Sharp VL-C780S Serviceanleitung Seite 202

VL-C780S/H/X
VL-C7400E
VE-C690S/H/X
VL-CG400E
The white balance circuit is always AUTO. At adjsuting, by changing the pin (28) voltage of IC301, selection
of preset, adjustment and writing in EEPROM are performed.
Selected voltage (Pin NO.)
eee " [eee ll
1/4 Vcc or jess AUTO Time division of H~L | Time division of H~L
1/4 Vee ~1/2 Vee JM (3200°K adjustment)
1/2 Vee ~3/4 Vee |H (daylight colour temperature)
3200°K adjustment
After getting in the camera adjusting mode, set the pin (28) voltage at 1/4 Vcc - 1/2 Vec in a light source of
3200°K and select preset M.
In the camera adjusting mode, perform white balance adjustment with CH04 and CHO5 and write the
data in the EEPROM.
High colour temperature adjustment
After getting in the camera adjusting mode, set Her pin (28) voltage at 1/2 Vcc - 3/4 Vcc and select preset
H. Ina light source of 3200°K, using colour temperature conversion filter LB165, convert into high colour
temperature. In the camera adjusting mode, perform white balance adjustment with CH14 and CH15
and write the data in the E2PROM. _-
Auto offset adjustment
After getting in the camera adjusting mode, set the pin (28) voltage at 1/4 Vcc or less and select the auto
mode. Ina light source of 3200° K, make adjustment with CH12 and CH13 to-correct the offset of IC301
and write the datain the E2PROM.
As the white balance is always in ihe auto mode, set the pin (28) voltage at 1/4 Vec or less and write in the
E2PROM.
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