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ADJUSTMENT OF FV(False Vertical sync)
OF STILL
PICTURE
Colour TV monitor
Measuring
instrument
Playback still
Mode
Self-recorded tape
Cassette
(See Note below (2))
Tracking control buttons (+) or (—)
Control
No vertical jitter of picture
Specification
1. Playacassette which wasrecorded bythe unitin SP
mode.
2. Press the PAUSE/STILL button to freeze the picture.
3. Look at the monitor screen and adjust (+) or (—)
TRACKING buttons so that the vertical jitter of the
pictureto be minimized.
4. Playandfreezethe self-recorded t apein SP mode
and make sure vertical jitter of the picture is not
noticeable.
Note:
O The FVgoesbackto theits initial s tatewhenthe unit
is putintothe systemcontrollerresetmodedueto
power failure, etc.
In this case, preset the FV once again.
@Self-recorded tape is a cassettewhoseprogramwas
recorded by the unit being adjusted.
WC CIRCUIT
ADJUSTMENT
CHECKING
OF VIDEO
Oscilloscope
Measuring
instrument
E-E or Record
Mode
ElA colour bar (1 .OVp-p)
Input signal
VIDEO OUT jack
Test point
0.95 ± O.IVp-p
Specification
Connect a 75 ohm terminating resistor to the VIDEO
1
OUT jack and connect an oscilloscope across this
terminating
resistor.
(See Note below.)
Feed a colour bar signal to the VIDEO IN jack.
2.
Make sure that the E-E signal amplitude is 1.OVp-p as
3.
shöwn in Figure 5-3.
Figure 5-3.
Notes:
If the 75 ohm terminating resistor is missing, the signal
amplitude will be doubled.
CHECKING
OF WHITE
Oscilloscope
Measuring
instrument
E-E or Record
Mode
ElA colour bar (1 .OVp-p)
Input signal
Pin(77) of
Test point
190 ± 5% (See note below)
Specification
1. Connect an oscilloscope to pin (77) of IC201 and
GND.
2. Feed the colour bar signal to the VIDEO IN jack and
set the unit in E-E or recording mode.
3. Make sure that the overshoot
clipped at 190% as shown in Figure 5-4.
Note:
From sync tip to white peak, the level is 100%.
The white clip level is 90% above the white level.
11
VC-M29GM/M49GM
VC-M26SM/M46SM
vc-M261SM/M461SM
E-E LEVEL
0.95 vp-p
CLIP LEVEL
, GND
of the video signal is
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