Pioneer SX-LX70SW Service Manual page 55

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4. Contents of operation
• Basically, the operation of the service test mode is the same as that of the normal mode. In order to indicate that the
operation is in the test mode, the displays by function are as shown below.
[Functions]
HDMI1
HDMI2
HDMI3
Digital1
Digital2
Analog (RCA)
ipod
F.AudioIn
FM/AM
XM
SIRIUS
5. Contents of failures
• The contents of failures are classified depending on the error displayed at POWER ON as follows:
Error due to backup failure
S Y S B a c k U
TE
L 13942296513
S A T B a c k U
When an EEPROM failure of DSP occurs, "DSP BackUpERR" is displayed in 15 seconds after the power is turned on.
D S P B a c k U
In any case, the following causes are suspected:
1. The communication line to EEPROM (or Flash ROM) is broken or short-circuited.
2. The IC of EEPROM (or Flash ROM) itself has a defect.
Error due to detection of overcurrent
O C E r r o
O C E r r o
• If "OC ERROR" doesn't occurs in the next operation when the power is turned on in the normal mode, it is suspected that
the speaker terminal may be short-circuited.
1. When the customer set up, the volume was increased with the both poles of SP cable being short-circuited.
2. When the customer set up, the conductor of SP cable was in contact with the chassis of main unit.
• If "OC ERROR" occurs again, the following causes may be suspected:
1. Any (or some) of the four digital amplifier ICs (TAS5142DKD) in the AMP ASSY may be broken.
2. Any portion between the above digital amplifier ICs and the speaker terminal may be short-circuited.
3. At any portion between the above digital amplifier ICs and the system component (PDC157A8), the line for SHUTDOWN
may be short-circuited to the ground or broken.
4. The voltage of VG+12 is low (less than 10V).
Over temperature error
O v e r T e m
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• If "OVERTEMP" doesn't occur in the next operation when the power is turned on in the normal mode, there is no abnormality.
(It may be a temporary over temperature. Lower the volume.)
• If "OVERTEMP" occurs again, the following causes may be suspected:
1. Any (or some) of the four digital amplifier ICs (TAS5142DKD) in the AMP ASSY may be broken.
.
2. At any portion between the above digital amplifier ICs and the system component (PDC157A8), the line for XOTW
may be short-circuited to the ground or broken.
3. The heat sink is not installed properly. (Screws are loosened, silicone grease is not applied, etc.)
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Backup error for PDC157A8,164A8(system u-com) control
p E R R
p E R R Backup error for PEG393(digital radio u-com) control
p E R R Backup error of PEG117 (DSP u-com) control
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[FL display]
H D M I 1 S E R V
H D M I 2 S E R V
H D M I 3 S E R V
i g i t a l 1 S E R V
i g i t a l 2 S E R V
n a l o g S E R V
i p o d S E R V
. A u d i o I S E R V
T u n e r S E R V
X M R a d i S E R V
S I R I U S S E R V
Q Q
3 6 7 1 3 1 5
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SX-LX70SW
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0 5 8 2 9 9 4 2 8
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A
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