Table of Contents
Advertisement
| PCM-SOTES
A/D OFFSET
ADJUSTMENT
@ A/D
OFFSET
ADJUSTMENT
should
be made
later than that of D/A OFFSET.
Procedure:
VIDEO IN 1
Set
al
VIDEO OUT [}}
oscilloscope or
VTVM (DC range}
audio board
a
TP-3 O*--,
TP-1
O - —
bus bar o
1.
Connect
VIDEO-IN
and
VIDEO-OUT
ter-
minals, and connect the oscilloscope or VTVM
(both are DC range) to test point TP-1 (L-CH)/
TP-3 (R-CH) and bus bar (ground point).
2.
Turn the REC
LEVEL control to the minimum
(0).
3..
Adjust
the RV102
(L-CH)/RV202
(R-CH) so
that
the
oscilloscope
or
VTVM
reading
are
O+5 mV.
Adjustment Location:
audio board
RV102
TP3
bus bar
RV202
TP1
A/D DISTORTION
ADJUSTMENT
@
The low distortion AF OSC and the low distortion
measurement
equipment
are needed to make this
adjustment.
Procedure:
distortion
meter
LPF
30kHz
"ees
VIDEO IN jp
hon
LINE IN
LINE OUT
1.
Connect
VIDEO-IN
and
VIDEO-OUT
ter-
minals.
2.
Apply a 1 kHz, 0 dB (0.775 V) signal to LINE-
IN and connect
the distortion meter to LINE-
OUT.
3.
Adjust the REC LEVEL control so that OVER
of the level meters just light up.
4.
Decrease the input signal level from 0.5 to 1 dB
with the attenuator, and confirm OVER of that
goes out.
5.
Adjust the RV103
(L-CH)/RV203
(R-CH) for
minimum reading on distortion meter.
specification:
less than -85 dB
Adjustment Location:
audio board
RV103
RV203
Advertisement
Table of Contents
