|
Welcome to the GSM-Forum forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. Only registered members may post questions, contact other members or search our database of over 8 million posts. Registration is fast, simple and absolutely free so please - Click to REGISTER! If you have any problems with the registration process or your account login, please contact contact us . |
|
Register | FAQ | Donate | Forum Rules | Root any Device | ★iPhone Unlock★ | ★ Direct Codes ★ | Direct Unlock Source |
Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
| LinkBack | Thread Tools | Display Modes |
01-23-2012, 05:38 | #1 (permalink) |
No Life Poster Join Date: Jan 2007 Location: Afrique du sud Age: 42
Posts: 3,052
Member: 430612 Status: Offline Thanks Meter: 301 | How to test a capacitor? or share your ticks |
The Following User Says Thank You to luyanda For This Useful Post: |
01-23-2012, 10:20 | #5 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | How to Check Resistors? Read the indicated code value indicated in Schematic Diagram then select the Ohm-scale within but not way below the indicated value. A resistor is good if its resistance is close to the indicated value.Tolerance should be considered with the ohmmeter reading. While, no resistance reading at all on the ohmmeter scale settings means that the resistor is open. A zero resistance reading on all ohmmeter scale settings means that the resistor is shorted. |
01-23-2012, 10:20 | #6 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | How to Check Capacitors? In most cases, a capacitor fails due to the deterioration of the dielectric material between its plate.Defective capacitors can have an internal shorted terminals, excessive leakage and degradation of capacitance meter. For an electrolytic capacitor (capacitors with polarity), short the terminal capacitor to discharge it prior to testing. To test a capacitor, set the multimeter to Rx10 or Rx1K scale. Connect the tester negative probe to the capacitor positive terminal and the positive probe to the negative terminal. |
01-23-2012, 10:21 | #8 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | How to Check Diodes? Set the multimeter knob to any of the resistance position (x1, x10, x1K or 10K ohm ).Connect the positive probe to the anode and the negative probe to the cathode.Then connect the positive probe to the cathode and the negative probe to the anode of the diode. A good indication in the first procedure will show the meter deflected very little or may not deflect at all. And in the second procedure, the meter will deflect towards zero.The actual resistance reading is the forward resistance of the diode. A defective indication shows that the meter won't deflect at all even when the probes are reversed. Or the meter deflects at the same time or almost the same resistance reading for both steps. |
The Following User Says Thank You to helpful-man For This Useful Post: |
01-23-2012, 10:22 | #9 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | How to Check Transistors: Bipolar transistors are usually checked out of a circuit by means of an ohmmeter. When it is desired to check for the resistance across the transistor emitter and collector, NPN or PNP, ohmmeter probes may be connected either way. A good transistor will show above a reading above 1000 ohm. How to determine if it is NPN or PNP transistor? To determine the correct terminal of the transistors, set the range selector to x 1 or 10 ohm.Connect the positive probe to the emitter and the negative probe to the base of the transistor. Note the reading interchange the connection of the probes to the leads of the transistor. Base your conclusion on the table: POSITIVE PROBE TO: -----NEGATIVE PROBE TO: -----RESISTANCE READING-- CONCLUSION: Emitter------- -- Base---------- Less than 150 ohm ------Transistor is NPN Base --------------Emitter --------Infinity ----------------Transistor is NPN |
The Following 2 Users Say Thank You to helpful-man For This Useful Post: |
01-23-2012, 10:23 | #10 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | POSITIVE PROBE TO: NEGATIVE PROBE TO: RESISTANCE READING: CONCLUSION: -Emitter------------Base ---------Infinity ---------------- Transistor is PNP Base --------------- Emitter --- - Less than 150 ohm ------- Transistor is PNP Some defective indications of transistors: Resistance between any pair of the terminals is less than 10 ohms, means that the transistor is shorted. Resistance between base and emitter or base collector for both the forward and reverse application of ohmmeter probes is infinity (meter needle don't deflect), means that the transistor is open. Transistors overheats (except power transistors) during normal operating condition means that the transistor is shorted. |
The Following 2 Users Say Thank You to helpful-man For This Useful Post: |
01-23-2012, 10:25 | #13 (permalink) |
No Life Poster Join Date: May 2010 Location: BANGLADESH Age: 43
Posts: 2,667
Member: 1306751 Status: Offline Sonork: 100.1604993 Thanks Meter: 4,916 | How to Check a Fuse? A SMD Fuse is not visible to our ***** eye, just set the multi-meter to x1 and put both test probe to both end side of the fuse. A full reading here to zero or continuity check is full. without any reading means the fuse is already busted. How to Check IC chips (Integrated Circuits)?IC Chips is hard to determine faulty by using only a multi-meter, some advance equipment like the one that the manufacturer used during their productions. However; you can determine a faulty chips by some few experiences when it comes to troubleshooting, One techniques is that by comparing two same components from one another. like for example; if one chips is suspected to be faulty, then by replacing it with a good and working same chips, you can now determine it if the said chips got a problem. It is a trial and error method at first; but as long as your experience and knowledge skills increases, you can determine it more quickly and accurately. Further, we will tackle this issues and give you some tips and tricks. |
The Following 2 Users Say Thank You to helpful-man For This Useful Post: |
Bookmarks |
| |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
news headlines to gsm phone | mos | Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) | 7 | 05-22-2016 11:42 |
How can I do a Welcome note for my 6110 a dosn't have any one ? | Viper | Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) | 8 | 06-27-2015 11:57 |
How to add a language in 51xx/61xx | tati | Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) | 8 | 05-21-2013 19:20 |
How to upload a new firmware... | Brand | Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) | 8 | 06-08-2012 18:29 |
Copy from one 6110 to another | Leif Nielsen | Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) | 1 | 06-10-1999 22:36 |
|