Daewoo 531X - Manuals

Daewoo 531X – Manual in PDF format online.

Manuals:

Manual

Manual Daewoo 531X

Summary

Page 2 - CONTENTS

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 AND ADJUSTMENT 9 ALIGNMENT PROCEDURE 12 TROUBLESHOOTING HINTS 15 BLOCK DIAGRAM 29 PCB LAYOUT 30 SCHEMATIC DI...

Page 3 - SAFETY PRECAUTIONS; Safety Check

1 SAFETY PRECAUTIONS ◆ Safety Check Care should be taken while servicing this analog color display because of the high voltages used in the deflectioncircuits. These voltages are exposed in such areas as the associated flyback and yoke circuits. ◆ Fire & Shock Hazard • Insert an isolation transf...

Page 4 - GENERAL SAFETY INFORMATION; Terms in the manual; High Voltage Warning

2 Warning: This product includes critical mechanical and electrical parts which are essential for x ray protection. For continued safety, replace critical components that are indicated in the servicemanual with exact replacement parts given in the parts list. Operating high voltage with this product...

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 - TECHNICAL INFORMATION

6 ◆ Power IC, Transistor or Devices Removal/Replacement 1. Heat and remove all solders from the device leads.2. Remove the heatsink mounting screw (if applicable).3. Carefully remove the device from the circuit board.4. Insert new device in circuit board.5. Solder each device lead and then clip off ...

Page 9 - Abbreviations; GENERAL INFORMATION

This color monitor automatically scans all horizontal frequencies from 30KHz to 54KHz, and all vertical frequencies from50Hz to 160Hz. This color monitor supports IBM PC, PC/XT, PC/AT, personal System/2 (PS/2), Apple Macintosh, andcompatible users crisp text and vivid color graphics display when usi...

Page 10 - Pin Signal; Caution For Servicing; PIN CONNECTOR

8 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) • Degaussing is always required when adjusting purity or convergence.• The white balan...

Page 11 - OPERATION AND ADJUSTMENT; Control Panel

9 OPERATION AND ADJUSTMENT Control Panel • Move cursor to the right window on the OSD window. • Increase the value of any selected function. • Move cursor to the left window on the OSD window. • Decrease the value of any selected function. • Launch OSD(On-Screen Display) MENU window. • Move cursor t...

Page 12 - Key Process

10 • When you choose the icon on the OSD window, you can exit the OSD screen. OSD OFF MENU MENU MENU MENU Key Process

Page 13 - OSD Functions

11 OSD Functions ICON CONTROL FUNCTIONS Adjust the pin corner bottom when the bottom sides of the screen are bowed. B. PIN CORNER Adjust the parallelogram when the screen is leaning left or right. Adjust the pin corner top when the top sides of the screen are bowed. T. PIN CORNER PARALLELOGRAM Adjus...

Page 15 - ALIGNMENT PROCEDURE; Standard Adjustment Conditions; Method to launch the factory mode

ALIGNMENT PROCEDURE ◆ Standard Adjustment Conditions 1. Power source voltage : 100-240Vac 50/60Hz 2. Aging : Take at least 20 minutes warm-up time.3. Signals Video : Analog 0.7Vpp 75 Ω terminal positive polarity Synchronizing : TTL level Negative/Positive SeparateDeflection frequency Horizontal Freq...

Page 17 - TROUBLESHOOTING HINTS

15 TROUBLESHOOTING HINTS 1. No Character Change the Contrast &Brightness control value tomaximum No Raster Refer toNo Raster Check the peripheral circuitof CRT Check the video outputcircuit and its ambient circuit Trouble in 12V lineof the Main PWB Check the clamping pulse circuit Check the sign...

Page 21 - Horizontal Output Circuit

MODE B+ Voltage VGA 60Vdc Super VGA 72Vdc 54KHz 110Vdc 19 5. Horizontal Output Circuit Is the B+line voltage over 50V? Is the H-out waveform of IC501 normal? Trouble in IC501 Trouble in Horizontal output circuit (No Raster Yes No Is the Collector wave form of Q504 normal? Yes Yes Yes Trouble in Q505...

Page 31 - BLOCK DIAGRAM; CM

29 BLOCK DIAGRAM CM C- 5 3 1 X M O NI T O R BL O C K DI A G RA M CR T SO C KET C R T : O ri on M ini -N ec k 15" D - S UB RG B H/ V V id eo P re- am p ( 65M H z ) T D A 921 0 ( S G S T h om ps on) OS D N T 6828 (N o v at ek ) CR T Dr iv e r T D A 953 6 (S G S T h o m ps on) AC I N PU T SM PS Tr ...

Page 32 - PCB LAYOUT; Main PCB Component Side

Page 33 - Main PCB Solder Side

Page 35 - SCHEMATIC DIAGRAM; Power & Connection Section

33 SCHEMATIC DIAGRAM Power & Connection Section

Page 37 - Horizontal Section

Page 38 - Video Section

Page 39 - EXPLODED VIEW DIAGRAM

Page 40 - Important Safety Notice

38 RESISTOR Description Example: CAPACITOR Description Example: Fig & Part No Description Index Capacitors C102 CCXF1H104Z Ceramic 50V 0.1µ F Z C402 CCXB1H331K Ceramic 50V 330PF KC105 CMXM 2A224J MYLAR 100V 0.22µ FJ Allowance C ± 0.25pF D ± 0.5% F ± 1pF J ± 5% K ± 10% P ± 100% ~ 0% Z ± 80% ~ – F...

Page 41 - ELECTRICAL PARTS LIST

39 00001 9979800540 PCB MAIN T=1.6*246*247 (531X) 00002 9979800548 PCB CRT T=1.6*108*82(531X) 00020 W3475N731- CORD POWER 3 H05VV-F 3X0.75 1.8 IV B001 5PB13890-- COIL BEAD BI3890 B006 5PB13890-- COIL BEAD BI3890 B007 5PB13890-- COIL BEAD BI3890 B101 5PB13857-- COIL BEAD BI3857(AXIAL) B102 5PB13857--...