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CHECKING OF PLAYBACK LEVEL
Oscilloscope
Record/Playback
EIA colour bar (1.0Vp-p)
VIDEO OUT jack
0.95 + 0.1Vp-p
Measuring -
instrument
Mode
Input signal
Test point
Specification
—_,
. Be sure that E-E level has been correctly specificed.
2. Connect a 75 ohm terminating resistor to the VIDEO
OUT jack and connect an oscilloscope across this
terminating resistor.
(See Note below @.)
3. Feed acolour bar signal to the VIDEO IN jack and set
the unit in recording mode.
4. Play the colour bar portion of the recorded tape.
5, Make sure thatthe output signal amplitude is 1.0Vp-pas
shown in Figure 5-6.
Note:
@ Ifthe 75 ohmterminating resistor is missing, the signal
amplitude wil! be doubled.
@® Set the S.PICTURE switch turn off.
Figure 5-6,
35
ADJUSTMENT OF S.PICTURE
Measuring
DC voltmeter/Colour TV monito
instrument
Signal
monoscope (1.0Vp-p)
Specification
1. Connect a DC voltmeter to the test points TP401
(Sig.) ~ TP402 (GND).
2. Feed a colour bar or monoscope signal to the VIDEO
IN jack.
3. Set the S.PICTURE switch turn on.
4. Adjust R430 (S.PICTURE control) so that the DC
voltmeter reads specified value, and checking
of
make sure so that the nothing unusual on the play-
back monoscope screen.
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