MicroTechnologies
For all types of monitor repairs in Mumbai India
Tel 91-22-65001468
www.microonline.net

Contents:

Table of Contents
Chapter 1) About the Author & Copyright
Chapter 2) Introduction
2.1) Monitors, monitors, and more monitors
2.2) Related Information
2.3) Monitor fundamentals
2.4) Monitor characteristics
2.5) Types of monitors
2.6) Why auto-scan?
2.7) Analog vs. digital monitors
2.8) Interlacing
2.9) Monitor performance
2.10) Performance testing of monitors
2.11) Monitor repair
2.12) Most Common Problems
2.13) Repair or replace
Chapter 3) Monitors 101
3.1) Subsystems of a monitor
3.2) For more information on monitor technology
3.3) On-line tech-tips databases
Chapter 4) CRT Basics
4.1) Color CRTs - shadow masks and aperture grills
4.2) Degaussing (demagnetizing) a CRT
4.3) How often to degauss
4.4) Why are there fine lines across my Trinitron monitor or TV?
Chapter 5) Monitor Placement and Preventive Maintenance
5.1) General monitor placement considerations
5.2) Non-standard monitor mounting considerations
5.3) Preventive maintenance - care and cleaning
5.4) Monitor tuneup?
Chapter 6) Monitor Troubleshooting
6.1) SAFETY
6.2) Safety Guidelines
6.3) Troubleshooting tips
6.4) Test equipment
6.5) Incredibly handy widgets
6.6) Safe discharging of capacitors in TVs and video monitors
6.7) Additional information on discharging CRTs
6.8) The series light bulb trick
6.9) Getting inside a monitor
6.10) Specific considerations before poking around inside a TV or monitor
6.11) Dusting out the inside of a monitor
6.12) Troubleshooting a monitor with the mainboard disconnected
Chapter 7) Monitor Adjustments
7.1) User picture adjustment
7.2) Focus adjustment
7.3) Brightness and color balance adjustment
7.4) Optimal procedure for setting brightness/background and screen adjustments
7.5) Position, size, and linearity adjustment
7.6) Pincushion adjustments
7.7) Geometry adjustment
7.8) Why is the convergence on my monitor bad near the edges
7.9) CRT purity and convergence problems
7.10) CRT purity adjustment
7.11) CRT convergence adjustment
7.12) Tilted picture
7.13) Monochrome monitor size, position, and geometry adjustments
Chapter 8) Low Voltage Power Supply Problems
8.1) Low voltage power supply fundamentals
8.2) Monitor deflection derived power supply faults
8.3) Power button on monitor is flakey
8.4) Monitor blows fuse
8.5) Internal fuse blew during lightning storm (or elephant hit power pole)
8.6) Fuse replaced but monitor clicks with power-on but no other action
8.7) Power-on tick-tick-tick or click-click-click but no other action
8.8) No picture but indications of power
8.9) Monitor mostly dead, possible whine from power supply
8.10) Reduced width picture and/or hum bars in picture
8.11) Dead monitor with periodic tweet-tweet-tweet, flub-flub-flub, low-low voltage
8.12) Monitor power cycling on and off
8.13) Shorted Components
8.14) Startup problems - nothing happens, click, or tick-tick-tick sound
8.15) Monitor turns off after warming up
8.16) Monitor doesn't power up immediately
8.17) Old monitor requires warmup period
8.18) Monitor shuts down with bright picture or when brightness is turned up
8.19) Power supply interactions
8.20) Relays in the Power Circuitry of monitors
8.21) What is a posistor?
8.22) Flameproof Resistors
Chapter 9) Deflection Problems
9.1) Deflection fundamentals
9.2) Monitor display is off-center
9.3) Gross problems in size or position at certain scan rates
9.4) Reduced width
9.5) Can incorrect or missing video damage my monitor?
9.6) Picture squeezed in then died
9.7) Horizontal deflection shutting down
9.8) Horizontal squashed
9.9) Monitor non-linearity
9.10) Picture squeezed on both left and right side of screen
9.11) Vertical squashed
9.12) Keystone shaped picture
9.13) Picture size changing
9.14) Monitor will not sync
9.15) Horizontal lock lost
9.16) Insufficient width (without hum bars)
9.17) Loss of horizontal sync (also applies to vertical) after warmup
9.18) Replicated or offset multiple images
9.19) Part of picture cut off
9.20) Bright or dark bars on edge of picture (horizontal or vertical)
9.21) Single Vertical Line
9.22) Single Horizontal Line
9.23) Intermittent jumping or jittering of picture or other random behavior
9.24) Horizontal output transistors keep blowing (or excessively hot)
9.25) Horizontal output transistors blowing at random intervals
9.26) Vertical foldover
9.27) Excessive width/pincushioning problems
9.28) Uncorrectable pincushion distortion with new monitor
9.29) Deflection yoke testing
9.30) Deflection yoke repair
9.31) Testing of flyback (LOPT) transformers
9.32) Picture size suddenly becomes larger (or smaller)
9.33) Burning up of various size or centering resistors
9.34) Picture shifted horizontally
Chapter 10) High Voltage Power Supply Problems
10.1) HV power supply fundamentals
10.2) What is a tripler?
10.3) High voltage shutdown due to X-ray protection circuits
10.4) Low or no high voltage
10.5) Excessive high voltage
10.6) Snaps, crackles, and other HV breakdown
10.7) Arcing, sparking, or corona from CRT HV anode (red wire/suction cup)
10.8) Arcing at spark gaps and gas discharge tubes on CRT neck board or elsewhere
10.9) Arcing from flyback or vicinity
10.10) Dave's complete procedure for repair of an arcing flyback
10.11) Spark gaps and gas discharge bulbs on CRT neck board or elsewhere
10.12) Arcing due to bad connections to or disconnected CRT return
10.13) Flashovers inside the CRT
10.14) Ozone smell and/or smoke from monitor
10.15) X-ray and other EM emission from my monitor?
10.16) Should I be worried about X-ray exposure while servicing a TV or monitor?
10.17) Flyback got wet
10.18) Blooming or breathing problems
10.19) Erratic focus or screen (G2) voltage and/or controls on flyback
10.20) Focus/Screen divider bypass surgery
10.21) Decaying or erratic focus or screen (G2) voltages
10.22) Disconnecting focus wire from CRT driver board
10.23) Focus or screen voltage drifts after warmup only when CRT is connected
Chapter 11) Raster, Color, and Video Problems
11.1) Blank picture, power light on, digital controls (if any) active
11.2) Brightness control has no effect
11.3) No color - black and white picture
11.4) One color is too weak or too strong
11.5) Psychodelic color
11.6) Monitor manufacturing quality and cold solder joints
11.7) Why can't monitor manufacturers learn to solder properly?
11.8) Intermittent, flickering, or missing colors
11.9) Some commentary on monitor and TV whacking
11.10) Ghosts, shadows, or streaks in picture adjacent to vertical edges
11.11) General streaks or lines to the right of bright or dark areas
11.12) Washed out picture
11.13) Retrace lines in picture
11.14) White/gray retrace lines
11.15) Red, green, or blue retrace lines
11.16) Bad CRT causing retrace lines
11.17) Red, green, or blue full on - fog over picture
11.18) Totally white screen (probably with retrace lines)
11.19) Shorts in a CRT
11.20) Providing isolation for a CRT H-K short
11.21) Rescuing a shorted CRT
11.22) Dark picture
11.23) Brightening an old CRT
11.24) Color balance changes across screen from left to right
11.25) Bleeding highlights
11.26) Trailing lines in one or more colors
11.27) Purity problems with bright pictures
11.28) Why does the intensity appear so non-uniform in bright areas?
11.29) Brightness changes from left-to-right across screen
11.30) Picture fades in and out
11.31) Occasional brightness flashes
11.32) Occasional static, lines, spots, or other unsightly blemishes
11.33) Flickering monitor
11.34) Excessive brightness and/or washed out picture
11.35) Focus problems
11.36) Bad focus (fuzzy picture)
11.37) Focus drift with warmup
11.38) About the quality of monitor focus
11.39) Bad focus and adjustment changes brightness
11.40) Charlie's comments on focus problems
11.41) Purple blob - or worse
11.42) Color rings - bullseye pattern
11.43) Magnet fix for purity problems - if duct tape works, use it!
11.44) Color monitor only displays one color
11.45) Disappearing Red (or other color)
11.46) Interference resulting in jiggling or wiggling
11.47) Interference from electrical wiring
11.48) Interference from power lines
11.49) Interference from cross-connected buildings
11.50) Interference from other equipment
11.51) My monitor is possessed!
11.52) Shimmering image due to vibrations
11.53) Wiring transmitted interference
11.54) Jittering or flickering due to problems with AC power
11.55) My monitor has the shakes
11.56) Fred's comments on monitor interference problems
11.57) Loss of color after warmup
Chapter 12) Miscellaneous Problems
12.1) Contour lines on high resolution monitors - Moire
12.2) Moire and shadow mask dot pitch
12.3) Interference between monitor and VCR or TV
12.4) Cable installed upside-down - now monitor does not sync correctly
12.5) Isolated spots on display
12.6) Power saving problems
12.7) Monitor drift?
12.8) Monitor shuts down or goes blank at certain scan rates
12.9) Monitor flickers when disk accessed
12.10) Buzzing monitor
12.11) High pitched whine or squeal from monitor with no other symptoms
12.12) Monitor whines in power saving (standby) mode
12.13) Reducing/eliminating yoke noise
12.14) Monitor was rained on
12.15) Monitor was dropped
12.16) Really cleaning a monitor inside and out
12.17) Setup menus will not go away or hieroglyphics on screen
12.18) Setup Adjustments Lost
12.19) Monitor doesn't work after being in storage
12.20) Cheap monitors with multiple intermittent problems
12.21) Monitor has burning smell
12.22) Static discharge noise and picture tube quality
12.23) Loudspeakers and monitors
12.24) Should I replace all the electrolytic capacitors if I find a bad one?
12.25) Black powder being generated inside monitor?
12.26) Sweet little old ladies and TVs from attic
12.27) Disposing of dead monitors (CRTs and charged HV capacitors)
12.28) Apple/Sony monitor dies after variable length of time
12.29) More on the Apple/Sony 'big red capacitor thing'
12.30) CTX monitor intermittent or blows fuse
12.31) Gateway Crystalscan CS1572 jiggling
Chapter 13) Items of Interest
13.1) How do multiscan monitors determine and store the scan parameters?
13.2) Monitor reliability with SVGA
13.3) How high a refresh rate should I use?
13.4) Number of colors and monitor type
13.5) Monitors, humans, and flicker
13.6) Is fluorescent lighting a significant source of flicker?
13.7) Interlaced vs. non-interlaced monitors
13.8) Digital versus analog controls on monitors and picture quality
13.9) Should I be concerned about very frequent scan rate switching
13.10) What is monitor video bandwidth and why is it important?
13.11) Why a good monitor may produce a fuzzy picture
13.12) Ghosts - card or monitor?
13.13) Extension cables and monitor ghosting
13.14) Driving multiple monitors from a single PC
13.15) Using a PC as a monitor test pattern generator
13.16) Using a TV tuner card in a PC
13.17) What is color temperature and what does it affect?
13.18) What is this goop around some electrolytic capacitors and other components?
13.19) What does the flyback (LOPT) transformer do?
13.20) Tony's notes on setting convergence on older delta gun CRTs
13.21) Jerry's comments on convergence and other advanced CRT adjustments
13.22) Use of surge suppressors and line filters
13.23) GFCI tripping with monitor (or other high tech equipment)
13.24) Monitors on foreign power
13.25) Lifespans of Monitors
13.26) How do monitors know when to enter power saving modes?
13.27) Monitor life, energy conservation, and laziness
13.28) Thernal cycling and component life
13.29) Minimum and maximum lifespan of monitors
13.30) Methods to prevent screen burn-in on fixed format monitors
13.31) Monitors, heat, and cooling fans
13.32) Why are prices of video monitors so high compared to similarly sized TVs?
13.33) Why is the resolution of a computer monitor so much better than a TV
13.34) Combined TV and computer monitor
13.35) Problems with designing a combination TV and computer monitor
13.36) So, what about truly digital monitors?
13.37) About sync polarity options
13.38) VESA Display Data Channel standard
13.39) Identifying connections on unknown or cut monitor cables
13.40) Replacing monitor cables or connectors
13.41) Replacing the cable on an HP D1182A monitor
13.42) How can I determine monitor specifications or whether it supports SVGA?
13.43) CRT replacement worth it?
13.44) An informal history of X-ray protection
13.45) Turning a TV (or monitor) into an oscilloscope?
13.46) Displaying a video signal as a picture on an oscilloscope
13.47) Could a monitor be modified for 3D (stereo) display?
13.48) Should I use a VGA to BNC cable if my monitor has BNC connectors?
13.49) Building a 5 BNC cable
13.50) Using a workstation monitor on a PC
13.51) Tweaking the deflection rate of a fixed frequency or non-standard monitor
13.52) Displaying TV on a computer monitor
13.53) Modifying a CGA (or EGA) monitor for NTSC or PAL input
13.54) Driving multiple non-daisy-chained monitors from one video source
13.55) Displaying computer video on a TV
13.56) What is Kell factor with respect to interlaced displays?
13.57) Weird phenomenon of the month
13.58) Ultra cheap degaussing coil
13.59) Bob Myers notes on degaussing
13.60) Big Al's rules of thumb on monitor repair
13.61) Tic-Toc Tips
13.62) Monitor service and how to get some
13.63) Shipping damage 1 why monitors are like basketballs
13.64) Shipping damage 2 why monitors are like hammers (as in throw)
13.65) Shipping damage 3 why small monitors are like footballs
13.66) Shipping damage 4 so maybe if monitors were packed and shipped like eggs
13.67) Cleaning plastic monitor cases
13.68) Secret menus
13.69) Reliability and performance of refurbished or remanufactured monitors
13.70) Ron's notes on video signal quality problems
13.71) Monitor quality control
13.72) Is Big Brother watching over your shoulder?
13.73) Lament of the lack of adjustment pots on the newest monitors
13.74) Analog versus digital LCD flat screen monitors
Chapter 14) Service Information
14.1) Advanced monitor troubleshooting
14.2) Additional information
14.3) Suggested references
14.4) FCC ID Numbers of monitors
14.5) Parts information
14.6) Monitor schematics and manuals
14.7) Information sources on the Internet
14.8) Interchangeability of components
14.9) Horizontal output transistor pinouts
14.10) How do you locate the HOT
14.11) Replacement power transistors while testing
14.12) Testing of replacement HOTs
14.13) Removing and replacing the deflection yoke
14.14) Swapping of deflection yokes
14.15) Swapping of non-identical CRTs
14.16) Decayed glue in electronic equipment
14.17) Repair parts sources
14.18) Sources for adapters and cables
14.19) Monitor replacement cables

For More Details on Monitor Repair Call Us on 91-22-65001468 Mumbai India
MicroTechnologies

MicroTechnologies For all types of monitor repairs in Mumbai India Tel 91-22-65001468 www.microonline.net

MicroTechnologies
For all types of monitor repairs in Mumbai India
Tel 91-22-65001468
www.microonline.net