8

Required Equipment

Clean, antistatic, well lit work area

High quality music source playback system

Compact Disc Player with stereo amplifier and 2 full range stereo speakers

Audio patch cables: 2 single-ended,shielded audio cables with RCA plugs on both ends for connecting the outputs of the compact disc player to the inputs of the DC-1

2 single-ended shielded audio cables with RCA plugs on one end and appropriate connectors on the other end for connection to the input of the stereo amplifier.

Low Distortion Oscillator: Single-ended 600Q output, <.005%THD

Audio input Y cables: shielded audio

Y cable with 2 RCA plugs on the

Y end and an appropriate connector to the Low Distortion Oscillator output.

DC-1 Remote Control

AUX: OF

TUNER:0D

TAPE: 0C

10. Press and hold ACCY then press DONE to return to the top of the diagnostics menu. Turn the front panel VOLUME knob until the display reads, Extended Diagnostics/Restart then press the front panel MUTE button. The unit will cycle and return to normal operation

Listening

Connect a music source to the DC-1. Slowly increase the volume level on the amplifier to a comfortable listening level and verify that the output is free from noise, distortion or any other audio irregularities.

Mute Test

For proper mute testing, the DC-1 must be set to full mute.

1. On the remote, press MENU ▲, ▼ or SELECT to access the Main Menu.

2. Press MENU T until the display reads Main Menu/Setup then press SELECT to enter the Setup Menu.

3. Use MENU ▼ to display Output Levels, then press SELECT.

4. Use MENU A or ▼ to display: Menu Mute Level /-30dB, then press SELECT to display: System Mute Assign/ -30dB.

5. Press MENU ▼ to display Full Mute. Press SELECT, then press DONE four times to resume normal operation.

6. Press MUTE (on the remote or on the front panel) and verify that the output signal disappears.

7. Press MUTE again and verify that the output signal returns.

8. To reset your Mute level return to the Output Levels menu and reset the dB value.

Performing these tests assures that the audio signal paths in the DC-1 are Audio Performance functional and that the DC-1 meets its published specifications. Verification

Input to Record Output Test

This test verifies the functionality of all the Audio Inputs of the DC-1 by checking gain, frequency response, THD+N, and S/N Ratio.

Setup

1. Attach the audio input cable between the Low Distortion Oscillator and the DC-1 left VCR1 input.

2. Attach the audio output cable between the DC-1 left Record output and the input of the Distortion Analyzer.

3. Put the DC-1 in Extended Diagnostics mode by powering up the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the display.

4. On the remote, press TAPE to select AUDIO Test.

5. Press and hold ACCY, then press RECORD. 94 on the display indicates that the record output is enabled for the selected DC-1 input.

6. TotesttheVCRI input, press and release RECORD, then press VCR1. The displayed code will change to 14 then to 13.

Required Equipment

Clean, antistatic, well lit work area

Low Distortion Oscillator : single-ended 600 ohm output < .005% THD

THD+N Distortion Analyzer with swit-chable 30kHz or audio bandpass filtering

Single-ended shielded audio cable with RCA plug on one end an appropriate connector on the other end for connection to the Low Distortion Oscillator output

Single-ended shielded audio cable with RCA plug on one end an appropriate connector on the other end for connection to the THD+N Distortion Analyzer

Procedure

1. Apply a 1 kHz signal at +12dBV (+4Vrms) to the input channel.

2. Set the scale on the Distortion Analyzer to measure +12dBV (+4 Vrms) signal level. Make sure any filters are off.

3. Verify that the output level from the DC-1 is +12dBV (+4 Vrms) +0.5dB.

4. Settheoscillatorfrequencyto 1kHz. Adjust the scale on the Distortion meter to measure 0.01% THD+N, and turn on the 30kHz low pass or audio bandpass filter. Verify that THD+N is less than 0.01%.

5. Use the output level from step 3 for the OdB reference to check frequency response. Turn the filter off. Sweep the oscillator frequency from 10Hz to 20kHz. Verify that the signal level is within ±0.5dB of reference level overthe frequency band.

6. Set scale on the Distortion Analyzerto measure-90dBr signal level. With the filter on, either turn off the output from the oscillator or disconnect the oscillator from the DC-1 input. Verify that the noise floor is less than -90dBr.

7. To test the right channel, reconnect the cables to the associated right input.

8. To test the remaining inputs, repeat steps 5 and 6 of the Setup instructions. Move the cable to the next audio input and press the appropriate buttons on the remote to activate the path for test. The reference numbers for each path are:

RECORD, VCR1: 14, 13 RECORD, VCR2:14, 12 RECORD, V-DISC: 14,11 RECORD, TV: 14,10 RECORD, AUX: 14, OF RECORD, CD: 14, 0E RECORD, TUNER: 14, 0D RECORD, TAPE: 14, 0C

Input to Zone 2 Output Test

Setup

1. Attach the audio input cable between the Low Distortion Oscillator and the DC-1 left VCR1 input.

2. Attach the audio output cable between the DC-1 ZONE2 left output and the input of the Distortion Analyzer.

3. Put the DC-1 in Extended Diagnostics mode by powering up the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the display.

4. On the remote, press TAPE to select AUDIO Test.

5. Press and hold ACCY, then press RECORD. 94 on the display indicates that the Zone 2 output is available to any of the DC-1 inputs.

6. TotesttheVCRI input, press and release RECORD, then press VCR1 .The displayed code will change to 14 then to 13.

Procedure

1. Apply a 1 kHz signal at +12dBV (+4Vrms) to the input channel.

2. Set the scale on the Distortion Analyzer to measure +12dBV (+4Vrms) signal level. Make sure any filters are off.

3. Verify that the output level from the DC-1 is +9.5dBV (+3 Vrms) ±0.5dB.

4. Set the oscillator frequency to 1 kHz. Adjust the scale on the Distortion Analyzer to measure 0.01% THD+N, and turn on the 30kHz low pass or audio bandpass filter. Verify that THD+N is less than 0.01 %

5. Using the output level from step 3 forthe OdB reference, check the frequency response. Turn the filter off. Sweep the oscillator frequency from 10Hz to 20kHz and verify that the signal level is within ±0.5dB of reference level over the frequency band.

6. Set scale on the Distortion Analyzerto measure -90dBr signal level. With the filter on, either turn off the output from the oscillator or disconnect the oscillator from the DC-1 input. Verify that the noise floor is less than -90dBr.

7. To test the right channel, reconnect the cables to the associated right input.

8. To test the remaining inputs, repeat steps 5 and 6 of the Setup instructions. Move the cables to the next audio input and press the appropriate button on the remote to activate that path, then repeat the procedure. The reference numbers for each input path are:

RECORD, VCR1:14,13 RECORD, VCR2: 14, 12 RECORD, V-DISC: 14,11 RECORD, TV: 14, 10 RECORD, AUX: 14, OF RECORD, CD: 14, 0E RECORD, TUNER: 14, 0D RECORD, TAPE: 14, 0C

Audio Output Test

This test verifies the functionality of all main audio paths. The performance of the

A/D and D/A conversion circuitry are checked through gain, frequency response, THD+N, and S/N Ratio tests.

Setup

1. Attach the audio input cable between the Low Distortion Oscillator and the DC-1 left VCR1 input.

2. Attach the audio output cable between the DC-1 left Front output and the input of the Distortion Analyzer.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. On the remote, press TAPE to select AUDIO Test.

5. Press and hold ACCY, then press ON. 98 will appear on the display to indicate that the Audio Output Test is set.

6. To test the VCR1 input, press VCR1 on the remote. The display will show 13.

Procedure

1. Apply a 1 kHz signal at +12dBV (+4 Vrms) to the input channel.

2. Set the scale on the Distortion Analyzer to measure +12dBV (+4Vrms) signal level. Make sure any filters are off.

3. Verify that the output level from the DC-1 is +12dBV (+4Vrms) ±0.5dB.

4. Set the oscillator frequency to 1 kHz. Adjust the scale on the Distortion Analyzer to measure 0.01% THD+N, and turn on the 30kHz low pass or audio bandpass filter. Verify that THD is less than 0.01%

5. Using the output level from Step 3 for the OdB reference, check the frequency response. Turn the filter off. Sweep the oscillator frequency from 10Hz to 20kHz. Verify that the signal level is within ±0.5dB of reference level over the frequency band.

6. Set scale on the Distortion Analyzerto measure -90dBr signal level. With the filter on, either turn off the output from the oscillator or disconnect the oscillator from the DC-1 input. Verify that the noise floor is less than -90dBr.

7. To test the right channel, reconnect the cables to the associated right input.

8. Repeat for each of the six remaining main outputs of the DC-1.

RECORD, VCR1: 14, 13 RECORD, VCR2: 14, 12 RECORD, V-DISC: 14,11 RECORD, TV: 14, 10 RECORD, AUX: 14, OF RECORD, CD: 14, 0E RECORD, TUNER: 14, 0D RECORD, TAPE: 14, 0C

Required Equipment

Compact Disc Player, orothersource with 44.1kHz sample rate, digital coax and optical outputs

Stereo amplifier and 2 full range stereo speakers.

2 single-ended,shielded audio cables with RCA plugs on both ends for connecting the outputs of the audio source to the inputs of the DC-1

2 single-ended, shielded audio cables with RCA plugs on one end and appropriate connectors on the other end for connection to the input of the stereo amplifier

Digital Input Tests

As this test verifies only the digital inputs, it is important that all previous tests from this section be performed first.

Setup

1. Connect the coaxial digital audio source to the DC-1 Coax 1 input.

2. Connect the DC-1 left and right Front audio outputs to the amplifier left and right inputs, and turn down the volume level control on the amplifier.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TAPE on the remote to select AUDIO Test.

5. Press and hold down ACCY, then press CD to select a digital input source. The display should read: AUDIO Test 8E.

6. Press EFFECTS ▼ to select Coaxl for testing. 1B will be displayed to indicate the Digital Input Test path is set.

Procedure

1. With the audio source playing, slowly increase the volume level on the amplifier to a comfortable listening level and verify that the outputs are free from noise, distortion or any other audio irregularities.

2. To test the remaining three digital inputs, the following button pushes must be performed in step 6 of the Setup instructions:

To test Coax 2, press EFFECTS. 1A will be displayed.

To test Optical 1, press and hold ACCY, then press EFFECTS. 9B will be displayed.

To test Optical 2, press and hold ACCY, then press EFFECTS. 9A will be displayed.

3. To discontinue digital input testing and return to the Extended Diagnostics menu, press and hold ACCY, then press DONE. Press DONE again to completely exit Extended Diagnostics.

AC-3 Output Tests Setup

1. Connect the Digital source to the DC-1 COAX 1 input (Optical 1 if using optical cable).

2. Connect the DC-1 Left Front audio output to the amplifier's left input, and turn down the amplifier volume control.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both thefront panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TAPE on the remote to select AUDIO Test.

5. Press and hold down ACCY, then press AUX on the remote. This will set the digital audio input path in the DC-1 through the AC-3 board.

6. Pressing the following sequence of buttons will complete the path through the DC-1 and set it to the Left Front Output.

Press and hold ACCY, then press BYPASS.

Release both buttons and press DONE.

Press and release AUX, BYPASS, then BAL LEFT.

Press and hold ACCY, then press BAL FRONT.

Release both buttons and press DONE .

This sets the unit to pass audio to the Left Front Output.

Required Equipment

1 DAT Player or other source with 48kHz sample rate, digtal coax or optical outputs.

1 digital audio cable: single ended shielded cable with RCA plugs (coaxial) or Toslink (optional)

1 Single ended shielded cable with RCA plug on one end and an appropriate connector on the other end for connection to stereo amplifier.

1 Stereo Amplifier

2 full range speakers.

Procedure

1. With the audio source playing, slowly increase the volume on the ampilfier to a comfortable listening level and verify that the ouput is free from noise, distortion, or any other audio irrégularités.

2. To test the remaining 7 Outputs replace the the remote button pushes in step 6 of the Setup section with the ones listed below. Be sure to connect the corresponding output selected for test to the amplifier.

Front Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL RIGHT ACC/BAL FRONT DONE

Center Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL LEFT ACCY/BAL RIGHT DONE

Subwoofer Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL RIGHT ACCY/BAL RIGHT DONE

Left Side Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL LEFT ACCY/BAL LEFT DONE

Right Side Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL RIGHT ACCY/BAL RIGHT DONE

Left Rear Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL LEFT ACCY/BAL BACK DONE

Right Rear Output

ACCY/BYPASS DONE

AUX, BYPASS, BAL RIGHT ACCY/BAL BACK DONE

Video

Input/Output Tests

Required Equipment

VCR or V-Disc player with both Composite and S-Video outputs

Color TV Monitor with both Composite and S-Video inputs

1 single-ended, shielded video RCA cable

1 single-ended, shielded S-Video cable

These tests verify that the five composite inputs, the three S-Video inputs, and the video outputs are passing video.

Composite Input to Monitor Output Test

Setup

1. Connect the composite video output from the VCR to the DC-1 VCR1 composite video input.

2. Connect the composite video Monitor output to the monitor composite video input.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TV on the remote to display VIDEO Test.

5. Turn on the video source and the monitor.

Procedure

1. To test the VCR1 input to Video Monitor output path, press VCR1 on the remote. 13 will appear next to the VIDEO Test message on the display indicating the path has been set

2. Press Play on the video source.

3. Verify that a clear, undistorted picture appears on the monitor.

4. Pause the video source.

5. Move the cable to the next video input and press the corresponding button on the remote to activate that path fortest, then repeatthe above procedure.

The reference numbers for each input path are:

Composite Input to Record Output Test Setup

1. Connect the composite video output from the VCR to the DC-1 VCR1 composite video input.

2. Connect the composite video Record output of the DC-1 to the monitor composite video input.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TV on the remote to display VIDEO Test.

5. Turn on the video source and the monitor.

Procedure

1. To test the VCR1 input to video record output path, press and release RECORD on the remote. 14 will appear next to the VIDEO Test message. Press VCR 1 on the remote. 13 will appear next to the VIDEO Test message, indicating the path has been set.

2. Press Play on the video source.

3. Verify that a clear, undistorted picture appears on the monitor.

4. Pause the video source.

5. Move the cable to the next video input and press the corresponding button on the remote to activate that path fortest, then repeatthe above procedure.

The reference numbers for each input path are:

RECORD, VCR 1: 14, 13 RECORD, VCR 2: 14, 12 RECORD, V-DISC: 14,11 RECORD, TV: 14, 10 RECORD, AUX: 14, OF

S-Video Input to Monitor Output Test

Setup

1. Connect the S-Video output from the VCR to the DC-1 VCR1 S-Video input.

2. Connect the S-Video Monitor output of the DC-1 to the monitor video input.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TV on the remote to display VIDEO Test.

5. Turn on the video source and the monitor.

Procedure

1. To test the VCR1 input to video monitor output path, press and hold ACCY on the remote, then press VCR1. 93 will appear next to the VIDEO Test message on the display of the DC-1, indicating the path has been set.

2. Press Play on the video source.

3. Verify that a clear, undistorted picture appears on the monitor.

4. Pause the video source.

5. Move the cable to the next S-Video input and press the appropriate buttons on the remote to activate that path fortest, then repeat the above procedure.

The reference numbers for each input path are:

ACCY/VCR1:93 ACCY/VCR2:92 ACCY/V-DISC: 91

S-Video Input to Record Output Test Setup

1. Connect the S-Video output from the VCR to the DC-1 VCR1 S-Video input

2. Connect the S-Video Record output of the DC-1 to the monitor S-Video input.

3. Put the DC-1 in Extended Diagnostics mode by applying power to the DC-1 while pressing and holding down both the front panel REC/ZONE2 and EFFECT buttons until Extended Diagnostics appears on the front panel display.

4. Press TV on the remote to display VIDEO Test.

5. Power on the video source and the monitor.

Procedure

1. To test the VCR1 S-Video input to video record output path, press and release RECORD. 14 will appear next to the VIDEO Test message. Press and hold ACCY, then the VCR1 button on the remote. 93 will appear next to the VIDEO Test message on the display of the DC-1, indicating the path has been set.

2. Press Play on the video source.

3. Verify that a clear, undistorted picture appears on the monitor.

4. Pause the video source.

5. Move the cable to the next S-Video input and press the corresponding button on the remote to activate that path for test, then repeat the above procedure.

The reference numbers for each input path are:

RECORD, ACCYWCR1: 14, 93 RECORD, ACCY/VCR 2:14, 92 RECORD, ACCY/V-DISC: 14, 91

0 0

Post a comment