Technical data

150MT10P LMT
27
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Electrical instructions
PRESET VIDEO RESOLUTION
Equipment Requirements : Colour analyzer.
Input Signal Type : RF signal, modulated with white
Pattern
Input Signal Strength : >= 1mV rms (60 dBuV) terminal
voltage.
Input Injection Point : Aerial input
Initial Set-up : After PC White D adjust
Set color to original color
Set TV Brightness = 122 ; Contrast=64
in Factory mode(can be fine tuned)
Set smart picture to Natural ( Europe ,
AP model )
Set Color Temp to Normal
Select COLOR TEMP or 100% Full
White pattern by TV pattern generator
Method of Alignments :
Adjust TV R,G,B gain
Adjust TV red , green and blue to the
value in the table
Check the grey level color pool & noise
condition if need adjust, please adjust
TV Brightness and Contrast in Factory
mode. .
Measured Parameters : White balance.
Specifications : See table.
Units of Measurement : xy.
5.1.2 White balance adjustment (B)
A)
B)
C)
D)
GENERAL SET-UP
INPUT REQUIREMENTS
ALIGNMENT METHOD
EXPECTED RESULTS
E)TABLE(S)
5.2 VIDEO PROCESSING ( Conjunction board A10 alignment )
5.2.1 RF AGC take over point adjustment .
: Specifications of white balance
Picture Mode x y Brightness
Normal (Natural) 295+/- 5 315+/- 5 >230 nits
Table 5.1: Readings with Philips Colour Meter.
Input :Test land of item 7681 pin 11 connector through the probe.
Input signal:IF signal modulated with a Grey scale video signal ,
video modulation - negative & Sound IF signal
(33.4MHz / 31.5MHz / 41.25MHz for picture IF
frequencies of 38.9 MHz / 38MHz / 45.75MHz
respectively) ,level at 13dB w.r.t. picture IF level,
Without modulation ( only carrier).
Input Probe : Input via 50 coaxial cable terminated withRC
(120.10nF) network at I/P injection point.
Output : pin 1 of tuner connected to a DC voltmeter.
Set bimos : sub address 27, refer to table below.
Method :
Via I C or with a factory remote control, adjust the AGC take over
(data byte sub address 1E , D0-D5) to the step at which the DC.
voltage should be within 2.5 V AGC takeover voltage 4.6 V.
Record the AGC register content and store in the NVROM
location ' TOP ' , address as specified in the attached 'memory
layout' list.
Versions IF Frequency IF signal level Value of Sub
(MHz) (dBuV) address 27 of bimos
Europe model 38.9 105 40hex
2
5.2.2 Off-set IF demodulator Adjustment.
Input : Same as RF AGC adjustment.
Input Signal : Same as RF AGC adjustment , with picture IF
signal modulated with a cross-hatch video signal
instead of grey scale video signal & video level
105% .
Output : Sound decoder ( device add. 80H / 81H for
Write/Read ) Read register Quasi-peak readout
left ; Sub Add. 13H ; Reg. 0019H.
Set Sound decoder : 1. DSP write register : Prescale FM\AM ; Sub
Add.12H ; Reg. 000EH ; Data 7F00H.
2. DSP write register : Deemphasis FM ;
Sub Add.12H ; Reg. 000FH ; Data 3F00H.
3. DSP write register : Volume loudspeaker
channel ; Sub Add.12H ; Reg. 0000H ; Data 7F00H.
Method : Via I2C, adjust the ' Off-set IF demodulator ' ( data byte
sub address 05, D0-D5 ) register value of the bimos
so as to get the lowest read back value from the
sound decoder.
This value of the ' Off-set IF demodulator ' is to be stored
in the NVROM locations ' OFFSET_IF_NEG ' & '
OFFSET_IF_POS ' , address as specified in the
attached ' memory layout ' list.