Toshiba 3787DB - Page 63

SCHEMATIC DIAGRAM MODEL: 3787DB — (5/5) OBSERVATION OF VOLTAGES AND WAVEFORMS NOTES:
1.
Voltages
read
with
VTVM
from
point
shown
to
chassis
ground,
line
voltage
220
1.
D.C.
resistance
value
of
a
principal
transforme
volts,
colour
bar
signal.
Voltages
reading
may
vary
+20%.
é
gram.
These are
measured
for separated
from
t
2.
All
waveforms
are
taken
using
a
wide
band
oscilloscope
and
a
lowcapacity
probe.
2.
The
circuits
are
subject
to*change
without
notic
3.
Waveforms
are
taken
using
a
standard
colour
bar
signal.
3.
$&
:
Solder
links.
CAUTION:
The
international
hazard
symbols
“/\,”
in
the
schematic
diagram
and
the parts
list
designate
com-
4.
Make
sure
that CONTRAST
and
COLOUR
controls
are
in
mid
position
and
ponents
which
have
special
characteristics
important
for
safety
and
should
be
replaced
only
with
types
identical
to
BRIGHTNESS
control
is
almost
in
maximum
position.
Set
other
controls
for
best
those in the original circuit or specified in the parts list. The mounting position of replacements is to be identical picture.
with originals. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTICE on page
3. Do not degrade the safety of the receiver through improper servicing.
1
2
ie
4
5
6
op
8
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A
B
OVOS NCD BOARD: PSB 7S35
C
D
E
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