Lennox Split System Vs. Package Unit

HOW TO RESET EPSON CANON AND REPAIR

Tutorial on reset to the Canon PIXMA iP1700 IP1000

This is a collection of techniques and tools needed to solve the problems causing the Pixma Canoon refilled when we put PG-40 and PG-41 (1200-1700)

Steps

A) and reset the ink counter reset manually to the printer in the series (1000, 1200, 1300, 1600, and 1700 Canon PIXMA)

1. Turn the printer off and unplug the power cord. (Keep always connected the USB cable)
2. Press and hold the POWER button, plug the power cord.
3. The indicator (LED) should be green.
4. Press and release the RESUME button, the indicator (LED) should be orange.
5. Press and release the RESUME button, the indicator (LED) should be green.
6. Release the power button. "See that the head starts moving and that Windows will recognize the printer"

Note: for the printer 1500, the only difference from the previous steps will be to find the USB cable is disconnected.


B) Reset counters ink or EPROM with the software of the series (CANON PIXMA 1000-1200-1300-1600-1700):
Step forward:

1) Download the software to reset the EPROM or ink counters.
2) Unrar
3) Double click the file "general Tool
4) Click on the USB port option "only have to show an available port"
5) click the button MAIN
6) click the silver button
7) click the Remove button


Note: In the case printer's IP 1500, the difference is that before executing the above steps must connect the USB cable
.

other hand they also can occur after manual reset and run the software that the ink cartridges are empty:

So what you should do is the following:

1) Hold down the button to add a role for a minute, until they are restarted ink counters.

2) when the head is moved for the first time release the button to add paper, then when the head stops moving, press it again until it moves again.

Note: This is done when the printer is normally on, right after we have done complete the reset steps as detailed above.


Tool for CANON Printer PIXMA 1600 for 98, Me, XP

http://d.turboupload.com/d/1642124/ip1600st.zip.html


Tool Printer CANON PIXMA 1200 to 1500 for 98, Me, XP

http://d.turboupload.com/d/1642167/iP1500_Service_Tool.zip.html

Mount&blade טריינר

CRT AND LCD MONITORS

Repair
pc monitors
repair of a personal computer is usually very simple, due to its modular architecture, if, for example, a floppy drive starts to show problems, it is easier and cheaper to purchase a new try to repair it, but There is an element in the PC whose importance and cost is so high that in cases of failure if appropriate try to rescue: the monitor. This article will discuss the basics of service to these output peripherals, assuming the reader already has the required computer concepts and knows the role of video card.

tools and instruments necessary for the service PC Monitor
Before installing the description of the method of fault detection, see what are the appropriate instruments and tools to service these devices.
1) Computer PC armed and running. We can not properly check the operation of a computer monitor, if not we have a PC armed and working properly as the signal source deployment.
2) Essential for the service monitors, digital multimeter.
3) Another necessary tool for the service to monitor the oscilloscope, with which we can trace the path of the various signals on their circuits.
4) While not a device strictly necessary, it is recommended to have a frequency meter.
5) Of course, all electronic service shop should have common tools such as screwdrivers, pliers, soldering and welding equipment, degaussing coil, etc..
6) No less important are the service manuals of brands and models most common monitors.
If you have all this, service to PC monitors will be relatively simple, and more if it follows the fault detection method that we describe below.
fault detection method.
Let's see what the logical steps to follow in the diagnosis a computer monitor. Power Supply

For anyone connected with electronics, it is obvious that the first element to be checked is the source of power, do not forget that in this block which produce the voltages required for proper operation of the circuits a monitor ..
Then when you get to your shop a monitor with problems, the first thing to check is the operation of the power supply. If all this works smoothly, we can be reasonably sure that the problem is somewhere else in the unit.
Control System (Syscon)
The next block to be reviewed during the diagnosis task is system control and syscon: this circuit closely monitors the performance of almost all the blocks within the monitor. Syscon
The heart and a microprocessor, which has within it a low-power microprocessor, surrounded by supporting elements (input and output ports, circuits, timers, RAM and ROM, etc.).: And all this comes together encapsulated in a single integrated circuit, low-cost, manufacturers have been able to incorporate into their designs without impacting too much on public money. Stage
horizontal sync
might think that once ruled the power supply and the microcontroller, the first thing we would to do is start tracking the color signals to the monitor, but it is better to start with the horizontal sync phase, because in its output are the high voltage transformer.
As mentioned, the horizontal sync pulses coming directly from the video card that is, you just have to get them to the horizontal oscillator to generate the ramp, sending the driver H & H finally reach the exit, where they are connected both the deflection yoke and the Fly-Back. Stage
vertical sync
If you checked properly the operation of stage H of the monitor, now check the performance of stage V. Compared with the block H, managing the vertical bar is surprisingly simple, so it will not cost you more work to track the different signals within this section, and detect any abnormalities from the V input pulses to the generation of V sweeps that are sent to yokes. Color Management

We left the final stage of color management, because a bug in it does not block the overall operation of the system (a problem that they can generate all the other blocks), in the worst case We face a monitor on, which has trace on the screen, but growing video information.
To diagnose the stage. Just use a oscilloscope faith to make a crawl from the entrance of the video card to output amplifiers color, the goal is to ensure that the signal suffers no defects or lost at any given time.
Kinescope .
We left the final appearance of screen, with the understanding that it is considered failure in this device, for example, a magnetized shadow mask, purity and convergence errors, failure to focus, etc. And given that these problems can be eliminated by methods already known to all electronic service technician, not expand on the subject. If you find a defective picture tube, it is best to suggest to the customer buy a new monitor, the reason is that as these devices are highly accurate, are generally not well when they are "repaired" (plus the cost of a new picture tube is almost equal to that of a new monitor).
As you can see, the steps for troubleshooting on monitors is well structured, ranging from those blocks that directly affect the overall operation of the system to others who may presentarfallas hardly noticeable.
We recommend you practice on various makes and models of monitors, and you will see that all the steps are the same.

And do not forget to apply the hypothetical-deductive!

Magda Czarnecka gliwice

INTEGRATED CIRCUIT STRUCTURE REPAIR OF HARD DRIVES

TL494 DESCRIPTION The TL494 incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power supply control, this device offers the flexibility to adapt the power supply control circuit for a specific application. The TL494 contains two error amplifiers, adjustable oscillator on a chip, a dead time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, \u200b\u200b5% accuracy of the regulator and control of the output circuits. The error amplifiers exhibit a common mode voltage range of -0.3 V to VCC - 2 V. The dead time control comparison is an offset that provides approximately 5% of downtime. The on-chip oscillator can be omitted ending the RT reference output and providing a sawtooth input to CT, or can make common rail circuits in synchronous multiple power sources. The uncommitted output transistors provide common emitter or emitter-follower output capability.
The TL494 provides for push-pull or single ended output operation, which can be selected via control output function.
The architecture of this device prohibits the possibility of output pulses twice during push-pull operation. The TL494C is characterized by C. The TL494I is characterized by 70 ° C operating performance C. 0 ° C to 85 ° -40