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Teac MT-20D-IO - Page 80

Teac MT-20D-IO
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(23)
TP4
(frequency
control)
PCBA
Interface
Control
Test
point
for
measuring
the
frequency
control
signal
within
the
read
data
separator.
TP4
is
used
to
adjust
the
VFO
operating
point.
TP4
--
--
2.5
V
Fig.
346 Example
of
waveform
at
TP4
(24)
TP5
(read
data
pulse
R)
PCBA
Interface
Control
Test
point
for
measuring
the
read
data
pulse
R
signal.
TP5
is
used
to
check
the
operation
of
the
write/read
system.
J4-l7
RD
signal
~
TPS
-L-6
ns
(a)
"90
ips"
J4-l7
RD
signal
~
TPS
ilio
ns
, I
(b)
"30
ips"
Fig.
347 Example
of
waveform
at
TP5
- 368 -

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