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4-5.
SCHEMATIC DIAGRAM
—DISPLAY SECTION—
(DISPLAY BOARD(1/4) J
aes
:
B.P,
B.P. F
BPE
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330Hz
1KHz
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1OkHz
B+
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O
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R978
R950
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9
1C905 pPC4s70Ha | 100
LCH
100k
35V,
1C904 *PC4S70HA
(172)
+4
0
+
:
(172)
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ais
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Note:
e
All capacitors are in wF unless otherwise
noted.
pF: uwuF
5OWV
or
less are
not
indicated
except
for electrolytics
and tantalums.
e
All
resistors
are
in Q and
'/,W or
less unless
otherwise
specified.
e
Voltage
and
waveforms
are
dc
with
respect
to ground
under no-signal
conditions.
no mark: PHONO
e@
Voltages are taken with a VOM
(Input Impedance
10M Q).
Voltage variations may
be noted due to normal produc-
tion tolerances:
FL901
FLUORESCENT
INDICATOR
TUBE
1
=
=2O-
Pee
Dy at
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