Sony CFD-K10 - FM Steero VCO Adjustment; Carrier Frequency

CFD.KlO
TU
.
AM Section
AM rt signal
geneftrtor
Afl FREQUENCY COYERAGE
ADJUSlTENT
adiustment
reading on
disital
voltmeter
frequency
indicator
L4 2.1i0.IV
53lkHz
confirm
ur'ithin 8.0 to 9.0V
1,611kH2
l-f ,
Put the lead'wrre
l ,c\ |ry îi:":i'*""
| / )',zr\ \ I ll
"'-
|
!-J
I tr
r
I tl
| \./ è-_t_)t
-9-r-_
30% amplitude
rnodulation
by
400H2
signal
oulput
level:
as low as
possible
.
FM Section
FM rl signal
generator
FM antenna
InpuI
deviation by
400H2 signal
output
level: as low as
æssible
WvM
(range:
0.5-
svac)
r
Repeat
the
procedures in each
adjustment
several
times,
and
the
frequency
coverage
and
tracking
adjustments
should
be
finally
done
by the
trimmer
capacitors.
FÙI FREQUENCY
COVERAGE
ADJ U ST
I'ETIT
adjustment
reading on
disital
voltmeter
ftequency
indicator
L2
3.7+0.1V
87.5MHz
c'r2
9.0t0.1v
I08MHz
FT TRACKIT'G
AOJUSTfgI{T
Adjust
lor a maximurn
reading
on
VTVM.
L1
crl
87.5MHz
108MHz
Adiust
Ior a maximum reading on
VTVM.
L3
cT3
621kHz
l,404kHz
FM
Stereo
VCO Adjustment
Procedure :
.
BAND
switch....FM
FM
rf
signal
generalor
0.001r
F
lC1
pin@
(FM
IF
INPUT)
Output
level: 70dB
Carrier
frequency:
The
frequency
indicated
by the color
on
the caramic
filter
(CFL'
2' 3)
Color
Carrier
Frequency
white
I0.7SMHz
Output
level
: 70dB
Adjust
RVl so
that the
frequency
counter
reads
76OkHz+
0.1kHz.
Adjustment
Location:
tuner
board
(See page
36.)
I
-
F-t
r+
I
Carrier
frequency:
87.sMHz
,fi
headphones
iack