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Acer AT2055 Service Manual

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Acer AT2055 & AT2056
Service Guide
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Summary of Contents for Acer AT2055

  • Page 1 Acer AT2055 & AT2056 Service Guide...
  • Page 2 Service Guide Version and Revision Version Date Revision History Customer Name TPV Model Name AT2055 E209S2NBBWZ3NC Jul.-03-09 Initial release AT2056 E209S2NBBWZ4NC...
  • 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 / HDMI Digital connector ……………………………………… Chapter 1 Factory Preset Display Modes ……………………………………… LCD TV Panel Specification ……………………………………… Panel Features ……………………………………… General Specifications ………………………………………...

  • Page 7: Monitor Features

    Chapter 1 Monitor Features General Specifications...
  • Page 8 502.4mm 74.0mm AT2055/56 189.2mm 239.2mm...

  • Page 9: Lcd Tv Description

    LCD TV Description The LCD TV will contain a main board, a power board a function keyboard and an IR board. The main board and power board will house the flat panel to control logic I C 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 / Hdmi Digital Connector

    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: Chapter 1 Factory Preset Display Modes

    Factory Preset Display Modes:...

  • Page 12: Lcd Tv Panel Specification

    LCD TV Panel Specification LTM200KT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit.

  • Page 13: Optical Specifications

    Optical Specifications (Ta = 25 ± 2°C, VDD=5V, fv= 60Hz, fDCLK=69.3MHz, IL = 7.5mArms)

  • Page 14: Connecting Peripherals

    Chapter 2 Connecting Peripherals Front panel controls...

  • Page 15: Remote Control & Osd Operating Instructions

    Remote Control & OSD Operating instructions Chapter 3 Using the Remote Control 5 e (Empowering Technology) Press to activate Acer Empowering Technology. See page 18. 6 MENU Press to open or close the Menu. 7 Back Press to back to previous Menu.
  • Page 16 Teletext 1 Colour 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 teltext information. 5 SUBPAGE Press to access the teletext’s subpages directly.

  • Page 17: Using The Osd Menus

    Using the OSD Menus...
  • Page 24 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 25: 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 26 (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 27 (3)Turn over the monitor and take off the rear cover. Remove the base...
  • Page 28 The base Remove the speakers (1) Remove the four screws marked in red to remove the speakers. (2) Remove the four screws marked in red.
  • Page 29 Remove the key board and IR board. key board IR board Disassemble the boards. (1)Remove the eleven screws marked in red to remove the speakers. (2)Release all the connecting wires marked in blue for these boards.
  • Page 30 Remove the main frame Remove the six screws marked in red to remove the main frame.
  • Page 31 Disconnect the LVDS cable Disassemble the front panel...

  • Page 32: 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 U401 Change U401 Check I C bus Check I C communication...
  • Page 33 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 Check Tuner Replace LVDS cable Check panel Replace panel Replace Tuner...
  • Page 34 No sound Reset source Check the source Check if mute Check TV Reset TV system Check input signal TV SIF system Change TU201 Check U401 Check TU201 Change U401 Check U601 Change U600 Check speaker Change speaker...
  • Page 35 No Power (No LED indicator) Check CN902 pin10, 11 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901 Check R904, R905 and Change IC901 Check the auxiliary voltage is bigger than 10V and smaller than 20V...
  • Page 36 W / LED, No Backlight Check 12V input Check adapter or MB Check ON/OFF Check Interface board Check IC801 Change ON/OFF Check IC801 PIN1.15 have the output of square wave at short time Change IC801 Check the input of Q805, Q806 Change Q805, Q806,D801,D802,D803,Q804 Check the output of PT802 Change PT802...
  • Page 37 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 38: Chapter 6 Upgrade Firmware

    Upgrade Firmware Chapter 6 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 39 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 40 3. U301 FW update When we update u301, we use software tool is NVM_Tool, the hardware tool is 715T080-A. To PC To TV 3 pin Hardware tool Part NO. : 715T080-A Step 1: select the correct port . for example, this time we select COM4 Step 2:click test port , if the port is correct , then we can see the below information.
  • Page 41 Step 5: click Read from BIN file, and load the FW file, click “open” Step 6: click Write to EEPROM, then the data are writing to EEPROM. Until it is Finished, It will we show” Write and confirm OK”, you must AC OFF/ONN for restart the TV SET...

  • Page 42: 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. It’s no need to adjust the white balance for this model. 1. Enter into the factory mode: Turn on the TV, press MENU key with remote control, then press number key 1 9.
  • Page 43 Item 16 for color temp select. Item 17/item 18/item 19 Gain for Red, Green and Blue gain tuning, those values will available for All input and All picture mode. The adjust range is 0 ~ 255. Item 20/item 21/item 22 Offset for Red, Green and Blue offset tuning, those values will available for all input and All picture mode.

  • Page 44: 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.
  • Page 45 Item Description TPV Part No. ACER Part No. Q`ty BEZEL 20" A34T1342AEO 1M0128 60.MA00B.001 ACER LOGO A23G0002 1 B LED BOARD IRPF9QA9 55.MA00B.003 LED BACKLIGHT A33T0690BEC 1L0100 PANEL 750TVS200KT1BCN0AC LK.20006.014 MAINFRAME SAMSUNG A15T0812101 60.MA00B.005 SCREW(MF TO PANEL) 0M1G 130 6 47 CR3...
  • Page 46 Part List Above picture show the description of the following component. Description Picture TPV Part NO. Acer Part NO. Bezel A34T1342AEO 1M0128 60.MA00B.001 Main Frame A15T0812101 60.MA00B.005 Panel 750TVS200KT1BCN0AC LK.20006.014 Rear Cover A34T1343AEMA1L0100 60.MA00B.002...
  • Page 47 STAND 705TQ934A14 ASS'Y Power PWTV8A41EABL 55.MA00B.002 Board Main Board CBPF92LBQ7 55.MA00B.001 078G0055 2 GL/ 23.M990B.001 Speaker 078G0055 2 GR /23.M990B.002 FFC Cable 089G179E30N 35 50.MA00B.001...
  • Page 48 LED Board IRPF9QA9 55.MA00B.003 IR board IRPF9QA8 55.M990B.003 Key Board KEPF9QA7 55.M990B.004 Remote 098TR7BDYNTARD Control Power Cord 089G404A18N IS 27.L40VB.005 Cover A33T1344AEM 1L0100 60.MA00B.006 Stand...

  • Page 49: Edid Data

    EDID Data DDC DATA 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 55 20 01 01 01 01 10| 00 13 01 03 68 28 1E 78 2A 8E 60 A5 55 44 99 24 20| 12 49 4B BF EE 00 71 4F 81 C0 81 00 01 01 01 01 30| 01 01 01 01 01 01 31 2E 40 00 62 84 22 30 58 A8...

  • Page 50: Chapter 9 Pcb Layout

    Chapter 9 PCB Layout Main Board...
  • Page 53 Power Board...
  • Page 54 Key Board IR board...
  • Page 55 LED Board...

  • Page 56: Chapter 10 Schematic Diagram

    Chapter 10 Schematic Diagram Main Board EU DTV SMALL MT5362 - 4 LAYERS OPWRSB OPWRSB STAND_BY STAND_BY BRIGHT_ADJ BRIGHT_ADJ INVERTER_ON_OFF INVERTER_ON_OFF MEM_VREF MEM_VREF +18V_A 3,10,14 +18V_A +18V +18V_A R129 NC/0 OHM +-5% 1/4W +5V_STB +5V_SW FB100 120R/3000mA +5V_STB DC POWER INPUT Q105 FB101 120R/3000mA...
  • Page 57 Add Thermal Pad Add Thermal Pad Add Thermal Pad PANEL_VCC_ON/OFF PANEL_VCC_ON/OFF OPWRSB OPWRSB +5V_STB DV33SB +5V_SW AV25 +18V_A U153 2,10,14 +18V_A AV25 AV12 U154 +5V_SW AV33 LD1117ADT-TR U152 U151 VIN VOUT VOUT AME8810-AEGTZ 0.6A/3.3V LD1117ADT33TR C164 VOUT(heat sink) C169 C161 100N 16V C162 VOUT...
  • Page 58 +5V_T +5V_T +5V_T +5V_T +5V_TUNER ATV_MUX_IN ATV_MUX_IN FB203 FB204 FB205 FB201 ATV_CVBS_OUT ATV_CVBS_OUT CVBS0P CVBS0P +5V_T2 +5V_T3 +5V_T4 CVBS0N CVBS0N SCT1_AV_OUT SCT1_AV_OUT NC/120R/500mA 120R/500mA NC/120R/500mA 220R/2000mA SCT1_AVO_GND SCT1_AVO_GND C215 C216 C217 C218 C219 C220 C201 C202 U400B NC/100N 16V NC/10U 10V 100N 16V 10U 10V NC/100N 16V...
  • Page 59 AOBCK AOBCK AOLRCK AOLRCK OPWM0 OPWM0 DV33 U400F MT5362BMG/B OPWM1 OPWM1 VCC3IO OPWM2 VCC3IO OPWM2 DVSS OPCTRL3 DVSS OPCTRL3 OPCTRL4 DVSS OPCTRL4 OPCTRL5 DVSS OPCTRL5 DVSS PDD0 DVSS PDD0 PDD1 DVSS PDD1 PDD2 DVSS PDD2 PDD3 DVSS PDD3 DV33 PDD4 DVSS PDD4 PDD5...
  • Page 60 CE#_CI CE#_CI RESET_CI RESET_CI U400I NEAR IC NEAR IC INT_CI INT_CI JRTCK TP301 AV12 FB323 AV33 FB322 JRTCK OPWM2 R331 OPWM2 JTDI NEAR IC AVDD12_USB USB_VRT AVDD33_USB OPWRSB JTDI OPWRSB JTCK DV33SB 120R/500mA 5K1 1/10W 1% 120R/500mA JTCK OPWM1 OPWM1 OPWM0 AVDD33_XTAL C326...
  • Page 61 U400D DV18_DDR DV18_DDR RDQS0 RA12 RDQS0 RA12 RDQS0# RA11 RDQS0_ RA11 RDQM0 RA10 RDQM0 RA10 RDQ0 U351 U352 RDQ0 RDQ1 RDQ1 RDQ2 RDQ2 RDQ3 MEM_VREF RDQ3 MEM_VREF RDQ4 RDQ4 RDQ5 MRA0 MEM_VREF MRA0 MEM_VREF RDQ5 VREF VREF RDQ6 MRA1 MRA1 RDQ6 RDQ7 MRA2...
  • Page 62 KEY _MENU_L_R_SOURCE KEY _MENU_L_R_SOURCE DV33 32MB Nand Flash 512KB Nor Flash for Boot Code DV33 LED_G LED_G LED_R U390 LED_R KEY _UP_DN_DCSW U391 KEY_UP_DN_DCSW POCE0# U0TX 6,11 U0TX GPIO_14 R366 NC/0R05 1/16W DV33 U0RX NC28 HOLD 6,11 U0RX R371 PDD0 FRESET# R373 NC/0R05 1/16W GPIO_16...
  • Page 63 CLOSE TO CI CONNECTOR CLOSE TO CI CONNECTOR TH400 CI_VCC CI_VCC +5V_SW +5V_SW CI_DV33 CI_DV33 FB405 NC/220R/200mA NC/PTCR +5V_SW R401 R402 R406 R408 R436 R435 FB404 CI_VCC CI_VPP 10KOHM +-5% 1/10W NC/10K 1/10W 5% 10KOHM +-5% 1/10W 10KOHM +-5% 1/10W 4.7KOHM +-5% 1/10W 4.7KOHM +-5% 1/10W Q400...
  • Page 64 TV SCART CVBS BYPASS MUX +18V_A 2,3,14 +18V_A D506 NC/BAS316 SC1_RIN SC1_RIN SC1_LIN +5V_SW SC1_LIN FB500 +5V_TUNER MUX SELECT TV_BYPASS_SEL C512 10U 10V R523 SC1_Y _CVBS_IN SC1_Y _CVBS_IN +5V_MUX +5V_MUX SCT1_AUR_IN SC1_RIN TV_BY PASS_SEL TV_BY PASS_SEL ATV_CVBS_BYPASS 27K 1/16W 5% ADIN1 ADIN1 C501...
  • Page 65 U400E AV12 L550 AV12 AB24 CVBS0P 0U10 H L5510U10 H CVBS0P AC24 SIDE_CVBS_IN AVDD12_RGB DVDD12_RGB AV1_RIN CVBS1P AV1_RIN AC25 CVBS0N AV1_LIN CVBS0N AV1_LIN AD25 SIDE_C_IN VGA_RIN CVBS3P VGA_RIN AD26 SIDE_Y_IN C552 C551 C553 C566 C555 C554 C550 C578 VGA_LIN CVBS2P VGA_LIN AB22 AVSS33_CVBS...
  • Page 66 SIDE_LIN SIDE_LIN SIDE_RIN SIDE_RIN U400J SIDE_CVBS_IN SIDE_CVBS_IN AVSS33_VDAC SIDE_C_IN AVSS33_VDAC SIDE_C_IN AVSS33_VDAC SIDE_Y _IN AVSS33_VDAC_BG SIDE_Y _IN AVDD33_VDAC R699 ASPDIF AVDD33_VDAC ASPDIF AVDD33_VDAC 560R 1/16W 1% AVDD33_VDAC_BG DACOUT2 SMD/0402 SC2_Y _CVBS_IN VDAC_OUT2 SC2_Y _CVBS_IN DACOUT1 SC2_C_IN VDAC_OUT1 SC2_C_IN AB23 CVBS_BY PS1 TP602 CVBS_BY PASS1 AC23...
  • Page 67 EDID_WEN 6,11 EDID_WEN HPD0 HPD0 HPD1 HPD1 U400H R703 NC/0R05 1/16W ASPDIF ASPDIF SPDIF_D SPDIF_D ALIN SPDIF_D ASPDIF SMD/0402 ASPDIF DV33SB AVDD12_CVCC AVDD12_HDMI AB12 HDMI_SDA2 AC12 NEAR IC HDMI_SCL2 AD12 PWR5V_2 AC13 HDMI_CEC AV33 L700 HDMI_CEC AC14 HDMI1_SDA AVDD33_H HDMI_SDA1 AD14 R702 OPWR1_5V...
  • Page 68 SC2_RIN SC2_RIN SC2_LIN SC2_LIN AV1_RIN AV1_RIN AV1_LIN AV1_LIN SIDE_RIN SIDE_RIN SIDE_LIN SIDE_LIN SC1_RIN SC1_RIN U400A SC1_LIN SC1_LIN ADCOUTR Near IC Near MT8292 AV33 FB608 8292_V33 VGA_RIN AIN_R VGA_RIN ADCOUTL C723 10U 10V INPUT2R VGA_LIN AIN_L VGA_LIN AVSS33_AADC R698 10U 10V 10U 10V AVSS33_AADC REFN_AADC...
  • Page 69 BL_DIM BL_DIM INVERTER_SW INVERTER_SW BRIGHT_ADJ BRIGHT_ADJ INVERTER_ON_OFF INVERTER_ON_OFF TP752 U400G TP762 Single Signal Dual signal Dual signal Single Signal AVDD12_LVDS AVDD12_LVDS CONN NC/CONN A0N# A4N# LVDS AVDD33_LVDS AVDD33_LVDSA Click 19&22 AVDD33_LVDS TP753 Connector AVDD33_LVDSB A0P# A4P# PnS 22" A0N# PnS 19" A0P# TP763 A1N#...
  • Page 70 Power board R9 18 1 00R 1/4W C92 1 F902 0 .0 01uF R919 +12V T 901 1 00R 1 /4 W L904 Ju m per POWER X 'FM R 3.5 uH ZD92 0 R9 40 RLZ1 3B 8 0T L 19T 3 3 N R92 0 C917 C918...
  • Page 71 PT 802 CN801 POWER X'FM R CONN C819 56pF/3KV R805 +12V 100R 1/10W C820 CN802 D801 56pF/3KV CONN LL4148 Q805 PT 801 ON/OFF AO4616 R806 100R 1/10W L801 ZD802 RLZ5.6B C816 27pF/6KV D802 57T 600517 R804 R803 ZD803 LL4148 C824 5K1 1/10W RLZ5.6B 27pF/6KV...
  • Page 72 1.8K OHM 1% 1/10W 0.1uF/25V SW005 SW006 SW007 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Acer 715G3520-A-X-X-1-090115 TPV MODEL 絬 隔 瓜 絪 腹 AT2355 Key Component 02. KEY PAD PCB NAME 715G3520-A <称爹> 称爹...
  • Page 73 IR board DV33SB KSM-603TM2E U001 CN001 R003 VOUT 33R 1/10W 5% R004 100R 1/10W 5% R005 CONN 10K 1/10W 5% C001 C002 C003 100pF/50V 0.1uF 50V 10uF/10V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL AT2355 Size 715T3520-B-X-X-1-090310...
  • Page 74 DV33SB DV33SB LED1 LED2 R004 R003 R006 R005 47 OHM +-5% 1/10W 47 OHM +-5% 1/10W 160 OHM +-5% 1/10W 160 OHM +-5% 1/10W R001 2.2KOHM +-5% 1/10W DV33SB Q001 BC847C CN001 Bule R002 2.2KOHM +-5% 1/10W Q002 BC847C Orange CONN T P V ( Top Victory...

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