Tascam 3030 - 2-12 Tape Speed Adjustment

$
2-12
TAPE SPEED
ADJUSTMENT
OSCI
LLATOR
FREOUENCY COUNTER
cH2
LINE
IN
cH2
OUTPUT
Fis.
2-16
2-12.I PtAY
SPEED
1. Connect a
frequency
counter to
either
0UTPUT
terminal.
2.
Load
TEAC YTT-2004
test
taoe.
Set
the
SPEED switch-HlGH.
and
PITCH
C0NT knob-0FF.
3.
Play
the
tape. Adjust HIGH
SPEED control
(see
Fig.2-17llora
reading
of 3,000H2
t5Hz.
4.
Check the
following
at the beginning and
the
end
of the tape.
Specifications:
Tape
speed deviation
3,000H2
130H2
Tapespeeddrift..
......15H2
5. Change
the
test tape to a
TEAC
YTT-2003
and SPEED switch
setting to L0W.
6.
Bepeat
steps
3 through 4. Adjust
LOW SPEED
control
if neces-
sary.
Pull
the
PITCH
C0NT
knob
out.
Set SPEED switch
H lGH. Play
a
YTT-2004.
Check if the speed variation
of at least
3,000H2
+180H2
is ob-
tained when
the
PITCH
C0NT
knob
is rotated fully
in both
directions.
Change the test tape to
YTT-2003
SPEED
switch setting to
L0W.
Repeat step
8.
FAST WINDING
SPEED
l.
Set
the
deck in vertical
oositi6n.
2. Connect oscilloscope between TPI test
point
on the
P0WER
PCB
and
ground.
3. Thread a TEAC
YTT-8013
test tape. In this case, either use of
Tinch reels or l0inch are
permitted
provided
both leftand
right
reels are tha
same size.
Ouring
fast fonrvard or rewind
mode, adjust R150(see Fig.
2-9)
so
that wavelength displayed on the oscilloscope becomes 7msec.
(Fig.
2-18). Adjustment should be
satisfied
at any tape
winding
position.
Check
that almost equal value
of
fast winding
speed
is obtained
between
fast forward
and rewind modes.
2-12 7-/.zH-t"EEg
2-12-I
FWD/REV PLAYZE'-F
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X2-17+nq
2.--).7.tr-
l-.iiEgF+
,E'y
J.
r l/
F
tr
-)1,,
.).4
'y
jl*
oFFt-t
rdi<.t.
3.ffi.t&
-
-;
2-12-2
FF/REW.XTJ-l.r
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*+Fa.]_TP.
1(Bl2-s8F1.) t-t>D7-_t
)e#frft:+
4.
z
.
i
'y
*?I*FF.E
-
l--
X I*REW=
F.
l.
t
.6
.
3.TP.loiEfrtaiQF<h\7
m
sec
{if*5S
-
l. R150
(X2-s+n4.\
effi*'q
6----..[x2-r8
4.
FFt REW(z\A
faf;/lfaY:.
X&6EAEd
6
.
Fig.2-17 FWD/REV
play
speed adjustment
points
Fig. 2-18
Waveform
at TPl
f
7.
8.
9.
4.
5.
!
DECK
under TEST
capstan
motor
HIGH
SPEED
LOW SPEED
10