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6. Failures
• Depending on the types of errors, one of the following error messages will be displayed when the unit is turned on:
A
E E P
E R R
1. Breakage or short-circuiting of the communication line to the EEPROM can be suspected.
2. A failure in the EEPROM can be suspected.
O C
E
R R O
R
• If "OC ERROR" is not displayed when the unit is turned on in Normal mode, short-circuiting of the speaker terminals
can be suspected.
• If "OC ERROR" is displayed again when the unit is turned on in Normal mode, the following causes can be suspected:
1. One or more of the ICs among the three digital amplifier ICs (IC3201, IC3301, and IC3401: TAS5142DDV) on the
MAIN Assy is in failure.
2. The line between one of the above digital amplifier ICs and the speaker terminals is short-circuited.
3. The SHUTDOWN line from one of the above digital amplifier ICs to the system-control IC (PDC135A) is short-circuited
B
by grounding or is broken.
4. The voltage at VS+12 is low (less than 10 V).
5. (In a case when an error claimed by the customer could not be duplicated) The customer let the volume of the
speakers increase when two poles of the speaker cable had been short-circuited.
6. (In a case when an error claimed by the customer could not be duplicated) The customer let the conductor of the
speaker cable touch the chassis of the main unit.
O V E R
T E M
P
• If "OVERTEMP" is not displayed when the unit is turned on in Normal mode, the unit is normal.
(It might be caused by a temporary temperature rise.)
• If "OVERTEMP" is displayed again when the unit is turned on in Normal mode, the following causes can be suspected:
1. One or more of the ICs among the three digital amplifier ICs (IC3201, IC3301, and IC3401: TAS5142DDV) on the
C
MAIN Assy is in failure.
2. The XOTW line from one of the above digital amplifier ICs to the system-control IC (PDC135A) is short-circuited by
grounding or is broken.
3. Inappropriate installation of the heat sink (loose screws, failure to apply silicon grease, etc.)
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7. DSP error display
• Each time the SOUND key on the remote control unit is pressed while the power is on in Test mode, the DSP error display
and the normal display are alternately switched.
8. Accumulated power-on time display and speaker setting display
• You can check the accumulated power-on time and speaker settings by holding the AUDIO INPUT key on the Display unit
pressed for more than 8 seconds while the power is on in Test mode. While the key is held pressed, the accumulated
D
power-on time indication and speaker-setting indication are alternately displayed for 3 seconds each.
Speaker-setting display
Accumulated power-on time display
• Power-on time is always counted while the power is on, regardless of unit's functions and operations.
However, it is not counted during Standby mode.
• The maximum countable power-on time is 255H59M (255 hours 59 minutes.) The indication will not advance beyond that.
• The accumulated power-on time basically cannot be cleared.
Test Mode connecting point
A
MAIN ASSY
E
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At intervals of 3 seconds
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SIDE B
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Connecting point
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9 9
2 8
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