Sony WM-BF49 - Page 4

WM-BF49
Tape Speed Adjustment
Procedure : |
Mode : playback
WG: West Germany
‘speed
checker
or
headphones
jack
. test tape | digital frequency
KNOB (TUNE) | WS-48A | counter | | | | |
(3kHz,0dB)
,
@Repeat
the
procedures
in
each
adjustment
several
times,
and the frequency coverage and tracking adjustments
should be finally done by the trimmer capacitors,
waned,
CTSNET A ie SCIEE RPOERE DERN ES EAE ETIETE,
VVDAL ALY VV B= =<
i
| memedbekadeth tot A LL Titiiity
at
Neat
headphones jack
(earphones)
FM
Frequency
Coverage
Adjustment
©
Sawencaa
Pointer
66
deaauenc
Adjustment
Reading
on
position
q
¥
part
VTVM
Specification :
wm
87,0MHz
speed
checker
digital
frequency
counter
(TAPE.
END)
f
mini
:
|
:
:
f minimum «020M
;
.
(107.8MHz)
Frequency difference between the beginning and the end
of
the
tape
should
be
within
+1.5%
(+45Hz),
FM
Tracking
Adjustment
,
SG
and
set
Raise
‘
Readi
fraquency
justment
par
Reading
on
VTVM
87.0MHz L2
(87.35MHz)
maximum
109.0MHz
MW Frequency Coverage Adjustment
Point
position
part
VTVM
520kHz
(526.5kHz)
maximum
- SECTION 2
CAL
AND
ELECTRICAL
ADJUSTMENTS
Adjustment
Location
TS ELECTRICAL ADJUSTMENTS
ICASSETTE SECTION
Playback Head Phase Check
TION
ith
a
denatured
—
alcohol
—
,
.
Note
:When
replacing
the
head,
check
the
both
L-ch
and
R-ch
phases,
roller
Procedure :
Phase Check
Mode : playback
ad with a head demagne-—
(1,606.5kHz)
wdriver for the adjustments,
suitable
locking
compound
MW
Tracking
Adjustment
performed with the rated
otherwise ‘noted,
test tape ;
P-4-A063 ; / L-CH
(6.3kHz,
—
10dB)
oscilloscope
ELECTRICAL
ADJUSTMENTS
pu
pes
Adjustment
part
Reading
on
VTVM
sin TUNER SECTION
AM rf_ signal
generator
il
ADJUSTMENT LOCATION
ia ee
headphones jack
(earphones)
Put the lead-wire
_ antenna close to the set.
30% amplitude
modulation by
400Hz signal
Output lavel: as low as possible
-cm
z* inch)
CQ102C
eeeule | in phase 4 |
eee ea parma FM rf signal
CQ-201B good | generator
CQ-102C
Oo 22.5kHz frequency
deviation by 1kHz signal
Output level: as low as possible
-©cm
z ° inch)
Torque Meter
z ° inch) .
FM antenna terminal component side
Meter Reading
Note:
BAND SW at MONO.
more than 90g (1.260z)