Sony SLV-495 - Overall Output Level and Distortion Factor Check; Overall Noise Level Check; TUNER SYSTEM ADJUSTMENT -E-:-:Ss:sesssseeesesseseeeees; 2-6-1.Separation Adjustment (MA-289 Board)

* Normal Audio System Adjustment
¢ Adjust in the SP mode if there is no special indications.
* Perform the adjustment setting the switch on the following
‘positions.
switch
switch
*1) Set by remote commander. (SLV-675HF/676HF/685HF/
695HF/L60HF/L70HF/X6HF)
[Adjustment Method]
1. ACE head adjustment.....Refer to the VHS mechanical
adjustment manual IV.
2. E-E output level check
3. Overall Output level and distortion factor check
4. Overall noise level check.
2-5-2. ACE Head Adjustment
Refer to the “VHS mechanical adjustment manual IV” (9-973-623-
11).
7-6
2-5-3. E-E Output Level Check
400Hz, -7.5dBs: Audio LINE IN
Audio LINE OUT terminal
Audio level meter
Specified value -7.5 + 2dBs
[Check Method]
1) Input signal of 400Hz and -7.5dBs to the audio input.
2) Check that the audio output level is -7.5 + 2dBs.
r)
2-5-4. Overall Output Level and Distortion Factor
Check
[Mode ____—_| Self-ecord playback ——SS—*d
Specified value
[Check Method]
1) Input signal of 400Hz and -7.5dBs to the audio input.
2) Record signal.
3) Playback the recorded portion.
4) Check that the output level is -7.5 + 3dBs.
5) Check that the distortion factor is 4.0% or less.
Audio level meter and Distortion
meter
Playback Level: —7.5 + 3dBs
Distortion: 4.0% or less
2-5-5. Overall Noise Level Check
| Mode | Self-record playback
Signal No signal (Insert a shorting plug into
the Audio LINE IN terminal)
Audio LINE OUT terminal
Measuring instrument | Audio level meter (IHF-A weighing
filter is used)
Specified value — 46dBs or less
[Check Method]
1) Record.
2) Playback recorded portion.
3) Check that noise level is — 46dBs or less.
2-6. TUNER SYSTEM ADJUSTMENT
2-6-1. Separation Adjustment (MA-289 Board)
60-80dBm/75Q terminated
Measuring insrument
[Adjustment Method]
1) Feed the RF signal from RF IN terminal.
2) Adjust with RV731 so that the output level satisfies the specified
value.
RF signal
Video : Color bar (100%)
white modulation
Audio : Mono 400Hz
100% modulation