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L9CMonitor
Service Manual for the Envision EN9410
Feb, 18th, 2005 Revision: 1A
Issued By: Checked By:
_____________________________________________________________________________ ____
The release of this document is under control by the company. Any extra copy of this document must be written permission by the product manager.
L9C service manual
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L9CMonitor _____________________________________________________________________________ ____
- Quanta Confidential History Page
Reversion 1A Date 2/18/2005 1
ST
Remark Released.
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Content
Chapter A. WARNING B. SAFETY PRECAUTIONS 1. DIMENSIONS 2. GENERAL INFORMATION 3. SPECIFICATIONS 4. THEORY OF OPERATION 5. CONTROL LOCATION 6. NECESSARY EQUIPMENT LIST 7. BLOCK DIAGRAM 8. CONDUCTOR VIEW 9. SCHEMATIC DIAGRAM 10. EXPLODED VIEW 11. TROUBLE SHOOTING HINTS 12. REPLACEMENT PARTS LIST 13. AUTO BALANCE Page 4 5 6 8 9 20 23 32 33 35 38 45 46 48 48
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WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt within this service information by anyone else could result in serious injury or death.
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SAFETY PRECAUTIONS
1. CAUTION: No modification of any circuit should be attempted. Service work should only be performed after you are thorough familiar with all of the following safety checks and servicing guide lines. 2. SAFETY CHECK Care should be taken while servicing this LCD display. Because the high voltage is used in the inverter circuit. These voltages are exposed in such areas as the associated transformer circuits. 3. POWER SUPPLY REQUIREMENTS The external power converter for this display utilizes AC and DC cords. AC cord is detachable, But DC cord is permanently attached. Any attempt to replace another adapter could result in serious problem on the display. 4. LEAKAGE CURRENT HOT CHECK 4-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check. 4-2 Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each metallic part and a good earth ground. 4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across the combination 1500 ohm resistor and 0.15uF capacitor. 4-4 Move the resistor connection to each exposed metallic part and measure the voltage. 4-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement. 4-6 Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the ground. A leakage current tester may be used in the above hot check, in which case any circuit measured must not exceed 1 milliamp. In the case of a measurement exceeding the 1 milliamp value, a rework is required to eliminate the chance of a shock hazard.
AC VOLTMETER
V
0.15u .
To Metal Parts
1500
10W
Earth Ground
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1. DIMENSIONS (Unit:mm)
1.1 Front View (ID1)
1.2 Top View
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1.3 Rear View
1.4 Side View
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2. GENERAL INFORMATION
2.1. OUTLINE
This monitor is 19" multi-scan color LCD display with the following features OSD (on screen display) control allows easy user adjustment . Power saving function, which helps saving energy, is also one of the highlights of this model.
2.2. FEATURES 2.2.1 Power Saving
Built in Power Saving function based on VESA-DMPS standard. Power energy shall be saved by controlling the circuit in accordance with power save signal from computer. 2.2.2 OSD (on screen display) function OSD ( 3 Languages ) function is excellent and new man-machine interface. Anyone is able to set up the picture as the like through OSD menu. 2.2.3 Self Test function Self Testing picture comes out by pushing any key in the case of no-connection with computer or power saving operation. This function shows if monitor is alive or not and can be used for self aging test. 2.2.4 Ergonomic design Low emission design to meet MPR II and TCO 2.2.5 Multi scan with digital technology 8 bit micro controller controls the circuit operation to meet with wide range signal of Fh=31~83 kHz and Fv= 56~75 Hz. So VGA720x400, VGA640x480, SVGA800x600,XGA 1024x768, SXGA 1280x1024 . 2.2.6 Factory preset The product has 32 memory mode in total ,15 modes are preset and 17 modes are user definable. 2.2.7 Fine dot pitch LCD panel with a fine dot pitch (Horizontal: 0.294 mm / Vertical: 0.294mm) 2.2.8 Superior display performance High contrast: 500: 1(Typical) High brightness: 250 cd / m2 (Typical) Wide view angle: 140/ 130degrees (H/V) 2.2.9 Special function VESA DDC2B (Display Data Channel) Compatible
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3. SPECIFICATION
3.1. Outline 3.1.1 Front Indication: POWER SW, LED (Green/Amber), UP, Down, LEFT, RIGHT, Set/Auto and MENU key are located on the front panel. 3.1.2 Video signal cable connector, and DC inlet are located on the backside cabinet. 3.1.3 OSD menu includes the following function. CONTRAST, BRIGHTNESS, H.POSITION, V.POSITION COLOR-TEMPERATURE, CLOCK, PHASE, LANGUAGE, VOLUME, POWER-ON-RECALL 3.1.4 CONTRAST and BRIGHTNESS can be directly controlled with UP / Down key. 3.1.5 VOLUME can be controlled with LEFT / RIGHT key. 3.2. MECHANICAL SPECIFICATIONS 3.2.1 Dimension Height: 437mm Width: 426mm Depth: 198mm 3.2.2 Net Weight: 5.0 kg 3.2.3 Maximum Viewable Area: Diagonal 482.6mm(19") 3.3. PANEL SPECIFICATIONS
Part No. Driver bit of panel Contrast ratio Brightness Pixel pitch Response time View angle Color coordinate
CLAA190EA03 8bit + dithering 500:1 250 cd/ m2 0.294 mm Typical 16 ms 70/70/70/60degree x=0.313,y=0.329
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3.4. CONNECTORS 3.4.1 AC inlet : CEE22 typed connector 3.4.2 Attached video signal cable connector x 1
Pin Shell 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Signal Name Red video Green video Blue video Ground Ground Red ground Green return Blue return N/C Ground Ground SDA (serial data) Hsync Vsync (VCLK) SCL (serial clock)
1 6
2
3
4
5 10
11 12 13
14 15
Figure 3.4
Signal cable input connector.
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3.5. ELECTRICAL SPECIFICATIONS
3.5.1 Standard conditions
Display area (HxV) Video signal level Contrast Brightness Ambient Temperature Input voltage Warming up time
Display mode
378.3*303mm 0.7 Vpp Max. Max. 25 +/- 5 C degrees Universal power At least 30 1280 x 1024
3.5.2 POWER 3.5.2.1 Power supply AC-DC adapter
Input voltage Input current Frequency range Inrush current 100-240V Max. 0.8Arms 47 - 63 Hz Shall be less than the ratings of critical components (Including fuse, rectifiers and surge limiting device) for all conditions of line in voltage. Maximum power consumption: 50 Watts
3.5.2.2 Power Management
MODE H-SYNC V-SYNC COLOR OF POWER LED On Off Active Inactive Active Inactive Green Amber POWER CONSUMPTION < 50 Watts < 1 Watts < 5 seconds RECOVERY TIME
At first power on w/o signal LED will be green blinking + message on screen.
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3.5.3 Signal level and input impedance 3.5.3.1 Video Signal level This LCD display is adjusted at the factory using 0,7 Vp-p Video signal. 3.5.3.2 Sync Signal level H/V Separate: TTL level 3.5.3.3 Input impedance Video input: 75 ohms +/- 1% Sync input: > 1 k ohms 3.5.4 Display Area Display area: 378.3*303mm
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3.5.5 Preset Timings The product has 32 memory modes in total. 15 modes are preset and 17 modes are user definable.
1 Format 640x350@70Hz
2 720x400@70Hz
3
4
5
640X480@6 640x480@7 640x480@7 0Hz 2Hz 5Hz
Pixel Clock(MHz) Horizontal Sync Polarity Frequency(KHz) Total Time(pixels) Display Time(pixels) Sync Width(pixels) Back Porch(pixels) Front Porch(pixels) Blank time(pixels) Vertical Sync Polarity Frequency(Hz) Total Time(lines) Display Time(lines) Sync Width(lines) Back Porch(lines) Front Porch(lines) Blank time(lines)
25.176
28.320
25.175
31.500
31.500
P 31.470 800 640 96 48 16 160
N 31.467 900 720 108 54 18 180
N 31.469 800 640 96 40 8 144
N 37.861 832 640 40 120 16 176
N 37.500 840 640 64 120 16 200
N 70.089 449 350 2 60 37 99
P 70.082 449 400 2 35 12 49
N 59.940 525 480 2 25 2 29
N 72.809 520 480 3 20 1 24
N 75.00 500 480 3 16 1 20
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6 Format Pixel Clock(MHz) Horizontal Sync Polarity Frequency(KHz) Total Time(pixels) Display Time(pixels) P 35.156 1024 800 72 Back Porch(pixels) Front Porch(pixels) Blank time(pixels) Vertical Sync Polarity Frequency(Hz) Total Time(lines) Display Time(lines) Sync Width(lines) Back Porch(lines) Front Porch(lines) Blank time(lines) P 56.250 625 600 2 22 1 25 128 24 224 800x600@56Hz 36.000
7 800x600@60Hz 40.000
8 800x600@72Hz 50.000
9 800x600@75Hz 49.500
P 37.879 1056 800 128 88 40 256
P 48.077 1040 800 120 64 56 240
P 46.875 1056 800 80 160 16 256
P 60.317 628 600 4 23 1 28
P 72.188 666 600 6 23 37 66
P 75.000 625 600 3 21 1 25
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10 Format Pixel Clock(MHz) Horizontal Sync Polarity Frequency(KHz) Total Time(pixels) Display Time(pixels) N 48.363 1344 1024 1024x768@60Hz 65.00
11
12
13 1024X768@75Hz 78.750
1024X768@70Hz 1024X768@72Hz 75.000 78.000
N 56.476 1328 1024
N 58.036 1344 1024 1024
P 60.023 1312
Sync Width(pixels) Back Porch(pixels) Front Porch(pixels) Blank time(pixels) Vertical Sync Polarity Frequency(Hz) Total Time(lines) Display Time(lines) Sync Width(lines) Back Porch(lines) Front Porch(lines) Blank time(lines)
136 160 24 320
136 144 24 304
132 164 24 320
96 176 16 288
N 60.004 806 768 6 29 3 38
N 70.069 806 768 6 29 3 38
N 71.916 807 768 6 30 3 39
P 75.029 800 768 3 28 1 32
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14 Format Pixel Clock(MHz) Horizontal Sync Polarity Frequency(KHz) Total Time(pixels) Display Time(pixels) Sync Width(pixels) Back Porch(pixels) Front Porch(pixels) Blank time(pixels) Vertical Sync Polarity Frequency(Hz) Total Time(lines) Display Time(lines) Sync Width(lines) Back Porch(lines) Front Porch(lines) Blank time(lines) P 60.020 1066 1024 3 38 1 42 P 63.981 1688 1280 112 248 48 408 1280x1024@60Hz 108.000
15 1280x1024@75Hz 135.000
NA
NA
P 79.976 1688 1280 144 248 16 408
P 75.025 1066 1024 3 38 1 42
A B C D E
: H-Total : H- Sync width : H- Back porch : H- Video width : H- Front porch
O P Q R S
: V-Total : V- Sync width :.V- Back porch : V- Video width :.V- Front porch
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3.5.6 General performance 3.5.6.1 Maximum pixel clock 135 MHz 3.5.6.2 Maximum luminance Test conditions: 100% all white pattern, brightness set to Maximum typical: 250 cd/m2 min : 200cd/m2 3.5.6.3 Brightness variation Value Conditions 75 % Variation (C / A x 100) Display image: Full white Brightness : Maximum Contrast : Maximum A: Luminance at center position 3.5.6.4 Contrast ratio (CR) Value Conditions CR= B / A Contrast : Maximum Brightness : max B: Full white pattern A: Full black pattern 3.6. ENVIRONMENTS
The environmental conditions are in accordance to IEC 721
Operating: Temperature: Humidity: Height: Air pressure: Storage (unpacked) Temperature: Humidity: -20°C - +60° C 8% - 95% noncondensing 0°C - +40° C 20% - 80% noncondensing 3658 m 700 - 1060 mbar
Height: Air pressure:
12193 m 700 - 1060 mbar
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Transport (packed) Temperature: Humidity: Height: -20°C - +60° C 8% - 95% noncondensing 12000 m
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3.7. REGULATORY STANDARDS 3.7.1 Safety standards This monitor applies to various safety & EMI standards May refer to the logo label 3.7.2 EMC standards FCC part 15,subpart B , class-B (EMV) CE marking 3.8. OTHERS UL, cUL, 3.9. P0WER CORD Northern Hemisphere Version: UL / CSA approved power cord. European: VDE approved power cord. 3.10. SIGNAL CABLE Signal cable with Mini D-Sub 15P connectors. Length: 1.8 meter. 3.11. RELIABILITY > 30000hrs (demonstrated MTBF)
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4. THEORY OF OPERATION
This section describes the function of the LCD monitor per functional block. L9EA monitor includes MB Board (including audio board function inside), power board and button board. 4.1 MB BOARD The MB board is a two-layer, single-landed design with ground and ground planes provided. The VGA cable is a signal cable that contains video signal, sync signal and DDC signal from PC VGA adapter This system board consists of 3 functional areas : flat panel controller, Micro controller and audio controller.
4.1.1 Flat panel controller... Mstar TSU16AK (U3)
The heart of the system board is Mstar TSU16AK. The TSU16AK is a graphics processing IC for LCD monitor. It provides some control functions required for LCD panel. On-chip functions include a high-speed triple-ADC , PLL, high sacling engine and OSD controller. a) Clock Generation : Crystal Input Clock (XTALI and XTAL). This is the input pair to an internal crystal oscillator and corresponding logic. A 14.318 MHz crystal is recommended. b) Hardware Reset ( Pin 32 ) Hardware Reset signal is generated by MTV312 (U5/Pin 26).It assert a reset signal at least 1 ms. c) Analog to Digital Converter The TSU16AK chip has three ADC's (analog-to-digital converters), one for each color (red, green and blue) . The analog RGB signals are connected to TSU16AK as described below
Pin Name Red + Red Green + Green Blue + Blue -
Pin Number 63 62 60 59 58 57
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d) OSD : The TSU16AK has a fully programmable, high-quality OSD controller. The on-chip Static RAM (256 different fonts at size of 12X18) stores the cell map and the cell definitions. e) Inverter Brightness control (PWM0) (Pin 73) The TSU16AK has one PWM output PWM0(Pin73) to control Inverter Brightness Range. f) Panel LVDS interface (Pin 102~103, Pin106~113, Pin118~125, Pin128, Pin1) The TSU16AK driver interface is highly programmable. It supports LVDS port for panel.
4.1.2 Micro controller......MTV312 (U5)
The MYSON MTV312 microcontroller serves as the system microcontroller.That is , it programs the TSU16AK and manages other devices in the system such as the keypad, the backlight, LED and audio general purpose input/output pins. Pin number 23 22 16 21 41 9 25 24 29 28 19 18 20 26 42 37 40 36 3 Pin name P1.5 P1.4 P6.2 P1.3 P5.4 P6.3 P1.7 P1.6 P3.0/RXD/HSCL P3.1/TXD/HSDA P3.2/INT0 P1.1 P1.2 P6.1/AD1 P5.3 P4.1 P5.5 P4.0 P5.0 Pin function Key-Sel/Auto Key-Menu Key-Left Key-Power on/off LED-Green Key-Right Key-Down Key-Up SCL-VGA/RxD(Debug) SDA-VGA/Txd(Debug) INT SDA(Debug) SCL(Debug) RESET LED-Orange Audio-Mute Audio-Stby-Power Inverter On/Off Panel power On/Off
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4.2
Power Module
The power module includes an Inverter and Power regulator. The electrical specification described as following:
4.2.1 Power Characteristics.
Input
Rated Input Voltage Operation Input Voltage Range Max Input AC Current Efficiency
90~240 Vac,50/60Hz 90~264 Vac,47~63Hz < 1.2A 12Vdc load 3.5A Brightness Voltage from 0.3~3Vdc ON/OFF Voltage : High(3.3Vdc)/Low(0Vdc)
Brightness Voltage(Vadj) On/Off Voltage Output Static Output Characteristics
0.3Vdc(Max) ~ 3Vdc(Min) High(3.3Vdc)/Low(0Vdc) 12V/3.5A Output : 11.4Vdc ~ 12.6Vdc
4.2.2 Inverter output characteristics.
Rated Output Kick-off Voltage Rated output Voltage Rated Output Frequency Rated Output Current per tube
1500 ~ 2000 Vrms 720Vrms 40 ~ 60 Khz 7mArms
4.2.4 Power module of connector definition ;
CN110 ; Pin 1 & 2 ----> Vdc Output ( 12V +/- 5%) Pin 3 & 4 ---------> GND Pin 5 ---------> Brightness Control Voltage Pin 6 ---------> On /Off ( "High" set Lamp on ) Pin 1 ---------> HV ( High Voltage for CCFL ) Pin 2 ---------> Return ( Low Voltage for CCFL )
CN1 ~ CN4 ;
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5 CONTROL LOCATION
Button Define
1 2 OSD Menu UP Trigger OSD Main Menu / Clear OSD 1. Select OSD Main Menu Item 2. Trigger Brightness/Contrast Menu. 1. Select OSD Main Menu Item 2. Trigger Brightness/Contrast Menu. Switch Power ON/OFF 1. Decrease Menu Item value 2. Trigger Volume Menu. 1. Increase Menu Item value 2. Trigger Volume Menu. 1. Switch OSD Main Menu focus status. 2. Perform Auto configuration.
3
DOWN
4
POWER
5
LEFT
6
RIGHT
7
SELECT/ AUTO
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LED Status
Color Green Amber Normal status
Status Description
Enter Sleep Mode status or use "Power + Auto" key enter factory mode
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Dialog Overview
OSD Main Menu
When user press the Menu key under none OSD status will trigger this menu appear for detail parameters adjust. This menu will display about 20 seconds if no one press other key, otherwise will refresh display time length.
Brightness/Contrast Menu
When user press the Up or Down keys under none OSD status will trigger this menu appear for Brightness and Contrast adjust. This menu will display about 20 seconds.
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Auto Configuration
When user press the select/Auto key under none OSD status will trigger this dialog appear and perform Auto Configuration procedure.
Mode Information
When Display timing changed this dialog will appear about 3 seconds. And this feature only enable when "Information" indicate On in OSD's other page of main menu.
No Signal
When user does not support the video signal from the cable this dialog will appear about 10 seconds. And then enter the Sleep mode. One special case was in factory mode, the display time length will become 5 seconds for testing the power consumer.
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Out Of Range
When user input the video signal out of spec this dialog will appear about 10 seconds. And then enter the Sleep mode.
OSD Main Menu
Brightness & Contrast Adjustment
Brightness (Up&Down): Adjust the brightness of the display. Contrast (Left&Right): Adjust the difference between the light and dark areas.
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Tracking Adjustment
CLOCK: Adjust to minimize any vertical bars or stripes visible on the screen background. The horizontal screen size will also change. PHASE: Adjust to remove any horizontal distortion, and clear or sharpen the image of characters.
Position Adjustment
V-Position: Adjust the vertical position of the picture. H-Position: Adjust the horizontal position of the picture.
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Color Adjustment
There are four items for color adjustment: 9300K: Bluish white 6500K: Reddish white User defined: Red, Green, Blue. Adjust to set your own color level.
Other
LANGUAGE: Multi- Language selection OSD POSITION: Adjust the OSD window position on the screen. INFORMATION: Display Information Dialog or not when input timing changed. RESET: Recall to factory settings.
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Factory1 Adjustment
This page only visible in factory mode R,G,B OFFSET : Adjust current RGB cut off level R,G,B GAIN : Adjust current RGB Driver value. SSPLL and SSMOD : Adjust chip set internal frequency spread effect for EMI testing.
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Factory2 Adjustment
This page only visible in factory mode AUTO BURN : Use the chip set internal pattern for hot running monitor panel and inverter. AUTO COLOR : Perform Auto Balance measurement . AUTO COLOR 1 : Perform Auto Balance measurement by chip set internal signal. And reference these values to initial all other color temperature detail parameters. COLOR UPDATE : Force presently R,G,B offset and gain parameters update to currently temperature memory address. FACTORY RESET : Recall to factory setting and power off immediately. VERSION : Display F/W version.
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6. NECESSARY EQUIPMENT LIST
Item Personal Computer with Windows 98/95 Luminance Meter Minolta CA 110 Video Generator : Chroma 2000,2135,2250 or equivalent Color Analyzer : Minolta CA110 , Chroma or equivalent Watt / Power Meter 10 Times Magnifier
1 2 3 4 5 6
7 Ruler /Template 8 Thickness gauge
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7. BLOCK DIAGRAM 7.1 Power module
To Panel lamp
Inverter Output
Voltage Output
12V/3.25A
Power Module
AC Input 90 ~ 264V
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7.2 Main Board
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8. CONDUCTOR VIEW Main Board Silkscreen
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Power Board Silkscreen
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Button Board Silkscreen
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9. SCHEMATIC DIAGRAM Main Board
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L9C Monitor Power Board Circuit
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10.EXPLODED VIEW
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11 TROUBLE SHOOTING HINTS
1.No power
No Power
Check Power Module Output CN110 Pin 1,2 = 12V?
NO
Change Power Board
OK
Check Scalar Module Output CN6 Pin 1,2 = 12V?
NO
Change Cable From(Power module)CN110 to (Scalar/B)CN6
OK
Check Power Button From Scalar/B(CN4) to Button/B(CN1)
NO
Check Cable Open?
YES
Change Cable
NO
Change Switch or Button Board
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L9C Monitor 2.No Characters , Missing one color
No Characters or Missing one
Check CN6 12V Output
NO
Change Power Board
OK Check L33 , 5V Output OK Check L34 , 2.5V output
Change Power Board
NO
Check or Change U21,Q13,Q17
NO
Check or Change U22
OK Check L31 , 3.3V output Check Inverter NO From Power board OK? NO Check or Change U23
OK Check CN9 to Panel Signal Output OK
NO Check or Change Cable or Panel
Check X'Tal 11.059Mhz and 14.318Mhz
NO
Change X1 or X2
OK Change VGA Cable NO Check H,V SYNC?
OK
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L9C Monitor 12. REPLACEMENT PARTS LIST( See appendix)
13.Auto White Balance Procedure
1 2 3 4 5 6
Connect signal to monitor. The display signal need contain real black and full white. Press "Auto" button(don't release) when power ON(LED display Amber). Press OSD select FACTORY 2, Auto Color, RUN(For AD converter calibration on R, G and B gain, offset). Select Color Update, RUN. Press OSD select COLOR into 6500 and check by color analysis (If adjustment Press OSD select FACTORY 1 for Adjust the R, G, B gain. Please make color update when finished adjustment on 6500) Press OSD select COLOR into 9300 and check by color analysis (If adjustment Press OSD select FACTORY 1 for Adjust the R, G, B gain. Please make color update when finished adjustment on 9300) Please make sure that Brightness set 100, Contrast set 80 when adjust(factory default). The adjustment result needs to be checked by Color Analysis like CA110, the input signal 0.7V
*
and full white pattern while on check.
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