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DIDS -402 -2M] 0
Pa ra 4 - 1.
' 3 .s..!
4 - ] • 41
c.
Check the output sweep waveform at: ternlinal D.
If
improper, check
deflection yoke Ll (figure 2-3) resistance and compare
it
with that of
the spare yoke.
If
the deflection yoke is normal, replace amplifier
A2.
d.
Check the CRT protect at terminal Z.
If
the voltage is more than 1 V
and the sweep output is present in the previolls step, check the hori-
zontal deflection amplifier.
e.
If
the deflection anlplifier
is
replaced, the replacernent board nlUst
be aligned (paragraph 2-3.1).
B
Figure 4-2.
Vertical Deflection Amplifier A2 Waveforms
4-1. 4 Horizontal Deflection Amplifier A2 (figure 4-4)
a.
Check the dc voltages on the board (figure 4-1).
b.
Check the horizontal drive (pin K).
If it
is not present, the trouble is
not in the horizontal deflection amplifier.
Check the horizontal drive
output from display timing board A 14, pin 19 (figure 4-
3).
c.
Check the waveform at terminal W.
If there is no waveshape, replace
amplifier A2.
If the wave shape is present at terminal W but the
waveshape at terminal V is distorted, check Ql, Cl, Rl, and R2 and
as sociated wiring (figure 4-1).
Check deflection yoke Ll (figure 2-3)
resistance and compare with that of the spare.
d.
Check the waveform at terminal Y.
If
there is no waveshape, replace
amplifier A2.
If
the waveshape is present at terminal Y but the
waveshape at terminal V is distorted, check Q2, CRI and R3, and
associated wiring (figure 4-1).
4-5/4-6
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