Crown XLS 1000 Series Bedienungsanleitung

XLS1000 – 2500

Service Manual

142195-1 4/10

XLS3 Tech Support.doc

XLS-3 MENU:

The XLS main menu structure communicates functionalit of the amplifier in terms

of its input routing (MODE), filter selection (FILTER), and frequenc of the filter

(FREQ)…when available.

MODE: Amplifier audio routing.

STEREO: Channel 1 input to Channel 1 output, Channel 2 input to Channel 2

output.

BRID E: Channel 1 input to Channel 1, with the inverted Channel 1 input to

Channel 2. B taking the two positive outputs of the amplifier, twice the output

voltage (twice the power) is realized. In BRIDGE mode, Crossover (XOVER)

filters are not allowed since the same audio is required for both output channels.

INPUT Y: Channel 1 input to both Channel 1 and Channel 2’s processing and

output. Switching occurs pre-pot and pre-filter.

FILTER: Audio filtering.

BYPASS: Both channels are full spectrum audio (20Hz – 20KHz). In BYPASS

mode, no FREQ choice is allowed.

LOWPASS: Both channels are 4

order Linkwitz-Rile filters with frequenc

breakpoint determined b the FREQ choice.

HI HPASS: Both channels are 4

order Linkwitz-Rile filters with frequenc

breakpoint determined b the FREQ choice.

XOVER: When XOVER is selected, the MODE choice is automaticall changed

to INPUT Y. Channel 1 is fed to both channels’ processing with Channel 1 being

Lowpass and Channel 2 being Highpass. The crossover frequenc is determined

b the FREQ choice.

CLIP COMPRESSOR: Allows the clip compressor for each channel to be either

turned on or off. The Clip compressor is a proprietar algorithm that limits clipping

on a real-time basis.

DIA NOSTIC MENU:

A set of diagnostic menus can be accessed at an time b pushing all three menu

buttons at the same time. The amplifier continues to pass audio, but the diagnostic

menus are displa ed until the MODE/MENU button is pushed and normal amplifier

functionalit returns.

MODEL & VOLTA E TYPE: Displa s the Model and voltage t pe.

POWER SUPPLY TEMP & LOW VOLTA E RAIL: Displa s the Power

Suppl Heatsink Temperature and the Low Voltage rail (in volts).

AMPLIFIER CHANNEL TEMP: Displa s the heatsink temperature for the power

devices of each channel.

HI H VOLTA E RAILS: Indicates the Amplifier voltage rails, Positive (VP) and

Negative (VN).

FIRMWARE VERSION: Shows the firmware version.

FAULT STATUS: Indicates the latest fault that the amplifier has had and the

number of instances of that fault. Refer to the Error Codes section for specific

Fault/Error codes.

ERROR CODES:

The amplifier’s processor runs through a series of Power On Self Tests (POST) when

the amplifier is first powered up. If the processor encounters an error, it will

communicate the error via the front panel Thermal LED’s.

These error codes are unique and based upon a Major and Minor element. The Major

element is determined b which portion of the amplifier failed POST, while the

Minor portion is which part of the Major element failed. The are displa ed b CH1

Thermal LED = MAJOR, CH2 Thermal LED = MINOR. The MAJOR is blinked 1

then the MINOR.

MAJOR MINOR

ERROR COMMENT

0 1 Processor POST Fail Internal MCU error (PLL, etc)

0 2 Processor Assert Fail Something catastrophic in the

firmware.

0 3 Processor Watchdog Fail Firmware error where

watchdog timeout has not

been attended.

0 4 Power Fail Power Sequencing of the

Power Suppl has failed.

1 1 LCD POST Fail Initialization of LCD failed

1 2 LCD Communications Fail MCU unable to communicate

with LCD. Can occur

an time as opposed to POST

2 1 DSP Boot Fail MCU is unable to boot the

DSP via I2C

2 2 DSP POST Fail MCU was able to boot the

DSP, but not able to

communicate and control.

2 3 DSP Communications Fail Can happen an time. Would

have been found via Boot or

POST failure if full time I2C

problem

3 1 RUBY POST Fail Unable to communicate with

Rub on amplifier board

initiall .

3 2 RUBY Communications Fail I2C communications failure

for some reason. Not caught

at POST

3 3 RUBY ADC Sensor Fail An illegal ADC value was

encountered b MCA via

Rub

4 1 MFGTEST Result B te Failure APM’s MFGTEST b te

indicates test failure or not

tested.

4 2 MFGTEST GPIO Comm Fail APM is unable to

communicate with the MFG

Test fixture’s I2C GPIO

registers.

4 3 MFGTEST ADC Comm Fail APM is unable to

communicate with the MFG

Test fixture’s I2C ADC

registers.

CHASSIS LEVEL SELF-TEST:

This test is used to ensure the functionalit of the LCD, Buttons, and Fan once the

amplifier is assembled. The self-test is initiated b holding down the PREVIOUS

(middle) button during power up. The amplifier enters a test mode where all of the

front panel LED’s except the SPI indicators are lit. Additionall , the fan is at full

speed and the LCD indicates which of the three front panel buttons are pushed. Once

all three buttons have been pushed and released, the test completes and the amplifier

returns to normal operation.

APM SECTION THEORY OF OPERATION

ANALO INPUTS:

The input to the APM can accept 1.4Vrms input and drive the resultant APM output

to a level that drives the amplifier to full rated power into 8Ω. The differential analog

inputs come from J700 which connects to the MAIN board of the amplifier. The

input XLR, ¼”, and RCA connectors tie directl to this point on the MAIN board.

The following will be for CH2, with CH1 being identical except for the analog Y

input switch (U601).

U600-A,B form a differential to single ended gain stage with a gain of -3.54dB. See

Gain Block Diagrams below. The output of U600B drives the input of U601, which

is a unit gain amplifier that selects either the ‘A’ input (CH2) or ‘B’ input (CH1)

dependent upon the INPUT_Y drive from the microprocessor (Q600 to U601-1).

U601 provides the Input Y audio routing. The output of U601 drives front panel pot

R610 that feeds single ended amplifier section U600-C. This stage has a maximum

gain of +13.86dB as shown.

For CH2, the output of U601-5,6 drives a comparator, U700-B, that lights the front

panel SPI LED when the input signal is >-40dBu. R600/601 provides the DC bias

that provides the comparator reference point. For CH1, the input to the SPI indicator

comes from U500-7.

U600-D acts as a unit gain inverter that creates a differential signal (+6dB gain) to

feed the attenuator for either the TI DSP’s ADC (XLS1000) or Cirrus Codec

(XLS1500, 2000, 2500). For the XLS1000, R618-619, R621-623 form a voltage

divider and bias network into the TI DSP (CH2±_DSP_AD). In the case of the

XLS1500 – 2500, R613-614, R617, R620 form the voltage divider and bias network

into the Cirrus codec (CH2±_AD).

As ou can see, the major difference between the XLS1000 and XLS1500 – 2500

APM’s resides in the use of an external Cirrus Codec (U702) for the larger amplifiers.

This results in ~4dB better S/N, but at an additional cost of $2.

ANALO OUTPUTS:

The output of the APM is driven b a differential gain stage (U701-C,D) that receives

its input from the DAC. In the case of the XLS1000, the DAC resides within the TI

DSP (CH2±_DSP_DA), while in the case of the XLS1500 – 2500, the DAC is part of

the Cirrus codec (CH2±_DA). This gain stage matches the output of the DAC to the

amplifier’s input requirement of 5.66Vrms to drive the amplifier’s output to full rated

power.

DI ITAL PROCESSIN :

The TAS3202 is an integrated converter and DSP that provides all of our signal

processing at an affordable cost. The IC is powered from +3.3V and uses ~200mA.

Clock eneration:

The amplifier runs from a single clock that is generated b the TAS3202 (U703)

using the 24.576MHz cr stal, Y700. This clock is divided b 2 internall b the

DSP and sent to the microprocessor (MCLK_UP) and Cirrus codec

(MCLK_CODEC). The fundamental clock is divided internall in the DSP to

768KHz and sent to Divide-b -2 (U704-B) to provide differential 384KHz to the

MAIN board’s Rub PWM IC and the 384KHz is then divided b U704-A to

provide 192KHz to the MAIN SMPS via J700.

Digital Audio:

Andere Handbücher für XLS 1000 Series

Dieses Handbuch passt für folgende Modelle

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