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DIDS-40Z-ZM10
Para 4-1.
5dl f
4-10
d.
Check the six input digital bits as follows:
DAXO
terminal
AC
DAXl
terminal
AA
DAX2
terminal
Y
DAYO
terminal
S
DAYl
terminal
P
DAY2
terminal'
N
If proper signals are present, replace monos cope XY deflection
amplifier A2 and align (paragraph 2-3.6).
If proper signals are
not present, check all leads to keyboard assembly All and check the
keyboard by substitution.
e.
If replacement of circuit board A3 does not resolve the difficulty,
those parts of the monoscope XY deflection circuit located on the
indicator chassis must be checked.
(1)
If the waveform at pin B is improper, check transistor OS,
resistor R5, and associated wiring {figure 2-1).
,
(2)
If the waveform at pin A is improper, check transistor 04,
resistor R4, and associated wiring (figure 2-1).
(3)
lithe waveform at pin
J
is improper, check transistor 06,
resistor R6, and associated wiring (figure 2-1) ..
(4)
If the waveform at pin K is improper, check transistor 07,
resistor R7, and associated wiring (figure 2-1).
f.
Check the waveforms at terminals AH and AK.
If waveforms are
present but not proper, check transistor 03 and wiring (figure 2-1),
then check the wiring to the deflection coil and the mino.r vertical
deflection winding on the coil.
If
no waveform is present .at terminal
AH, replace monoscope XY deflection amplifier A3.
If
A3 is re-
placed,' the replacement board may require alignment (paragraph
2- 3.6).
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