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5
7.1.2 TROUBLESHOOTING
QQ
(1) In a case where the power is not turned on (the POWER LED does not light)
3 7 63 1515 0
TX side
The protection circuit may have
been activated. Use the
adaptor dedicated to the
Insert the FFC
Narrow down the point in failure.
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L 13942296513
(2) In a case where no sound is output
TX side
Check the power and input/output
voltages at IC1501, IC1502, and
IC1503.
The DSP may not be operating
properly. Check the communication
between IC1301 and IC1303 and
that between IC1301 and IC1401.
Check the communication lines for
the clock (such as, IC1202, IC1203,
and resistors).
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No
XW-HT1.
No
correctly.
No
No
No
No
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8
No power
(The POWER LED does not light.)
Is the
AC adaptor for the
XW-HT1 being
used?
Yes
Is the
FFC correctly
inserted?
Yes
Are electric
potentials at each
measuring point
normal?
Yes
Check the communication between
IC1301 and IC1303 and that
between IC1301 and IC1401.
Q Q
3
6 7
1 3
No sound
Is the
voltage at each
IC correct?
Yes
Is MCK
(18.432 MHz) correctly
output from Pin 30
of IC1301?
Yes
Are MCK,
BCKO, and LRO that are
output from the DSP properly
input to IC1201, IC1601,
IC1631, and IC1661?
Yes
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Check the audio lines to narrow
down the point in failure.
.
XW-HT1
6
7
2 9
9 4
2 8
• Communication between IC1301 and IC1303 is
initiated only immediately after the power is
turned on.
• Communication between IC1301 and IC1401 is
initiated immediately after the power is turned on
and when modes are changed.
1 5
0 5
8
2 9
9 4
m
co
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8
9 9
A
B
C
2 8
9 9
D
E
F
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