Acer SPECTRUM AL801 Service Manual
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Acer SPECTRUM AL801 Service Manual

Acer SPECTRUM AL801 Service Manual

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SERVICE MANUAL

SPECTRUM Series
LCD Monitor
AL801
Acer

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Summary of Contents for Acer SPECTRUM AL801

  • Page 1: Service Manual

    SERVICE MANUAL SPECTRUM Series LCD Monitor AL801 Acer...
  • Page 2 THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY 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, ERRORS OR OMISSIONS, MANUFACTURE DATA : Mar-08-2003 REVISE:...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS PAGE 1. SPECIFICATIONS ....................GENERAL SPECIFICATIONS ...........…....LCD MONITOR DESCRIPTION ..............INTERFACE CONNECTOR ..............……. 2. PRECAUTION AND NOTICES ................ASSEMBLY PRECAUTION ................. OPERATIONG PRECAUTION ..............STORAGE PRECAUTION …................ HIGH VOLTAGE WARNING ............... 3. OPERATING INSTRUCTIONS ................4. ADJUSTMENT ......................ADJUSTMENT CONDITIONS AND PRECAUTIONS .......

  • Page 4: Specifications

    1. SPECIFICATIONS FOR LCD MONITOR General specifications LCD-PANEL : Active display area 18 inches diagonal Pixel pitch 0.279 mm x 0.279 mm 1280 x 1024 RGB vertical stripe arrangement Pixel format Display Color : 8-bit, 16.7 million colors External Controls : ●...

  • Page 5: Lcd Monitor Description

    LCD MONITOR DESCRIPTION The LCD MONITOR will contain an main board, an Inverter module, keyboard, External Adapter which house the flat panel control logic, brightness control logic, DDC and DC-DC conversion The Inverter module will drive the backlight of panel . The Adapter will provides the 12V DC-power 4.16 Amp to Main-board,and Inverter module .

  • Page 6: Precaution And Notices

    2. PRECAUTIONS AND NOTICES ASSEMBLY PRECAUTION (1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface by touching with bare hands ( Polarizer film, surface of LCD panel is easy to be flawed) In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display characteristic and reliability.

  • Page 7: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the LCD monitor display. Position the display on the desired operation and plug–in the power cord into External Adapter 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 8: Adjustment

    4. ADJUSTMENT ADJUSTMENT CONDITIONS AND PRECAUTIONS Adjustments should be undertaken only on following function : Contras , Brightness, Black level, Phase, Clock , H/V-position , Languages, Color-(C2,C1,User), Auto level, OSD-position, Languages, Reset ADJUSTMENT METHOD Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to select the function or done the adjustment.
  • Page 9 Gain adjustment : adjust C2 color-temperature Set the Contrast of OSD function to 45 and Adjust Brightness to chroma 7120 Y=240 ±5 cd/m Switch the chroma-7120 to RGB-mode (with press “MODE” button ) Switch the MEM.channel to Channel 01 ( with up or down arrow on chroma 7120 ) The lcd-indicator on chroma 7120 will show x = 302 ±10, y = 319 ±10, Y = 200 ±5 cd/m Adjust the Color(user)Mode: RED on OSD window, until chroma 7120 indicator reached the value R=100...

  • Page 10: Front Panel Control Knobs

    Clock adjustment Set the Chroma at pattern 63 (cross-talk pattern) or WIN98/95 shut-down mode (dot-pattern). Adjust until the vertical-Stripe-shadow as wide as possible or no visible. This function is adjust the PLL divider of ADC to generate an accurate pixel clock Example : Hsyn = 31.5KHz Pixel freq.

  • Page 11: Circuit & Software Description

    5. CIRCUIT-DESCRIPTION SPECIAL FUNCTION WITH PRESS-KEY A). press Menu button during 2 seconds along with plug-in the DC Power cord: That operation will set the monitor into “Factory- mode”, in Factory mode we can do the White balance adjustment with RS232 In Factory mode, OSD-screen will locate in left top of screen.
  • Page 12 MODULE-TPYE COMPONENT: 1. ADAPTER : CONVERSION-module to convert AC 110V-240V to 12VDC, with 4.16 AMP 2. INVERTER : CONVERSION-module to convert DC 12V to High-Voltage around 1650V, with frequency 30K-80Khz, 5.6mA-13mA Main-board Block diagram Input analog RGB & H,V,& ddc signal & Rs232 communication GMZAN2 (U200) Data Digital RGB...

  • Page 13: Software Flow Chart

    SOFTWARE FLOW CHART Power-On Subroutine CHART POWER-ON START Initial MCU I/O, Interrupt vector & Ram Initial 1.POC (backlight counter) Check Eeprom is empty ? 2. Clr all mode value Check White-balance data(C1 & C2) same with the backup data ? Check POC( backlight counter) data same with the backup data ? IF not same, overwrite the data with backup value.
  • Page 14 MAIN SUBROTINE LOOP Main loop start Process Power-saving status ( according to below flow-chart result) Check GMZAN2 IFM status .is change or not. And check Signal cable status ( cable not connected or not ) ** IFM is the register which measured the HSYN & Vsyn status Yes, IFM have change Wake-up GMZAN2 (because GMZAN2 was in...

  • Page 15: Interface-Board Trouble-Shooting Chart

    6 A). INTERFACE-BOARD TROUBLE-SHOOTING CHART *Use the PC Win 98 white pattern, with some icon on it, and Change the Resolution to 640x480 60 Hz / 31 KHz **NOTICE : The free-running freq. of our system is 48 KHz / 60 Hz, so we recommend to use another resolution to do trouble shooting, this trouble shooting is proceed with 640x480 @60Hz 31Khz NO SCREEN APPEAR DC-Power Part...
  • Page 16 PANEL-POWER CIRCUIT Check the PPWR panel power relative circuit, R223,R224, Q200,U202(pin 5,6,7,8) In normal operation, when LED =green, R223 check R225 should have response from 0V to 5V should =0 v, When we switch the power switch from on to off If PPWR no-response when the power switch Turn on and turn off, replace the U200-GMZAN2 OK,R225 have response...
  • Page 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 symptom 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) Check if the Wire harness from CN603 loose? Tighten it.
  • Page 18 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. KEYBOARD BLOCK check Check U302 MCU pin 43,42,41,40,39 at Mechanical was stuck, Check !
  • Page 19 POWER-BLOCK check *Note : the Waveform of U304 pin 2 can determined the power situation 1. stable rectangle waveform with equal duty, freq around 150K-158KHz that means all power of this interface board is in normal operation ,and all status of 5V & 3.3V is working well 2.
  • Page 20 III.ALL SCREEN HAS INTERFERENCES OR NOISE, CAN’T BE FIXED BY AUTO KEY ** NOTE: There is so many kind of interferences, 1). One is cause by some VGA-CARD that not meet VESA spec or power grounding too bad that influence our circuit 2).other is cause by external interferences, move the monitor far from electronic equipment.( rarely happened) Use DOT-pattern, or win98/99 shut-down...
  • Page 21 There is interferences in DOS MODE NOTE :the criteria of doing AUTO-CONFIGURATION : must be a full-size screen, if the screen not full , the auto- configuration will fail. So in dos mode ,just set your “CLOCK” in OSD-MENU to zero or use some EDITOR software which can full fill the whole screen (ex: PE2, HE) and then press “AUTO”...

  • Page 22: Inverter -Module Spec &Trouble Shooting Chart

    6 B). INVERTER –MODULE SPEC &TROUBLE SHOOTING CHART For AL801 model , use CMO panel, and the INVERTER is made by Emax Parts No.: 79L L18 –1- E CONNECTOR PIN ASSIGMENT: A) CON1: INPUT MODEL NO.: S5B-PH-SM3-TB SYMBOL DESCRIPTION Input voltage: 12V Input voltage: 12V ON/OFF ON: 3V OFF:0V...
  • Page 23 D) FUNCTION TEST CIRCUIT: 120KΩ 120KΩ CON4 CON2 10Ω 10Ω CON5 CON3 CON1 VT-181 1 2 3 4 5 120KΩ 120KΩ 10Ω 10Ω VT-181...
  • Page 24 II. TROUBLE SHOOTING BLOCK DIAGRAM NO POWER: CHECKED ON FUSE TO CHANGED F1 Vin=12 FAIL F1= 4.0A/63V TO CHECKED Q4 & Q6 TO CHANGED PASS FAIL VOUT = 9V CH1: Q4/Q3/Q11 CH2: Q5/Q6/Q12 TO CHECKED L1/L2 PASS INPUT 9V TO L1 OR L2 TO CHANGED FAIL CH1: Q7/Q8/D12/PT1...
  • Page 25 C) OUTPUT CURRENT ABNORMALITY: CHECK PWM FREQUNCY AT C6 FAIL TO CHANGE C6 CHIP OR IC CHIP CHIP THE OSCILLATOR FREQUNCY RANGE = 150 ~ 250 KHZ PASS FUNCTION TEST OK! ENBALE ABNORMALITY: IF ENABLE ABNORMALITY TO CHANGE ON Q1 1.

  • Page 26: Mechanical Of Cabinet Front Dis-Assembly

    TRANSFORMER ABNORMALITY: IF TRANSFORMER ABNORMELITY TO CHECK FAIL TO CHANGE C3 & C4 OR C3 & C4 CHIP OUTLINE OR TRANSFORMER TRANSFORMER PASS FUNCTION TEST OK! G) INSTRUMENTS FOR TEST: DC POWER SUPPLY GPS-3030D AC VTVM VT:-181E DIGITAL MULTIMERTER MODEL-34401 HIGHTVOLT PROB MODEL-1137A SCOPE...
  • Page 27 50L 600 2 HANDLE1 1.0000 PCS 50L 600 3 HANDLE2 1.0000 PCS 1150 C WHITE TAPE 85.0000 MM 1185 22 ACER TYPE 12.0000 CM 1186 SMALL TAPE 8.0000 CM 52L6020 3 PROTECT FILM 0.1000 PCS 79L L18 1 E INVERTER BY EMAX 1.0000 PCS...
  • Page 28 Q1L 340 12128 SCREW 6.0000 PCS Q1L 340 16120 SCREW 4X16 4.0000 PCS Q1L1830 10120 SCREW 2.0000 PCS 750LLM80E01 CHI MEI 18"PANEL 1.0000 PCS 705L880KB34 14 LCD 　ASS'Y 1.0000 PCS CBPC880KMYAE CONVERSION BOARD FOR AIC880KMYAE MAIN BOARD FOR T880K* 1.0000 PCS CN303 33L3802 5H WAFER 5P RIGHT ANELE P...
  • Page 29 U202 56L 566 6 SI9953DY-T1 1.0000 PCS U904 56L 585 4 AIC1117-33CY 1.0000 PCS U905 56L 585 5 RT9164-25CG 1.0000 PCS U401 56L 74F 14 P N74F14D SMT 1.0000 PCS U203 56L1133 16 24LC21A/SN 1.0000 PCS U300 56L1133 33 M24C16-MN6T 1.0000 PCS Q200 57L 417 4...
  • Page 30 R326 61L0603103 CHIPR 10K OHM +-5% 1/1 1.0000 PCS R327 61L0603103 CHIPR 10K OHM +-5% 1/1 1.0000 PCS R328 61L0603103 CHIPR 10K OHM +-5% 1/1 1.0000 PCS R329 61L0603103 CHIPR 10K OHM +-5% 1/1 1.0000 PCS R333 61L0603202 CHIPR 2K OHM+-5% 1/16W 1.0000 PCS R213 61L0603222...
  • Page 31 C211 65L0603104 12 0.1UF +-10% 16V X7R 1.0000 PCS C212 65L0603104 12 0.1UF +-10% 16V X7R 1.0000 PCS C213 65L0603104 12 0.1UF +-10% 16V X7R 1.0000 PCS C215 65L0603104 12 0.1UF +-10% 16V X7R 1.0000 PCS C217 65L0603104 12 0.1UF +-10% 16V X7R 1.0000 PCS C218 65L0603104 12...
  • Page 32 C615 67L 312100 3 SMD 10uf +-20% 16V 1.0000 PCS C620 67L 312100 3 SMD 10uf +-20% 16V 1.0000 PCS C200 67L 312101 3 SMD 100UF +-20% 16V 1.0000 PCS C203 67L 312101 3 SMD 100UF +-20% 16V 1.0000 PCS C206 67L 312101 3 SMD 100UF +-20% 16V...
  • Page 33 D210 93L 39146 LL5232B SMT 0.0000 PCS D200 93L 39147 TZMC5V6-GS08 1.0000 PCS D201 93L 39147 TZMC5V6-GS08 1.0000 PCS D208 93L 39147 TZMC5V6-GS08 1.0000 PCS D209 93L 39147 TZMC5V6-GS08 1.0000 PCS D210 93L 39147 TZMC5V6-GS08 1.0000 PCS D200 93L 39149 MLL5232B BY FULL POWER 0.0000 PCS D201...
  • Page 34 DC JACK 1.0000 PCS 95L8014 9 9 HARNESS 1.0000 PCS AIK880KY1 KEY BOARD FOR T880K*I 715L 912 1 18" LCD Acer KEY BRD 1.0000 PCS J102 95L 90 23 TIN COATED 0.0000 PCS J101 61L 60210252T CFR 1K OHM+-5% 1/6W 1.0000 PCS...

  • Page 35: Power System And Consumption Current

    *Red marked part is important component POWER SYSTEM AND CONSUMPTION CURRENT ADAPTER MODULE INVERTER MODULE Input AC 110V, 60Hz/240V, 50Hz Input DC 12V Output DC 12V 5A Output AC 1500V/30K-80KHz Current 14mA Main board power system LM2596S-5, 12V to 5V (5A SPEC) To CPU, Eeprom, 24c21, control-inverter-on.off 860mA when Cable not Connected 841mA when Normal operation...

  • Page 36: Pcb Layout

    PCB LAYOUT MAIN PCB LAYOUT DDC chip RT9164 LVDS power ( LT1117) 5V to 2.5v 5V to 3.3v Input Connector LVDS Gmzan2 AIC1084 5V to 3.3v Panel- Power Control Inverter-connector Keyboard-connector LM2596 convert 12V to 5V Audio-connector...

  • Page 37: Schematic Diagram

    DENABLE TCLK TX2-/+O TX2-/+O MFB9 TX3-/+O TX3-/+O TXC-/+O TXC-/+O TXCLKIN /PWRDWN NT7181 CRYSTAL2 50MHZ 24LC21A EEPROM /VGA_CON EEPROM1 24C16 MICRO CONTROLLER Winbond ACER SIEMENS 43B1-M Title BLOCK DIAGRAM CRYSTAL1 20MHZ Size Document Number 715L820-2-2 Date: Monday, July 29, 2002 Sheet...
  • Page 38 C929 C930 VDDA C947 C946 0.1uF 0.1uF 100uF 100uF 600(1206) C224 C225 C226 C227 C228 ACER Electronics Co., Ltd. C222 C223 100uF 0.1 uF 0.1 uF 0.1 uF 0.1 uF ADC-AGND 0.1 uF 0.1 uF Title ZAN2 ADC GNDA Size...
  • Page 39 L604 C939 C940 TXIN16 PLLGND PD35 0.01UF 0.1uF 0.1uF 10uF BEAD (120) 330uF 330uF TXIN17 PLLGND TXIN23 TXIN24 TXIN25 PDISPE TXIN26 PCLKB TXCLKIN ACER Electronics Co., Ltd. Title LVDS Size Document Number 715A820-2-2 Custom Date: Monday, October 21, 2002 Sheet...
  • Page 40 MMBT3904 /BKLT-ON Q304 R(OP) HEADER 5 R403 10 K 4.7K(OP) 24LC04B R401 R402 VR501 BKLT ADJ BKLT-PWM 10 K 0(OP) C401 1K(OP) 100uF(OP) ACER Electronics Co., Ltd. Title MICRO CONTROLLER Size Document Number 715L820-2-2 Date: Monday, October 21, 2002 Sheet...

  • Page 41: Power Block

    U305 AIC 1084 L300 Vout (600) C310 C311 C312 330 uF/35V 0.1 uF 330 uF/35V Distribute throughout digital 'Gnd' plane TP700 TP701 TP702 TP703 Acer Electronics Co., Ltd. Title POWER Size Document Number 715L820-2-2 Date: Wednesday, November 07, 2001 Sheet...

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