Sony TRINITRON PVM-1271Q Service Manual page 7

PVM-1271Q
1-4. FUNCTION OF CONTROLS
FRONT PANEL
O SECAM button
Press this button when a picture from SECAM color sources
is distorted. The picture wiil become clear.
O SYNC select switch
Sync may be supplied from an external sync generator to
the EXT SYNC IN connector on the rear PANEL. When an ex¬
ternal sync is supplied, with either a composite or non¬
composite video input, set the SYNC select switch to EXT.
When composite video is supplied with no external sync, set
the SYNC select switch to INT.
O AFC (automatic frequency control) switch
Select the AFC operation in the fast mode or slow mode.
FAST: incoming sync timing errors are compensated for.
Normally, set this switch to this position.
SLOW: incoming sync timing errors are displayed on the
screen.
This mode is used to monitor the jitter from a
VTR.
O SCAN MODE select switch
Normal scanning or under scanning is achieved by proper
setting of the SCAN MODE select switch. Set to NORMAL
for normal scanning, or to UNDER for viewing a picture
which does not appear in normal scanning. Under scanning
reduces the display size by about 9%.
O V HOLD (vertical hold) control
If the picture rolls vertically, correct it with this control.
O VOLUME control
Turn this control clockwise or counterclockwise to obtain
the desired volume.
O HUE control
This control is effective only for playing tapes of the NTSC
or NTSC443 system. Use to obtain the most natural skin
tones. Clockwise rotation makes the skin tones more
greenish; counterclockwise rotation makes them more
purplish.
O COLOR control
Adjusts the color intensity of the picture. Clockwise rotation
makes the picture more vivid; counterclockwise rotation
makes it paler.
O BRIGHT (brightness) control
Adjusts the brightness. Normally set this control at the
center detent position.
© PICTURE control
Adjusts the contrast, color intensity and brightness
simultaneously in the proper ratio.
© POWER switch and indicator
To turn the monitor on, depress the POWER switch. The in¬
dicator will light. To turn the monitor off, press the switch
again.
© Input indicators
Illuminate to indicate the input select button pressed.
© Input select buttons
Press to select the program to be monitored.
LINE A: for a signal from the LINE A connectors.
LINE B: for a signal from the LINE B connectors.
VTR: for a signal from the 8-pin VTR connector.
RGB: for a signal from the R, G and B connectors.
CMPTR: for a signal from the 25-pin CMPTR connector.
© Color system indicators
Indicate the color system of the input video sLgnai.