Sony SLV-E170EE - Page 54

2-4-6.
Playback
Level
Check
(MA-293
Board)
[Check Method]
1)
Check
that
the
playback
level
satisfies
the
specified
value.
Fig. 7-2-9.
2-5. AUDIO SYSTEM ADJUSTMENT
*
For
the
adjustment
of
the
audio
system,
perform
in
the
SP
mode
if there is no special notes. Use the alignment tape.
[Connecting Instruments]
Audio line input
aaer
:
Audio
level
meter
Audio
line
output
or
distortion
meter
Fig. 7-2-10.
* Adjust in the SP mode if there is no special indications.
*
Perform
the
adjustment
setting
the
switch
on
the
following
positions.
©
LCHANNEL
|
switch
..0....cccccesecsseccssesesssesseceececscees
LINE
[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.
2-5-1. ACE Head Adjustment
Refer
to
the
“VHS
mechanical
adjustment
manual
IV”
(9-973-623-
11).
2-5-2, E-E Output Level Check
[Signal =| 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.
2-5-3. Overall Output Level and Distortion Factor
Check
Self-record playback
400Hz, ~7.5dBs: Audio LINE IN
[Mode i
Audio LINE OUT terminal
Audio level meter and Distortion
meter
Specified value Playback Level: -7.5 + 3dBs
Distortion: 4.0% or less
[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.
2-5-4. Overall Noise Level Check
|Mode sid Self-record playback
No signal (Insert a shorting plug into
the Audio LINE IN terminal)
Audio LINE OUT terminal
Audio level meter (IHF-A weighing
Specified value
filter is used)
[Check Method]
1) Record.
2) Playback recorded portion.
3) Check that noise level is ~ 46dBs or less.
2-6. ADJUSTMENT PARTS LOCATION DIAGRAM
MA-293
BOARD
(CANDUCTOR
SIDE)
CJ540 LLINE IN/OUT
7-6E