Table of Contents
Advertisement
2-3. MTS DECODER CIRCUIT ADJUSTMENT
for VHR-790 (Australia)
If adjusting the MTS Decoder circuit, special equipment
Before making these adjustments,
be sure to make the
-
shown in section 2-4-1. is necessary.
adjustments
described
in section 2-1. " Servo Circuit.",
Improper
adjustment
will cause loss of performance
of
section 2-2. "Video Circuit Relay Jig. "
stereo sound and bilingual sound detection.
2-3-1. TEST
EQUIPMENT
AND STANDARDS
REQUIRED
Audio Multiplex TV signal Generator
Oscilloscope
AC Voltmeter
Low Path Filter
15 kHz (48dB/oct)
2-3-2.
LOCATION
OF ADJUSTMENT
POINTS
P36200E
3inl
'{
Tuner -__+
-----~
,,
II
,,
,,
,,
II
II
,,
,,
,,
,,
II
,,
,,
1,
II
,,
,,
,,
,,
,,
,1
,4
,1
,,
I
; ,,--,
I
, ,...,;
I
, ~.-,
$
,1
I,
VR
,,
t
8'--',
i-
{-~'~'~ X These VRS
are posi-
tioned with
,-,
::
the models.
on
CP-1 PWB (Foil side)
Fig. 2-3-1
Note:
Set the following
remote control button to the positions
indicated below, before making following adjustments.
I
REMOTE
CONTROL
BUTTON
I
POSITION
I
TAPE SPEED
SP
INPUT
AV
I
AUDIO
I
LR
I
2-3-3.
SEPARATION
ADJ.
Measuring
Point
Measuring
Equipment
AUDIO OUTPUT
Audio Multiplex TV
terminal
signal generator
EURO pin3 (Lch)
Oscilloscope
Low path filter
15 kHz (48 dB/oct)
Adj. Condition
I
E-E mode
Adj. Location
Adj. Value
VR631
(SEPARATION)
Minimum level
1.
2.
3.
4.
Input the output signal of the audio multiplex
TV signal
generator into the VCR ANT input terminal.
Connect the oscilloscope
to the audio output
terminal
EURO pin 3 (Lch) of the VCR via the LPF.
Set the audio multiplex TV signal generator as follows.
Audio signal Rch: 1 kHz 30?!0 modulation
Audio signal Lch: Unmodulation
Adjust VR631 (SEPARATION)
so that the output of the
audio output terminal (Lch) is brought to its minimum level.
–12–
Advertisement
Table of Contents
