Texas Instruments SLEU056 Description of Indicators, Power LED LED223, No S/PDIF Input LED LED222

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Description of Indicators

2.6 Description of Indicators

2.6.1Power LED (LED223)

The green LED indicates that the control circuitry at the TAS5010−5112F2EVM board is powered on.

2.6.2No S/PDIF Input LED (LED222)

The yellow LED indicates that the S/PDIF input signal is missing or it does not contain valid audio data.

Reasons to have a No S/PDIF warning:

-The lever at the S/PDIF input selector switch (S100) is placed in the wrong position.

-The S/PDIF signal is missing. Some DVD players remove the S/PDIF output signal when the drawer is opened.

Note:

When the SPDIF−MUTE signal from the S/PDIF receiver is disabled (JMP130 is shunting pin 2 and pin 3), the No S/PDIF indication is disabled.

2.6.3Temperature Warning LED (LED221)

The yellow LED indicates that the temperature of the TAS5112ADFD junction has reached the warning level. This is step one of the two-step thermal protection system implemented in the TAS5112ADFD device. The temperature warning is an indication only; the operation of the system is unchanged. If the temperature increases further and above the shutdown level, the error latch is set and the system goes into RESET mode. At this point, the Protection Mode LED will be lit as well as the Temperature Warning LED.

2.6.4Protection Mode LED (LED220)

The red LED indicates that protection circuit is engaged and it has put the output stage in shutdown mode.

Possible causes for shutdown mode:

-Two speaker terminals are shorted

-The amplifier is constantly overloaded (decrease volume level).

-One speaker terminal is shorted to ground (f.ex. through an oscilloscope)

-The output stage is in thermal shutdown due to overload.

Check the setup and board carefully and remove the cause of the failure before pressing RESET (S620) to disengage the protection mode.

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Contents User’s Guide Important Notice Products ApplicationsEVM Important Notice EVM Warnings and Restrictions Read This First About This ManualRelated Documentation From Texas Instruments Part Number Literature NumberContents Figures TablesTopic TAS5010−5112F2EVM FeaturesIntroduction TAS5010−5112F2EVM Features −1. Simplified TAS5010−5112F2EVM Block DiagramTAS5010−5112F2EVM Features Page Detailed Description of the EVM TopicBoard Overview MuteDouble-Speed Control JMP120 Description of Jumper SettingsEnable/Disable S/PDIF−MUTE JMP130 Default Jumper Positioins Description of Connectors1 S/PDIF Digital Audio Coaxial/RCA Input J100 2 S/PDIF Optical J101Pin No Description Analog Input Connector J160 Analog Output Connector J170Pin No Pin Description Net Name on Schematic PC and I2C Interface J300Loudspeaker Connectors J540, J541, J580, and J581 Power Supply ConnectorPin No Description Net Name at Schematic Reference Designator DescriptionDescription of Switches and Buttons Description of Indicators Power LED LED223Temperature Warning LED LED221 Protection Mode LED LED220EVM Board Operation Power Supply Power the EVM by One Power SupplyPower the EVM With Two Power Supplies Load = 6 ΩSetup the TAS5010−5112F2EVM With the S/PDIF Input Equalizer EnableSetup the TAS5010−5112F2EVM With the Analog Line Input Interfacing the Analog Line OutputControlling the DAP With PC Software Start-up SequenceHints for Measurement of Performance
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