Sharp VC-AA350A Service Manual page 29

ADJUSTMENT OF PAL SYSTEM FV (False
Vertical Sync) OF STILL PICTURE
Measuring Colour TV monitor
instrument
Mode Playback still
Cassette Self-recorded tape (SP/LP/EP
mode) (See Note below 1)
Control Tracking control buttons (]) or ([)
Specification No vertical jitter of picture
1. Play a cassette which was recorded by the unit in SP
mode.
2. Press the PAUSE/STILL button to freeze the picture.
3. Adjust (]) or ([) TRACKING buttons until the vertical
jitter of the picture minimized.
4. Play and freeze the self-recorded tape in SP mode and
make sure vertical jitter of the picture is not
noticeable.(For the LP/EP mode adjustment is the
same as at SP mode.)
Note:
1 Self-recorded tape is a cassette which program was
recorded by the unit being adjusted.
2 The tracking control is enabled with the (])/([) button.
ADJUSTMENT OF NTSC SYSTEM SP/EP
SLOW TRACKING PRESET
Measuring Colour TV monitor
instrument
Mode Playback
Cassette Self-recorded tape
(SP/EP mode)(See Note below)
Control Tracking control buttons (]) or ([)
Specification Minimized noise on
monitor screen
Note:
1 For model VC-AA350, VC-AA352W and VC-AA360,
the following adjustment shall be made for EP mode.
For SP mode ignore.
2 For model VC-AA370, the following adjustment shall
be made only for SP mode due to don't have EP
mode.
1. Have the unit to receive a good TV broadcast or feed a
video signal to the VIDEO IN jack. (See note 2 below)
2. Set the tape speed in SP mode by using the remote
control and record the signal on tape.
3. Rewind and play the tape where signal was recorded in
above step.
4. Press the SLOW button on the remote control, and
playback the recorded portion in the slow mode.
5. Make for a moment short-circuit TP801, located at the
front side on the main PWB.
Be sure that all the LCD display light up when press the
TEST mode.
6. Adjust the (]) or ([) TRACKING buttons until there is
minimum or no noise appear on the screen.
7. Press the STOP button to return to normal mode.
8. Play the tape a few seconds then press SLOW button
again and make sure there is minimum or no noise on
the screen.(For the E P mode adjustment is the same
as SP mode.)
Notes:
1 Self-recorded tape is a cassette which program was
recorded by the unit being adjusted.
2 The TV program will not be recoded if RCA or 21pin
plugs are playyed in the AUDIO/VIDEO input termi-
nals.
3 The tracking control is enabled with the (])/([)
button.
ADJUSTMENT OF NTSC SYSTEM FV (False
Vertical Sync) OF STILL PICTURE
Measuring Colour TV monitor
instrument
Mode Playback still
Cassette Self-recorded tape (SP/EP mode)
(See Note below 1)
Control Tracking control buttons (]) or ([)
Specification No vertical jitter of picture
1. Play a cassette which was recorded by the unit in SP
mode.
2. Press the PAUSE/STILL button to freeze the picture.
3. Adjust (]) or ([) TRACKING buttons until the vertical
jitter of the picture minimized.
4. Play and freeze the self-recorded tape in SP mode and
make sure vertical jitter of the picture is not
noticeable.(For the EP mode adjustment is the same as
SP mode.)
Note:
1 Self-recorded tape is a cassette which program was
recorded by the unit being adjusted.
2 The tracking control is enabled with the (])/([)
button.
29
VC-AA350A/L/M/W
VC-AA352W,AA360A,AA370A
VC-AA550A/L/W,AA560A,AA570A