Battery Review and Tips

In general, the display of the typical faults are usually inserted as virtual card, power supply problems caused by electrical fault and the CRT, so take this opportunity to brief you on all three aspects of knowledge.

Virtual card inserted fault

If you start work, the display is sometimes normal, sometimes the screen does not display any information, and monitor power light is always the normal direction. At this time, you do not have to strain to think that the monitor is a problem, this phenomenon is between the host and monitor signal transmission failure. Because the TOSHIBA PA3383U-1BRS Battery power display is always normal, so the only signal a problem.

1. Check the signal line, connected everything is normal, then open the host of the chassis shell, found some loose video card, carefully check the notice inserted in the display card expansion slot is empty, showing poor contact between the card and slot before is there such a phenomenon;
2. The solution is a good graphics card inserted, tighten the nut;
3. And then reboot, after a period of observation, that is no longer just problems;
4. Finally, after determining all normal, shut down the host’s chassis cover installed.

Power circuit failure

Power supply circuit is to monitor the maintenance work an important part of the circuit in the entire display occupies the first place. Most switching power because of the monitor, so this power failure was mainly due to irregular power supply and power supply interruption caused by the two aspects. A typical display after power failure phenomenon is neither grating nor images. This is most likely a problem of total power, or the line output circuit is not working properly. So, you need to control the state through the insurance to determine whether good or bad power circuit failure.

1. Open the cover and found the fuse intact, no color, no smell. That there is no short circuit power, line output circuit failure is caused by poor. (Line output circuit is more complex, there being no introduction.)

2. Insurance tubes disconnected, no color, no odor generated. That SONY np-ft1 battery power may be not very serious fault, should be the rectifier bridge rectifier diodes in the breakdown of the two.

(A) determine the diode is good or bad
With a multimeter R × 10? And R × 100? Range measuring positive and negative diode resistance, positive resistance is 1k?, And the reverse resistance is infinite, are basically normal. If the forward resistance infinite, while the negative resistance is not, you can explain the diode circuit.

(B) replace the diode
The first electric iron will be replaced fully melted solder on the diode, and then suck out the solder, then remove from the circuit board to, then good diode (be sure to replace the diode with the specification model is identical to) the correct positive and negative direction of welding to the appropriate location.

Note: that although it is very simple, but when operating together, we must be especially rigorous, particularly the use of electric iron. Soldering iron should I use 20W ~ 40W, and too easily damaged to the integrated circuit or printed circuit board; same tip to be in use before filing into the tip to reduce the welding of the contact area. In addition, there is little to remind you: All the security operations must be undertaken without COMPAQ PRESARIO 2100 Battery power.
Replace fuse

(C) carrying out the above two steps, do not think that has been done in the end will also need to replace the damaged fuse out.

(D) replacement of damaged components well above after the power output termination dummy load on the 300? / 50W, test power, power supply output voltage is 110V, that everything is normal, then the load removed.

(E) completion of the above work, you can start checking. If you find the fuse off again, but just do not occur in other failures occur (ie: only fuse damage), which is probably due to small capacity caused by the fuse. Just a small amp fuse can be replaced by a large amp to solve this problem, such as: the replacement fuse 2.5A 3.0A’s. Start work again this time, symptoms will disappear completely.

3. Insurance tubes off, and black, and possible problems.

That power has serious short-circuit fault, may be the power switch before the transformer primary coil circuit failure, more likely to switch between the collector and the emitter is the breakdown.

(A) determine the transistor’s pin

The method used to determine only two transistor pins: observation and measurement multimeter. In general, to be used are standard transistor structures, so the shape of the SONY pcga-bp2v battery arrangement under the pin can be identified clearly.

There are two common types: pin-up head down, bottom edge to her, near the end of round black spots for the emitter (e), followed by extension of the base clockwise (b) and collector.

The flat side of the plastic shell to himself, below the pin for the emitter (e), the middle base (b), the top is the collector

(B) identification of good and bad transistor

Learned “circuit-based” may know, with a multimeter is a fast and accurate measurement methods. If the measurement of PN junction forward resistance is infinite, that inside of the pipe circuit; if the PN junction reverse resistance to 0, or between the collector and the emitter resistance to 0, is that this tube has been breakdown or short circuit; if PN junction of the forward and reverse resistance or less resistance, or between the collector and the emitter resistance is small (but not 0), then the tube is completely ineffective. If these three conditions to prove that the transistor to be replaced.

Transistor Replacement

Similarly with the replacement of the diode, the first electric iron will need to replace the transistor fully on the solder melting, and then suck out the solder, and then dell inspiron e1505 battery clamp the transistors from the circuit board, unplug, and put a good transistor in accordance with the correct pin position welding to the circuit board corresponding place.

(D) replace the fuse (with the “2″ in (c) the same way)

Tube failure

The quality of CRT monitors can work for also has an important influence, also should arouse everyone’s attention.

1. CRT glass shell broken.

The symptoms showed no raster, no picture, picture tube inside the ignition, accompanied by color glow.

2. Leakage or touch the pole

If the cathode tube collides with the gate pole, will make the corresponding electrode beam current increases, the grating will be a corresponding color of the electrode grating, making the brightness control, and there is a serious flyback lines. Touch the pole or tube leakage occurs because the tube containing impurities, and electron gun kodak klic-7002 Battery technology is poor. Spark discharge method should be adopted to be eliminated. (More dangerous practice, it does not describe.)

3. Poor vacuum tube. This will result in tube ignition, focusing not allowed, even with the brightness of the image to open large size will become larger.

4. Kinescope aging and failure. Display is running, if found after the beginning of the tube in the boot of a dark period of time the brightness, the image is weak, turn up the brightness is to focus worse. Then after a period of time or some of the filament voltage can be increased to normal, and this is one of the cathode tube aging or aging symptoms.

Typical characteristics are:

(A) Turn the monitor power, after a very long time to display there will be a grating;
(B) Turn the monitor power, then the brightness at maximum, the display of the grating and the image is still very short;
(C) shows the image sharpness variation, severe defocusing;
(D) can distinguish between the image brightness is low, and increase the brightness will have defocusing phenomenon;
(E) CRT display blue gun cathode aging, grating side yellow; green gun cathode aging, grating purplish; red gun cathode aging, grating side blue. (This feature is common, attention should be paid if found.)

If it is determined CRT is aging, it should ask the appropriate personnel to replace, so do not adversely affect normal operation. Monitor is a precision electronic equipment, and contains high-voltage circuit inside. Whether it is human, or on the display, open the display case is a high risk business. Therefore, in the absence of professionals under the guidance of the reader not to disassemble the cheap dell batteries display components. About the content of this article is to help our readers understand the principles of discrimination and ideas fault monitor to determine treatment measures. As for the real hands-on, ordinary users even know how to do, it is difficult to find the parts and maintenance tools. Therefore, the display of the service is essential.

Monitor long-term placement in a variety of complex environments, vulnerable to environmental factors, including temperature, humidity, cleanliness, electromagnetic interference, electrostatic, and power supplies. Therefore, the user must understand and master the knowledge of the display of the general maintenance and repair methods.

1, the humidity factor

Humidity of 30% to 80% Dell studio 1735 adapter monitor can work, but once the indoor humidity above 80%, the monitor will produce condensation inside. Its internal coils for power transformers and other easy to produce leakage after wet, mold may even break the connection; and display area are easy to produce high-pressure discharges; machine components, rust, corrosion, serious cause circuit short-circuit boards. When the indoor humidity ≤ 30%, will display some of the mechanical friction generated static electricity, the internal components of the increased possibility of damage by static electricity, can affect the display work.
Therefore, the display must pay attention to moisture, long time do not display, you can power on a regular basis working for some time, to monitor the heat generated when the work will drive out the moisture inside.

2, light elements

If the display by the sun or bright light, easy for a long time to accelerate the aging of sony np-bg1 charger CRT phosphor and reduce the luminous efficiency (in the bright light this environment, the face displays the work of the staff, the eyes are also vulnerable to injury).
Therefore, the user should not be placed in the monitor where the strong sunlight; or the light must pass through the place, hanging pieces of dark cloth to reduce its light intensity.

3, the dust factor

As the high-pressure monitors up to 10kV ~ 30kV, easy to attract such a high voltage dust particles in the air, the threat of dust on the computer is obvious. A lot of maintenance practices that, in dusty environments, the printed circuit board will absorb dust, the dust will affect the deposition of heat from electronic components to make circuit boards and other components of the temperature rise, resulting in leakage and burn components. Dust may absorb moisture, corrosion, electronic circuits inside the monitor, causing some strange problems. Therefore, although the small size of dust, but the display is unpredictable hazards.

In the prevention of dust hazards, first of all dell inspiron e1505 adapter monitors should be placed in a clean a clean environment, but the dust is pervasive, so it should be given to purchase a dedicated monitor dust cover, each time after use should be cast with the dust cover. Usually clear the dust on the display screen, remember the power should turn off the monitor, you must also unplug the display power and signal cables, and then use a soft, dry cloth to wipe out from the center of the screen, do not use alcohol and the like chemical solution to clean, also can not use rough cloth, paper of all kinds of items to wipe the screen, and do not spray liquid directly onto the screen in order to avoid moisture intrusion inside the monitor. In addition to the display outside, but also used the brush, small vacuum cleaners often erase the display of dust and dirt on the case, but try not to use water on a damp cloth wipe. Since the internal display has a high voltage (power off after the ignition coil may still be more than the power), such as to remove its internal dust, must ask professionals to operate, can not open the display cover privately to avoid serious consequences.

4, the magnetic field factor

Electromagnetic interference is a circuit or the environment there should not appear in the voltage and current. Power sources of electromagnetic interference, sony np-fg1 charger, components, wires, connectors, cooling fans, fluorescent lights, lightning and electrostatic discharge, as well as TV sets, refrigerators, electric fans and other power-around or other appliances, such as unshielded speakers or Phone or pager from the monitor too close to both the existence of electromagnetic fields. These devices generate electromagnetic interference, over time, can display chaos.
Long-term exposure may be magnetized in a magnetic field or damage the monitor (especially the early displays, and more without the degaussing function), it should be the monitor in a place far away from other fields. Usually subject to conditions, may often use the degaussing button on the display, but note that one should not use it over and over again, can not too much force, otherwise will damage the monitor.

5, the temperature factor

CRT as a display of a major heat source, high ambient temperature in the work of its performance and service life will be greatly reduced, probably because some of Weld’s joints caused by solder melted off open, so that the display job insecurity, while components also accelerated aging, and ultimately lead to the dell studio 1555 adapter display ranging from “strike”, while in other components may be breakdown or burn.
Therefore, placing the monitor around to leave enough space to let it “breathe.” In the hot summer months, as conditions allow, the best place to monitor air-conditioned room, or fan blowing.

6, in use for attention

(1) Be careful not to put their things on the monitor, the monitor may affect the one hand, the normal cooling, two aspects in order to avoid falling debris damage to the machine.
(2) moving the monitor, do not forget the power cable and signal cable unplug, and plug the power cord and signal cable should be shut down to prevent damage to the interface circuit components.
(3) in the regulation function knobs on the display panel, you should slowly and steadily, not a hard switch to turn fierce, to prevent damage knob.
(4) plug the monitor power cord or signal cable should pay attention, because most of the display problems are encountered, or by exposure to adverse environmental impacts caused. If the monitor shows the color will result in poor contact or can not reduction simultaneously. Bending a pin plugs can cause the sony np-f970 charger monitor can not display the contents of heavy, ranging from bias can not display color or a color, and may lead to roll up and down the screen. This problem is very troublesome, because if the correct pins may make the curved pin to break.
(5) display the same content as often for a long time, can be installed on your computer screen saver to prevent phosphor aging.
(6) display such as a cable pull too far, may decrease the brightness of the display, and the rays can not focus.
(7) If the screen image shake, the most likely reason is the interference of external magnetic field, such as the magnetic field generated by the transformer. Line frequency is too low, the supply voltage is too high, it may cause a sudden no display screen, which happens because the monitor high-voltage protection. When a high voltage protection, you must immediately shut down, such as voltage stability after a few minutes to boot to work again.
(8) Although the scope of the display battery shop of the operating voltage to adapt to relatively large, but it may be due to the impact caused by transient high pressure component is damaged, they still should be used with the fuse socket. If conditions permit, preferably with a UPS (uninterruptible power supply).
(9) Use, you can slightly reduce the display brightness (right), can also slow the picture tube filament and phosphor decay.
(10) can be installed in front of a screen for radiation protection devices, the best selection of lead shielding grounding conductor technology. Good quality products, can prevent over 90% of electromagnetic radiation, and can enhance the contrast of the display, enhanced clarity of display, but also eliminate static electricity discount camera batteries and glare, absorb UV light. Thus, not only to protect human health, the display is also good.