White Balance - Sharp XV-310P Serviceanleitung

Adjustment position
6 Sub-bias: RI 608
(Blue)
7

White balance:

RI 629 (B output)
White balance:
RI 623 (R output)
Adjustment condition
Receive the NTSC colour bar signal.
l
Connect the oscilloscope between
l
TP1603 and GND.
Receive the NTSC monoscope
l
pattern signal.
Connect the oscilloscope' s CHI to
l
Connect the oscilloscope' s CH2 to
l
TP1603 (B output) and invert the
waveform.
Receive the NTSC monoscope
l
pattern signal.
Connect the oscilloscope' s CHI to
l
Connect the oscilloscope' s CH2 to
l
AL colour bar signal.
Connect the oscilloscope between
l
Connect the oscilloscope between
l
Adjustment method
Turn RI608 so that the DC level at
TP1603 be the same as that at
DC level at TPI 602 5 0.1 V
O b s e r v e t h e CHI a n d C H 2
waveforms in the ADD mode.
A d j u s t R I 6 2 9 s o t h a t t h e
amplitude be minimum.
O b s e r v e t h e CHI a n d C H 2
waveforms in the ADD mode.
A d j u s t R I 6 2 3 s o t h a t t h e
amplitude be minimum.
Turn T402 so that the chroma
carrier level be minimum.
Chroma carrier lew
to be minimum
carrier level be minimum.
Chroma carrier levc
to be minimum