Kenwood LZ-702IR Service Manual page 14

LZ-702IR
QQ
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γ Curve adjustment procedure
Adjustment Adjustment
item requirement
V_MUTE: H
BRIGHT: 128
q RGB_AM
GAMMA1: 255
PLITUDE
GAMMA2: 255
CONT-RGB2: 255
V_MUTE: L
GAMMA1: 255
w BRIGHT
GAMMA2: 255
CONT-RGB2: 255
V_MUTE: L
e GAMMA1
GAMMA2: 255
CONT-RGB2: 255
GAMMA2: 255
r CONT-RGB2
V_MUTE: L
t GAMMA2
V_MUTE: L
y SUB-BRIGHT_R V_MUTE: L
TE
L 13942296513
u SUB-BRIGHT_B V_MUTE: L
COM_
i
V_MUTE: L
AMPLITUDE
∗
1
Make R smaller than G by 0.02V.
∗
2
Make B smaller than G by 0.02V.
PAL Demodulated axle adjustment (X35-)
This adjustment is done after auto adjustment is finished on
Gamma (Chroma_Auto)
Condition
Input signal: Color bar (PAL signal)
Remote controller operation method
: Final selection
DIRECT : End
7 : Adjustment item switching
8 : Adjustment value UP
0 : Adjustment value DOWN
www
Adjustment method
q Press Chroma Func key,in the test mode menu screen.
Color bars will be displayed on the screen.
.
w HD: Put the trigger with TP3. TP17 (VR) located close to
pin 33 of IC103 TP21 (VB) located closed to pin 35 of
14
ADJUSTMENT
Adjustment Adaptation
waveform value/STEP
Vrgba: 1.87V
LCD G (b-a)
step: 2
Vbri: 0.94V
(a+Vbri)
LCD G
step: 2
Vga1: 1.19V
LCD G (a+Vga1)
step: 3
Vcon2: 1.58V
LCD G (a+Vcon2)
step: 8
Vga2: 1.7V
LCD G (a+Vga2)
step: 8
Vsbr: 0.02V
LCD R ∗
1
(d+Vsbr)
step: 6
Vsbb: 0.02V
LCD B ∗
2 (d+Vsbb)
step: 6
Vcoma: 1.60V
VCOM IN (c+d)
step: 2
x ao u163
y
i
2 9
8
IC103 measure and adjust as shown below.
e First, monitor R-output, and change the TINT values to
adjust using [UP/Down] keys of remote controller. so that
oscillation width per each horizontal scanning period would
match. (Refer to Fig. 1 and Fig. 2)
∗ In Fig 1, the oscillation width of R-output and B-output
per horizontal scanning period is not matched. In Fig. 2,
the oscilliation width of R-output per horizontal scanning
period is matched.
r After adjusting, press the final selection key.
∗ After pressing the final selection key, the OSD in the up-
per left of the screen will change to purple.
t After R-output adjustment, press Adjustment Item switch
key, and switch the adjustment item to Phase. Monitor B-
output, and change the Phase value using [UP/Down] keys
of remote controller so that horizontal scanning period
would match. (Refer to Fig. 2 and Fig. 3)
∗ In Fig 2, oscillation width of B-output per horizontal scan-
ning period is not matched. In Fig. 3, oscillation width of
B-output per horizontal scanning period is matched.
y After adjusting, press the final selection key.
∗ After pressing the final selection key, the OSD in the up-
Q Q
3 6 7 1 3 1 5
per left of the screen will change to purple.
u Then, press End key. If "White_OK" is displayed, the ad-
justment is competed. When you press End key one more
time, it exits from Chroma_Func Adjustment.
Fig. 1 (Ch1) Color Bars
(Ch2) VB output measurement point, VR output mea-
surement point
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
Ch1: Input
signal
Ch2:
B output
Ch3:
R output
m
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