Monitor tuneup?
(From: Bob Myers (myers@fc.hp.com).) Most manufacturers will quote an MTBF (Mean Time Before Failure) of somewhere in the 30,000 to 60,000 hour range, EXCLUSIVE OF the CRT. The typical CRT, without an extended-life cathode, is usually good for 10,000 to 15,000 hours before it reaches half of its initial brightness. Note that, if you leave your monitor on all the time, a year is just about 8,000 hours. The only “tuneup” that a monitor should need, exclusive of adjustments needed following replacement of a failed component, would be video amplifier and/or CRT biasing adjustments to compensate for the aging of the tube. These are usually done only if you’re using the thing in an application where exact color/brightness matching is important. Regular degaussing of the unit may be needed, of course, but I’m not considering that a “tuneup” or adjustment. • Back to Monitor Repair FAQ Table of Contents.
(From: Bob Myers (myers@fc.hp.com)). Most manufacturers will quote an MTBF (Mean Time Before Failure) of somewhere in the 30,000 to 60,000 hour range, EXCLUSIVE OF the CRT. The typical CRT, without an extended-life cathode, is usually good for 10,000 to 15,000 hours before it reaches half of its initial brightness. Note that, if you leave your monitor on all the time, a year is just about 8,000 hours. The only “tuneup” that a monitor should need, exclusive of adjustments needed following replacement of a failed component, would be video amplifier and/or CRT biasing adjustments to compensate for the aging of the tube. These are usually done only if you’re using the thing in an application where exact color/brightness matching is important. Regular degaussing of the unit may be needed, of course, but I’m not considering that a “tuneup” or adjustment.
• 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 conve
