AOC N936S Service Manual
AOC N936S Service Manual

AOC N936S Service Manual

18.5" lcd monitor

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18.5" LCD Monitor
Service
Service
Service
Description
Table of Contents....................................................1
Revision List...................................................................2
Important Safety Notice.................................................3
1.Monitor Specification...................................................4
2.LCD Monitor Description.........................................5
3.Operation Instruction.................................................6
3.1.General Instructions.................................................6
3.2.Control Buttons and Connections...............................6
3.3.OSD Setting..............................................................8
4.Input/Output Specification........................................27
4.1.Input Signal Connector..........................................27
4.2.Preset Display Modes................................27
4.3.Panel Specification...........................................28
5.Block Diagram............................................................30
5.1.Main Board.....................................................30
5.2.Power Board..................................................31
6.Schematic..........................................................32
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
6.1.Main Board.......................................................32
6.2.Power Board....................................................36
7.PCB Layout.........................................................38
7.1.Main Board......................................................38
7.2.Power Board.....................................................40
7.3.Key Board........................................................42
7.4.USB Board.......................................................42
8.Maintainability.....................................................43
8.2.Trouble Shooting.............................................44
10.Mechanical Instructions ............... ..............50
11.Monitor Exploded View......................................64
12.BOM List......................................................71
SAFETY NOTICE
1
AOC N936Sw
Horizontal Frequency
30-81 kHz
Page

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Summary of Contents for AOC N936S

  • Page 1: Table Of Contents

    18.5" LCD Monitor AOC N936Sw Service Service Service Horizontal Frequency 30-81 kHz TABLE OF CONTENTS Description Page Description Page Table of Contents…………………..…………………..…...1 6.1.Main Board..…….…...........32 Revision List.…...........……..2 6.2.Power Board..……….........36 Important Safety Notice.….…......……..3 7.PCB Layout..………..........38 1.Monitor Specification......………....4 7.1.Main Board………..…........38 2.LCD Monitor Description……….……………………..5 7.2.Power Board….…..........40...
  • Page 2: Revision List

    Revision List Revision Date Revision History Remark T8AMM5NK6WA1NNE T8AMM5NQ6WA1NNE T8BAM5NQ6WA1NNE Aug.-01-2011 Initial release T8BGM5NQ6WA1NNE T8BAM5NQ6WA2NNE T8BAM5NQ6WA1N6E...
  • Page 3: Important Safety Notice

    Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
  • Page 4: Monitor Specification

    1. Monitor Specifications Model number N936Sw Driving system TFT Color LCD Viewable Image Size 47.0cm diagonal Pixel pitch 0.3mm(H) x 0.3mm(V) LCD Panel Video R, G, B Analog lnterface & Digital Interface Separate Sync. H/V TTL Display Color 16.7M Colors Dot Clock 85.5MHz Horizontal scan range...
  • Page 5: Lcd Monitor Description

    2. LCD Monitor Description The LCD MONITOR will contain a main board, a power board, a key board and two USB boards 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.
  • Page 6: Operation Instruction

    3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected.
  • Page 7 Auto / Down Auto configure hot key: When the OSD is closed, press Auto button to do auto configure. Cable Connections On Back of Monitor and Computer 1. Power 2. Analog (DB-15 VGA cable) To protect equipment, always turn off the PC and LCD monitor before connecting. 1.
  • Page 8: Osd Setting

    3.3 OSD Setting Eco mode ---DCR, Standard, Text, Internet, Game, Movie, Sports...
  • Page 9 Standard Text Internet...
  • Page 10 Game Movie Sports Notes : When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
  • Page 11 Color Boost --- Full Enhance, Nature Skin, Sky-Blue, Green Field, Auto Detect, Demo, Off, Exit Full Enhance Nature Skin Sky-Blue...
  • Page 12 Green Field Auto Detect Demo...
  • Page 13 Exit Notes : Full Enhance: Total color saturation is enhanced, suitable for vivid pictures. Natural Skin: Suitable for human portrait. Green Field: Suitable for large area of green. Sky Blue: Suitable for sky or ocean scene. Auto Detect: Suitable for outdoor or garden. Demo: Screen divided into two for comparison purpose.
  • Page 14 Luminance ---Brightness,Contrast, Gamma Brightness Contrast Gamma...
  • Page 15 Exit Notes : When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted. Image Setup --- Clock, Phase, H.Position, V.Position, Exit Clock Phase...
  • Page 16 H.Position V.Position Exit Notes : When the input source is digital signal like DVI or HDMI, Image Setup can not be adjusted.
  • Page 17 Color Temperature ---User-R , User-G , User-B, Normal, Warm, Cool, sRGB, Exit User-R User-G User-B...
  • Page 18 Normal Warm Cool...
  • Page 19 sRGB Exit Notes : One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.
  • Page 20 Picture Boost --- V.Position, H.Position, Contrast, Brightness, Frame Size, Bright Frame, Exit V.Position H.Position Contrast...
  • Page 21 Brightness Frame Size Bright Frame...
  • Page 22 Exit Notes : One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly. Extra ---Language, Reset, DDC-CI,OSD Timeout, Transparency, V. Position, H. Position, Off Timer, Exit Language...
  • Page 23 Reset DDC-CI OSD Timeout...
  • Page 24 Transparency V. Position H. Position...
  • Page 25 Off Timer Exit...
  • Page 26 Exit LED Indicator...
  • Page 27: Input/Output Specification

    4. Input/Output Specification 4.1 Input Signal Connector Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Video-Blue N.C. Detect Cable GND-R GND-G GND-B Ground N.C. DDC-Serial data H-sync V-sync DDC-Serial clock 4.2 Preset Display Modes HORIZONTAL VERTICAL STAND RESOLUTION FREQUENCY(kHz) FREQUENCY(Hz) 640×480 @60Hz DMT...
  • Page 28: Panel Specification

    4.3 Panel Specification 4.3.1 General Features M185B1-L07 is a 18.5” TFT Liquid Crystal Display module with 2 CCFL Backlight unit and 30pin 1ch-LVDS interface. This module supports 1366 x 768 WXGA mode and can display up to 16.7M colors. The inverter module for Backlight is not built in.
  • Page 29 4.3.4 Optical Characteristics...
  • Page 30: Block Diagram

    5.Block Diagram 5.1 Main Board TSUM1PFR SCHEMATIC XGA/SXGA LVDS OUTPUT DSUB_R+ DSUB_R+ VCC1.8 DSUB_R- DSUB_R- DSUB_G+ DSUB_G+ VCC3.3 DSUB_G- DSUB_G- VCC1.8 DSUB_SOG DSUB_SOG CMVCC DSUB_B+ DSUB_B+ DSUB_5V DSUB_B- DSUB_B- VCC3.3 CMVCC1 DSUB_H DSUB_H DSUB_V DSUB_V DSUB_5V DDC1_SDA DDC1_SDA CMVCC VCC3.3 DDC1_SCL DDC1_SCL DET_CABLE...
  • Page 31: Power Board

    5.2 Power Board AC input Transformer 14.5V Bridge Rectifier EMI filter Rectifier (T901) diodes and Filter Start Resistor (R908) Feedback Power Switch PWM Control (Q901) Circuit LD7576 (U901) Photo coupler Regulator (U902) (U903) 14.5V Output Transformer MOSFET (T801) (Q803) Circuit Lamp PWM Control Feedback...
  • Page 32: Schematic

    47R 1/16W 5% LMBT3904LT1G R476 47R 1/16W 5% T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL AOC 836S Size C434 0.22uF G3244-G-X-X-6-090105 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 02.Input PCB NAME 715G3244-I <称爹>...
  • Page 33 LVA2P DSUB_SOG SOGIN0 LVA2M U402 DSUB_B+ BIN0P LVA1P DSUB_B- BIN0M LVA1M VCC1.8 DSUB_H HSY NC0 LVA0P 010A Befor AOC ID2007 OSD DSUB_V VSY NC0 LVA0M DDC1_SDA DDCA_SDA/RS232_TX VCC1.8 PA[4..9] DDC1_SCL DDCA_SCL/rs232_RX PA[4..9] 020A For ID2008 ID2009 C406 C407 0.1uF/16V 0.1uF/16V U402 PB[0..9]...
  • Page 34 120OHM C421 100uF/25V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 836S G3244-G-X-X-6-090105 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 04.Output PCB NAME 715G3244-I <称爹> 称爹 Sunday , May 31, 2009...
  • Page 35 NC/4K7 1/16W 5% U404 can use package 223 or 252. T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 836S 絬 隔 瓜 絪 腹 G3244-G-X-X-6-090105 TPV MODEL Key Component 05.Power PCB NAME 715G3244-I <称爹>...
  • Page 36: Power Board

    6.2 Power Board 715G2892P01019001C R929 100 OHM 1/4W BD901 C916 F801 KBP208G R930 100 OHM 1/4W 0.001uF 0R05 1/4W 5% +14.5V R903 100 OHM 1/4W 2008-11-22 ZD901 R904 MTZJ T-72 16B D901 C918 220 OHM 2W NC/SR5150 1000uF 25V R905 D902 470R 1/10W 5% C937...
  • Page 37 +14.5V C811 470uF 25V R805 CN801 10K 1/10W 5% C814 R803 1uF 25V R816 CONN 0.1uF50V C801 10pF3KV 2K 1/10W 5% 10 OHM +-5% 1/10W R807 T801 RJ805 R811 POWER X'FMR C815 R815 10K 1/10W 5% C802 10K 1/10W 5% C809 0R05 1/4W 5% 0.0033uF/50V...
  • Page 38: Pcb Layout

    7. PCB Layout 7.1 Main Board 715G3244 2...
  • Page 40: Power Board

    7.2 Power Board 715G2892P01019001C...
  • Page 42: Key Board

    7.3 Key Board 715G3371 2 7.4 USB Board 715G3501 3 715G2663 3...
  • Page 43: Maintainability

    8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.
  • Page 44: Trouble Shooting

    8.2 Trouble Shooting 1.No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicate is OK? Replace the converter board Replace main board and check connections Replace key board and check connections...
  • Page 45 2. No Video (Power LED Blue) No Video (Power LED Blue) Press the power Replace the main board button is OK? Replace the converter The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 46 3. DIM DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
  • Page 47 4. Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...
  • Page 48: White-Balance,Luminance Adjustment

    9. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simple 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 .
  • Page 49 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=283±30,y=297±30 4.
  • Page 50: Mechanical Instructions

    10.Mechanical Instructions 1.Put the monitor on the EPE pad. 2.Lay down the monitor, then use cross screwdriver or the expert tools leave off the stand while press the Push area of the back cover. 3.Overturn the monitor and the top towards to us.
  • Page 51 4.Take apart the front frame with hands on the label area. 5.As the center of one side of USB connector, take apart 3 sides and stop. Attention: Do not break off the key pc side, or pull the front frame forcibly, to avoid the keypad peel off. 6.Overturn the monitor, on the USB connector area, one hand press the Panel, and use the other to undrawn the back cover.
  • Page 52 7.Make the notice that the front frame of the key pc side should be separated at last. 8. In turn to take apart the key pc connect PIN (A&B), lamp line (C&D), peel off the aluminum foil (E&F), draw off the FFC pin (G), if there is defect with main pc, need leave of f the six-angle screw (H).
  • Page 53 10. According to the different defective area, take off the screws ABCDE to get the relevant part to maintain. Before take apart the POWER pc should take off the AC iron piece first. 11. Use little screwdriver to peel off the key pc from the front frame when need maintain it.
  • Page 54: Monitor Exploded View

    11.Monitor Exploded View *936*...
  • Page 55: Bom List

    PE BAG FOR MANUAL Q45G 76 28V13 PE BAG Q50G 4 10 TIE (Y1900221) Q52G 1185 99 TAPE Q85G0118101 AOC 936S AC SHIELD E09501 S95G80183H92 HARNESS 30P-30P 140MM USB9HA1 USB BOARD USBAHA5 USB BOARD 0Q1G1040 8120 SCREW 4x8 Q01G6064 1...
  • Page 56 Q34G0560AED 1S0100 AOC-836 stand_front Q34G0561AED 1S0100 AOC-936 stand_rear Q34G0562AED 2S0130 AOC-936 base Q37G0133011 AOC 936S HINGE 756GHACB A1142 MIAN BOARD-CBPCAM5A1H2 SMTCA-U402 100GAMM8020W11 MCU ASS'Y-056G2233501 CN409 033G3802 7B Y CONNECTOR 7P 2.0 CN404 033G3802 9B Y CONN 2.0 9P R480 061G152M22964L SY RST MOFR 2.2 OHM +-5% 2WS FUTABA...
  • Page 57 E09508 095G8014 5DH09 HARNESS 5P(PH)-5P(PLUG) 180MM E09508 095G8014 5TH09 HARNESS 5P(PLUG)-5P(2501) 180MM 2nd source E09508 095G8014 5WH09 HARNESS 5P(PLUG)-5P(2501) 180MM 2nd source SMTUSB9HA4W USB BOARD FOR SMT Q55G 100625 TIN STICK_LOW ARGENTUM C410 067G 2151007RT 105C 10UF M 50V C426 067G 3051014KT EC 100uF 25V PF 6.3x11mm PF C423...
  • Page 58 R414 061G0402103 JF RST CHIPR 10KOHM +-5% 1/16W FENGHUA R408 061G0402103 JF RST CHIPR 10KOHM +-5% 1/16W FENGHUA R407 061G0402103 JF RST CHIPR 10KOHM +-5% 1/16W FENGHUA R118 061G0402103 JF RST CHIPR 10KOHM +-5% 1/16W FENGHUA R436 061G0402104 JF RST CHIPR 100KOHM +-5% 1/16W FENGHUA R468 061G0402201 JF RST CHIPR 200 OHM +-5% 1/16W FENGHUA...
  • Page 59 C108 065G040250931C CAP 0402 5PF 0.25pF 50V NP0 C111 065G040250931C CAP 0402 5PF 0.25pF 50V NP0 FB405 071G 56G151 A CHIP BEAD 150 OHM FB402 071G 56K121 M CHIP BEAD 120OHM 6A MGLB2012-120T-LF FB401 071G 56V301 B CHIP BEAD 0805 300R 25% 700mA FB103 071G 59K190 B CHIP BEAD 0603 19 OHM FCB1608KF-190T05...
  • Page 60 R806 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN R807 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN R808 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN R811 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN R817 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN...
  • Page 61 C806 065G080547332K CAP CHIP 0805 47N 50V X7R +/-10% C927 065G080547332K CAP CHIP 0805 47N 50V X7R +/-10% C916 065G120610272K CAP 1206 1NF 10% 500V X7R C917 065G120610272K CAP 1206 1NF 10% 500V X7R D803 093G 64 38 P BAW56 PW9A21SHD2AI POWER BOARD FOR AI C503...

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