Sharp XV-Z1A Service Manual page 24

XV-Z1E/A
Step
Adjustment Position
14 Reference level
(DAC)
15 Gain
(DAC)
16 BRIGHT
(DAC)
Adjustment Conditions
1. Receive the 10 step gray
scale signal of NTSC.
2. Connect the oscilloscope to
pin (2) of P4303.
3. Push S2001 and set the fol-
low DAC mode.
Group : VIDEO 2
Subject : SUB-BIAS
4. Connect the oscilloscope to
pin (1) of P4303.
Subject : R-BIAS
5. Connect the oscilloscope to
pin (3) of P4303.
Subject : B-BIAS
1. Receive the 10 step gray
scale signal of NTSC.
2. Connect the oscilloscope to
pin (2) of P4303.
3. Push S2001 and set the fol-
low DAC mode.
Group : VIDEO 2
Subject : DRIVE 1
4. Cinnect the oscilloscope to
pin (1) of P4303.
Subject : R-DRIVE
5. Connect the oscilloscope to
pin (3) of P4303.
Subject : B-DRIVE
1. Receive the 10 step gray
scale signal of NTSC.
2. Connect the oscilloscope to
(2-BRIGHT)(1-R-BRT)(3-
B-BRT) of P4303.
3. Push S2001 and set the fol-
low DAC mode.
Group : VIDEO 1
Subject : BRIGHT(G)
: R-BRT
: B-BRT
Adjustment Method
» Using the Operation key switch
tween signal center and reference level.
DC 2.0 ±0.1Vp-p
(SUB-BIAS, R-BIAS, B-BIAS)
Reference
level
Signal center
» Using the Operation key switch
tween black and 100% white level.
1.4 ±0.05Vp-p
(DRIVE1, R-DRIVE, B-DRIVE)
» Using the Operation key switch
tween signal center and 100% white level.
2.55 ±0.1Vp-p
Signal center
24
' " , adjust level be-
' " , adjust level be-
' " , adjust level be-