Acer AL718 Service Manual
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Acer AL718 Service Manual

Acer AL718 Service Manual

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Acer AL718 Service Guide

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Summary of Contents for Acer AL718

  • Page 1 Acer AL718 Service Guide...

  • Page 2: Table Of Contents

    4. THEORY OF OPERATION 5. EXPLORED DRAWING & DISASSEMBLY INSTRUCTIONS 6. CONTROL LOCATION 7. NECESSARY EQUIPMENT LIST 8. BLOCK DIAGRAM 9. CONDUCTOR VIEW 10. SCHEMATIC DIAGRAM 11. TROUBLE SHOOTING HINTS 12. BOM LIST 13. REPLACEMENT PARTS 14. SPARE PARTS LIST AL718...

  • Page 3: Warning

    Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt within this service information by anyone else could result in serious injury or death. AL718...

  • Page 4: Safety Precautions

    1500 ohm resistor and 0.15uF capacitor. 4-4 Move the resistor connection to each exposed metallic part and measure the voltage. 4-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement. AL718...

  • Page 5: Dimensions

    1. DIMENSIONS 1.1 Front View : unit : mm 1.2 Real View : unit : mm AL718...
  • Page 6 1.3 Top View : unit : mm 1.4 Side View : unit : mm AL718...

  • Page 7: General Information

    The product has 26 memory mode in total . 16 modes are preset and 10 modes are user definable. 2.7 Fine dot pitch LCD panel with a fine dot pitch ( Horizontal : 0.264 mm / Vertical : 0.264 mm) AL718...

  • Page 8: Specifications

    < 20 ms (Tr+Tf) + 5V (for DDC) View angle 75/75/65/60 degrees Sync GND Color coordinate x=0.313,y=0.329 None DDC Data 4. CONNECTORS Horizontal Sync 4.1 AC power cord : CEE22 typed connector 4.2 Audio cable Vertical Sync DDC Clock AL718...
  • Page 9 H/V Separate : TTL level this LCD display can automatically function with 5.5.3 Input impedance a certain position. Horizontal: Sync frequency : 30~81 kHz Video input : 75 ohms Vertical : Sync frequency : 56~75Hz Sync input : > 1 k ohms AL718...
  • Page 10 Contrast : Maximum B: Full white pattern > 50,000 hours (demonstrated MTBF) Brightness : min 11.2 MTBF for LCD A: Full black pattern The brightness is still more than 50% of the Brightness : max original brightness after 30,000 hours (min.) AL718...

  • Page 11: Theory Of Operation

    On-Chip Microcontroller (OCM) The gm2120 on-chip microcontroller(OCM) serves as the system microcontroller.That is , it programs the gm2120 and manages other devices in the system such as the keypad, the backlight, LED, audio and non-volatile RAM.using general purpose input/output (GPIO) pins. AL718...
  • Page 12 LVDS link. At a transmit clock frequency of 85 MHz, 24 bits of RGB data and 3 bits of LCD timing and control data ( FPLINE, FPFRAME, DRDY) are transmitted at rate of 595 Mbps per LVDS data channel. U1 AS the ODD pixel transmitter , U2 as the EVEN pixel transmitter. AL718...
  • Page 13 Pin 4 ---------> GND Pin 5 ---------> Vdc Output ( 2.5V +/- 5%) Pin 6 ---------> GND Pin 7 ---------> On /Off ( "High" set Lamp on ) Pin 8 ---------> NA Pin 9 ---------> Brightness Voltage Pin 10 --------> Audio Volume AL718...
  • Page 14 Pin 2 ---------> Speaker left2 Pin 3 ---------> Speaker right1 Pin 4 ---------> Speaker right2 CN201 ~ CN204 ; Pin 1 ---------> HV ( High Voltage for CCFL ) Pin 2 ---------> Return ( Low Voltage for CCFL ) AL718...

  • Page 15: Explored Drawing & Disassembly Instructions

    5. EXPLORED DRAWING & DISASSEMBLY INSTRUCTIONS 5.1 EXPLORED DRAWING AL718...
  • Page 16 5.2 Disassembly 5.2.1 Stand base& rear cover removal 1.remove the two screws "1"from neck 2.remove the base 3. remove the real cover 5.2.2. PCB holder removal 1.slide the pcb holder from the panel model 2.remove the pcb holder AL718...
  • Page 17 5.2.3. Panel module removal 1) remove four screws "4,5" 2) remove the Panel module AL718...

  • Page 18: Control Location

    There are some OSD menus defined in this system ♦ Main Menu ♦ Volume menu ♦ Prompt menu More detail descriptions are listed bellows: 6.2.1 Main Menu There are 5 sub functions in main menu. The selected function icon will show in red in AL718...
  • Page 19 + or -Key and press Select key to enter the sub function. * Brightness/Contrast Function Selec * Tracking Function Selec * Position Function Selec * Color Function Selec * Other Function AL718...
  • Page 20 Brightness/Contrast, Tracking, Position, Color and Other The Select button can enter function adjustment and goto next step. The Menu button can back to OSD-OFF. Step 2: – To use button to select the item to be adjusted. AL718...
  • Page 21 The Select or Menu button is to finish adjustment and then back to Step 2. 6.3.2 Volume Menu Operation – to adjus t Volume level and Select to toggle mute on/off. Menu to quit Volume adjust operation 6.3.3 OSD Time out The OSD Time out is defined to 20 sec. AL718...

  • Page 22: Necessary Equipment List

    7. NECESSARY EQUIPMENT LIST Item Discription Personal Computer with Windows 98 or above version Luminance Meter Minolta CA 110 Video Gnerator : Chroma 2000,2135,2250 or equivalent Colour Analyzer : Minolta , Chroma or equivalent Watt / Power Meter 10 Times Magnifier AL718...

  • Page 23: Block Diagram

    8. BLOCK DIAGRAM 8.1 Power Module +5V / 3A Inverter Vo ltage To Panel la mp +3.3V / 500mA Output Output +2.5V / 500mA Power Module Audio AC Input Output Speaker * 2 90 ~ 264V TDA7496 IC301 Audio Line-input AL718...

  • Page 24: Main Board

    OB / OG / OR [0..7] DATA VGA RED / GREEN / BLUE GM 2120 TO PANEL LVDS INTERFACE LCDVCC VGA VSYNC / HSYNC PPWR HS / VS Key Control GPIO0 / PWMO GPIO1/PWM1 VOLU Control GPIO 13/12 (NVRAM SCL/SDA) ROM DATA0~7 AT24C16 AT49HF AL718...

  • Page 25: Conductor View

    9. PCB CONDUCTOR VIEW 9. 1 Main Board AL718...
  • Page 26 AL718...
  • Page 27 9.2 Button Board AL718...

  • Page 28: Schematic Diagram

    10. SCHEMATIC DIAGRAM 10. 1 Main Board CONTENTS SCHEMATIC SHEET 1. CONTENTS 2. TOP LEVEL 3. INPUT CONNECTOR 4. gm2120 5. DISPLAY 6.LVDS IF AL718 10-1...
  • Page 29 GPIO9 GPIO8/IRQINn GPIO8/IRQINn GPIO8/IRQINn GPIO21/IRQn GPIO21/IRQn GPIO21/IRQn GPIO7 GPIO7 GPIO7 GPIO6 GPIO6 GPIO6 GPIO3/TIMER1 GPIO3/TIMER1 GPIO3/TIMER1 GPIO2/PWM2 GPIO2/PWM2 GPIO2/PWM2 GPIO1/PWM1 GPIO1/PWM1 GPIO1/PWM1 GPIO0/PWM0 GPIO0/PWM0 GPIO0/PWM0 PPWR PPWR PBIAS PBIAS PBIAS 5. Display 3. Input C onnector 4. gm2120 AL718 10-2...
  • Page 30 VGA VSY NC 22/6 VGA_HSY NC 22/6 C104 5.6V 47p/6 510/6 47p/6 5.6V +3.3V BLUE-IN BLUE+IN GREEN+IN GREEN-IN RED-IN RED+IN C155 SN74LVC14A/NS VGA VSY NC VGA_HSY NC 0.1u/6 VGA_SDA VGA_SCL VGA 5V VGA INPUT MTH276D126 MTH276D126 MTH276D126 MTH276D126 AL718 10-3...
  • Page 31 ROM_OEn Reserv ed ROM_OEn 22/6 C157 gm2120 12p/4 PQFP208 FOR DEBUG PORT C106 0.1u/6 3.3V_DVDD 47K/6 47K/6 GPIO4/UART_DI HFSn GPIO5/UART_DO R137 R136 22/6 22/6 HCLK 4-P/NS 0.1u/6/NS Re s e t Circuit /RESET 33p/6 33p/6 MAX809_1 DEBUG CONNECTOR AL718 10-4...
  • Page 32 KEY _ESC R114 22/6 LED_GRN DTC144EUA C129 C137 C116 C188 C139 C145 C187 C132 C135 C189 C185 C186 C190 C141 C113 12p/6 12p/6 12p/6 12p/6 12p/6 0.1u/6 12p/6 0.1u/6 0.1u/6 0.1u/6 12p/6 12p/6 0.1u/6 0.1u/6 0.1u/6 12p/6 LED_ORANGE DTC144EUA AL718 10-5...
  • Page 33 22u/6.3V 0.01u/6 3.pe r pairs +/- 10% TXIN23 TXIN24 4.pairs and pairs +/- 20% TXIN25 TXIN26 DISP_CLK TXCLKIN C184 12p/6 +3.3V 0.1u/6 22u/6.3V C183 C182 470u/16V 0.1u/6 LCDVCC 47K/6 1u/8 CX000800000/1206 0/6/NS 0.1u/6 4.7K/6 SI9435 PPWR MMBT3904L 470u/16V AL718 10-6...

  • Page 34: Button Board

    10. 2 Button Board BUTTON BOARD CONTENTS SCHEMATIC SHEET CONTENT I/O INTERFACE AL718 10-7...
  • Page 35 4501-10-10P-R AUTO/SEL HDK632R-ST RIGHT HDK632R-ST LEFT HDK632R-ST POWER HDK632R-ST orange MENU HDK632R-ST LED1 EL-209-2EGW green AL718 10-8...
  • Page 36 Pin 4 = 3.3V ? Pin 6 = 2.5V ? Check Scalar module Output CN3 Change Cable Pin 1,2 = 5V ? Fro m (power module)CN1 to (Scalar/ B) CN3 Pin 4 = 3.3V ? Pin 6 = 2.5V ? AL718 11-1...
  • Page 37 Change Inverter OK ? Output ? Check U8,GM2120 Check Panel & Change R,G,B Output ? Connector (30Pin) or Cable Check x’TA L X1 Change X1 14.318Mhz ? Check H,V Change VGA Cab le SYNC ? Change U8 GM 2120 AL718 11-2...
  • Page 38 OK ? Check Connector Change Cable CN2, Cable Check Powe r Module OSD Control CN1 Pin 12 Vo lu me Mute , Volu me & Pin11 Mute Check IC301 ADA7496 Correct ? Change ADA7496 Or Powe r Module AL718 11-3...

  • Page 39: Bom List

    CS21003F904 RESISTOR CHIP 1K,1/10W,+-1%(0603) CS21003J906 RES CHIP 1K 1/10W +-5%(0603) CS24703J900 RES CHIP 4.7K 1/10W +-5%(0603) CS31003J908 RES CHIP 10K 1/10W +-5%(0603) CS34703J901 RES CHIP 47K 1/10W +-5%(0603) CX0P121R000 EMI FILTER CHIP HI1206P121R-00(120 6A) DA0L7XMB4A2 PCB(M/B) L7X MB(4L,100*95,REVA) AL718 12-1...
  • Page 40 L70L-B STAND ASSY DDL70LLC006 CABLE ASSY L70L MB-LCD(30P,REV1A) DDL70LPB006 CABLE ASSY L70L MB-POWER(12P,REV1A) DDL70LPC002 CABLE ASSY L70L MB-VGA(14/15P,REV1A) DDL70LTH006 CABLE ASSY L70L MB-BUTTON(10P,REV1A) MM40080BCI5 SCREW M4.0*8-B(NI,NYLOK) MF30080BBJ5 SCREW F3.0*8L,B,NI DDL5TLTH101 CABLE ASSY L5TL POWER-CHASSIS(1P,REV1 1 29L70BATN02 L70L-T BASE ASSY AL718 12-2...

  • Page 41: Replacement Parts

    C47,C48,C49,C50,C51 ,C52,C53,C54,C55,C5 6,C57,C58,C59,C60,C 61,C62,C63,C64,C65, C66,C67,C71,C77,C79 ,C81,C83,C86,C87,C8 CH03306J905 CAPACITOR CHIP 33P 50V(+-5%,NPO,0603) 2 PC C84,C91 CH04706J902 CAPACITOR CHIP 47P 50V(+-5%,NPO,0603) 2 PC C99,C104 CH11006J901 CAPACITOR CHIP 100P 50V(+-5%,NPO,0603) 1 PC CH31006K919 CAP CHIP 0.01U 50V(+-10%,X7R,0603) 10 PC C1,C2,C3,C4,C105,C1 09,C112,C114,C130,C AL718 13-1...
  • Page 42 10 PC L1,L2,L3,L4,L6,L10,L 11,L13,L20,L21 DA0L7XMB4A2 PCB(M/B) L7X MB(4L,100*95,REVA) 1 PC DGP320001Z0 IC SOCKET,SMD PLCC 32P(LOW PROFILE,SM 1 PC CH51004MA32 CAPACITOR CHIP 1UF 25V(+-20%,Y5V,0805) 3 PC C11,C72,C195 AZL70SWB105 L70L-T SW BIOS IMAGE 1 PC BG614318D55 XTAL DIP 14.318MHZ(+-30PPM,07010-X-136-2 1 PC AL718 13-2...
  • Page 43 Qty UOM Location BEYG0024DA5 LED(DIP) YELLOW/GREEN(L-3WAFN/1GYW) 1 PC LED1 DAL70TB42A4 PCB(BUTTON) L70L-T TB(2L,143.5*15,REVA) 1 PC DFHD10MR316 CONN DIP HEADER 10P 1R MR(P2.0,H4.1) 1 PC DHP00062N10 SWITCH PUSH BUTTON(DTSA-62N,50MA,12V 5 PC SW1,SW2,SW3,SW4, 13.3 Power Board Replacement Parts List P/N : AS020126031 AL718 13-3...
  • Page 44 8 29L70BATN02 L70L-T BASE ASSY 9 DDL70LLC006 CABLE ASSY L70L MB-LCD(30P,REV1A) 10 DDL70LPB006 CABLE ASSY L70L MB-POWER(12P,REV1A) VGA cable 11 DDL70LPC002 CABLE ASSY L70L MB-VGA(14/15P,REV1A) 12 DDL70LTH006 CABLE ASSY L70L MB-BUTTON(10P,REV1A) 13 DDL5TLTH101 CABLE ASSY L5TL POWER-CHASSIS(1P,REV1A 1 AL718 14-1...

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