Envision EN7400e Page 1 of 55 17” LCD Monitor EN7400e THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS. MANUFACTURE DATE: Jul-22-2005 SERVICE MANUAL Envision EN7400e Page 2 of 55 REVISION DATE MODIFIACTION A00 Jul-22-2005 Initial release Envision EN7400e Page 3 of 55 TABLE OF CONTENTS Revision List ---------------------------------------------------------------------------------- 02 Table of Contents ---------------------------------------------------------------------------------------- 03 1. Monitor Specifications --------------------------------------------------------------------------------04 2.LCD Monitor Description -----------------------------------------------------------------------05 3.Operation Instructions --------------------------------------------------------------------------06 3.1 General Instructions -----------------------------------------------------------------------06 3.2 Control Button ------------------------------------------------------------------------------06 3.3 Adjusting The Picture ---------------------------------------------------------------------07～08 4. Input/Output Specification ------------------------------------------------------------------- 08 4.1 Input Signal Connector -------------------------------------------------------------------09 4.2 Factory Preset Display Modes ----------------------------------------------------------10 4.3 Power Supply Requirements ------------------------------------------------------------11 5.Panel Specification----------------------------------------------------------------------------------12 5.1 General Feature ----------------------------------------------------------------------------12 5.2 Optical Characteristics --------------------------------------------------------------------13 6. Block Diagram -----------------------------------------------------------------------------------13 6.1 Monitor Exploded View ------------------------------------------------------------------13 6.2 Software Flow Chart -----------------------------------------------------------------------15～16 6.3 Electrical Block Diagram -----------------------------------------------------------------17～19 7. Schematic -----------------------------------------------------------------------------------------20 7.1 Scalar Board ---------------------------------------------------------------------------------20～23 7.2 Power Board -------------------------------------------------------------------------24～25 8. PCB Layout ---------------------------------------------------------------------------------------26 8.1 Main Board ----------------------------------------------------------------------------------26 8.2 Power Board --------------------------------------------------------------------------------27 8.3 KEY Board ------------------------------------------------------------------------------ 27 9. Maintainability -----------------------------------------------------------------------------------28 9.1 Equipments and Tools Requirements -------------------------------------------------28 9.2 Trouble Shooting ---------------------------------------------------------------------------29～34 10. White-Balance, Luminance Adjustment ----------------------------------------------- 35 11. Check List after replacing LCD Main board----------------------------------------------- 36～38 1 2 . E D I D C o n t e n t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 9 13. BOM List ----------------------------------------------------------------------------------40～55 Envision EN7400e Page 4 of 55 1. MONITOR SPECIFICATIONS Driving system TFT LCD Size 43cm(17") Type QD17EL07 (QDI) Pixel pitch 0.264mm(H) x 0.264mm(V) Viewing angle 160(H) 145(V) (R>5) Luminance 270cd/㎡ Contrast Ratio 450:1 Response time 16ms (typ) LCD Panel Display colors 16.2 million Colors R G B Analog 0.7Vp-p H/V separate TTL level H/V composite TTL level Horizontal frequency 30kHz–80kHz Vertical rate 55-75Hz Input signals Recommend resolution 1280 x 1024@60HZ ON MODEL ≤45W Stand by ≤3W Suspend ≤3W Power consumption OFF MODEL ≤3W Power supply AC voltage 100~240VAC,47~63Hz Maximum Screen Size Horizontal: 337.9mm，Vertical: 270.3mm Operating condition Temperature 5-35°C Storage Condition Temperature -20-60°C Dimension Unpackaged 407 mm (W) x 434mm (H) x 173mm (D) Envision EN7400e Page 5 of 55 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, a power board and a keypad board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage. PWPC board (Include: adapter, inverter) Flat Panel and CCFL backlight Main Board Keyboard RS232 Connector For white balance adjustment in factory mode HOST Computer CCFT Drive. AC-IN 100V-240V Video signal, DDC Monitor Block Diagram Envision EN7400e Page 6 of 55 3. OPERATING INSTRUCTIONS 3.1 GENERAL INSTRUCTIONS Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. • The power cord should be connected. • Connect the video cable from the monitor to the video card. • Press the power button to turn on the monitor position. The power indicator will light up. 3.2 FRONT PANEL CONTROL NO. Name Within OSD Without OSD 1 Auto/Exit 1. Exit Sub menu 2. Exit the menu item Run the Auto Adjust when this button keep to push for 2 second 2 Brightness 1.Move the cursor to left 2.Adjust down when menu item selected Open the Brightness menu 3 Contrast 1.Move the cursor to right 2.Adjust up when menu item selected Open the contrast menu 4 MENU Select Function or select Sub menu Activate OSD main menu 5 Indicator Green—On Red—Save Green—On Red—Save 6 Power Power On / Off Power On / Off Envision EN7400e Page 7 of 55 3.3 ADJUSTING THE PICTURE THE DESCRIPTION FOR CONTROL FUNCTION: Main Menu Item Main Menu Icon Sub Menu Item Sub Menu Icon Description Adjust Range Reset Value Contrast Contrast from Digital-register. 0-100 Recall Cool Contrast Value Luminance Brightness Backlight Adjustment 0-100 Recall Cool Brightness Value Focus Adjust Picture Phase to reduce Horizontal-Line noise 0-100 Do Auto Config Image Setup Clock Adjust picture Clock to reduce Vertical-Line noise. 0-100 Do Auto Config H. Position Adjust the horizontal position of the picture. 0-100 Do Auto Config Image Position V. Position Adjust the vertical position of the picture. 0-100 Do Auto Config C1 N/A Recall warm Color Temperature from EEPROM. N/A C2 N/A Recall cool Color Temperature from EEPROM. N/A User / Red Red Gain from Digital-register. 0-100 User / Green Green Gain from Digital-register. 0-100 Color Temp. User / Blue Blue Gain from Digital-register. 0-100 The Color Temperature will be set to Cool. The User R/G/B value (default is 100) will not be Modified by Reset function. Auto Config (Analog-Only Yes N/A Auto Adjust the H/V Position, Focus and Clock of picture. N/A N/A Envision EN7400e Page 8 of 55 Model) No N/A Do not execute Auto Config, return to main menu. N/A N/A H. Position Adjust the horizontal position of the OSD. 0-100 50 V. Position Adjust the vertical position of the OSD. 0-100 50 OSD Setup OSD Timeout Adjust the OSD timeout. 10-120 10 English N/A Set OSD display language to English. N/A Deutsch N/A Set OSD display language to German. N/A Français N/A Set OSD display language to French. N/A Español N/A Set OSD display language to Spain. N/A Language Italiano N/A Set OSD display language to Italian. N/A The Language will be set to English. Information Information N/A Show the resolution, H/V frequency and input port of current input timing. N/A N/A Yes N/A Clear each old status of Auto-configuration and set the color temperature to Cool. N/A N/A Reset No N/A Do not execute reset, return to main menu. N/A N/A Exit N/A N/A Exit OSD N/A N/A Envision EN7400e Page 9 of 55 4. INPUT/OUTPUT SPECIFICATION 4.1 INPUT SIGNAL CONNECTOR ANALOG D-SUB CONNECTOR PIN NO. DESCRIPTION PI N NO. DESCRIPTION 1. Red 9. +5V 2. Green 10. Logic Ground 3. Blue 11. Monitor Ground 4. Monitor Ground 12. DDC-Serial Data 5. DDC-Return 13. H-Sync 6. R-Ground 14. V-Sync 7. G-Ground 15. DDC-Serial Clock 8. B-Ground VGA connector layout 1 5 6 10 11 15 Envision EN7400e Page 10 of 55 4.2 FACTORY PRESET DISPLAY MODES VESA MODES Horizontal Vertical Mode Resolution Total Nominal Frequency +/- 0.5kHz Sync Polarity Nominal Freq. +/- 1 Hz Sync Polarity Nominal Pixel Clock (MHz) 640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175 640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500 VGA 640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500 800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000 800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000 800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000 SVGA 800x600@75Hz 1056x625 46.875 P 75.000 P 49.500 1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000 1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000 XGA 1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750 1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000 SXGA 1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000 IBM MODES Horizontal Vertical 2Mode Resolution Total Nominal Frequency +/- 0.5kHz Sync Polarity Nominal Freq. +/- 1 Hz Sync Polarity Nominal Pixel Clock (MHz) DOS* 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322 DOS** 640x400@70Hz 800 x 449 31.469 N 70.087 P 25.175 DOS 640x350@70Hz 800 x 449 31.469 P 70.087 N 25.175 MAC MODES VGA 640x480@67Hz 864x525 35.000 N 66.667 N 30.240 SVGA 832x624@75Hz 1152x667 49.725 N 74.551 N 57.2832 *, ** - The two complimentary modes feature the same horizontal and vertical sync frequencies and polarities, and therefore require manual selection. Envision EN7400e Page 11 of 55 4.3 POWER SUPPLY REQUIREMENT A/C Line voltage range : 100 V ~ 240 V A/C Line frequency range : 50 ± 3Hz, 60 ± 3Hz Current : TBD Peak surge current : < 55A peak at 240 VAC and cold starting Leakage current : < 3.5mA Power line surge : No advance effects (no loss of information or defect) with a maximum of 1 half-wave missing per second Voltage : 12VDC ± 5％ CURRENT : 3.5 Amp (max) Envision EN7400e Page 12 of 55 5. PANEL SPECIFICATION 5.1 GENERAL FEATURE This module is a color active matrix LCD module incorporating amorphous silicon TFT (Thin Film Transistor). It is composed of a color TFT-LCD panel; driver ICs, control circuit and power supply circuit and backlight unit. Graphics and texts can be displayed on a 1280× 3× 1024 dots panel with 16.2 million colors by using the LVDS (Low Voltage Differential Signaling) interface, 6-bit-2bit FRC driving method and supplying +5V DC supply voltage for TFT-LCD panel driving. The TFT-LCD panel used for this module has very high aperture ratio. A low-reflection and higher-color-saturation type color filter is also used for this panel. Therefore, high-brightness and high-contrast image, which is suitable for the multimedia use, can be obtained by using this module. � High aperture panel; high-brightness or low power consumption. � Brilliant and high contrast image. � Small footprint and thin shape. � SXGA resolution. � LVDS interface � Low power consumption. � Wide viewing angle. Display Characteristics Parameter Specification Unit Display size 43(17") Diagonal Cm 1280(H) × 1024(V) mm Pixel format (1 pixel=R+G+B dots) Pixel Active area 337.9(H)× 270.3(V) Pixel pitch 0.264(H)× 0.264(V) mm Pixel configuration R,G,B vertical stripe Display mode Normally White Unit outline dimensions(typ.)*1 358.5× 296.5× 16.5 mm Weight 1970(Max.) g Surface treatment Anti-glare and hard-coating 3H Low reflection (～5%) Lamp Quantity 4 pcs Envision EN7400e Page 13 of 55 5.2 OPTICAL SPECIFICATION Ta=25℃，VDD=+5V ELECTRICAL SPECIFICATIONS Envision EN7400e Page 14 of 55 6. BLOCK DIAGRAM 6.1 MONITOR EXPLORED Envision EN7400e Page 15 of 55 6.2 SOFTWARE FLOWING CHART 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18 Envision EN7400e Page 16 of 55 REMARK: 1) MCU initialize. 2) Is the EEprom blank? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EEprom. Turn on the LED and set it to green color. Scalar initialize. 10) In standby mode? 11) Update the lifetime of back light. 12) Check the analog port, are they’re any signals coming? 13) Does the scalar send out an interrupt request? 14) Wake up the scalar. 15) Are there any signals coming from analog port? 16) Display "No connection Check Signal Cable" message. And go into standby mode after the message disappear. 17) Program the scalar to be able to show the coming mode. 18) Process the OSD display. 19) Read the keyboard. Is the power key pressed? Envision EN7400e Page 17 of 55 6.3 ELECTRIAL BLOCK DIAGRAM 6.3.1 MAIN BOARD OSD Control Interface (CN403) Scalar gm2120 CG (Include MCU,ADC,OSD) (U203) Flash Memory A290011T-70 (U202) EEPROM 24C16 (U102) EEPROM 24C02 (U104) H sync V sync RGB RXD TXD DB15_SDA, DB15_SCL EPR_SDA EPR_SCL LCD Interface (CN301) D-Sub Connector (CN102) Envision EN7400e Page 18 of 55 6.3.2 INVERTER/POWER BOARD Inverter Block Envision EN7400e Page 19 of 55 Power Block Diagram Envision EN7400e Page 20 of 55 7. SCHEMATIC 7.1 MAIN BOARD 715L 972-1-6 GND C101 0.1uF/16V R129 47 1/16W 　 C102 0.1uF/16V RXC+ P.3 VGA_PG VGA_D1 R127 NC R112 100 1/16W 　 AGND R134 75 1/16W 　 C105 0.01uF DVI_5V ZD104 MLL5232B 5.6V R144 4.7K 1/16W 　 GREEN+ (10 mil, ┰ キ︽絬) D-SUB VS_in ZD102 MLL5232B 5.6V GND ED101 1 2 C108 0.01uF R123 10K 1/16W 　 R111 100 1/16W 　 C122 NC +5V AGND RX2- P.3 GPIO5/UART_DO Pins 6/7/8 are R/G/B return lines resp. RXC+IN C118 0.1uF/16V(NC) R151 10K 1/16W 　 12/10 R148 100 1/16W 　 +3.3V UART_DI P.3 R146 NC ZD108 MLL5232B 5.6V ZD103 MLL5232B 5.6V AGND GPIO4/UART_DI U102 M24C02WMN6 4 1 2 3 7 6 5 8 GND A0 A1 A2 WP SCL SDA VCC Rin SCL_IN ZD109 MLL5232B 5.6V DIGITAL USE AGND +5V R135 75 1/16W 　 (8 mil) GND C103 0.01uF R132 10K 1/16W 　 U106B 74LVC14A 3 4 14 7 ED105 1 2 D101 BAT54C-GS08 GND GND AGND RX0+IN DDC_SCL_D RX1- P.3 RX0- P.3 VGA_D1 D106 BAT54C-GS08 Connect two grounds at one single point only. GND +5V ED104 1 2 VS U106A 74LVC14A 1 2 14 7 DDC_SDA_A P.3 DDC_SDA_D DDC_SCL_A1 AGND RX1+IN RX2-IN GND FB102 80 OHM R157 0 1/16W 　 RX2+ P.3 GREEN- R150 0 1/16W 　 C113 0.1uF/16V R124 10K 1/16W 　 R142 10K 1/16W 　 AGND SCL_IN VGA_PLUG R161 0 1/16W 　 BLUE- R158 0 1/16W 　 DDC_SCL_A1 R154 0 1/16W 　 10/21 C121 0.1uF/16V(NC) R138 120 1/10W 　 +5V AGND R136 120 1/10W 　 RX0-IN R160 0 1/16W 　 C114 0.1uF/16V(NC) U104 M24C02WMN6 4 8 1 2 3 7 6 5 GND VCC A0 A1 A2 WP SCL SDA VGA_5V FB103 80 OHM R126 47 1/16W 　 75-ohm terminating resistor very close to the VGA conn. RX2+IN R116 NC ZD107 MLL5232B 5.6V D103 BAV99 RXC- P.3 C107 0.01uF R128 NC VGA_5V GND R140 120 1/10W 　 RX1-IN RED- R133 75 1/16W 　 GND GND GPIO5/UART_DO Gin C106 0.01uF C124 NC AGND ZD101 MLL5232B 5.6V RXC-IN C111 47pF(NC) Bin C119 0.1uF/16V(NC) CN102 DB15 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 S1 S2 DVI_5V GND HS GND R149 NC D104 BAV99 UART_DO P.3 DDC_SDA_D U106F 74LVC14A 13 12 14 7 R159 0 1/16W 　 GND AGND R141 100 1/16W 　 FB101 80 OHM ZD105 MLL5232B 5.6V C117 0.1uF/16V(NC) AGND DDC_SCL DDC_SDA SDA_IN C123 NC DDC_SDA_A1 CN101 JACK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 23 24 C1 16 22 C2 C3 C4 C5 25 26 T2- T2+ SGND T4- T4+ DDCCLK DDCDAT A_VSYNC T1- T1+ SGND T3- T3+ +5V GND T0- T0+ SGND T5- T5+ TC+ TC- A_RED HPD SGND A_GREEN A_BLUE A_HSYNC A_GND A_GND A_GND R125 47 1/16W 　 ED108 1 2 GND GND SDA_IN R139 100 1/16W 　 ED106 1 2 DVI_PLUG P.3 BLUE+ DDC_SCL_A P.3 ED107 1 2 +5V R131 10K 1/16W 　 ED102 1 2 gm2120 B ANALOG&DIGITAL INPUT 715L972-1-6(for IBM L170 &AOC) C 2 5 Thursday, August 21, 2003 Title Size Document Number Rev Date: Sheet of DDC_SCL_D R137 100 1/16W 　 GPIO4/UART_DI C110 47pF(NC) DVI_5V RED+ U106E 74LVC14A 11 10 14 7 D105 BAV99 C116 0.1uF/16V(NC) GND RX0+ P.3 C109 0.1uF/16V RX1+ P.3 GND AGND DDC_SDA_A1 R109 10K 1/16W 　 C120 0.1uF/16V(NC) VGA_CONN VGA_D2 GND ZD110 MLL5232B 5.6V ED103 1 2 AGND +5V SCL_IN HS_in C115 0.1uF/16V(NC) VGA_D2 R117 NC R110 10K 1/16W 　 R147 100 1/16W 　 GND AGND C104 0.01uF R145 NC SDA_IN HOT_PLUG ZD106 MLL5232B 5.6V R130 47 1/16W 　 R143 100 1/16W 　 R101 10K 1/16W 　 Envision EN7400e Page 21 of 55 A3.3V GPIO8 P.5 SDA C242 0.1uF/16V SCL C254 0.01uF Determines polarity of HCLK signal OCM_ROM_CFG(1) (use 0 or 2 level smith trigger) SDA DHS P.5 LED_ORANGE P.5 OB1 R236 NC +5V ER4 USER_BITS(4:0) WP R205 1K 1/16W 　 D201 LL4148 SPEC(150mA) GREEN- P.2 RX1+ P.2 DVI_PLUG OG3 C227 0.1uF/16V GPIO3 MUTE ER3 C257 0.1uF/16V SET 0 GND GND RMADDR9 ER0 RMADDR7 EB5 R247 4.7K 1/16W 　 RMADDR14 FB206 600OHM R231 NC C202 0.1uF/16V ADDRESS XTAL SCL RMADDR11 C233 0.1uF/16V Close to respective power Pins D3.3V RMADDR0 FB202 600OHM Int_Test U203 PQFP208 171 170 167 166 163 162 179 180 185 186 191 192 151 152 40 41 42 43 44 45 46 47 49 50 51 52 118 115 117 116 195 194 174 120 121 122 123 124 125 126 127 128 206 207 208 1 205 204 5 4 6 7 48 39 201 25 24 23 22 19 18 17 16 15 8 35 34 33 32 31 30 29 28 9 10 14 12 13 11 36 155 153 165 169 161 158 157 178 2 20 53 67 81 97 111 129 26 88 134 203 176 113 114 175 182 184 188 190 197 198 199 150 149 148 146 144 141 139 145 140 137 136 3 21 38 54 68 82 98 112 130 89 133 202 135 156 154 177 183 189 147 143 138 200 159 61 62 65 66 69 70 71 72 94 93 75 76 77 78 79 80 74 73 85 86 87 90 91 92 84 83 95 96 99 100 101 102 64 63 105 106 107 108 109 110 104 103 119 27 131 142 132 60 59 58 57 56 55 37 160 164 168 172 173 181 187 193 196 RED+ RED- GREEN+ GREEN- BLUE+ BLUE- RX2+ RX2- RX1+ RX1- RX0+ RX0- XTAL TCLK GPIO0/PWM0 GPIO1/PWM1 GPIO2/PWM2 GPIO3/TIMER1 GPIO4/UART_D1 GPIO5/UART_D0 GPIO6/EXTCLK GPIO7 GPIO10/TCON_ROE3 GPIO11 GPIO12 GPIO13 DCLK/TCON_OCLK DEN/TCON_ECLK DVS/TCON_FSYNC DHS/TCON_LP RXC- RXC+ REXT TCON_OPOL TCON_OINV TCON_ESP TCON_EPOL TCON_EINV TCON_RSP2 TCON_RSP3 TCON_RCLK TCON_ROE GPIO20/HDATA3 GPIO19/HDATA2 GPIO18/HDATA1 GPIO17/HDATA0 GPIO16/HFS GPIO22/HCLK RESETn GPIO21/IRQn DDC_SCL DDC_SDA GPIO9/TCON_ROE2 GPIO8/IRQINn CLKOUT ROM_ADDR0 ROM_ADDR1 ROM_ADDR2 ROM_ADDR3 ROM_ADDR4 ROM_ADDR5 ROM_ADDR6 ROM_ADDR7 ROM_ADDR8 ROM_ADDR15 ROM_DATA0 ROM_DATA1 ROM_DATA2 ROM_DATA3 ROM_DATA4 ROM_DATA5 ROM_DATA6 ROM_DATA7 ROM_ADDR14 ROM_ADDR13 ROM_ADDR9 ROM_ADDR11 ROM_ADDR10 ROM_ADDR12 ROM_OEn VDD1_ADC_2.5 VDD2_ADC_2.5 AGND_GREEN AGND_RED AGND_BLUE AGND_ADC SGND_ADC AGND_RX2 RVDD RVDD RVDD RVDD RVDD RVDD RVDD RVDD CVDD_2.5 CVDD_2.5 CVDD_2.5 CVDD_2.5 VDD_RX2_2.5 PPWR PBIAS AGND_IMB VDD_RX1_2.5 AGND_RX1 VDD_RX0_2.5 AGND_RX0 AGND_RXC AGND_RXPLL VDD_RXPLL_2.5 AVDD_RPLL AVSS_RPLL VDD_DPLL_3.3 AVDD_SDDS VDD_SDDS_3.3 AVDD_DDDS VDD_DDDS_3.3 AVSS_SDDS AVSS_DDDS HSYNC VSYNC RVSS RVSS RVSS RVSS RVSS RVSS RVSS RVSS RVSS CVSS CVSS CVSS CVSS GND1_ADC GND2_ADC GND_RX2 GND_RX1 GND_RX0 VSS_DPLL VSS_SDDS VSS_DDDS N/C ADC_TEST PD6/ER6 PD7/ER7 PD10/EG2 PD11/EG3 PD12/EG4 PD13/EG5 PD14/EG6 PD15/EG7 PD33/OG1 PD32/OG0 PD18/EB2 PD19/EB3 PD20/EB4 PD21/EB5 PD22/EB6 PD23/EB7 PD17/EB1 PD16/EB0 PD26/OR2 PD27/OR3 PD28/OR4 PD29/OR5 PD30/OR6 PD31/OR7 PD25/OR1 PD24/OR0 PD34/OG2 PD35/OG3 PD36/OG4 PD37/OG5 PD38/OG6 PD39/OG7 PD9/EG1 PD8/EG0 PD42/OB2 PD43/OB3 PD44/OB4 PD45/OB5 PD46/OB6 PD47/OB7 PD41/OB1 PD40/OB0 TCON_OSP CVSS Reserved N/C Reserved PD5/ER5 PD4/ER4 PD3/ER3 PD2/ER2 PD1/ER1 PD0/ER0 RVDD AVDD_ADC AVDD_BLUE AVDD_GREEN AVDD_RED AVDD_IMB AVDD_RX2 AVDD_RX1 AVDD_RX0 AVDD_RXC ER7 EG3 ER1 /CE R242 0 1/16W 　 GND RMADDR10 x 1 C260 NC NC Analog RMDATA6 GND NAME GND GND OB3 C212 0.1uF/16V SPEC(500mA) +PV D3.3V RX2+ P.2 OR[0..7] P.5 RX2- P.2 OG5 EB1 R224 620 1/16W 　 OR4 EB3 EG1 R251 10K 1/16W 　 R201 4.7K 1/16W 　 x 1 = All 48K of ROM is in external ROM GND A3.3V EG[0..7] P.5 DDC_SDA P.2 GPIO3 P.5 SPEC(50mA) RMADDR12 R244 NC C253 0.1uF/16V X201 14.318MHz 1 2 GND UART_DO P.2 RMADDR4 R238 NC C228 0.1uF/16V DESCRIPTION PBIAS P.5 HS P.2 DVI_PLUG P.2 R240 47 1/16W 　 C203 0.1uF/16V Close to respective power Pins EG2 RMADDR13 RMDATA5 C263 0.001uF OG1 R234 10K 1/16W 　 R210 0 1/16W 　 +T3.3V BANK0 RMDATA3 C246 33pF 1 GPIO(22:16) is on "Host Port" pins RX0+ P.2 R223 10K 1/16W 　 RMADDR2 OR7 RMDATA0 ER6 WP OB2 C218 0.1uF/16V ROM_ADDR8 GPIO4/UART_DI RMADDR1 SOT-23 GND OR1 RMADDR5 GPIO4/UART_DI RMADDR5 +PV GND RXC- P.2 BLUE+ P.2 RMDATA7 RMADDR9 x PPWR P.5 RMDATA2 EB7 D3.3V EB4 RMADDR13 C251 0.1uF/16V FB207 600OHM C214 0.1uF/16V GND GND EB[0..7] P.5 DDC_SDA_A P.2 DHS TEST PAD C231 0.1uF/16V C261 0.001uF HOST_PROTOCOL +2.5V DISP_CLK P.5 OB4 R233 NC +2.5V R232 10K 1/16W 　 RMADDR3 OB7 R202 0 1/16W 　 +5V R249 0 1/16W 　 1 = OCM becomes active after OCM_CLK is stable 0 RMDATA7 RMADDR6 RMADDR10 R248 0 1/16W 　 R203 NC D3.3V Available for reading from a status register OR2 RMADDR15 R218 1K 1/16W 　 R245 4.7K 1/16W 　 HOST_PORT_EN RX0- P.2 VGA_PLUG RMADDR0 RMADDR3 C255 0.1uF/16V ER5 BANK0 OG2 RMADDR0 C226 0.1uF/16V C206 0.1uF/16V C219 0.1uF/16V ADD C261 11/22 /ROM_WE OSC_SEL x RMADDR12 + C222 47uF/16V RS232 OG6 OCM_START GND C201 0.1uF/16V R213 0 1/16W 　 A2.5V GND EB6 A3.3V U202 SOCKET 3 29 28 4 25 23 26 27 5 6 7 8 9 10 11 12 21 20 19 18 17 15 14 13 24 31 32 1 16 2 30 22 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 OE WE VCC NC GND A16 NC/A17 CE ADD C264 11/22 GND PWM0 P.4 FUNCTION1 P.5 LVDS_EN P.5 RMADDR1 EB0 C215 0.1uF/16V Available for reading from a status register 1 GND DVS P.5 GPIO5/UART_DO /CE C208 0.1uF/16V + C230 47uF/16V OG[0..7] P.5 RMADDR14 RMADDR3 OR6 C247 33pF DIGITAL PORT GND GPIO6 P.5 RMDATA6 OR0 C259 33pF GND C241 0.1uF/16V UART_DI P.2 EG4 C252 0.01uF R219 0 1/16W 　 /ROM_WE ER2 C240 0.1uF/16V ADD C262 11/22 GND RMDATA1 C210 0.1uF/16V ROM_ADDR5 GREEN+ P.2 +PV EG5 C207 0.1uF/16V 32-Pin PLCC Socket R233---10K H/W Power Key RMDATA4 C249 0.1uF/16V OB[0..7] P.5 GPIO2 P.5 OB5 RMADDR4 EG6 R250 0 1/16W 　 USER_BITS(7:5) D2.5V RMDATA3 RMADDR14 C220 0.1uF/16V C256 0.01uF + C245 10uF/16V C209 0.1uF/16V ADD C263 11/22 D2.5V RMADDR15 ROM_ADDR6 ROM_ADDR7 RX1- P.2 U201 NC 1 2 3 GND RSTN VCC R234---NC input H/V not Reversed +3.3V A2.5V /ROM_WE DEN /ROM_WE EB2 C234 0.1uF/16V RED- P.2 RMADDR8 RMADDR10 R204 5pF If using 6-wire host protocol, program this bit to 1 DDC_SCL P.2 ROM_OEn D2.5V RMADDR4 RMADDR8 R221 10K 1/16W 　 FB204 600OHM 911205: To Switch on Chip Enable Function STDBY R227 0 1/16W 　 Reserved GND VS P.2 BLUE- P.2 R207 10K 1/16W 　 ROM_ADDR9 +3.3V OG7 C216 0.1uF/16V R208 10K 1/16W 　 R237---10K DUAL RMADDR2 RMADDR9 U204 M24C16-MN6T 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SI SCK WP VCC FLASH/ Prom-Jet Socket +PV +PV RXC+ P.2 RMDATA5 OB6 R243 NC 0 = XTAL and TCLK pins are connected +PV A2.5V GPIO5/UART_DO R212 NC C213 0.1uF/16V D3.3V EG7 GPIO7 SCLPOL RMADDR2 R222 10K 1/16W 　 D3.3V C264 0.001uF ROM_ADDR(12:10) NC S/W Power Key OG0 OG4 C217 0.1uF/16V + C250 22uF/16V C248 0.1uF/16V GND GPIO7 P.5 +T3.3V ER[0..7] P.5 RED+ P.2 RMDATA2 RMDATA4 RMADDR11 + C221 47uF/16V Close to respective power Pins DDC_SCL_A P.2 VGA_PG P.2 OR3 FB210 0 1/16W 　 LED_GRN P.5 GPIO0/PWM0 RMDATA0 R214 10K 1/16W 　 C232 0.1uF/16V ROM_ADDR13 10K input H/V Reversed +5V DEN P.5 OB0 R237 NC R215 10K 1/16W 　 R241 NC FB208 0 1/16W 　 CN202 NC 1 2 3 4 +5V TXD RXD GND C238 0.1uF/16V ROM_ADDR(4:0) +5V GND RMDATA1 RMADDR7 EG0 R206 10K 1/16W 　 C258 0.01uF + C211 100uF/16V SPEC(60mA) R209 NC A3.3V GND DVS R239 10K 1/16W 　 +5V GND VOL GPIO6 OR5 RMADDR1 C204 0.1uF/16V If using 6-wire host protocol, program this bit to 0 ROM_ADDR14 (use 1 level smith trigger) gm5120/gm2120 B gm5120/gm2120 715L972-1-6 (for IBM L170 & AOC) C 3 5 Thursday, August 21, 2003 Title Size Document Number Rev Date: Sheet of R235 0 1/16W 　 GND RMADDR6 RMADDR11 C205 0.1uF/16V R246 4.7K 1/16W 　 C262 0.001uF C239 0.1uF/16V BOOTSTRAP SIGNALS GND RMADDR12 RMADDR8 C244 0.1uF/16V Close to respective power Pins Envision EN7400e Page 22 of 55 LVDS_ON + C304 10uF/16V OB2 + C306 10uF/16V TX0-O + C315 10uF/16V TX0+O TX3+E TX3+E EG6 TX0-O TX0-E OB3 GND OR[0..7] P.4 +P5V Q301 PMBS3904 GND OG2 OG0 C314 0.1uF/16V TXCK+O EG3 +3.3V C320 100pF R315 0 1/16W 　 OG[0..7] P.4 R302 10K 1/16W 　 TXCK-E PANEL_P FB304 600OHM EG[0..7] P.3 OG5 C309 0.1uF/16V OR2 LVDS Interface GND TXCK-O FB305 600OHM C318 0.1uF/16V + C317 10uF/16V DEN FB306 600OHM LVDS_EN P.3 OR3 TX2-O EG2 OG4 ER6 TX1+O TX1-O C311 0.1uF/16V FB303 600OHM EB5 OR7 OR0 +3.3V TX3+O TXCK+O TXCK+E +3.3V EB4 EG1 R308 3K 1/16W 　 DISP_CLK TX0-E C310 0.1uF/16V R304 100K 1/16W 　 TX3-O FB302 600OHM GND TX1+E TX1-E TX2-E TX0+O C322 0.01uF TX3-O DEN P.3 OR5 TX3-E + C312 22uF/16V 12/19 OB4 TX2-E R303 100K 1/16W 　 ER2 C305 0.1uF/16V GND Custom 4 5 Thursday, August 21, 2003 Title Size Document Number Rev Date: Sheet of TXCK-O GND GND R317 NC OB0 EG7 PPWR P.3 TX0+E TX2+E TX1-E C319 NC OR1 DEN EB0 EG5 GND TX2+E (5mm) TX3+O TX1-O R313 0 1/16W 　 DHS1 ER3 C316 0.1uF/16V EB[0..7] P.3 DHS P.3 GND DVS1 OG7 ER7 R314 NC 12/19 DVS P.3 TX1+O GND +5V C307 0.1uF/16V LVDS_ON GND ER0 EB2 TX3-E C301 0.1uF/16V OB[0..7] P.4 OG6 TX2+O CONNECTOR for PANEL OB6 EB1 R316 NC +3.3V R311 0 1/16W 　 ER[0..7] P.3 ER5 C300 0.1uF/16V +5V GND TX2-O R312 NC OB5 FB301 600OHM GND OB1 GND DISP_CLK P.3 DISP_CLK TX1+E EB6 EB7 OG3 DHS1 OR4 ER4 +3.3V +3.3V TX2+O + C313 47uF/16V C302 0.1uF/16V CN301 CONN 2 4 6 8 10 12 14 16 18 20 22 24 1 3 5 7 9 11 13 15 17 19 21 23 TXCK-E DVS1 TX0+E EB3 EG0 U301 THC63LVDM83R 42 17 50 14 5 38 8 43 28 31 23 40 47 20 48 27 52 6 13 7 10 30 12 36 21 49 44 33 51 16 34 25 1 29 46 32 53 24 22 3 11 18 56 54 55 15 37 39 41 35 2 26 19 4 45 9 TXOUT2- R_FB TXIN27 TXIN14 GND TXOUT3- TXIN10 LVDSGND TXIN25 TXCLKIN TXIN21 TXCLKOUT- TXOUT0+ TXIN19 TXOUT0- TXIN24 TXIN1 TXIN8 GND TXIN9 TXIN11 TXIN26 TXIN13 LVDSGND GND LVDSGND LVDSVCC PLLGND TXIN0 TXIN16 PLLVCC TXIN23 V GND TXOUT1- PWRDWN GND TXIN22 TXIN20 TXIN6 TXIN12 TXIN17 TXIN4 TXIN2 TXIN3 TXIN15 TXOUT3+ TXCLKOUT+ TXOUT2+ PLLGND TXIN5 V TXIN18 TXIN7 TXOUT1+ V OB7 EG4 OR6 R310 0 1/16W 　 + C303 22uF/16V GND Q302 SI9933ADY-T1 1 2 3 4 8 7 6 5 S1 G1 S2 G2 D1 D1 D2 D2 TXCK+E C321 0.1uF/16V +P5V OG1 ER1 U302 THC63LVDM83R 42 17 50 14 5 38 8 43 28 31 23 40 47 20 48 27 52 6 13 7 10 30 12 36 21 49 44 33 51 16 34 25 1 29 46 32 53 24 22 3 11 18 56 54 55 15 37 39 41 35 2 26 19 4 45 9 TXOUT2- R_FB TXIN27 TXIN14 GND TXOUT3- TXIN10 LVDSGND TXIN25 TXCLKIN TXIN21 TXCLKOUT- TXOUT0+ TXIN19 TXOUT0- TXIN24 TXIN1 TXIN8 GND TXIN9 TXIN11 TXIN26 TXIN13 LVDSGND GND LVDSGND LVDSVCC PLLGND TXIN0 TXIN16 PLLVCC TXIN23 V GND TXOUT1- PWRDWN GND TXIN22 TXIN20 TXIN6 TXIN12 TXIN17 TXIN4 TXIN2 TXIN3 TXIN15 TXOUT3+ TXCLKOUT+ TXOUT2+ PLLGND TXIN5 V TXIN18 TXIN7 TXOUT1+ V Envision EN7400e Page 23 of 55 PBIAS P.4 + C401 47uF/16V C433 NC KEY_AUTO STDBY R412 4.7K 1/16W 　 CN403 CONN 1 2 3 4 5 6 7 8 9 Brightness C419 NC C428 NC GND C429 NC KEY RIGHT BackLight On/Off VOL + C406 150uF/25V GND C418 0.1uF/16V GPIO3 P.3 R403 10K 1/16W 　 KEYON_OFF CN402 CONN 1 2 3 4 5 6 CONNECTOR for POWER/INVERTER Board LED_ORANGE P.4 MUTE + C408 150uF/25V GPIO8 P.3 U106D 74LVC14A 9 8 14 7 STDBY MAIN SOT-223 GND KEY LEFT RP401 4.7K 1/16W 　 1 2 3 4 8 7 6 5 R402 100 1/16W 　 R415 1K 1/16W 　 GRNLED CN401 CONN 1 2 3 4 5 6 TO-252 +5V KEY_AUTO REDLED +5V GPIO6 P.3 GND +T3.3V C403 0.01uF MAIN VOL PWM0 C421 NC R413 4.7K 1/16W 　 C420 0.001uF C430 NC PWM0 P.4 FUNCTION1 P.3 GRNLED GND U106C 74LVC14A 5 6 14 7 CONNECTOR for KEYBOARD C409 0.1uF/16V MUTE C414 0.01uF gm5120/gm2120 A K.B AND CONNECTOR 715l972-1-6(for IBM L170 & AOC) B 5 5 Thursday, August 21, 2003 Title Size Document Number Rev Date: Sheet of GND REDLED STDBY GPIO2 P.3 GPIO7 P.3 + C417 47uF/16V ADD C425 11/22 +2.5V VOL KEY ENTER +5V + C416 22uF/16V LED_GRN P.4 GND R406 10K 1/16W 　 R401 100 1/16W 　 C431 NC +5V GND RP402 10K 1/16W 　 1 2 3 4 8 7 6 5 +3.3V + C404 150uF/25V C407 0.1uF/16V C422 0.01uF GND R414 0 1/16W 　 KEY LEFT C432 NC C402 0.1uF/16V C425 0.001uF + C412 150uF/25V C435 NC KEYON_OFF +3.3V C413 0.1uF/16V R405 4.7K 1/16W 　 KEY RIGHT U402 AIC1117-33CY 1 2 3 ADJ VOUT VIN C410 0.01uF +3.3V MUTE FB401 NC GND GND C405 0.1uF/16V C434 NC GND R404 620 1/16W 　 KEY ENTER U401 RT9164 1 2 3 ADJ VOUT VIN Envision EN7400e Page 24 of 55 7.2 POWER BOARD 715L1013-1A-1 Envision EN7400e Page 25 of 55 Envision EN7400e Page 26 of 55 8. LAYOUT 8.1 MAIN BOARD 715L 972-1-6 Envision EN7400e Page 27 of 55 8.2 POWER BOARD 715L1013-1A-1 8.3 KEY BOARD 715L 707-1-1 Envision EN7400e Page 28 of 55 9. Maintainability 9.1 Equipments and Tools Requirement 1. Voltmeter. 2. Oscilloscope. 3. Pattern Generator. 4. DDC Tool with an IBM Compatible Computer. 5. Alignment Tool. 6. LCD Color Analyzer. 7. Service Manual. 8. User Manual. Envision EN7400e Page 29 of 55 9.2 TROUBLE SHOOTING 9.2.1 MAIN BOARD Defect Mode Failure Analysis Repair Testing Completed NG Next Step Abnorma l Display Missing Line Bright Dot Dark Dot Light Leakage Mura Image Sticking Dot Defect Brightness Spot Dot Defect Particle Check Panel Panel Change No display Check Power Board Check Main board Check Panel Change Panel Change Main board Change Power Board Check Keyboard Change Keyboard Check Line Connected Power board and Minored Change Wires Noise Check Main board Check Panel Change Main board Change Panel Test A Envision EN7400e Page 30 of 55 A Test Completed A Noise Check Single Cable Change Single Cable Flicker Check Main board Change Main board Check Panel Change Panel Abnormal Gray Check Main board Change Main board Check Panel Change Panel Check LVD Cable Change LVD Cable R\G\B Display Abnormal Check Single Cable Change Single Cable Check Main board Change Main board Check Panel Change Panel Monitor Shut Down Check Power board Change Power board Check Keyboard Change Keyboard Check Main board Change Main board No signal Check Single Cable Change Single Cable Check Main board Change Main board Power on Display Abnormal Check Main board Change Main board Next Step Envision EN7400e Page 31 of 55 Change Keyboard or Main board Change Keyboard or Main board or wire Change Keyboard Change Main board Change Main board Change LVDS Wire LED Off Change Keyboard or Main board or wire Change Keyboard or Main board or wire A Change Wires LED Abnormal LED Dark LED Display Abnormal LED Flicker Abnormal Keyboard Check Wires Check Keyboard Check Main board Abnormal OSD Check Main board Check LVDS Wire Test Completed Next Step Envision EN7400e Page 32 of 55 9.2.3 POWER/INVERTER BOARD 1.) No power Is there 12V output to Inverter NG Check AC line volt 110V or 220V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circut Check start voltage for the pin3 of IC901 Check R906,R907 and Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V 1) Check IC901 2) Check ZD901, Q902, Q903…OVP circuit OK OK OK NG NG NG Check Q901, R914, T901, D910, D911, ZD902 OK Check IC901 pin8 PWM wave OK Check IC901 NG Envision EN7400e Page 33 of 55 2.) No Backlight Check C201 (+) =12V NG OK Check main board Check ON/OFF signal Check main board NG OK Check U201 pin9=12V NG OK Change Q201 or Q202 Check the pin1 of U201 have saw tooth wave NG Change U201 Check D201/D202 (-) have the output of square wave at short time NG Check Q205/Q207/Q203/D201 Check Q206/Q208/Q204/D202 Check the resonant wave of pin2 & pin5 for PT201/PT202 NG OK Check the output of PT201/PT202 Check Q209/Q210/C213 Check Q211/Q212/C214 Check connecter & lamp OK NG Change PT201/PT202 OK OK Envision EN7400e Page 34 of 55 9.2.2 KEYPAD BOARD OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Is Button Switch normally? Replace Button Switch Y N N Is Key Pad Board normally? Replace Key Pad Board Y N Y Check Main Board Envision EN7400e Page 35 of 55 10. WHITE- BALANCE, LUMINANCE ADJUSTMENT Approximately 30 minutes should be allowed for warm up before proceeding White-Balance adjustment. 1. How to do the Chroma-7120 MEM. Channel setting A. Reference to chroma 7120 user guide B. Use “ SC” key and “ NEXT” key to modify XyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust 2. Setting the color temp. you want A. MEM.CHANNEL 3 (7800 color): 7800 color temp. parameter is x = 296 ± 30, y = 311 ± 30, Y = 200 ± 10 cd/m2 , B. MEM.CHANNEL 4 (6500 color): 6500 color temp. parameter is x = 313± 30, y = 329 ± 30, Y = 200 ± 10 cd/m2 3. Into factory mode of EN7400e Press MENU button during 2 seconds along with press Power button will activate the factory mode, then MCU will do AUTO LEVEL automatically. Meanwhile press MENU the OSD screen will be located at LEFT TOP OF PANEL. 4. Bias adjustment: Set the Contrast to 50; Adjust the Brightness to 80. 5. Gain adjustment: Move cursor to “-F-” and press MENU key A. Adjust C2 (7800) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 3 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 296 ± 30, y = 311 ± 30, Y = 200 ± 10 cd/m2 4. Adjust the RED of color1 on factory window until chroma 7120 indicator reached the value R=100 5. Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached the value G=100 6. Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4,5,6) until chroma 7120 RGB value meet the tolerance =100± 2 B. Adjust C1 (6500) color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 313 ± 30, y = 329 ± 30, Y = 200 ± 10 cd/m2 4. Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R=100 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 6. Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4,5,6) until chroma 7120 RGB value meet the tolerance =100± 2 C. Turn the Power-button off to quit from factory mode. Envision EN7400e Page 36 of 55 11．CHECK LIST AFTER REPLACING LCD MAIN BOARD Check if white-balance is within the specs after replacing Main board and panel, then re-writing DDC is necessary. 11.1 THE WHITE-BALANCE VALUE FOR EACH COMMON COLOR TEMPERATURE: C1/ 6500 º K:（warm color）x = 313±30 ; y = 329±30; C2/ 7800 º K:（cool color）x=296±30 ; y = 311±30; Remark: The color temperature value above must be up to the situation of x