4
adjustment SUB-BRIGHT to let picture on the screen microbright.
4.5
receive white balance adjustment signal
enter PAGE3 of factory menu, press PP to select T1 picture mode, let the value of GD unchange, adjust
RD and B.D to let the white part of the picture appear “white”.
4.6
Use white balancer to rectify the white balance under following conditions
colour temperature:8MPCD
x =0.270± 0.008 Y=0.283±0.008 dark space : 4.5nit, bright space: 60nit
Note:
1. Check the white balance of bright field and dark field by receiving monochrome signal or
adjusting the degree of saturation to minimum under maintenance condition, adjust RGB BIAS in dark
field and RGB DRIVE in bright area, adjust bright/dark balance repeatedly until the bright and dark
field have no colour drift.
2. While the colour saturation changed from maximum to minimum, if the dark balance appears
changeable, adjust RY.DC.LVL and BY.DC.LVL (page3) to let it coincide with white balance.
3. If the dark balance appears changeable while connected with DVD, adjust YUV.BY.DC and
YUV.RY.DC (PAGE4) to let it conincide with white balance.
4.7 High voltage and filament voltage check
Connect a high-voltage meter between anode cap of picture tube and the ground, measure the filament
voltage using rms voltmeter, set the picture mode to “standard”, the high-voltage: 24.5KV±1KV of 21”,
22.5KV±1KV of 14”,filament voltage: 6.3±0.1Vrms.
4.8 x -ray protection check
Receive local TV signal, set the picture mode to “standard”, shorten the circuit and measure the
value of TP1-TP2, restart the TV 30 seconds after turn off the power source and it should return to
normal.
4.9
AV function check
according to the owner’s manual require, connect to the AV equipment and the AV interface:
VIDEO IN:
1 Vp-p 75OHM
AUDIO IN:
(-8±3)dBm>47 kOHM
S interface Y IN:
1 Vp-p 75OHM
C IN:
0.3 Vp-p 75OHM
DVD Y IN:
1 Vp-p 75OHM
Cr IN:
0.7 Vp-p 75OHM
Cb IN:
0.7 Vp-p 75OHM
4.10 AV parts check
incept to standard the TV signal:
a
）
AV and crossfire and allophone and shake ;
b
）
The user control function ana picture model
c
）
The remote control function check;
d
）
Color pure and converge check.
4.11 leave factory state setup
Picture model (PP)
STENDARD
language
All the country language
Color system
AUTO
C.CAPTION C1
CCD ON MUTE
OFF
RECEPTION AIR
AFT ON
Summary of Contents for TK2055D
Page 1: ...COLOR TELEVISION TS2049 TK2055D...
Page 11: ...9 IC BLOCK DIAGRAM LA76931...
