Tandy CM-4 - Waveforms

WAVEFORMS
Waveform Measurement
Conditions:
1
. The
voltage
level
and
waveform at each
point are
given below
on
120V
/AC power
when this
set is
connected to
a personal computer
with
a
video
sig-
nal input
at 0-volt
(namely,
with no brightness
on
the screen).
2.
O*
indicates
the
waveform
check points
(in the
chart,
waveforms are
measured
from
the
point in-
dicated to
chassis ground.)
®
6.0
Vp-p (H)
£
225
Vp-p (H)
®
900
Vp-p (H)
©
1
5
V
p
-
p
(H)
(D
4.2 Vp-p
(H)
m
®
12
Vp-p
(H)
(7)
31
Vp-p
(H)
(8)
3 5 Vp-p (V)
fflH
(9)
4.2
Vp-p
(V)
10 1.9 Vp-p (V)
il
2.0 Vp-p
(H)
SEMICONDUCTOR
LEAD
IDENTIFICATION
Q85I
Q50I
Q86I
Q502
0871
Q401
45
1
Q402
Q46I
0421
047(
Q422
0601
I
2SC 1826(G)
2SC2068
D
(LB)
Q40I ZSA 10
1
5(Y)
Q402
2SA854(Q)
0421
1
Q422
0451
}2SCI6I5(Y>
0461
0471
0601
2SCI2I3A(C)
51
n
J
0701
1
TOP
VIEW
IC48I
IC49I-IC494
® ®
IC60I HA)
1235
© ®
©O ®®
SIDE
VIEW
IC70I
T2058
®
ft
®
1C48I
H074LSI36P
1C49I SN74S04N
IC492 HD7406P
IC493
HD7 426P
IC494 SN74SMN
J
44