Jitter Check; Playability Check; Laser Current Check - Aiwa XR-M101 Service Manual

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3.JITTER CHECK

1) While oscilloscope is kept connected in the same test point as in step2. RF
WAVEFORM CHECK, connect the output terminal of an oscilloscope to the input
terminal of the jitter meter.
2) Set the VOLT range selector of oscilloscope to 500mV range or below.
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3) Play back 2 track of TCD-782.
4) Check that jitter meter indicates 28.0ns or less.
4. PLAY ABILITY CHECK
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1) Play back the 3 , 8

5.LASER CURRENT CHECK

*Do not perform this measurement unless the laser is suspected to be defective.
1) Connect digital multi-meter across the resistor R402(10Ω).
2) Play back the TCD-782 and check the DC voltage value on the digital multi-meter.
3) Calculate the laser current (Iop) by dividing the DC voltage across R402 by the
resistor value (R402= 10Ω). Check that the laser current (Iop) is 60mA or less.
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and 13 track of ATD-001. Check that the noise does not occur sound skipping does not occur.
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RF SW
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3 6 7 1 3
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2 9 9 4 2 8
OSCILLOSCOPE
OUTPUT INPUT
DIGITAL MULTIMETER
V
R402
R402
1 5 0 5 8 2 9 9 4
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9 9
JITTER METER
ns
2 8 9 9