Error Indications And Protection Circuits - Pioneer XW-NAC3-K Service Manual

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5.6 ERROR INDICATIONS AND PROTECTION CIRCUITS

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Error Indications and Specifications of Protect Circuits
LCD
LED Indicator
Display
Protect Flashing of the
Error STANDBY/ON LED
Flashing of the
Amp Error
STANDBY/ON LED
ADAP.
Flashing of the
PORT
STANDBY/ON LED
Error
Flashing of the
USB Error
TE STANDBY/ON LED
L 13942296513
iPod a OC
Flashing of the
Error
STANDBY/ON and
or
iPod a (or iPod b) LEDs
iPod b OC
Error
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Meaning of
Indication
A protection circuit
was activated.
An abnormality was
detected at the
digital amp IC.
Over current was
detected at the
adapter port.
Over current was
detected at the USB
device connector.
Over current was
detected at an iPod
port
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Possible Cause
Abnormal voltage at each power-supply IC
The XPROTECT line of System Ucom (IC1000) is
short-circuited.
The power at the digital amp IC or its periphery
is abnormal.
A point on the line from the digital amp IC up to
the speakers is short-circuited (for example, dirt
is attached).
A point on the line from the digital amp IC up to
XOTW Pin 59 of the System Ucom (IC1000) is
short-circuited or broken.
The digital amp IC (IC2002) on the MIN PCB
Assy is in failure.
The 5-V power line to the BT adapter was
short-circuited or broken.
An abnormality was generated in the control line
between the over-current detection IC (IC8301)
and the System Ucom (IC1000).
The 5-V power line to the USB connector was
short-circuited or broken.
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An abnormality was generated in the control line
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between the over-current detection IC (IC801)
and the System Ucom (IC1000).
The 5-V power line to the corresponding iPod
connector was short-circuited or broken.
Some abnormality was generated in the control
line between the over-current detection IC
(IC1703 or IC1704) and the System Ucom (IC1000).
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Point to be Checked
and Normal Value
SINGAL POW = 14 V
P.CON+12V = 12 V
P.CON+5V = 5 V
AT+3.3V = 3.3 V
IC1000-54 pin = 3.3 V
(Invalid during Power Standby mode)
V+B = 14 V
V+3R3 = 3.3 V
IC2002-pin 13, pin 27 = 3.3 V
Check the path from the PWM output
of IC2002 to the speakers.
IC1000-59 pin = 3.3 V
IC2002-14 pin = 3.3 V
Check the peripheral circuits of IC2002.
VP+5 = 5 V (CP8002-1 pin)
IC1000-33 pin, 67 pin = 3.3 V
IC8301-3 pin, 4 pin = 3.3 V
P.CON+NET5V = 5 V
0 5 IC801-3 pin, 4 pin = 3.3 V 8 2 9 9 4 2 8
IC1000-22 pin, 29 pin = 3.3 V
VIA+5V = 5 V (CP7002-23, 24 pin)
VIB+5V = 5 V (CP7002-10, 11 pin)
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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