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Sony SLV-286EE - VCO Adjustment; Secam; Audio System Adjustments Crrtssrrst; Normal Audio System Adjustment

Sony SLV-286EE
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2-3-7.
VCO
Adjustment
(RV-33
Board)
Purpose:
Adjust
to
lock
the
color
surely.
When
it
is
out
of
order,
the
picture
doesn’t
colored.
Fin
of
(COO
Adjusting
Element
TOO1
Specified
Value
2.5
+0.1
Vde
2-3-8.
SECAM
Discrimination
Adjustment
(RV-33
Board)
Adjusting
Method:
1)
Adjust
RV201
so
that
the
amplitude
of
1/2
fh
waveform
becames
4.8
+
0.1
Vp-p.
2
—+|
Fig.
7-2-11
SECAM
Color
bar
Pin
QD
of
IC201
oscilloscope
2-3-9.
VCO
Frequency
Adjustment
(MA-203
Board)
Purpose:
Adjust
to
set
the
character
position
on
the
screen.
Color
bar
Pin
@
of
IC601
Oscilloscope
(DC
mode)
+2.45
+
0.05
V
Vop
(5
V)
—\—_\|-__\\-—-
+2.45
+
0.05V
Mowe
ane
ee
eeed
ie
ceeee
wees:
GND=0
V
1H
Fig.
7-2-12.
75
2-4.
AUDIO
SYSTEM
ADJUSTMENTS
[Connection]
Audio
Audio
level
meter
or
generator
distortion
meter
|
|
oo——-oO
AUDIO
LINE
IN
AUDIO
LINE
OUT
Fig.
7-2-13.
2-4-1.
Normal
Audio
System
Adjustment
*
Make
adjustment
in
the
SP
mode,
unless
otherwise
specified.
Use
a
normal
VHS
cassette
for
an
adjustment
tape.
*
Set
AUDIO
MONITOR
to
normal.
1.
ACE
Head
Adjustment
Refer
to
the
service
manual
ADJUSTMENT
II.
of
VHS
MECHANICAL
2.
Recording
Bias
Adjustment
(MA-203
Board)
REC
and
PB
400
Hz,
—
27.5
dBs
7
kHz,
—
27.5
dBs
AUDIO
LINE
OUT
LorR
Audio
level
meter
RV301
O+1dB
Measurement
Point
Measuring
Instrument
Adjusting
Element
Specified
Value
Adjusting
Method:
1)
Supply
a
signal
of
400
Hz,
—
27.5
dBs
to
Audio
Line
Input.
2)
Connect
the
audio
level
meter
to
the
Audio
Line
Output.
3)
Adjust
the
attenuator
so
that
the
audio
level
meter
will
indicate
—
27.5 dBs.
4)
Make
recording
in
the
SP
mode.
5)
Set
an
audio
line
input
signal
to
7
kHz
and
make
recording.
6)
Playback
a
recorded
portion,
and
measure
output
levels
at
400
Hz
and
7
kHz.
7)
Confirm
that
the
7
kHz
playback
output
levels
within
a
range
of
the
400
Hz
playback
output
level
O
+
1
dB.
When
it
is
out
of
this
range,
sdjust
RV301
and
repeat
the
steps
|)
through
7)
above.
2-5.
PARTS
ARRANGEMENT
DIAGRAM
FOR
ADJUSTMENTS
RV-33
BOARD
(COMPONENT
SIDE)
MA-203
BORD
(CONDUCTOR
SIDE)
D502
(CATHODE)
D5V
t
RV502
SWITCHING
©)
Position
RV301
©)
[RECORDING
BIAS
RVO003
oe
©
ste)
VCO
RV004
15
1
=
16
30
CT601
O
vco
FREQUENCY
(|
RVOOS,
006
ICOO1
wooo
_\
|
REC
CHROMA
20
CN801
1
@
RV001
SECAM
DISCRI|
DISCRI
RV201
©
LU
fe)
c187@
7-6E
14
C121
on
cj
Q123
(EMITTER)
CNJOO1
LINE
IN/OUT

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