Panel
5203428504 V420H1-L11: Remote
control 6010Y05600 RC-Y56
Adjustments
(MAIN BOARD 6HK0200110)
Connect all the boards
according to wiring diagram, connect with power and observe the display.
Method for entering factory menu: press
“INPUT”,
“2”, “5”, ”8” and “0” in turn to enter factory menu; press “CH+” and “CH-” to select
adjustment items and press “VOL+” and “VOL-” to adjust value items, press
“MENU” continuously to exit.
Method for software upgrading: enter factory
menu and select “OPTION”, set ISP to 1 or insert jump wire J201, then you can
upgrade the software on line. After upgrade, it needs to set ISP back to 0 or
pull out jump wire J201. when software upgrade finish, turn off the TV and then turn on, enter the
factory menu and initialize the EEPROM (EEPROM-MEMORAY RECALL).
Initialization
The items are only for some units which have special demands. They do not need
to be adjusted for normal units.
Enter factory menu, select “OPTION” and “HOTEL OPTION” sub-menu.
Adjustment for AFT and
AGC of IF channel in TV
3.2.1
IF AFT adjustment
Turn on the TV then enter the factory menu, set IF VCO to 1, disconnect J601,
adjust L610 to value 2.5V of TP603 (A face), then wed J601.
3.2.2
IF AGC adjustment
Input 172.25MHz RF signal of 60dB to RF terminal, adjust RP601 to value 3.3V of
TP601 (A face) and there should be no obvious snowy picture. Increase the TV
signal to 90dBV and it should be no obvious noisy.
3.3
White balance adjustment
3.3.1
HDMI white balance adjustment
a. Input VG-848 signal to HDMI: TIMING854(800*600/60Hz) 8 level gray scale of
PAT920, adjust the balance with CA210.
b. Enter COLOR TEMP sub menu and select color temperature of standard (1000K),
the value of coordinate is commend.
c. Fixed B OFF, adjust R OFF, G OFF to let the color coordinate of the second
level be (280,290) (CPT panel) and the brightness be 2-10nit or so; Fixed B
GAIN, adjust R GAIN, G GAIN to let the color coordinate of the seventh level be
(280,290) (CPT panel). Repeat adjust R OFF, G OFF, R GAIN and G GAIN, until the
color coordinate of the two level gray scale be (280,290) (CPT panel).
3.3.2 VGA/YPbPr/ AV white balance check and correct a. Connect VG-848 signal of
VGA to VGA terminal and input TIMING854(800*600/60HZ) PATTERN921(16 gray
levels), enter ADC ADJ sub menu, select AUTOTUNE and wait for OK display. Input
PAT920(8 gray levels), check if the white balance is normal, if not, set ALL
COLOR to 0 and fine adjust according the method of 3.2.2.
b. connect VG-848 YPbPr signal to YPbPr terminal and input
TIMING972(1080I/60Hz) PAT908 color bar(include back/white bars), enter submenu
of ADC ADJ, select AUTOTUNE and wait for OK display. Input PAT920(8 gray
levels), check if the white balance is normal, if not, set ALL COLOR to 0 and
fine adjust according the method of 3.2.2
c. Input AV signal(PM5518, 8 gray levels, PAL for Chinese and NTSC for America)
to VIDEO 1 terminal, check if the white balance is normal, if not, set ALL
COLOR to 0 and fine adjust according the method of 3.2.2.
Note: it can’t set back to 1 once ALL COLOR changes to 0.
4 Performance check
4.1 TV function
Enter searching menu → auto search, connect RF-TV terminal with central signal
source and check if the picture is normal, if there are channels be skipped.
Check CCD and V-CHIP for America.
4.2 AV/S, YPbPr terminals
Input AV/S, YPbPr / YCbCr HD signal, check if it is normal.
4.3 VGA terminal
Insert VGA terminal, input VGA format signal of 640X480@60 Hz and check if the
display is normal.
4.4 HDMI terminal
Insert HDMI terminal, input 640X480@60Hz signal, check if the display is
normal. Check HDCP function.
4.5 check sound channel
Check the speaker and earphone of each channel.
4.6 RS232 terminal
Insert the earphone wire to COM port, check the long-distance control function
with special test software.
4.7 other function check
Check the turn on/turn off timer, asleep timer, picture/sound mode, OSD,
freeze/mute, stereo/SAP, magic picture, ect.
4.8 presetting before ex-factory.
The RF signal received by
antenna will be sent to tuner TUNER601, then IF signal will be obtained through
high amplified, mixed frequency. After pre-intermediate amplified by V602, it
will be sent to acoustic surface-wave Z602 to do IF filter and get better IF
characteristics, then it will be sent to N602 (R2S40401) to do intermediate
amplification, phase-lock loop VCO and synchronous wave detection to get the
composite video signal TV-CVBS; after pre-intermediate amplification IF will
also be sent to acoustic surface-wave Z601 to do filter at the same time, the
it will be sent to N602 to do intermediate amplification and output the second
sound intermediate frequency signal TV-SIF.
The TV-CVBS and TV-SIF signal will be sent to main IC N304 (MST9U89). Video
signal of AV1, AV2, S-VIDEO, YPbPr1 and YPbPr2 will also be sent to MST9U89,
their audio signal via audio switch N207 (HEF4052BT) selection to MST9U89 (AV1
and S-VIDEO share the same audio jacks).
HDMI1, HDMI2 and HDMI3 via HDMI switch N504 (TMDS351) selection, then sent to
MST9U89 together with VGA.
The main IC N304(MST9U89) is a high performance and fully integrated IC, which
can realize HDMI interface processing, video decoding, video switch selection,
A/D and D/A conversion, interlace/de-interlace processing, modes conversion,
OSD and low-voltage differential output, ect.
And it also has functions of audio selection, processing and MCU.
The video signal via MST9U89 processing, output 4 pairs differential signal and
1 pair clock signal for LCD panel display.
The audio signal via MST9U89 processing, it will be sent to N206 (BH3547F)
amplifying to earphone. The audio signal will also sent to sound amplifier N203
(TPA3120) amplifying to speaker.
