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AOC LCD Monitor P/N : 41A50-144, Руководство по обслуживанию, Страница: 18 / 82

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17

II (a) THE SCREEN is Abnormal , stuck at white screen, OSD window can’t appear, but 
keyboard & LED was normal operation. 
 

At general, this symtom is cause by missing panel data or panel power, so we must check our 
wire-harness which connected to panel or the panel power controller (U202) 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

II. (b)The screen had the Vertical Straight Line, might be stuck in Red, Green, Blue 

That symptom is cause by bad Panel issue ( might be the Source IC from Panel is cold solder or 

open loop ) so REPLACE THE PANEL TO NEW ONE.

 

 

Check if the Wire harness from CN601 & CN602 loose? 
Check the wire on both Panel-side and Mainboard side.

Check the 

Panel-Power

 circuit as above (page 15) 

U202 pin 5,6,7,8 ,must be 5V 

Yes, tight enough 

Yes, Voltage normal 

Check the 

LVDS-Power 

L603,L604,L601,L602,L900= 3.3V ? 

Check the both U601 & U602 

LVDS-Input 

pin 31= 45mhz – 

65mhz, and pin 27 = Vsyn freq,    pin 28 = 45khz- 65 khz 

Yes, Voltage normal 

Yes, Frequency normal 

Replace both LVDS chip ( U601 & U602) 

Tighten it. 

NG

Check U904,which convert the 5V to 
3.3V 

Check 

U200 DATA-OUPUT

 block as 

above ( page 15) 

NG

Check 

OSCILLATOR Block

 as 

above ( page 15) 

NG,no data output 

Replace U302 MCU and check it RESET 
pin 10 ,must be turn high to low when first 
AC power-on 

OK,all clock is normal 

Replace U200 GMZAN1 

OK, reset is normal 

Check 

U200 DATA-OUTPUT

 block again 

NG,still no data out 

Содержание LCD Monitor P/N : 41A50-144

Страница 1: ...SERVICE MANUAL SPECTRUM Series LCD Monitor LM 700 LM 700A P N 41A50 144...

Страница 2: ...ERY 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 ERRO...

Страница 3: ...ECIAL FUNCTION WITH PRESS KEY 10 5 3 THE OPTIONAL ON MAINBOARD USING SHUTTLE 4 KEY 10 5 4 THE OPTIONAL ON MAINBOARD OR OTHER ACCESSORY USING DIFFERENT PANEL 10 5 5 SIMPLE INTRODUCTION ABOUT LM500 CHIP...

Страница 4: ...ermination impedance 75 OHM 5 Scanning Frequencies Horizontal 29 KHz 80 KHz Vertical 55 Hz 75 Hz Pixel clock 135 MHz 6 Factory Preset Timing 18 User Timings 19 Input signal tolerance H tolerance 1 K V...

Страница 5: ...drive the backlight of panel The Adapter will provides the 12V DC power 5 Amp to Main board and Inverter module Monitor Block Diagram 1 3 Interface Connectors A AC Power Cable B Video Signal Connecto...

Страница 6: ...e power is turn off 2 Please do not change variable resistance settings in MAIN BOARD they are adjusted to the most suitable value If they are changed it might happen LUMINANCE does not satisfy the wh...

Страница 7: ...nsure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 5V power from VGA card 2 GREEN 10 GND 3 BLUE 11 SYNC GND 4 G...

Страница 8: ...e and use ID key to modify the TEXT description Following is the procedure to do white balance adjust Press MENU button during 2 seconds along with plug in the DC power cord will activate the factory...

Страница 9: ...witch the MEM channel to Channel 06 with up or down arrow on chroma 7120 4 The lcd indicator on chroma 7120 will show x 313 10 y 329 10 Y 160 5 cd m2 5 Adjust the RED on OSD window until chroma 7120 i...

Страница 10: ...ration and re do auto configuration for all mode This function also recall 7800 color temperature if the monitor status was in Factory mode this reset function will clear Power on counter backlight co...

Страница 11: ...t of range H 81kHz v 75Hz or H 28kHz v 55Hz b INPUT frequency out of VESA spec out of tolerance too far 3 UNSUPPORT mode try different Video card Setting Input frequency out of tolerance but still can...

Страница 12: ...IZE for saving DDC CONTENT 4 24C04 ATMEL IC EePROM type 4K ROM SIZE for saving AUTO config data White balance data and Power key status and Backlight counter data 5 LM2569S NS brand switching regulato...

Страница 13: ...al RGB Panel Control Signal Dhs Dvs Dclk Panel Power 5V Communication signal Hclk Hfs Hdata0 Input analog RGB H V ddc signal Rs232 communication Oscillator 50 mhz Crystal 20 mhz DDC chip PANEL Main bo...

Страница 14: ...he data with backup value Initial GMZAN1 Yes POWER ON START Initial MCU I O Interrupt vector Ram Initial 1 POC backlight counter 2 Clr all mode value Yes Check if in Factory mode when power on press t...

Страница 15: ...e Out of range input not support be confirm Set mode index parameter Set change mode flag No No Yes Yes confirm the frequency Hsyn or Vsyn from IFM already been changed check the change mode flag Proc...

Страница 16: ...enough Led Green Check Panel Power Circuit Block Check U200 Data output Block OK Panel Power OK Replace Inverter and Check Inverter control relative circuit Re do White balance adjust OK U200 data OK...

Страница 17: ...CN303 Pin 1 12V pin 3 on off control 5V on NG still no screen Check the Bklt On relative circuit R315 Q304 R311 In normal operation when LED green R315 Bklt On should 0 v If Bklt On no response when...

Страница 18: ...the wire on both Panel side and Mainboard side Check the Panel Power circuit as above page 15 U202 pin 5 6 7 8 must be 5V Yes tight enough Yes Voltage normal Check the LVDS Power L603 L604 L601 L602...

Страница 19: ...as stuck Check NG NG If still no Led green indicator check Q102 R106 LED at keyboard cold solder or bad NG MCU no response Check U302 pin 20 20MHz and pin 44 VDD 5V and pin 10 reset 0V at normal condi...

Страница 20: ...ans all 3 3v is no load U200 Gmzan1 was shut down and only U302 MCU still working that means the monitor is in power saving status all power system is working well OK Check U304 pin 2 is a stable rect...

Страница 21: ...g is not quite well Does your noise only exist in one mode only ex only at 1280x1024 75 Hz other is normal OK OK Yes has extension NG interferences still exist NG NO additional extension cable That wa...

Страница 22: ...240 10 cd m2 NG NG If the Y less than 160 cd m2 after the VR201 MAX contrast brightness max then change the LAMP of panel If Y can reach 190 cd m2 that means The lamp still working well so we just re...

Страница 23: ...parts used in CHI MEI M170E1 17 inch 4 C C F L LCD monitor 3 CONNECTOR PIN ASSIGMENT 4 1 CON1 INPUT MODEL NO S5B PH SM3 TB 4 2 CON2 CON3 OUTPUT MODEL NO SM04 4 0 B BHS 1 TB PIN SYMBOL DESCRIPTION 1 V...

Страница 24: ...Input voltage Vin 10 8 12 13 2 V Input current Iin 2200 2500 mA output current adj 0v min Iout min 2 1 2 6 3 1 mA FOR 1 CCFL LOAD 120K Output current adj 5 v max Iout max 5 5 6 0 6 5 mA FOR 1 CCFL LOA...

Страница 25: ...24 S A M P O C O R P O R A T I O N TROUBLE SHOOTING OF CHI MEI INVERTER DIVTL0037 D42 7 CIRCUIT DIAGRAM G D D D D S S S G D D D D S S S...

Страница 26: ...7 5K 5 YAGEO 10 R15 16 VRMHNVA 433J A 2 SMD 0603 43K 5 YAGEO 11 R17 18 VRMHNVA 271J A 2 SMD 0603 270 5 YAGEO 12 R27 VRMHNVA 472J A 1 SMD 0603 4 7K 5 YAGEO 13 R28 29 VRMHNVA 392J A 2 SMD 0603 3 9K 5 YA...

Страница 27: ...5Z A 1 SMD 0805 2 2 F 16V TDK 32 C21 VCLFBN1CY475Z A 1 SMD 0805 4 7 F 16V TDK 33 D1 2 DIODE VSDRLS4148 A 2 SMD RLS4148 ROHM 34 D3 4 VSDRB160L40 A VSDSMA160 A 2 SMD RB160L40 SMD SMA160 ROHM TPC 35 D5 6...

Страница 28: ...ROUBLE SHOOTING 9 1 NO POWER FAIL PASS FAIL PASS FAIL PASS CHECK ON FUSE F1 Vin 12 TO CHANGE F1 4 0A 63V TO CHECK ON Q4 Q6 Vout 9V TO CHANGE L Q4 Q3 R Q5 Q6 TO CHECK ON L1 L2 INPUT 9V TO L1 OR L2 TO C...

Страница 29: ...GE PROTECTION FAIL PASS 9 3 OUTPUT CURRENT ABNORMALITY FAIL PASS 1 SHORT R30 OPEN LOAD 2 TEST C14 INPUT POINT VOLTAGE Vh 1600 100V rms TO CHANGE ON PT1 OR PT2 FUNCTION TEST OK 1 CHECK ON C6 FREQUNCY C...

Страница 30: ...AIL PASS 9 5 DIMMING CONTROL ABNORMALITY FAIL PASS IF ENBALE ABNORMALITY 1 TO CHECK IC PIN 9 TURN NO HAVE 12 VOLTAGES TO CHANGE ON Q1 Q2 FUNCTION TEST OK IF DIMMING ABNORMALITY TO CHECK R1 R2 C6 HAVR...

Страница 31: ...AIL PASS 10 INSTRUMENTS FOR TEST 1 DC POWER SUPPLY GPS 3030D 2 AC VTVM VT 181E 3 DIGITAL MULTIMERTER MODEL 34401 4 HIGHTVOLT PROB MODEL 1137A 5 SCOPE MODEL V 6545 6 AC mA METER MODEL 2016 YOKOGAWA IF...

Страница 32: ...L17 2 CH White AC ADAPTER CH 1205 TROUBLE SHOOTING NO VOLTAGE O P CHECK BD101 AC VOLT I P OK CHECK BD101 DC VOLT O P OK CHECK U101 PIN7 12 15Vdc OK CHECK U101 PIN4 FREQ 50 70KHZ OK CHECK Q101 PIN G PI...

Страница 33: ...32 I Adapter Schematic CH 1205 Please see the ADAPTER SCHEMATIC in the end of this Document page 75...

Страница 34: ...3 COIL CHOKE 5uH 5 20 RD005 1 PCS 45M56 509C 19 D104 D105 D108 D109 DIODE 1N4148 75V 150mA SMD 4 PCS 15A2N41480 20 D102 D103 DIODE RLS245 SMD 2 PCS 15AHLS2450 21 D106 D107 DIODE SCHOTTKY MBR20100CT 10...

Страница 35: ...K 1 8W 5 SMD 0805 4 PCS 2242547010 62 R102 R103 RES 470K 1 4W 5 SMD 1206 2 PCS 2243547030 63 R122 RES 47K 1 8W 5 SMD 0805 1 PCS 2242547020 64 R126 RES 510 1 8W 5 SMD 0805 1 PCS 2242551000 65 R138 RES...

Страница 36: ...PCS 0820400020 91 DC OUTPUT POWER CABLE UL1185 18AWG 5 5 2 5 20 5 L 80CM 1 PCS 56L1807811 92 FRONT HEATSINK FOR CH 1205 1 PCS 75170 0060 93 BOTTOM HEATSINK FOR CH 1205 REV C 1 PCS 75170 005C 94 FRPP...

Страница 37: ...status Check J1 J2 is well connected Measured J2 pin 4 5 2 3 is well connected Check is speaker open circuit Plug in the DC power set the monitor ON status Check R10 R11 J5 S1 is open circuit Check U...

Страница 38: ...2200uF 25V 3 1 C5 10uF 50V 4 2 C6 C7 0 047uF 5 1 C8 100uF 16V 6 1 C9 100uF 25V 7 1 D1 LED 8 2 J1 J3 CON2 9 1 J2 EAR PHONE 10 1 J4 AUDIO IN 11 1 J5 DC IN 12 3 VR1 R1 R2 10K 13 1 R3 33K 14 1 R4 68K 15...

Страница 39: ...ts needed z All color depths up to 24 bits pixel are supported High Quality Advanced Scaling z Fully programmable zoom z Independent horizontal vertical zoom z Enhanced and adaptive scaling algorithm...

Страница 40: ...for ADC analog blocks that are shared by all three channels Includes bandgap reference master biasing and full scale adjust Must be bypassed with 0 1uF capacitor to pin 82 ADC_GNDA 83 Reserved For int...

Страница 41: ...B9 I O Multi Function Bus 9 One of twelve multi function signals MFB 11 0 Also used as HDATA3 in a 4 bit host interface configuration 104 MFB8 I O Multi Function Bus 8 One of twelve multi function sig...

Страница 42: ...eserved For testing purposes only Do not connect 136 PLL_SVDDA Analog power for the Source DDS DAC Must be bypassed with a 0 1uF capacitor to pin 134 PLL_SGNDA 137 DAC_SVDDA Analog power for the Sourc...

Страница 43: ...6 OB4 25 PD33 O OB5 OB3 26 PD32 O OB4 OB2 27 PD31 O OB3 OB1 28 PD30 O OB2 OB0 29 PD29 O OG7 OG5 31 PD28 O OG6 OG4 32 PD27 O OG5 OG3 34 PD26 O OG4 OG2 35 PD25 O OG3 OG1 36 PD24 O OG2 OG0 37 PD23 O OR7...

Страница 44: ...ontrol the power to a flat panel Table 5 Test Pins PIN Name I O Description 3 PSCAN I Enable automatic PCB assembly test When this input is pulled high the automatic PCB assembly test mode is entered...

Страница 45: ...D ADC RGNDA TCLK R1 R R1 R RVDDA R1 R R1 R R1 R Video Connector C1 C L2 Vsync C2 C L1 Hsync CVDD Red Blue Green On Screen Display Controller MPU with EPROM R G B OSD FSW OSD FSW OSD CLK OSD HREF OSD V...

Страница 46: ...ency Panel Hsync frequency Input Hsync frequency Panel Vsync frequency Input Vsync frequency This mode is used when the input resolution is the same as the panel resolution and the input data clock fr...

Страница 47: ...cy Destination Htotal register value Panel Vsync frequency DCLK frequency Dest Htotal register value Dest Vtotal register value This mode is used when the input is changing or not available The OSD ma...

Страница 48: ...om the TCLK input is used as a reference clock The clock recovery circuit adjusts the SCLK period so that the feedback pulse generated every SCLK period multiplied by the Source Horizontal Total value...

Страница 49: ...cuit The difference is that DCLK is locked to SCLK while SCLK is locked to the Hsync input DCLK frequency divided by N is locked to SCLK frequency divided by M The value M and N are calculated and pro...

Страница 50: ...es a capture window and sends the input data to the data path block The figure below shows how the window is defined For the horizontal direction it is defined in SCLKs equivalent to a pixel count For...

Страница 51: ...chip has three ADC s analog to digital converters one for each color red green and blue Table 10 summarizes the characteristics of the ADC Table 10 ADC Characteristics MIN TYP MAX NOTE RGB Track Hold...

Страница 52: ...The IRQ generating conditions are programmable 2 4 1 Source Timing Measurement When it receives the active CRT signal R G B and Sync signals the Source Timing Measurement unit begins measuring the ho...

Страница 53: ...ation Conditions IRQ Event Remark Timing Event One of the three events z Leading edge of Vsync input z Panel line count the line count is programmable z Every 10ms Only one event may be selected at a...

Страница 54: ...quick brightness adjust An offset range of plus 127 4 to minus 127 4 is available 2 5 4 Panel Data Dither For TFT panels that have fewer than eight bits for each R G B input the gmZAN1 provides ordere...

Страница 55: ...is programmable from 2 mA to 20mA in increments of 2 mA Drive strength should be programmed to match the load presented by the cable and input of the panel Values shown are based on a loading of 20pF...

Страница 56: ...Vertical size in TFT b Vsync width and display position in TFT c Horizontal size in TFT d Hsync width in TFT t10 PDE t8 t12 RGB data from data paths t7 t9 PHS t11 Panel Background Color Displayed PCL...

Страница 57: ...occur and disable the panel permanently The gmZAN1 has a built in power sequencer Power Manager that prevents this kind of damage The Power Manager controls the power up down sequences for LCD panels...

Страница 58: ...tate until the internal TFT_Enable signal controlled by Panel Control register is disabled The panel can be disabled through either an API call under program control or automatically by the gmZAN1 to...

Страница 59: ...entered when a pull down resistor is not connected to MFB6 pin number 106 z 4 bit serial interface mode Same as gmB120 compatible mode with the addition of three data bits so that four data bits are...

Страница 60: ...the microcontroller and the gmZAN1 the microcontroller always acts as an initiator while the gmZAN1 is always the target The following timing diagram describes the protocol of the serial channel of t...

Страница 61: ...Data 11 8 Thus in this mode the HDATA pin carries Command0 Address2 Address6 Data0 Data4 and Data8 On the gmZAN1 reference design board the microcontroller toggles the HCLK and HDATA lines under progr...

Страница 62: ...programmable with an address resolution of 16 8 bits as the top bits of the 12 bit SRAM address The character code is a 12 bit value used as follows z D6 0 font map select this is the top seven bits o...

Страница 63: ...The shadow does not change the intensity of any panel background color over which it may be located The border and shadow are mutually exclusive only one may be selected at a time The OSD window is n...

Страница 64: ...rrent 10 uA 10 uA PVDD operating supply current 0 mA 20 mA pad 10pF 2 CVDD operating supply current 0 mA 500 mA 3 NOTE 1 5V Tolerent TTL Input pads are as follows z CRT Interface HSYNC pin 150 VSYNC 1...

Страница 65: ...64 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY For temporary this page still not available Wait for mechanical drawing...

Страница 66: ...44A 3234 1 EPS CUSHION L 44A 3234 2 EPS CUSHION R 44A 3234 5 CARTON AOC 44A 3253 1 BASE SHEET 45A 113 1 PE BAG 45A 114 1 PE BAG 45A 116 1 CLIP BAG 52A 1208 A ALUMINIUM TAPE 35X25 52A 194 1 50CM X 500...

Страница 67: ...66 PARTS LIST OF CABINET continue LOCATION T780KMGHBAA0A SPECIFICATION Q1A 1030 10128 SCREW Q1A 1030 12128 SCREW 3X12mm Q1A 1030 12128 SCREW 3X12mm 750A LCD 170 3 LCD PANEL M170E1 01 BY CHI MEI...

Страница 68: ...152 43 LABEL CBPC780GM 44A 3231 8 EVA U302 56A 1125 61 M M6759FG BY ALI C307 67A 305 331 6 330uF 20 35V C309 67A 305 331 6 330uF 20 35V C310 67A 305 331 6 330uF 20 35V C312 67A 305 331 6 330uF 20 35V...

Страница 69: ...CHIP 0 OHM 1 16W R218 61A 0603 101 CHIP 100 OHM 1 16W R219 61A 0603 101 CHIP 100 OHM 1 16W R220 61A 0603 101 CHIP 100 OHM 1 16W R227 61A 0603 101 CHIP 100 OHM 1 16W R213 61A 0603 102 CHIP 1KOHM 1 16W...

Страница 70: ...65A 0603 104 12 CHIP 0 1UF 16V X7R C304 65A 0603 104 12 CHIP 0 1UF 16V X7R C308 65A 0603 104 12 CHIP 0 1UF 16V X7R C311 65A 0603 104 12 CHIP 0 1UF 16V X7R C405 65A 0603 104 12 CHIP 0 1UF 16V X7R C601...

Страница 71: ...DIODES TZMC5V6 GS8 D208 93A 391 47 0 ZENER DIODES TZMC5V6 GS8 D209 93A 391 47 0 ZENER DIODES TZMC5V6 GS8 D210 93A 391 47 0 ZENER DIODES TZMC5V6 GS8 D200 93A 391 49 0 CHIP ZD 5 6V BY FULL POWMLL523 D2...

Страница 72: ...4 61A 6021 0352 T 10K OHM 5 1 6W R105 61A 6021 0352 T 10K OHM 5 1 6W R106 61A 6021 0352 T 10K OHM 5 1 6W R107 61A 6021 0352 T 10K OHM 5 1 6W R108 61A 6022 2152 T 220 OHM 5 1 6W C101 65A 450 104 7T 0 1...

Страница 73: ...1 4W R3 61A 172 333 5 2T 1 33K OHM 5 1 4W R12 61A 172 681 5 2T 1 680 OHM 5 1 4W R4 61A 172 683 5 2T 1 68K OHM 5 1 4W R10 61A 153M 109 5 9 1 1 OHM 5 3W R11 61A 153M 109 5 9 1 1 OHM 5 3W R7 61A 175L 134...

Страница 74: ...Output AC 1500V 30K 80KHz Current 14mA Main board power system LM2596S 5 12V to 5V 5A SPEC 5V To CPU Eeprom 24c21 control inverter on off 860mA when Cable not Connected 841mA when Normal operation To...

Страница 75: ...PCB LAYOUT Gmzan1 MCU LVDS Keyboard connector Inverter connector MCU Panel Power Control AIC1084 5V to 3 3v LVDS power LT1117 LM2596 convert 12V to 5V Input Connector DDC chip VR adjust for Lamp Lumi...

Страница 76: ...PHS PCLK OBLU OGRN ORED EBLU EGRN ERED PAGE 6 LVDS ERED EGRN EBLU OBLU OGRN ORED PCLK PHS PVS PDISPE 763 17 DSN A TOP LEVEL AOC Top Victory Electronics Co Ltd A 2 6 Monday December 11 2000 Title Size...

Страница 77: ...155 156 157 159 160 5 MFB5 MFB6 SRVDD1 RVDD1 SRVDD2 RVDD2 CVDD1 CVDD2 RVDD3 ADC_VDD2 ADC_VDD1 CVDD4 DVDD SVDD SYN_VDD PLL_RVDDA ADC_VDDA ADC_BVDDA ADC_GVDDA ADC_RVDDA DAC_DVDDA PLL_DVDDA PLL_SVDDA DAC...

Страница 78: ...GE V TXIN0 TXIN16 TXIN17 TXIN23 TXIN24 TXIN25 TXIN26 TXOUT3 TXOUT3 AVDD_3 3 PD16 PD41 TXE6 PD15 PANEL_P TXE5 U601 NT7181 TSSOP56 54 55 56 3 50 52 2 7 11 12 6 4 14 8 10 20 15 19 22 23 24 31 32 48 47 46...

Страница 79: ...1 42 43 1 12 23 34 20 21 10 11 13 14 15 16 17 18 19 EA VP T2 P1 0 T2EX P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 VCC GND P2 0 A8 P2 1 A9 P2 2 A10 P2 3 A11 P2 4 A12 P2 5 A13 P2 6 A14 P2 7 A15 PSEN ALE PROG P0...

Страница 80: ...Electronics Co Ltd A 5 6 Tuesday July 10 2001 Title Size Document Number Rev Date Sheet of R903 1K OP TP702 GND 1 C945 470uF 16V C941 0 1 uF U304 LM2596S 5 0 TO263 1 5 4 3 2 VIN ON FBK GND Vout C309 3...

Страница 81: ...20 4 7K R140 9 31K 1 R114 100 1 4W C113 300P NPO R117 100 1 APPROVAL C111 3300P LED101 LED R142 2 4K 1 C114 1000P U102 H11A817C300 A CHECK BY D106 MBR20100CT R136 113K 1 C122 0 1U Doc 02 CH 1205 B 1 1...

Страница 82: ...K GND GND J3 CON2 1 2 GND GND GND J2 EAR PHONE 1 2 3 4 5 R9 3K C9 100uF 25V GND J5 DC IN 1 2 GND U1 AN7522 1 2 3 4 5 6 7 8 9 10 11 12 VCC OUT1 GND OUT1 Stand by Vin1 GND Vin2 Volume OUT2 GND OUT2 GND...

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