30
XW-NAC3-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
s
S y
c
n
:
V
e r
. 0 1 0 0
o
b
S u
c
n
:
V
e r
. 0 1 0 0
o
s
D e
t
: J
d
M o
e
: U p p e r
l
5
2
5
5 9 M
H
<<After a shutdown caused by an EEPROM failure>> EEPROM Error
1. Any communication line to the EEPROM may be broken or short-circuited.
2. The EEPROM IC itself may be defective.
<<After detection of an XOTW D-AMP-related error>> Amp Error
• If “Amp Error” is not displayed when the unit is turned on in
N
ormal mode next time, there is no Amp Error anymore.
(As this error may be generated because of temporary temperature rise, try to lower the volume.)
(
N
ote that the volume is set to 0 after an amp error was generated.)
• If an amp error is generated again, the possible causes are as follows:
1. The digital amp IC on the MAI
N
PCB Assy is in failure.
2. A point on the line from the above-mentioned digital amp IC up to the speakers is short-circuited (for example,
dirt is attached).
3. A point on the line from the above-mentioned digital amp IC up to Pin
N
o. 69 of XOT
W
of the System Ucom
(IC1000) is short-circuited with ground or broken.
4. The power for the digital amp IC is abnormal.
5. Accumulated power-on time display
• If the I
N
PUT SELECTOR key on the main unit is held pressed for 8 sec during power-on in Test mode, the accumulated
power-on time is displayed after the versions for various microcomputers are displayed.
After 3 sec
Accumulated power-on time
• Accumulated power-on time is always counted, regardless of selected functions or operations.
(Standby hours are not counted.)
• Maximum countable time is 255 H 59 M. After that, the value will not increase. (The indication will not change.)
• Basically, the accumulated power-on time cannot be cleared. (To clear the time, you must enter a special mode for CA
checking, which is used on the production line [not disclosed].)
Display of
V
ersions of Software for
V
arious Microcomputers
4. Types of Errors
• The errors are classified into the following categories and indicated with the following error indications:
<<After an XPROTECT power error was detected>> Protect Error
• Abnormal power was detected.
1. The voltage of SIG
N
AL_PO
W
, P.CO
N
+12
V
, P.CO
N
+5
V
, or AT+3.3
V
exceeded the specified value because
of a failure in the corresponding power supply unit.
2. The line up to Pin
N
o. 54 of XPROTECT of the System Ucom (IC1000) was short-circuited to ground or broken.
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