LG Flatron L1510SF – 15 inch LCD monitor – Schematic (Circuit Diagram) - Adjustments
LG L1510 - 15 inch LCD monitor - Circuit Daigram - Adjustments - Circuit descriptions
Type : TFT XGA LCD ModuleSize : 352.0(H) x 263.5(V) x 14.0(T)
Pixel Pitch : 0.297mm x 0.297mm
Color Depth : 6bits(with FRC)/ 16M colors
Active Video Area : 15.0inch (304.128 x 228.096)
Lamp Life : 40,000 Hours (Min.)
Horizontal : 30 ~ 63kHz
Vertical : 56 ~ 75Hz
Scaler
One chip IC(GMZAN-2, U201)
GMZAN-2 (U201) is one chip IC which it supports four internal function blocks of Video Amp, PLL, A/D converter and Video processor. Video signal (0.7Vp.p) clamped through C207, 208, 209 with matching IC’s proper cut off voltage. This signal is processed as a proper 8 bit digital signal by U201’s amplifying, phase locking, A/D converting, and scaling operations. U201 outputs 24bit RGB data and control signals(Clock, Horizontal and Vertical sync, and Data Enable) as LVDS IC’s input signals.
GMZAN-2 (U201) is one chip IC which it supports four internal function blocks of Video Amp, PLL, A/D converter and Video processor. Video signal (0.7Vp.p) clamped through C207, 208, 209 with matching IC’s proper cut off voltage. This signal is processed as a proper 8 bit digital signal by U201’s amplifying, phase locking, A/D converting, and scaling operations. U201 outputs 24bit RGB data and control signals(Clock, Horizontal and Vertical sync, and Data Enable) as LVDS IC’s input signals.
System
Controller (Microprocessor) Circuit
1) Microprocessor (U501) distinguishes polarity and frequency by calculating horizontal and vertical sync input from signal source.
2) Microprocessor (U501) carries out power control by sending power-down trigger signal to each IC.
3) Microprocessor (U501) communicates with EEPROM (U502), and GMZAN-2 (U201) through IIC(2 lines) or 4 bit bus line. It makes all devices operated properly.
4) Microprocessor (U501) let User adjust screen by OSD function.
LVDS(Low
Voltage Differential Signal, U411)1) Microprocessor (U501) distinguishes polarity and frequency by calculating horizontal and vertical sync input from signal source.
2) Microprocessor (U501) carries out power control by sending power-down trigger signal to each IC.
3) Microprocessor (U501) communicates with EEPROM (U502), and GMZAN-2 (U201) through IIC(2 lines) or 4 bit bus line. It makes all devices operated properly.
4) Microprocessor (U501) let User adjust screen by OSD function.
LVDS transmitter (U411) delivers digital signal to the receiver inside LCD
module by method of abstraction. The
abstracted signals are pairs of RIN0+-, RIN1+-, RIN2+-, RIN3+-, and RCLKIN+- of
which voltage swing is 0.5V each. When
SHUTON pin’s input is High, transmitter goes to power down mode.
Click on the pictures to zoom in
DC/DC
block
This block is composed of regulators which supplies 2.5V and 3.3V. Each regulator’s source power is 5VR from LIPS(LCD Inverter and Power Supply) block. U806 supplies 2.5VD and 2.5VA and U802 supplies 3.3VD, 3.3V_AD, and 3.3V_PL powers to GMZAN-2’s internal PLL, ADC, Pre-amp, and scaler by dropping down 5VR. U805 supplies MODPWR-3.3V for LCD module’s operation by dropping down 5VR.
This block is composed of regulators which supplies 2.5V and 3.3V. Each regulator’s source power is 5VR from LIPS(LCD Inverter and Power Supply) block. U806 supplies 2.5VD and 2.5VA and U802 supplies 3.3VD, 3.3V_AD, and 3.3V_PL powers to GMZAN-2’s internal PLL, ADC, Pre-amp, and scaler by dropping down 5VR. U805 supplies MODPWR-3.3V for LCD module’s operation by dropping down 5VR.
LIPS
Block (LCD Inverter and Power Supply)
This block supplies DC voltages of 5VS to interface board and 12V to inverter by converting AC input voltage of 100~240Vac. Converting method is SMPS(Switching Mode Power Supply). Inverter on/off signal from microprocessor makes inverter turned on or off . DIMADJ signal from microprocessor does inverter’s current adjustment for Brightness control.
This block supplies DC voltages of 5VS to interface board and 12V to inverter by converting AC input voltage of 100~240Vac. Converting method is SMPS(Switching Mode Power Supply). Inverter on/off signal from microprocessor makes inverter turned on or off . DIMADJ signal from microprocessor does inverter’s current adjustment for Brightness control.
Adjustment
for Factory Preset Mode
1) Run alignment program for L1510SFK on the IBM compatible PC.
2) Select EEPROM All Init. command and Enter.
3) Display cross hatch pattern at Mode 1.
4) Select EDID WRITE command and Enter.
1) Run alignment program for L1510SFK on the IBM compatible PC.
2) Select EEPROM All Init. command and Enter.
3) Display cross hatch pattern at Mode 1.
4) Select EDID WRITE command and Enter.
Adjustment for White Balance
1) Display color 0,0 pattern at Mode 13.
2) Set External Bright to MAX position and Contrast to MAX Position.
3) Select PRESET START → BIAS CAL command and Enter.
4) No attempt to manually adjust, BIAS data is automatically adjusted and saved to the EEPROM.
5) Display color 15,0 pattern at Mode 13.
6) Select DRIVE CAL command and Enter.
7) Color 1 (9300K) and Color 2 (6500K) are automatically adjusted and saved to the EEPROM.
8) Select PRESET EXIT command and Enter.