Sharp SharpVision XG-3850E, Service Manual

Page: 43 / 116

XG-3850E
TROUBLE
SHOOTING
TABLE
(Continued)
No Color or No Specific (NTSC)
Select color density/tint mode with video select key. Use UP/DOWN key to see the
color.
Color density: About (DC) at
pins (45) and respe
of on main
No
No
Check and
Check and their
peripheral circuits.
Check pins (13) input),
(21) (chrome (45)
and (43) (color difference
output) of
Color density: Color density: PWM output at PWM output at
pin pin (11) of (11) of
Check ICI 209
and their peripheral
circuits on main PWB.
Check video select
key, DAC UP/DOWN
key and parts nearby.
Check microprocessor
and its
peripheral circuitson
main PWB.
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