Overall Level Characteristic And Distortion Factor Check; Overall S/N Check; Parts Arrangement Diagram For Adjustments - Sony SLV-SE610 Service Manual

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4. Overall Level Characteristic and Distortion Factor
Check
Purpose:
Check the record level, play level, and distortion factor against the
reference input.
Mode REC and PB (SP mode)
Signal 400 Hz, –6.3 dBs
Measurement point Audio output terminal
Measurement equipment Audio level meter and
distortion factor meter
Specified value Playback level: –6.3 ± 3.0 dBs
Distortion factor: 4% or less
Confirmation Method:
1) Supply an audio signal of 400 Hz, –6.3 dBs simultaneously to
both L and R channels of Audio Line Input.
2) Make recording
3) Play back a recorded portion.
4) Confirm that a playback level is –6.3 ± 3.0 dBs.
5) Confirm that a distortion factor is within 4%.

5. Overall S/N Check

Purpose:
Confirm that the S/N is within the specification.
Mode REC and PB (SP mode)
Signal Short
Measurement point Audio output terminal
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Measurement equipment Audio noise meter
Specified value –45.5 dBs or less
Confirmation Method:
1) Connect both L and R channels of audio line input to the GND.
2) Start recording.
3) Play the recorded part to confirm that the noise is below –45.5
dBs.
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PARTS ARRANGEMENT DIAGRAM FOR ADJUSTMENTS

MA-400 BOARD (Side A)
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SRV938EK BOARD (Side A)
7 1 19 1
6 2 2
18
CN202 CN201
VR251
+6 V
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2 4 2
9 8
6 1
CN262
5 0 8 9 2 4 9 8 2
m
7-6 E
9 9
9 9