Toshiba 3787DB - Page 55

SCHEMATIC DIAGRAM
MODEL: 3787DB
AUDIO OUT
(FIX)
(3/5)
CAUTION:
The
international
hazard
symbols
“
Q\’
in
the
schematic
diagram
and
the
parts
list
designate
com-
ponents
which
have
special
characteristics
important
for
safety
and
should
be
replaced
only
with
types
identical
to
those
in
the
original
circuit
or
specified
im
the
parts
list.
The
mounting
position
of
replacements
is
to
be
identical
with
originals.
Before
replacing
any
of
these
components,
read
carefully
3.
Do
not
degrade
the
safety
of
the
receiver
through
improper
servicing.
U102
BACK-T
AV
BOARD
the PRODUCT SAFETY NOTICE on page
PR SS
‘2530-00
10
Qz04
25C2712¥
Lzog =: RZI2. R225
> PL-27 470
6 OO "
OBSERVATION
OF
VOLTAGES
AND
WAVEFORMS
1.
Voltages
read
with
VTVM
from
point
shown
to
chassis
ground,
line
voltage
220
volts,
colour
bar
signal.
Voltages
reading
may
vary
+20%.
2.
All
waveforms
are
taken
using
a
wide
band
oscilloscope
and
a
low
Capacity
probe.
3.
Waveforms
are
taken
using
a
standard
colour
bar
signal.
4.
Make
sure
that
CONTRAST
and
COLOUR
controls
are
in
mid
position
and
BRIGHTNESS
control
is
almost
in
maximum
position.
Set
other
controls
for
best
picture.
sy.
N)
cL)
232 £ R223
12 #820
100
‘oND
% 8
NOTES:
1.
D.C.
resistance
value
of
a
principal
transf
gram.’
These
are
measured
for
separated
fr
2,
The
circuits
are
subject
to*change
without
3. S : Solder links.
GND NO. FOR AUDIO
Hy t108
pp 1107
KEbben et
[al EES | |
Lag ET
ecto
1000
877 L643
W98R ix 1000 Temzos 85
Wek x” FES NEtibony SSP
Pons
OP PUSH TER
B SEP Ssap-00