Question about Gateway FPD2275W LCD Monitor

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Microcontroller not give signal or faulty

Micontroller faulty

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  • jamesyankee7 Aug 09, 2008

    the monitor will not come on acts as if getting no power



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1 Answer

I need its datasheet to connect it to microcontroller and give pwm pulses...can anyone give it or tell me how to connect its four terminals

the four wires will be 0V, 12V (from supply), and a sensor to sense speed (I think this is a voltage o/p proportional to the fan speed). The fourth wire with be the PWM signal to control the fan speed (input to the fan)
see Motherboard CPU 4 Pin Fan Connector Pinout AllPinouts

Feb 19, 2016 | AVC DE07015T12U 70mm Fan

1 Answer

Our system says it does not recognize any recordable dvd we've tried. Suggestions?

First...try to unplug the unit...and re-plug the unit a few time..that May reset the Microcontroller inside the recorder. Second..put a DVD movie inside and see if the recorder respond properly, if the DVD.

If that not could be the Microcontroller and program maybe guess

Mar 09, 2015 | RCA DRC8300N DVD Recorder/VCR

1 Answer

Viper 550esp

you must open the rem.con and clean the keypad switch, for dirty, dust, oxide, open contacts, CLOSED CONTACTS, or bad contacts.
test and clean with contacts cleaner. REMEMBER they send infrared signal to the SYSCON microcontroller from the receiver in this case ALARM.
If the problem persist, you must call to the company to the Alarm, since the Alarm has Syscon Microcontroller two options can be happen a) power supply defective b) Syscon Microcontroller y/o peripherical circuit faulty.
God bless you

Jul 29, 2012 | Televison & Video

1 Answer

Flashing AV signal on Pentax SLR

1) i recommend test the batteries that are o.k replace or recharge in full.

2) if this do not resolve the problem, the flash or the control circuit (Syscon)is faulty. you must go to the repair shop for fix it. Since this micro device electronic with the microcontroller, is NOT easy fix it , for anyone, you must know something about digital electronic and repair.

God bless you

Jul 21, 2012 | Pentax *ist D Digital Camera

1 Answer

The Vizio BR player worked fine last week. Now, I have sound, but no picture. Nothing has been changed

1) you must clean the dvd player with disk player, you can buy in radio shack.
2) if this NOT must test the OPU.
3) Opu optical pick up included the lasser bean, for read the TOC of DVD.
4) OPU can be defective.
5) see if the servomechanism motor are moving :a) search b) tracking c) sledge d) CLV are working, this move to the disck contant speed for the microcontroller send the signal.
6) finally the RESET block, is faulty.
7) or Microcontroller defective.
8) If you can not test this go to the repair shop TV for fix it. see the block
God bless you

Jul 16, 2012 | Vizio VBR220 Blu-Ray Player

1 Answer

Magnavox rs2566 b101 will not turn off using the remote or from the set have to unplug it.

1) test the r.control reset the code from instr.manual download from or www.
2) the sensor from TV can be faulty, test with VOM
3) clean the contacts batteries well with contacts cleaner
4) tight the spring contacts with pliers for better contacts
5) change the batteries by new ones
6) resolder the wires contacts.
7) open the r.control and clean the keypad switch, they work in matrixs, sending signal from infrared to the microcontroller for the TV.
8) if doesnot work go to the repair shop TV for fix it
God bless you

Jul 12, 2012 | Televison & Video

1 Answer

Open Harmony 659

1) you must open the r.control, and clean the keypads switch contacts from oxide, dirty, corrosion.
2) remember this switch work in matrix design, that send signa infrared to the microcontroller from devide, if the signal is not ok the device will not work , since the microcontroller will NOT interprete any signal, and consequently BAD signal will not Work for the CPU.

God bless you

Jul 11, 2012 | Logitech Harmony 659 LCD Remote Control

1 Answer

I have a Sanyo plc-xt25 LCD Projector and when I plug my ac cord in, the fans turn on but no lamp comes on. I changed the lamp and still no picture. What do I do?

Every projector lamp is equipped with ballast. The problem area is ballast. Either the ballast is not getting DC supply or the lamp turn ON signal from the projector main board or the ballast is faulty. Remove the lamp. Connect the projector to the mains supply. Check the voltage at the lamp connector inside the projector without turning it ON. It should be around 65 volts A/C. (Warning: Multimeter will get damaged if the projector power is turned ON due to generation of high voltage) If you find this 65 volts then it confirms that it has DC supply & the ballast is functioning. The ballast receives the the turn ON signal from microcontroller through opto-coupler on the ballast. The ballast opto-coupler can be checked by providing external 5V DC supply between pin 3 (+ve) & 4 (-ve) in turn switches ON the lamp. If this works then there is no problem with your lamp & ballast. The problem lies with the main board. If this does not solve your problem then give me the feedback.

Aug 04, 2011 | Sanyo PLC-XT25 LCD Projector

3 Answers

Keil compiler

ya keil is a software which used for making hex file for microcontrollers and after that we insert this file to microcontroller by assembler .in keil you hv to use a c similar language.i am expert of embeeded system if u hv any further quiery then u can call me also at 9811613568

May 19, 2008 | Computers & Internet

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