27
XW-NAC3-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5.6 ERROR INDICATIONS AND PROTECTION CIRCUITS
Error Indications and Specifications of Protect Circuits
LCD
Display
LED Indicator
Meaning of
Indication
Possible Cause
Point to be Checked
and Normal Value
Protect
Error
Flashing of the
STA
N
DBY/O
N
LED
A protection circuit
was activated.
Abnormal voltage at each power-supply IC
SI
N
GAL PO
W
= 14
V
P.CO
N
+12
V
= 12
V
P.CO
N
+5
V
= 5
V
AT+3.3
V
= 3.3
V
The XPROTECT line of System Ucom (IC1000) is
short-circuited.
IC1000-54 pin = 3.3
V
(Invalid during Power Standby mode)
Amp Error
Flashing of the
STA
N
DBY/O
N
LED
An abnormality was
detected at the
digital amp IC.
The power at the digital amp IC or its periphery
is abnormal.
V
+B = 14
V
V
+3R3 = 3.3
V
IC2002-pin 13, pin 27 = 3.3
V
A point on the line from the digital amp IC up to
the speakers is short-circuited (for example, dirt
is attached).
Check the path from the P
W
M output
of IC2002 to the speakers.
A point on the line from the digital amp IC up to
XOT
W
Pin 59 of the System Ucom (IC1000) is
short-circuited or broken.
IC1000-59 pin = 3.3
V
IC2002-14 pin = 3.3
V
The digital amp IC (IC2002) on the MI
N
PCB
Assy is in failure.
Check the peripheral circuits of IC2002.
ADAP.
PORT
Error
Flashing of the
STA
N
DBY/O
N
LED
Over current was
detected at the
adapter port.
The 5-
V
power line to the BT adapter was
short-circuited or broken.
V
P+5 = 5
V
(CP8002-1 pin)
An abnormality was generated in the control line
between the over-current detection IC (IC8301)
and the System Ucom (IC1000).
IC1000-33 pin, 67 pin = 3.3
V
IC8301-3 pin, 4 pin = 3.3
V
USB Error
Flashing of the
STA
N
DBY/O
N
LED
Over current was
detected at the USB
device connector.
The 5-
V
power line to the USB connector was
short-circuited or broken.
P.CO
N
+
N
ET5
V
= 5
V
An abnormality was generated in the control line
between the over-current detection IC (IC801)
and the System Ucom (IC1000).
IC801-3 pin, 4 pin = 3.3
V
IC1000-22 pin, 29 pin = 3.3
V
iPod a OC
Error
or
iPod b OC
Error
Flashing of the
STA
N
DBY/O
N
and
iPod a (or iPod b) LEDs
Over current was
detected at an iPod
port
The 5-
V
power line to the corresponding iPod
connector was short-circuited or broken.
V
IA+5
V
= 5
V
(CP7002-23, 24 pin)
V
IB+5
V
= 5
V
(CP7002-10, 11 pin)
Some abnormality was generated in the control
line between the over-current detection IC
(IC1703 or IC1704) and the System Ucom (IC1000).
iPod a:
IC3000-18 pin, 21 pin = 3.3
V
IC1703-3 pin, 4 pin = 3.3
V
iPod b:
IC3000-19 pin, 22 pin = 3.3
V
IC1704-3 pin, 4 pin = 3.3
V
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