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9) Check that the No. 3, 4 and 5 guides space and
curl satisfy the specifications.
;
Space: None for all three guides
Curl:
No. 3, 4 guides, less than Imm. None for
No. 5 guide.
1-5. Audio/CTL Position Adjustment
1) Audio Head Azimuth Adjustment
Refer to the section on "'Audio Head (ACE ass'y)
Azimuth
Adjustment"
in the
Service
Manual.
Connection of Equipment:
The
connections
of the
equipment
to the input/
output terminals are shown in Fig. 1-22.
audio oscillator
audio line input
audio line output
Fig. 1-22
Connections
(1) Terminate
the audio
line output terminal with
a 100kQQ resistor and connect
a VTVM.
(2) Play back the 5kHz signal segment of the align-
ment tape (KR5-1M).
(3) Adjust the azimuth adjustment screw on the audio
head
for
a maximum
VTVM
reading.
(See Fig.
1-22.)
Note:
Loosen
azimuth
adjustment
screw before
the
adjustment
and
tighten
it after the
completion.
2) CTL Position Adjustment
knob is at center click.
Adjustment" in the Service Manual.
Position Adjustment of ACE Assembly
If this sequence is reversed, poor tracking occurs.
(1) Connect
a dual-trace
oscilloscope
as follows.
CHE
he
ep
ea
eee
ate
ee RF OUT
CHE 228
ieee Gels Bae
Oe seed AUDIO OUT
Ext Trigger......... SWITCHING PULSE OUT
(2) Play back (BII mode) the 1MHz segment of align-
ment tape (KR5-1M) (See Fig. 1-23).
(3) Set the tracking
control
to the center detent
position and confirm
that the output waveform
level is maximum
and the 0 level point of.the
audio signal appears
at the Bch waveform
point
as shown in Fig. 1-23. If the specification is not
satisfied, perform the following Step 4.
Bch waveform point
CH-1
(RF output __] ach
Ach
waveform)
CH-2
(audio output _ VV
TV
waveform)
t
0 level
Fig. 1-23
Position Adjustment of ACE Assembly (1)
(4) Perform
the tracking
control
center adjustment.
(5) Set the TRACKING
control knob
to its center
detent point and play back
the
1MHz
segment
of the alignment tape (KR5-1M).
(6) Loosen
the
two
position
adjusting
screws
of
the ACE
head and adjust the cut-out section of
section
A for maximum
RF
output
waveform
and a 0 level of audio signal at the Bch waveform
point. (See Fig. 1-23.)
Note:
Perform
the adjustment so that the center
of the
cut-out
section
of the A section
will almost match the center of the round
hole.
(7),Play
back
the
1MHz
segment
of the alignment
tape and confirm the proper picture appearance.
(8) Tighten the position adjusting screw of the ACE
head.
72.
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