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TCL OVERSEAS HOLDINGS LIMITED Service Manual39
PART V. Adjusting Description
Flowchart chart of alignment procedure for M28 chassis:
B+ NICAM Electrical properties RF AGC
adjustment Adjustment checking for chassis adjustment
Sub-brightnes White balance Adjustment of screen Sub-color & Sub-tint
s Adjustment Adjustment Aging voltage and focus adjustment
Pincushion and screen Screen center & size Screen center & size QC
width adjustment adjustment (PAL) adjustment (NTSC) Checking
ALIGNMENT PROCEDURE FOR M28 CHASSIS:
I) Adjustment of +B Voltage
1. Apply 110-240VAC( 5V) to mains power input, and Philips standard testing pattern to RF
input.
2. Adjust VR830 in STANDARD mode until voltage at (B+) is 112V 0.25V.
II) NICAM Adjustment (for NICAM model only)
1. Apply a 38.9MHz color bar with NICAM signal to the IF input.
2. Monitor the DC voltage at pin 15 of IC1101.
3. Adjust T1101 until the voltage at pin 15 of IC1101 becomes 2.5 +/- 0.1V.
4. Then check the waveform at pin 4 and 6 of P1103 and it must show correct audio signal.
III) The alignment of RFAGC (choose A or B)
A)
1. Connect the detector shown below to collector of Q101.
2. Receive a grey scale signal with 70dB V amplitude.
3. Adjust RFAGC item until the output of the detector becomes 0.8Vpp
B)
1. Receive a grey scale signal with 60dB V amplitude.
2. Adjust RFAGC data until the noise of the picture just disappear.
IV) Adjustment of Sub-contrast, Sub-tint and Sub-colour for NSTC and PAL signal.
1. Enter D-mode, and connect the probe of Oscilloscope to the conjunction between R201 and P201
(B-out).
40 Service Manual TCL OVERSEAS HOLDINGS LIMITED
2. Apply the Grey-scale/Colour-bar (NTSC signal) to the AV input, in STANDARD status.
3. Select CNTC to adjust the sub-contrast, until that the amplitude "A" is 2.2VP-P as shown below.
4. Select COLC to adjust the sub-colour by tuning the amplitude of "a" and "d" to the same.
5. Select TNTC to adjust the sub-tint by tuning the amplitude of "b" and "c" to the same.
6. Apply the Grey-scale/Colour-bar (PAL signal) to the AV input, in STANDARD status.
7. Select COLP to adjust the sub-colour by tuning the amplitude of "a", "b", "c" and "d" to the
same.
V) Adjustment of Focus, Screen Voltage and Sub-brightness
1. Receive a crosshatch pattern.
2. Adjust the "FOCUS" VR on the flyback to make the picture clear.
3. Enter D-mode and press "MUTE" key and the screen will become a horizontal line. Then adjust
the "SCREEN" VR on the flyback transformer to set the intensity of the line to a minimum visible
level (the line can just be seen).
4. Press "MUTE" key again and the TV will become full raster.
5. Select BRTC to adjust the sub-brightness, until that the 2nd dark bar of 8 level grey scales just
can be seen.
VI) Adjustment of White balance
1. Receive a black and white pattern at STANDARD status.
2. Use a color analyzer to measure the black side of the screen. By changing the value of GB and
BB, set the reading of the color analyzer to x=284, y=299.
3. Then measure the white side of the screen. By changing the value of GD and BD, set the reading
of the color analyzer to x=284, y=299.
4. Repeat step 2&3 until you can get the correct reading for both black and white sides.
VII) Adjustment of Pincushion and Picture Width (for pure flat model only)
1. Receive a crosshatch pattern.
2. Adjust VR1024 until the vertical line become straight.
3. Adjust VR1023 for horizontal size.
VIII) Adjustment of Picture Geometry (PAL)
1. Apply the crosshatch pattern (PAL signal) to the RF input, in STANDARD status.
TCL OVERSEAS HOLDINGS LIMITED Service Manual41
2. Select HPOS to adjust the Horizontal center.
3. Select VP50 to adjust the Vertical center.
4. Select HIT to adjust the Vertical amplitude.
5. Select VLIN to adjust the vertical linearity.
6. Select VSC to adjust the vertical S-correction.
IX) Adjustment of Picture Geometry (NTSC)
1. Apply the crosshatch pattern (NTSC signal) to the RF input, in STANDARD status.
2. Select HPS to adjust the Horizontal center.
3. Select VP60 to adjust the Vertical center.
4. Select HITS to adjust the Vertical amplitude.
5. Select VLIS to adjust the vertical linearity.
6. Select VSS to adjust the vertical S-correction.
X) Adjustment of OSD position
1. Enter D-mode and press key "NOTE".
2. Select OSD1 to adjust OSD horizontal position (volumebar picturebar half blue panel OSD ).
3. Select OSDF1 to adjust OSD PLL DATA (volumebar picturebar half blue panel OSD ).
4. Select OSD2 to adjust OSD horizontal position except OSD1 items.
5. Select OSDF2 to adjust OSD PLL DATA except OSDF1 items.
XI) D-mode
Enter D-mode by press D-mode key, then you can adjust the setting according CPU specification.
System setting of M28
ITEM Description Initial
GROUP1 KEY 0
RB R CUT OFF 80
GB G CUT OFF 80
BB B CUT OFF 80
GD G DRIVE 40
BD B DRIVE 40
GROUP2 KEY 1
HPOS/ Horizontal Position 50HZ 0D
HPS Horizontal Position 60HZ 10
HIT/ Hight 50Hz 29
HTTS Hight 60Hz 26
VP50 Vertical Position 50Hz 05
VP60 Vertical Position 60Hz 01
VLIN V Linearity 50Hz 07
VLIS V Linearity 60Hz 07
VSC VS Correction 50Hz 03
VSS VS Correction 60Hz 00
42 Service Manual TCL OVERSEAS HOLDINGS LIMITED
VBLK V BLK Start / Stop 00
VCEN V CENTERING 16
OSDH OSD vertical position 50HZ 25
OSDHS OSD vertical position 60HZ 1F
GROUP 3 KEY 3
CNTX CONTRAST MAX. 59
CNTN CONTRAST MIN. 08
BRTX BRIGHT MAX.(difference from center) 20
BRTN BRIGHT MIN.(difference from center) 25
COLX COLOR MAX.(difference from center) 4F
COLN COLOR MIN. 00
TNTX TINT MAX.(difference from center) 28
TNTN TINT MIN.(difference from center) 28
GROUP 4 KEY 4
BRTC BRIGHT CENTER 50
COLC COLOR CENTER NTSC 4F
COLS COLOR CENTER SECAM 40
COLP COLOR CENTER PAL(shift data from COLC) 00
SCOL SUB COLOR ( Cr input (#21) gain up) 04
SCNT SUB CONTRAST 0F
CNTC CONTRAST CENTER 40
TNTC TINT CENTER 40
GROUP 5 KEY 5
ST3 SHARP CENTER 3.58NTSC TV 20
SV3 SHARP CENTER 3.58NTSC VIDEO 20
ST4 SHARP CENTER OTHER TV 18
SV4 SHARP CENTER OTHER VIDEO 18
SVD SHARP CENTER DVD 19
ASSH ASYMMETRY-SHARPNESS 04
SHPX SHARP MAX.(difference from center) 1A
SHPN SHARP MIN.(difference from center) 1A
GROUP 6 KEY 6
OPT OPTION DATA C6
0 adjust mode 0: engineer 1:factory 0
1 0:normal 1: mute sound when no sync in TV 1
2 0:NORMAL 1: mute video during change channle 1
3 au gain 0:50khz 1: 25khz 0
4 when no sync 1: AFT 0: no AFT 0
5 AV change 1: mute 0: no mute sound 0
TCL OVERSEAS HOLDINGS LIMITED Service Manual43
6 1
7 standby state 0: high standby 1: low standby 1
FLG0 06
0 OVER MOD 0
1 N Buzz Cancel 1
2 1
3 SLO f0 shift 0
4 hotel mode TV mode enter 0
5 hotel mode AV mode enter 0
6 hotel mode 0
7 Vco readjust when position select 0:enable 1:disable 0
FLG1 34
0 0
1 Secam 0:disable 1:enable 0
2 LOGO 0:disable 1:enable 1
3 TINT por 0
4 PIF SELECT 01:45.75 MHZ 1
5 011 :38.9MHZ 1
6 100 :38MHZ 0
7 APC 1:AUTO 0:PRESET 0
STBY 1F
0 1
1 1
hd kill timer set *40us
2 1
3 1
4 when STBY.1 =1 ,after AC on 0: standby 1: power on 1
5 after AC power on, 1: ref STBY.1 0: last state 0
6 auto sleep function 0
7 0
MODE0 12
0 NICAM 0:DISABLE 1:ENABLE 0
1 English language select 1
2 Russia language select 0
3 vietnam language select 0
4 mute type 0: y mute 1: RGB mute 1
5 when mode0.7 = 1 ; preset sound system after ASM 0
6 00: BG 01 :I 10:DK 11: M 0
7 preset sound system after ASM 0:disable 1:enable 0
MODE1 D5
0 BG system enable 1
1 I system enable 0
2 DK system enable 0
3 M system enable 1
44 Service Manual TCL OVERSEAS HOLDINGS LIMITED
4 VIDEO2 enable 1
5 video3 enable 0
6 YUV enable 1
7 pos num select 0:238 1:100 1
MUTT standby -->wake time 00
STAT contrast up timer afer standy off 00
GROUP 7 KEY 7
RF AGC RF AGC 20
SBY SECAM B-Y BLACK ADJUST 08
SRY SECAM R-Y BLACK ADJUST 08
BRTS SUB BRIGHT shift data of BRTC 00
TXTS TEXT RGB CONTRAST MAX. 1F
RGCN TEXT RGB CONTRAST MIN. 00
SECD SECAM MODE 08
GROUP 9 KEY 8
V25 VOLUME 25 32
V50 VOLUME 50 4B
V100 VOLUME 100 64
GROUP 10 KEY 9
SVM SVM 00
PYNX Normal H.SYNC max 28
PYNN Normal H.SYNC min 18
PYXS Search H.SYNC max 22
PYNS Search H.SYNC min 1E
GROUP 11 KEY CALENDAR
CLTO TV mode & SOUND SYS != M 4B
CLTM TV mode & SOUND SYS = M 4C
CLVO VIDEO 4D
CLVD YUV MODE 48
CLTO CLTM CLVO CLVD bit setting
7 KILLER OFF
6 P/N ID
5 C GAMMA
4
NTSC-MATRIX
3
2
1 YDL
0
ABL ABL SETUP 27
TCL OVERSEAS HOLDINGS LIMITED Service Manual45
5 TB1254N RGB ABL 1
4 TB1254N WPS 0
3 0
2 1
ABL point setup
1 1
0 1
DCBS VIDEO DATA SETUP 33
0~3 Y GAMMA BLACK STRETCH 3
4~5 OSD LEVEL 3
DEF V AGC SELECT 01
0 V AGC reference, 0:depends on YC Vcc
1: Depends on integrated regulator
GROUP 14 KEY NOTE-BOOK
OSD 1 OSD Horizontal Position (volume bar, picture bar, half blue panel OSD) 0B
OSDF 1 OSD PLL DATA (volume bar, picture bar, half blue panel OSD) 55
OSD 2 OSD Horizontal Position except OSD1 items 48
OSDF 2 OSD PLL DATA except OSD1 items 75
HAFC 09
0 When nois.2=1 ; TV hafc gain
1 If nois.2=0 TV hafc gain depend on noise (0~1)
2
In video mode hafc gain
3
NOIS HAFC DATA 01
0
Noise det
1
2 Fix the hafc gain
UCOM MCU DATA 00
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