SCHNEIDER 30M901-LCD Monitor TV – LCD26S series – alignment procedure – how to enter service mode

Alignment Procedure
The panel in this model is LG PHILIPS 30’ LC300W01 A3P6, whose max-luminance is at 450 cd/m2. Analog parts adopt VCT3834A with Teletext function, inner multi-system Comb-filter, MCU and TCU for Teletext, extra 4M Flash EEPROM and 4M SRAM Teletext EEPROM. IF Amplifier adopts
TDA9886T Multi-system PLL IC, MSP3411G for Nicam, and FS European Frequency which supports PAL DK BG I, SECAM BG/DK, SECAM L system.
Digital parts adopts

SAGE Project, Scaler chip which supports VGA/DVI input in main chassis part. 

TV input channel adopts 

AD9883A+FLi2200 to support A/D switches and De-interlace Progressive processing. Scalar output adopts

 LVDS switch IC SN75LVDS83, which will switch LVDS to PANEL CN1 Socket.

INVERTER comprises by two groups +24V power suppliers and signal switching controller.

ALIGNMENT INSTRUCTION:
1. Adjustment of Analog Chassis Parts
In 30 inch LCD TV, Analog Chassis Parts are comprised of three main boards:
A. Main-signal Processing Board, which is including Video, Audio, Code, and Teletext process of sub-signal, Board named: 40-3026WS-MA* (* =A. B. C. D. …..)
B. IF Amplifier Board, named: 40-LS3026-TU* (* =A. B. C. D. …..)
C. Power Amplifier Board, named: 40-3026WS-AM* (* =A. B. C. D. …..)
Checking of IF Amplifier Board
Procedures
1) Connecting IF Amplifier Board (without shield cover) to P602 in Switching Board via VGA；
2) Switching on the Displayer, + 3V red light will be on in RC receiving board. Press “Standby” in RC, the red light will be off. Applying Factory Signal to see whether the sound, Nicam, and searching channel are OK；
3) Pressing“i”key in RC to enter into User Menu, pressing pin“6”“4”“0”“5”keys to Factory Menu (service mode) , and select AGC Menu. Setting switching mode to NORMAL, AGC to 14, pressing “EXIT” to exit.
4) Switching off the Displayer. Taking out IF Amplifier, and soldering shield cover.
Checking of Analog Main Board
Procedures
1)Inserting P1, P2, P14 in Digital Board to P1001, P1002 and P5540 in Analog Board
2) Connecting Computer to S5504 via COM connector, turning off the reset switch in the connector
3) A. Setting PC mode in Digital Board;
B. Switching on the unit with RC;
C. After Screen is on, running FLASH PROGRAM for 2 seconds in Computer Communication Program;
D. Turning on the reset switch in the connector, then carrying out the program to burn
4) After burned, please take out the S5504 connector
5) Switching off Reset power on with RC, pressing “0” key and “OK” key to enter TV mode, the Noise Signal will be displayed, press “i” in RC to enter into User Menu, and setting OSD
to ENGLISH or other languages
6) Making an elementary setting in PICTURE menu:
Brightness ---- 50, Contrast ---- 70, Color ---- 40, Tint ----10
7) Pressing “OK” to save and “exit”；
8) Pressing “i” and “CH-” to select and “CH+” to enter into PROGRAM menu, pressing “CH-”to select “SEARCH >”, and pressing “VOL +” to searching channels. Press EXIT to exit when finished
9) Checking all channels to see whether the sound and picture are OK or not. Signal should be switched after applying SCART signal. Input and output function should be checked in SCART 1 & SCART 2. There is not output function in SCART 3. (“0” key in RC to open menu, “V” key to OK)

Digital Board, turning on the main power switch to electrify CPU (3.3V) in Digital Board;

3) A. Switching on the Unit using RC;

B. Electrifying Analog Board with 12V, +5V to IC JACASM in Digital Board simultaneously;

C. After several seconds, sound and picture will be OK. (TV mode is in normal mode without SCART Signal)

4) Applying TV signal (Gray Scale and Color Bar Signal), pressing “0”, “6”, “4”, “0”, “5” in RC, the AD9883 menu will be displayed, please setting the data as following:

R 97

G 98

B 98

BRIG 183

CON 50

Pressing“EXIT” to exit

5) 1 Applying VGA signal, press “0” in RC to choose PC mode and pressing “OK” to confirm. Switching to VGA mode and selecting VGA to Gray 16 Scales.

2 Pressing “0”, “6”, “4”, “0”, “5” in RC to enter into Factory Mode, setting the data as below:

JAGASM of VGA:

R 93

G 103

B 98

BRIG 183

CON 50

Adjustment of Digital Board

Procedures：

1) A. Inserting P1 (8pins) in Digital Board to P1001 in Analog Main Board;

B. Connecting P14 in Digital Board to P5540 in Analog Main Board via 10Pins Line;

C. Connecting P24 in Digital Board to P1004 in Analog Main Board via line;

D. Inserting INVERTER switch Plug to P7 (Pin 3-5);

E. Connecting P2 in Digital Board to P1002 in Analog Main Board via line;

2) Inserting DC Plug in Extra Power Supplier to P18 in 

Pressing“EXIT” to exit；

3 Pressing “i” in RC to enter into the User menu to setting the following items when applying VGA signal:

Pressing “OK” to save and“EXIT” to exit；

* Note: Best Resolution： 1024X768 60Hz mode.

6) DVI checking

Procedures

1 Inserting DVI plug into P10 in Digital Board；

2 Pressing “0” in RC to enter into signal menu, pressing “CH+/CH-” to choose “DVI” and “OK” to enter into DVI mode

3 Applying the kinds of testing signal, whether they all can be identified and the output are normal in DVI signal sources；

4 Entering into main signal menu and setting into the “TV” mode；

5 Taking out DVI plug and shutting off AC power supply.

Adjustment of Complete LCD TV

Procedures：

 Adjustment of AGC

1 Power on the Unit and applying the TV signal sources.

TV signal sources setting as below

f=48.25MHz

System: PAL B/G

Signal： Full color bar

Intension： 65dB；

2 Pressing “i” key in RC to enter into User Menu, pressing pin “6”“4”“0”“5” keys to Factory Menu, pressing “<<” key to select item, “V+& V-” to adjust the data.

Setting AGC data to 14 to obtain the Noise of Screen Signal is at minimum.

DVSS: ON
3 Setting BURN IN at On
( Analog Board is on when no signal, Normal User mode is OFF)
LCD TV TCL Ver. 1.22B/13/10/2003 (Update irregularly)
Auto Format 4:3
Tuner AGC 14
Transparent OSD 66
DVSS ON
Burn-in Mode ON
Min.volume.1% 10
Sound curve.10% 64
Sound curve.20% 86
Sound curve.40% 105
Sound curve.80% 121
Sound curve.100% 127
4 Pressing“EXIT” to exit.

Adjustment of White Balance in VGA mode

1 Applying VGA signal, 1024 X 768 60Hz, switching signal source to PC mode,

9300K.

2 Choosing White Signal, using Color Temperature Instrument or White Balance

Instrument to test the color coordinate.

3 Pressing“0”, “6”, “4”, “0”, “5” key in RC to enter into Factory Mode, pressing “CH+,

CH-” to select item, “V+, V-” to adjust R、 G、 B data to obtain x=284+5，

Y==299+5；

4 7000K X=305+15， Y==320+15 (no use now)

5 7500K X=299+15， Y==315+15 (no use now)

AUTO Adjustment of User Setting in VGA mode

1 Applying Square Signal, pressing “i” key in RC to enter into User Menu.

2 Pressing “CH+, CH-” to select “AUTO” item, and “V+” to active the auto adjustment then screen will be dark instantly. If finished, screen will be OK automatically.

3 If auto adjustment lost or some disturb/noise in screen, please adjust PHASE by manual.

Applying signal modes：

640 X 480 (60, 72, 75, 85Hz)

720 X 400 (60, 70Hz)

800 X 600 (60, 75, 85Hz)

1024 X 768 (60, 75, 85Hz)

1280 X 1024 (60, 75, 85Hz)

To do the checking and auto adjustment separately when applying the kinds of signals, if no problem exists, it is unnecessary to adjust the data in EEPROM.

Adjustment of White Balance in TV mode.

1 Applying SCART White Signal, using White Balance Instrument to test.

2 Pressing “0”, “6”, “4”, “0”, “5” key in RC to enter into Factory Mode, pressing “CH+, CH-” to select item, “V+, V-” to adjust R G B data to obtain X=0.284,

Y=0.299, color temperature: 9300, Luminance> 400cd.

3 Pressing“EXIT” to exit.

Checking Complete LCD TV

1 Applying TV signal to check whether AGC can work normal.（40~100dB TV signal).

If AGC is abnormal, please do fine tuning.  (If overloading, lower AGC Value)

2 Applying SCART signal to check whether the input and output of SCART can work normal in R G B, Y/C, SCART, 16:9/4:3 mode.

3 Applying VGA signals to checking:

640 X 480 (60, 72, 75, 85Hz)

720 X 400 (60, 70Hz)

800 X 600 (60, 75, 85Hz)

1024 X 768 (60, 75, 85Hz)

1280 X 1024 (60, 75, 85Hz)

4 Checking PIP in TV Signal (VGA mode)
a. Pressing “0” to choose PC mode and“OK” to enter into VGA mode, applying VGA signal.
b. Pressing key in RC to active PIP function, pressing this key continuously to scale up the PIP picture and disappeared circularly , there are four scales.

c. Pressing “<< ” key to locate the PIP picture from Top-left, Top-right, Bottom-right, Bottom-left and center circularly.
d. Pressing key in RC to close the PIP when the picture is in largest scale.
e. Press Green Key in RC can switch the PIP signal source

5 Checking PIP in DVI mode
Pressing “0” to choose PC mode and“OK” to enter into DVI mode.
Repeat 4 to check PIP scale and location.
6 Safety Checking
a. AC 3000V; b. Resistance> 4MΩ
7 Default data setting:
Applying factory signal, setting the data to default when in best picture, best sound and so on