Table of Contents
Advertisement
Procedure:
1.
Connect
monitor
2.
Set TV-CAMERA
Select switch to TV.
3.
Play 'back the video alignment tape. (If video
alignment
tape is not available, record a test
pattern and make a prerecorded tape to be
used asa video aligriment tape.)
4.
Adjust
R315
and R337
for minimum
carrier
leak.
5-7.
MONITOR
LEVEL ADJUSTMENT
Test Point:
TP-304
Adjust for:
1 V(p-p)
Adjustment:
R116
Signal source:
Telecast signal
Equipment
Required:
1.
Monitor
Procedure:
1.
Set up record mode using telecast signal.
3.
Reconnect scope to TP-304.
4.
Adjust R116 for 1V(p-p).
5-8.
RECORD
CURRENT
ADJUSTMENT.
Test Point:
TP-301
Adjust for:
Maximum
rf output
in pb
mode
Adjustment:
R201
Signal source:
Test pattern
Equipment Required:
1.
Oscilloscope
2.
Video
camera AVC-3420CE
3.
Earphone
Procedure:
1.
Connect video camera, and thread a blank tape.
2.
Connect
the scope to TP-104.
3.
Set up the record mode using a video camera,
microphone
and test pattern.
4.
Adjust R201
to obtain 2.0V(p-p) and call out
the voltage reading into the microphone.
5.
Adjust
R201
clockwise slowly while observing
the scope.
Set the recording level to each of
the following values.
3.0V
3.5V
40V
45V
50V
55V
60V
At each increment, call out the voltage reading
into the microphone.
6.
Rewind the tape.
7.
Connect
an
earphone
to the
earphone jack.
8.
Connect
the scope to TP-301.
9.
Play back
the tape.
Note
the voltage level
(as indicated by the voice recording) at which
output is greatest.
10.
Reconnect
the scope to TP-104.
11.
Set up the record mode again.
12.
Adjust
R201
for the reading that gave maxi-
mum output indication during playback.
5-9.
PLAYBACK
PREAMPLIFIER
FREQUENCY
RESPONSE
ADJUSTMENT
Test Point:
TP-301
Adjust for:
Correct
frequency
response
Signal
source:
R304, L301
Video alignment tape
Equipment Required:
1.
Oscilloscope
2.
Video alignment tape
Procedure:
1.
Connect scope to TP-301. Scope controls should
be as follows:
Horizontal timebase:
2ms/cm
Vertical deflection:
0.2 V/cm
2.
Syne the scope externally from TP-708.
3.
Play back the rf sweep portion
of the video
alignment tape.
4.
Check to see that the sweep signal of Fig. 5-7
is obtained on the scope.
If the sweep signal
differs from Fig. 5-7, adjust as follows:
5-4
|
|
|
i
1
Advertisement
Table of Contents
