Page 2 - CONTENTS
SAFETY PRECAUTIONS 1 GENERAL SAFETY INFORMATION 2 SERVICING PRECAUTIONS 3 TECHNICAL INFORMATION 6 GENERAL INFORMATION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REPAIR 8 OPERATION & ADJUSTMENT 9 ALIGNMENT PROCEDURE 14 TROUBLESHOOTING HINTS 15 BLOCK DIAGRAM 22 PCB LAYOUT 23 SCHEMATIC DIAGRAM 2...
Page 3 - SAFETY PRECAUTIONS; Safety Check
1 SAFETY PRECAUTIONS ◆ Safety Check Care should be taken while servicing the inverter that generates the high voltage to lighten CCFL of theLCD panel. ◆ Fire & Shock Hazard • Insert an isolation transformer between the analog color display and AC power line before servicing the chassis. • When s...
Page 4 - GENERAL SAFETY INFORMATION; Terms in the manual; High Voltage Warning
2 GENERAL SAFETY INFORMATION ◆ Terms in the manual CAUTION Statements identify conditions or practices that could result in damage to the equipment or other property. WARNING Statements identify conditions or practices that could result in personal injury or loss of life. ◆ Terms as marked on equipm...
Page 5 - SERVICING PRECAUTIONS; General Servicing Precautions
3 SERVICING PRECAUTIONS ◆ General Servicing Precautions 1. Always unplug the AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board, module, or any other instrument assembly. b. Disconnecting or reconnecting any electrical plug or other electrical con...
Page 6 - General Soldering Guidelines
4 ◆ Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity.Such components are commonly called Electrostatically Sensitive (ES) Devices.The typical examples of ES devices are integrated circuits, some field-effect transistors, an...
Page 7 - IC Removal/Replacement; Replacement
5 FIGURE 1. USE SOLDERING IRON TO PRY LEADS ◆ IC Removal/Replacement Some utilized chassis circuit boards have slotted (oblong) holes through which the IC leads are insertedand then bent flat against the circuit foil. When holes are slotted, the following technique should be usedto remove and replac...
Page 8 - Diode Removal/Replacement; TECHNICAL INFORMATION
6 ◆ Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body.2. Bend the two remaining leads perpendicularly to the circuit board.3. Observing diode polarity, wrap each lead out of the new diode around the corresponding lead on the circuit board. 4...
Page 9 - Abbreviations; GENERAL INFORMATION
7 This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 62KHz, and allvertical frequencies from 50Hz to 75Hz. This TFT LCD monitor supports IBM PC, PC/XT, PC/AT, personalSystem/2 (PS/2), Apple Macintosh, and compatible users crisp text and vivid color graphics display whe...
Page 10 - PIN CONNECTOR; Caution For Servicing; CAUTIONS FOR ADJUSTMENT AND REPAIR
8 Arrangement of 15-pin D-sub connector Pin Signal 1 Red2 Green3 Blue4 GND 5 GND 6 GND - Red 7 GND - Green 8 GND - Blue 9 + 5Vdc 10 GND - H.Sync 11 GND - V.Sync 12 Bi-directional Data (SDA) 13 Horizontal Sync 14 Vertical Sync (VCLK) 15 Data Clock (SCL) 1 6 10 15 PIN CONNECTOR • Degaussing is always ...
Page 11 - OPERATION AND ADJUSTMENT
9 Control Panel Hot Key EXIT AUTO MENU BRIGHTNESS • The AUTO button launches the AUTO TRACKING function directly. • The EXIT button turns the OSD (On-Screen Display) window off. • This button moves from sub menu to top menu in the OSD window. • The MENU button turns the OSD window on. • This button ...
Page 12 - Key Process
10 Key Process OSD OFF MENU EXIT EXIT MENU EXIT MENU OSD OSD S H A R P N E S S S H A R P N E S S M E N U U T L T Y U T L T Y U T L T Y
Page 13 - Adjustment Procedure
11 Adjustment Procedure Adjust the CLOCK control. Perform the AUTO POSITION . Is the H.Size proper? Is the noise displayed on the screen? Perform the AUTO TRACKING . Is the noise displayed on the screen yet? Is the noise displayed on the screen yet? Adjust the CLOCK FINE until the screen is cleared....
Page 14 - OSD Functions
12 Display horizontal & vertical frequency and polarity. STATUS Reset the screen to the Factory Preset Display Settings. RECALL AUTO POSITION Choose automatically the proper horizontal position and verticalposition & size of the screen image. CONTRAST Adjust the contrast of image, the differ...
Page 15 - Self Diagnosis
13 Self Diagnosis When the monitor doesn’t display, if you press any key, Self Diagnosis screen is displayed. Self Diagnosisfunction checks if the status of the monitor is No Signal or Out of range. No Signal screen is displayed when the D-Sub signal connector is not connected orthe status of the mo...
Page 16 - ALIGNMENT PROCEDURE
14 Standard Check point 1. Power source : 100 - 240Vac, 50/60Hz.2. Aging : Take at least 20 minutes warm-up time.3. Signal Video input : Analog 0.7Vpp 75 Ω terminal positive polarity Synchronizing : acceptable negative or positive at TTL levelMax. Resolution : 1024 x 768 75HzFrequency Horizontal : 3...
Page 17 - Abnormal mode detect; TROUBLESHOOTING HINTS
15 1. Abnormal mode detect Is a input H-sync of ADC(pin 90, U2) correct? Abnormal mode detect No No Yes Yes Is waveform of pin 81 of ADC(U2) correct? Trouble in the H-sync input circuit. Trouble in ADC. Trouble in Scaler(U1). Yes TROUBLESHOOTING HINTS
Page 18 - Trouble in Power on
16 2. Trouble in Power on No No Yes Yes Is 5VS line normal(pin 8 of CN2)? Trouble in U6 & Q5 and its ambient circuit. Check the power board (5VS of CN2A). Check on Scaler(U1). Is the Power LED toggled between on and off? Off No Yes On Is the power cord well connected? Refer to No video or No ras...
Page 24 - Mainbord Control; BLOCK DIAGRAM
22 ASI320 Input Video Ra te - H: 30~62kHz, V: 56~75Hz - Resolution: up to 1024*76 8 15PIN DSUB PRE-AMP Controller ADC PLL Offset & ampl ifier Buffer (74ACT14) Power Board Micom (MTV212M) EEPROM AC input ra te -Voltage: 100~240V a c -Frequency: 50/60 H z 12MHz DC-AV inverter ADI Scalar OSD 14.318...
Page 25 - PCB LAYOUT
23 24 Main PCB Component Side Main PCB Solder Side PCB LAYOUT
Page 28 - Main Section; SCHEMATIC DIAGRAM
Page 29 - SMPS Section
Page 30 - EXPLODED VIEW & MECHANICAL PARTS LIST
Page 31 - Important Safety Notice; INFORMATION OF PART DESCRIPTION
30 RESISTOR Description Example: CAPACITOR Description Example: Fig & Part No Description Index Capacitors C28 HCFK104ZBA Chip Cera 50V Z C63 HCBK393KBA Chip Cera 50V K C44 HCQK102JBA Chip Cera 50V J Tolerance C ± 0.25pF D ± 0.5% F ± 1pF J ± 5% K ± 10% P ± 100% ~ 0% Z ± 80% ~ – Fig & Part No...
Page 32 - ELECTRICAL PARTS LIST
31 00020 W3415M731- CORD POWER C5 H03VV-F 3X0.75 1.8M BK 00040 9970800035 CABLE SIGNAL AS 15P+15P/DDC=1.5M(GY275A) B801 5PB13857-- COIL BEAD BI3857(AXIAL) C1 HCQK100JBA C CHIP CERA 50V CH 10PF J 1608 C10 HCBK223KBA C CHIP CERA 50V X7R 0.022MF K 1608 C101 HCENH101MD C CHIP ELECTRO MV 25V 100MF D8.0XH...
