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Acer AT3247 Service Manual

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Acer AT3247 & AT3248
Service Guide
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  Summary of Contents for Acer AT3247

  • Page 1 Acer AT3247 & AT3248 Service Guide...
  • Page 2 Service Guide Version and Revision Version Date Revision History Customer Name TPV Model Name AT3247 E329G2NBWAZE2N Aug.-18-09 Initial release AT3248 E329G2NBWAZF2N...
  • Page 3 Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.
  • Page 4 DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
  • Page 5 Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.
  • Page 6: Table Of Contents

    Table of Contents Monitor Features ……………………………………… General Specifications ……………………………………… LCD TV Description ……………………………………… Precautions And Notices ……………………………………… D-SUB PIN Distribution ……………………………………… Chapter 1 Factory Preset Display Modes ……………………………………… LCD TV Panel Specification ……………………………………… Panel Features ……………………………………… General Specifications ……………………………………… Mechanical Specifications ………………………………………...
  • Page 7: Monitor Features

    Chapter 1 Monitor Features General Specifications...
  • Page 8 782.55 mm 94.5 mm AT3247/48 209.34 mm 449.16 mm...
  • Page 9: Lcd Tv Description

    LCD TV Description The LCD TV will contain a main board (include audio), a switching power board, a function keyboard, an IR Board and a side board. The main board and power board will house the flat panel to control logic I2C bus, DDC, brightness control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD Module to drive the LCD display circuit.
  • Page 10: D-Sub Pin Distribution

    D-SUB PIN Distribution This procedure gives you instructions for installing and using the LCD TV display. (1) Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground.
  • Page 11: Factory Preset Display Modes

    Factory Preset Display Modes: VGA/HDMI Input Signal Reference Chart...
  • Page 12: Lcd Tv Panel Specification

    LCD TV Panel Specification The LC320WXE is a Color Active Matrix Liquid Crystal Display with an integral External Electrode Fluorescent Lamp(EEFL) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally black mode. It has a 31.51 inch diagonally measured active display area with WXGA resolution (768 vertical by 1366 horizontal pixel array).
  • Page 13: Optical Specifications

    Electrical Characteristics Optical Specifications Ta= 25±2°C, VLCD=12.0V, fV=60Hz, Dclk=72.4MHz, IBL=93mArms...
  • Page 14: Connecting Peripherals

    Chapter 2 Connecting Peripherals Front panel controls...
  • Page 15: Remote Control & Osd Operating Instructions

    Chapter 3 Remote Control & OSD Operating instructions Using the Remote Control 5 e (Empowering Technology) Press to activate Acer Empowering Technology. 6 MENU Press to open or close the Menu. 7 Back Press to back to previous Menu. 8 Directional keys/OK...
  • Page 16 Teletext 1 Color buttons (R/G/Y/B) Operates corresponding button on the teletext page. 2 INDEX Press to go to the index page. 3 SUBTITLE Press to view subtitles on the screen. 4 REVEAL Press to reveal hidden teletext information. 5 SUBPAGE Press to access the teletext’s subpages directly.
  • Page 17: Using The Osd Menus

    Using the OSD Menus...
  • Page 25: Logo

    Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. How to Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
  • Page 26: Chapter 4 Machine Disassembly

    Chapter 4 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance. The tools listed as below are that we may use during this procedure: 1. A proper screwdriver 2. A pair of glove 3. A pliers 4.
  • Page 27 Disassemble the back cover 1. Remove 11 screws to remove back cover. 2. Pry the monitor up then find out the hooks’ position, use the tool (like the picture or other card) to insert into the gap of bezel and rear cover.
  • Page 28 3.Turn over the monitor and take off the rear cover.
  • Page 29 Disassemble the speakers. to r Remove the 2 screws marked in red and disconnected the connector remark in green emove the speakers Key board Main board Power board The speakers Remove the key board. Disconnected the connector remark in green to remove the key board.
  • Page 30 Remove the main board, power board. 1.Remove the 5 screws marked in red and disconnected the connector remark in green to remover the main board. 2.Remove the 6 screws marked in red and disconnected the connector remark in green to remove the main board...
  • Page 31 Remove the bezel. 1.Remove the 12 screws marked in red to remove the BKT.
  • Page 32 Remove the IR board. Remove the 2 screws marked in red . The panel...
  • Page 33: Chapter 5 Trouble Shooting

    Chapter 5 Trouble Shooting No picture (LED orange) No picture Check key board/IR board Change key board/IR board Check 24V power supply Check the power supply circuit Check main board Standby power supply Change U152 Check U400 Change U400 Check I C bus Check I C communication...
  • Page 34 Abnormal display Reset source Check the source Check signal filter circuit Replace the filter or resistance RF signal Check TV system setup Check input Check LVDS cable Replace LVDS cable Check Tuner Check panel Replace panel Replace Tuner No sound Reset source Check the source Check if mute...
  • Page 35 No Power (No LED indicator) Plug in power cord and interface Check power cord and board interface Replace F901 or BD901 or C907 Check F901, BD901, C907 Check IC903, Q903 Replace IC903 or Q903 Replace T901 Check T901 Check D950, C953, C954 Replace D950 or C953 or C954...
  • Page 36 Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Is Key Pad Board Normally? Replace Key Pad Board Check Main Board...
  • Page 37: Chapter 6 Upgrade Firmware

    Chapter 6 Upgrade Firmware 1.U390 FW update We must update U390 first, because the U390 firmware is the base of the system. When we update U390,the soft tool is MTK Tool, the hardware tool is 715T080-A To PC To TV 3 pin Software tool Version : mtk_tool-2.47.02.12_2 Hardware tool...
  • Page 38 Step 3: After we click upgrade, there will be a small window, we must select Flash Type. The correct type is NOR , Click OK . Step 4 :When we see this picture, show program OK ,then AC ON/OFF, program finished. 2.
  • Page 39: Chapter 7 White-Balance, Luminance Adjustment

    Chapter 7 White-Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. YPbPr Mode display adjustment White balance adjustment (B) General set-up : Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer Quantum Data Pattern Generator 802G , 802BT or equivalent instrument Input requirements: Input Signal Type : YPbPr signal 1.
  • Page 40 Color temperature Standard/Warm/Cold (x, y) co-ordinates specification: Picture Mode Normal (10000 0.281±0.005 0.288±0.005 Warm (8000 0.295±0.005 0.305±0.005 Cold (13000 0.269±0.005 0.274±0.005 Table: Reading with Minolta CA-110. Note: 1. Use Minolta CA-110 for color coordinates and luminance check. 2. Luminance > 400 cd/m in the center of the screen when Brightness control at 100;...
  • Page 41: Fru (Field Replaceable Unit) List

    Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines.
  • Page 42 Item TPV Part No. Description Acer Part No. Q`ty Q36T 809 1 SPEAKER GRILL A33T0400 1B1C0100 DECO_BEZEL FOR 32" P33T0115 1A1P0100 SMILE-LENS-ACER A34T0517AGEBMM0500 BEZEL TV32W-8ACER 60.MA60B.002 IRPF9QAH IR BOARD A34T0754 GMA1L0119 COVER_FUNC A33T0386AEPA1M0100 BUTTON_FUNC KEPF9QAE KEY BOARD 55.MA60B.003 A15T0845201 BKT-PANEL-SUPPORT-BR...
  • Page 43 Description Picture TPV Part No. Acer Part No. Bezel A34T0517AGEBMM0500 60.MA60B.002 Panel 750TVG320EBC12N000 LK.32008.001 Rear Cover A34T0518 GM IL0130 60.MA60B.001 Hinge Ass'y Q37T0078011AEP 42.M680B.001 Base A34T0521AEP 1M0220 60.M680B.009...
  • Page 44 Power PWTV9NE1AB8 55.MA60B.002 Board Main Board CBPF92KBQHS 55.MA60B.001 (AT3247) Main Board CBPF92LBQ9S 55.MA70B.001 (AT3248) Speaker 078T 495903 M 23.M680B.002 LVDS Cable 095G8018 30984 IR board IRPF9QAH...
  • Page 45 Key Board KEPF9QAE 55.MA60B.003 Remote 098TR7BDYNTARD 25.M860B.001 Control Power Cord 089G404A18N IS 27.L40VB.005...
  • Page 46: Edid Data

    EDID Data DDC DATA for For D-SUB Input ********************************************************************** 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F ----------------------------------------------- 00| 00 FF FF FF FF FF FF 00 04 72 48 32 01 01 01 01 10| 00 13 01 03 68 46 27 78 2A F9 6B A2 55 4A 9A 25 20| 0F 47 4A BF 6E 00 81 C0 81 00 01 01 01 01 01 01 30| 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F...
  • Page 47: Chapter 9 Pcb Layout

    Chapter 9 PCB Layout Main Board Layout...
  • Page 49 Power Board...
  • Page 50 Key Board IR board...
  • Page 51: Chapter 10 Schematic Diagram

    Chapter 10 Schematic Diagram Main Board EU MT5362 - 4 LAYERS STB_PWR5V +5V_STB FB100 220R/2000mA +24V +24V +5V_STB +5V_SW +12V 2,9,13 +12V DC POWER INPUT FB101 220R/2000mA +5V_STB 2,5,10,13 +5V_STB BRIGHT_ADJ: +5V_SW 2,5,8,9,10,11,12,13,14 +5V_SW C107 C106 +5V1_TUN Normal:Max:+3V3, Min:0V +5V1_TUN 470uF 10V 100N 16V Q104...
  • Page 52 Panel VCC=5V +24V 1,13 +24V L150 NEARLY U155 +12V 1,9,13 +12V +12V PANEL5V +5V_STB 1,5,10,13 +5V_STB DV18_DDR DV18_DDR R176 C165 L150 NC/15uH +5V_SW 1,5,8,9,10,11,12,13,14 +5V_SW NC/0R05 1/8W U155 NC/220N 25V C171 C154 NC/SC4525BSETRT NC/220uF 16V +5V_TUNER +5V_TUNER D150 NC/BAS32L NC/10U 10V Y 5V +5V1_TUN +5V1_TUN DV33...
  • Page 53 +5V_T +5V_T +5V_T +5V_TUNER FB203 FB204 FB201 +5V_T2 +5V_T3 120R/500mA 120R/500mA 220R/2000mA C215 C216 C217 C218 C201 C202 100uF 10V U400B 100N 16V 10U 10V 100N 16V 10U 10V 100N 16V AV33 2,5,10,11,12,13,14 AV33 AA22 AVSS33_DIG +5V_TUNER AVSS33_DIG +5V_TUNER Y 23 AVDD33_DIG R234 AV25...
  • Page 54 1,2,3,5,6,7,8,9,10,11,12,13,14 DV33SB 2,5,7,10,12,13,14 DV33SB DV33 DV33 1,2,5,7,8,11,12,13,14 DV33 U400F DV11 DV11 VCC3IO AOBCK VCC3IO AOBCK AOLRCK DVSS AOLRCK DVSS OPWM0 DVSS OPWM0 DVSS OPWM1 DVSS OPWM1 DVSS OPWM2 DVSS OPWM2 DVSS OPCTRL3 DVSS OPCTRL3 DV33 OPCTRL4 DVSS OPCTRL4 OPCTRL5 DVSS OPCTRL5 DVSS PDD0...
  • Page 55 1,2,3,4,6,7,8,9,10,11,12,13,14 U400I NEAR IC NEAR IC AV12 2,6,10,12,14 AV12 JRTCK TP301 AV12 FB323 AV33 FB322 AV33 JRTCK 2,3,10,11,12,13,14 AV33 OPWM2 OPWM2 JTDI NEAR IC AVDD12_USB USB_VRT R331 AVDD33_USB JTDI JTCK DV33SB 120R/500mA 5K1 1/10W 1% 120R/500mA DV33 JTCK 1,2,4,7,8,11,12,13,14 DV33 OPWM1 DV33SB OPWM1...
  • Page 56 U400D U351 U352 1,2,3,4,5,7,8,9,10,11,12,13,14 RDQS0 RA12 RDQS0 RA12 RDQS0# RA11 RDQ0 MRA0 RDQ16 MRA0 DV18_DDR RDQS0_ RA11 DV18_DDR RDQM0 RA10 RDQ1 MRA1 RDQ17 MRA1 MEM_VREF RDQM0 RA10 MEM_VREF RDQ0 RDQ2 MRA2 RDQ18 MRA2 AV12 RDQ0 2,5,10,12,14 AV12 RDQ1 RDQ3 MRA3 RDQ19 MRA3 RDQ1...
  • Page 57 1,2,3,4,5,6,8,9,10,11,12,13,14 Del U392 512KB Nor Flash for Boot Code DV33 +5V_STB (11/27 1,2,5,10,13 +5V_STB DV33SB U390 Benson) 2,4,5,10,12,13,14 DV33SB DV33 DV33 1,2,4,5,8,11,12,13,14 DV33 POCE0# KEY _MENU_L_R_SOURCE KEY _MENU_L_R_SOURCE GPIO_14 R366 NC/0R05 1/16W DV33 LED_G HOLD# LED_G PDD0 FRESET# R373 NC/0R05 1/16W GPIO_16 LED_R LED_R...
  • Page 58 1,2,3,4,5,6,7,9,10,11,12,13,14 CLOSE TO CI CONNECTOR CLOSE TO CI CONNECTOR +5V_SW 1,2,5,9,10,11,12,13,14 +5V_SW TH400 DV33 1,2,4,5,7,11,12,13,14 DV33 CI_VCC CI_VCC +5V_SW +5V_SW CI_DV33 CI_DV33 PTCR DV18_CI DV18_CI FB405 NC/220R/200mA +5V_SW R401 R402 R406 R408 R436 R435 CI_VCC CI_VPP 10K 1/10W 5% NC/10K 1/10W 5% 10K 1/10W 5% 10K 1/10W 5% 4K7 1/10W 5%...
  • Page 59 SCT2_AUR_OUT# SCT2_AUR_OUT# SCT2_AUL_OUT# SCT2_AUL_OUT# TV SCART CVBS BYPASS MUX SC2_LIN SC2_LIN SC2_RIN SC2_RIN FB500 +5V_SW MONITOR SCART CVBS BYPASS SCT1_AUR_OUT# SCT1_AUR_OUT# MUX SELECT TV_BYPASS_SEL SCT1_AUL_OUT# SCT1_AUL_OUT# +5V_MUX +5V_MUX ATV_CVBS_BYPASS SC1_RIN SC1_RIN C501 120R/500mA C500 SC1_LIN SC1_LIN DTV_CVBS_BYPASS 1uF 16V 10uF/10V NEARLY IC NEARLY CONNECTOR R509...
  • Page 60 U400E AV12 AV12 AB24 CVBS0P L550 L551 AV1_RIN CVBS0P AV1_RIN AC24 SIDE_CVBS_IN AVDD12_RGB DVDD12_RGB AV1_LIN CVBS1P AV1_LIN AC25 CVBS0N CVBS0N AD25 SIDE_C_IN 0U10 H C551 0U10 H C554 VGA_RIN CVBS3P VGA_RIN AD26 SIDE_Y _IN C552 C553 C566 C555 C550 C578 VGA_LIN CVBS2P VGA_LIN...
  • Page 61 U400J SIDE_LIN SIDE_LIN SIDE_RIN SIDE_RIN AVSS33_VDAC AVSS33_VDAC AVSS33_VDAC SIDE_CVBS_IN AVSS33_VDAC_BG SIDE_CVBS_IN NEAR AV CONNECTOR NEAR MT5362 AVDD33_VDAC R692 SIDE_C_IN AVDD33_VDAC SIDE_C_IN AVDD33_VDAC 560R 1/16W 1% SIDE_Y _IN AVDD33_VDAC_BG SIDE_Y _IN DACOUT2 SMD/0402 D650 VDAC_OUT2 DACOUT1 VDAC_OUT1 +5V_SW 1,2,3,4,5,6,7,8,9,10,12,13,14 AB23 CVBS_BY PS1 TP650 CVBS_BY PASS1 AC23...
  • Page 62 RX2_2+ L751 NC/90 ohm RX2_2+ 1,2,3,4,5,6,7,8,9,10,11,13,14 RX2_2- RX2_2- U400H RX2_1+ L752 NC/90 ohm RX2_1+ TP421 +5V_SW ALIN 1,2,5,8,9,10,11,13,14 +5V_SW ASPDIF RX2_1- RX2_1- ASPDIF DV33SB AVDD12_CVCC AV12 AVDD12_HDMI RX2_0+ 2,5,6,10,14 AV12 AB12 HDMI2_SDA L753 NC/90 ohm RX2_0+ AV33 HDMI_SDA2 2,3,5,10,11,13,14 AV33 AC12 HDMI2_SCL NEAR IC...
  • Page 63 U400A +5V_SW 1,2,5,8,9,10,11,12,14 +5V_SW ADCOUTR Near IC Near MT8292 AV33 FB608 8292_V33 AIN_R ADCOUTL C723 10uF/10V INPUT2R +12V AIN_L 1,2,9 +12V AVSS33_AADC R698 10uF/10V 10uF/10V +24V AVSS33_AADC +24V REFN_AADC ADCOUTR 0R05 1/10W 5% C616 ADCOUTR_8292 AR0O C657 R680 C724 10uF/10V INPUT2L 120R/500mA AVSS33_REFN_AADC...
  • Page 64 PANEL_VCC FB751 220R/2000mA AV12 2,5,6,10,12 AV12 Panel_12V AV33 2,3,5,10,11,12,13 AV33 Samsung FB752 PANEL_VCC PANEL_VCC LG 32"/37" 220R/2000mA +5V_SW PANEL 26" 1,2,5,8,9,10,11,12,13 +5V_SW DV33 DV33 1,2,4,5,7,8,11,12,13 DV33 FB753 1,2,3,4,5,6,7,8,9,10,11,12,13 R755 220R/2000mA R755 R754 NEAR CN750 C752 C751 CN750 100UF/25V 100N 16V BL_DIM BL_DIM R754...
  • Page 65 Power board D904 B+_390V 1N5408-E3/73 R940 T901 R949 C930 100K 1W 1% POWER X'FMR FB903 FB901 D902 0.1 ohm 2200pF R950 FMN-1106S Modify C911 to 1K103 47 OHM 1/4W 2E6213 for version B BEAD BEAD R948 R952 C950 L906 0.1 ohm 1000pF C911 47 OHM 1/4W...
  • Page 66 B+_390V CN801 CONN C801 3pF/6KV C803 2.2uF 25V X7R T802 C802 D801 POWER X'FMR Q803 1uF/450V FQPF12N60C R801 C804 82K 1/8W 330P 50V SCS0520P D802 T801 SCS0520P R802 R806 100 OHM +-5% 1/8W R831 R803 R804 R805 15KOHM +-5% 1/8W 10K OHM 1/4W +-5% 56 OHM +-5% 1/4W 56 OHM +-5% 1/4W...
  • Page 67 Key board VOL+ VOL- 2.44V 1.04V 0.35V 1.73V R002 R004 R001 R003 C001 4.3KOHM +-1% 1/10W 470 OHM +-1% 1/10W 11K OHM 1% 1/10W 1.8K OHM 1% 1/10W 0.1uF/25V SW001 SW002 SW003 SW004 CN001 KEY1 KEY2 CONN MENU INPUT POWER 2.44V 1.73V 1.04V...
  • Page 68 IR board +5V_STB R202 R203 R201 27OHM 1/10W 27OHM 1/10W 220 OHM +-5% 1/10W LED202 LED203 LED201 19-21B/Y C-AL1M2VY /3T R204 R205 CN016 Q202 100R 1/10W 5% 100R 1/10W 5% Q203 C016 BC847C BC847C C017 R206 C018 2K2 1/10W 5% Q201 C019 BC847C...

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At3248