit
No
Failure in IC2000 and peripheral circuit
Failure in IC2602 and peripheral circuit
Yes
Yes
LINK terminal does not work
Is the voltage of IC2602
power supply normal?
[
S
ee 10.
3
5 VOLTAGE
S
]
Is the RMII
communication normal?
[Observation point
^
]
No
Failure in the common mode filter(L2601, L2602)
Failure in the RJ45 connector(JA2600)
Failure in IC2602 and peripheral circuit
Yes
Is the differential line normal?
[Observation point
'
4
]
Failure in IC2602 and peripheral circuit
