19
SP-505
[5] ENCODER CHECK
Turn the encoder clockwise.
When the knob is fully turned until the meter displayed on the LCD reaches
MAX, “OK” is displayed.
Then, turn it counterclockwise.
When the system confirms that the meters have fully flilled in both directions,
it automatically proceeds to the next test.
[6] LCD CHECK
Confirm that the contrast becomes lighter when the encoder is turned
counterclockwise.
Confirm that the contrast becomes darker when the encoder is turned
clockwise.
Confirm that all displays go off when the [CURSOR R] key is pressed.
Pressing the [CURSOR R] key displays the entire screen in black.
Confirm that all dots function and that they are even.
If there is no anomaly, press the [CURSOR R] key and proceed to the next test.
[7] LINE IN CHECK
Connect a noise meter to the LINE OUT jack and measure the noise level.
Turn both [VOLUME] and [REC LEVEL] knobs to MAX.
L/R -65dBm or below (IHF-A)
Connect a monitor speaker (MA-10A, etc.) to the LINE OUT jack, and confirm
that there is no poor contact when the [VOLUME] and [REC LEVEL] knobs are
turned right and left.
Connect an oscilloscope to the LINE OUT jack so that the output waveform
can be observed.
Turn both [VOLUME] and [REC LEVEL] knobs to ‘MAX’.
Connect an osclllator to the LINE IN jack and input a 200Hz, 150mVp-p square
wave, then confirm that there is no anomaly in the waveform displayed.
Confirm that the waveform changes smoothly when the [VOLUME] and [REC
LEVEL] knobs are turned.
fig.test-line1
If there is no anomaly, press the [CURSOR R] key and proceed to the next test.
[8] PHONES CHECK
Connect an oscilloscope to the PHONES jack so that the output waveform can
be observed.
Turn both [VOLUME] and [REC LEVEL] knobs to ‘MAX’.
Connect an oscillator to the LINE IN jack and input a 200Hz, 150mVp-p square
wave, then confirm that there is no anomaly in the waveform displayed.
fig.test-phone1
If there is no anomaly, press the [CURSOR R] key and proceed to the next test.
[9] MIC CHECK
Connect an oscilloscope to the LINE OUT jack so that the output waveform
can be observed.
Turn the [VOLUME] knob to ‘MAX’ and the [REC LEVEL] to the center.
Connect an oscillator to the MIC jack and input a 200Hz, 100mVp-p square
wave, then confirm that there is no anomaly in the waveform displayed.
fig.test-mic1
If there is no anomaly, press the [CURSOR R] key and proceed to the next test.
[10] DIGITAL IN CHECK
It takes awhile for the system to recognize the digital signal for this test.
“Awaiting Digital Signal...” is displayed until the signal is recognized.
So after connecting digital equipment, wait for awhile.
Output
Input
Output
Input
Output
Input
Summary of Contents for SP-505
Page 3: ...3 SP 505 ...
Page 4: ...4 Oct 2001 LOCATION OF CONTROLS fig panel ...
Page 6: ...6 Oct 2001 EXPLODED VIEW fig explo ...
Page 13: ...13 SP 505 ...
Page 21: ...21 SP 505 ...
Page 24: ...24 Oct 2001 CIRCUIT BOARD MAIN BOARD ASSY 71788201 Up to Serial No ZP239739 ...
Page 25: ...25 SP 505 View from component side ...
Page 26: ...26 Oct 2001 CIRCUIT BOARD MAIN BOARD ASSY 71788201 Up to Serial No ZP239739 ...
Page 27: ...27 SP 505 View from foil side ...
Page 28: ...28 Oct 2001 CIRCUIT BOARD MAIN BOARD ASSY 71788201 From Serial No ZP239740 ...
Page 29: ...29 SP 505 View from component side ...
Page 30: ...30 Oct 2001 CIRCUIT BOARD MAIN BOARD ASSY 71788201 From Serial No ZP239740 ...
Page 31: ...31 SP 505 View from foil side ...
Page 32: ...32 Oct 2001 CIRCUIT BOARD SW SHEET ASSY 71788212 ...
Page 33: ...33 SP 505 71788212 View from component side ...
Page 34: ...34 Oct 2001 CIRCUIT BOARD SW SHEET ASSY 71788212 ...