Sony TC-150 - Section 3: Electrical Adjustments; Precautions and Tape Speed Adjustment

www.SteamPoweredRadio.Com
TC-150/ B.
BT-50
3-2.
ELECTR
I
CAL
ADJUSTMENTS
PRECA
UTION
l.
Clean
the
following parts with alcohol moistened
swab:
Record/Playback h
ead
Erase head
Capstan
Pinch roller
Rubber
belts
Idlers
2. Demagnetize
the
record/ playback head
with
a
head demagnetizer.
(Do
not
bring
the
head demagnetizer close
to
the
erase head, and
do
not use magnetized
screwdriver
for
adjusting).
3. After
the
adjustments, apply
the
locking
compound
to
the
adjusted parts.
4.
The
adjustments
shou
ld
be
performed in
the
order
listed in this service manual.
5.
The
adjustments should
be
performed
with
the
rat
ed po
wer
su
pp
ly
voltage
unle
ss
othe
rw
ise
specified.
1.
Tape Spe
ed
Adjus
tm
e
nt
Setting
s:
Power
sou
rce ................ 6 V
de
Pro
ce
dure:
1.
Mode playback
w.,.
4
9
SptJed
checker
(S
ONY
LFM
-
30}
(
JkHz
,
OdB}
or
digital
frequency
coun
t
er
~-
S8t
t4====
~
J'
EARPHON
E
Speficications
I)
I
Speed
checker
I
Digital frequen
cy
counter
I
li---±3-
%
----t
l
--29_1_0
_
H_z_~-30_9
_0_
H_z_
---t
l
2)
Fr
e
quency
difference between beginning and
end
of
tape should be within I
%
(
30
Hz).
2.
If
the
above specification is
not
satisfied, adjust
R40.
QR
40
0
-
10
-
,,