Learn troubleshooting and repair of CRT television from the technician work bench point of view
Dear Electronic Repairer,
CRT Television repair course is an E book covering all the major building blocks in CRT Television with emphasis given to real life scenario from the technician work bench and therefore provide a very good starting point for new students in electronics and also a reference book for those already in the field.
The book is divided into two parts:
Part one: is composed of 18 chapters of the major circuit blocks in CRT TV and explains basic functions and common problems associated with these blocks.
Part Two: is composed of 10 chapters of pure real life repair histories from the technician work bench.
The book is illustrated with numerous color photos to make the reader learn faster and get the concept pretty fast.
Every Chapter is hyperlinked to the list of content for easy navigation within the book for those who decide to read the book directly from the computer screen.
List of Content
Chapter 1: Introduction to Television Repair Career
Chapter 2: Component found in the Power supply (S.M.P.S)
Chapter 3: Understanding S.M.P.S sub units
Chapter 4: Solving power supply problems (s.m.p.s) using control IC.
Chapter 5: Solving power supply problem for Television using transistor instead of control IC.
Chapter 6: Understanding the Secondary power supplies
Chapter 7: Main power fuse keep on blowing
Chapter 8: Do it yourself series lamp current limiter
Chapter 9: Using the series bulb for find shorted component on the primary supply
Chapter 10: Understanding the Horizontal circuits
Chapter 11: understanding fly back transformer
Chapter 12: H.O.T getting shorted after replacement
Chapter 13: Understanding and troubleshooting Color problems
Chapter 14: Understanding and troubleshooting Vertical circuit
Chapter 15: Understanding and troubleshooting the Audio circuit
Chapter 16: Understanding and troubleshooting the Tuner circuit
Chapter 17: Understanding and troubleshooting the micro processor
Chapter 18: Understanding and troubleshooting the remote control
Real life repair histories
Chapter 19: LG Television NO Picture- Audio OK blue background
Chapter 20: Panasonic TV model TC-14E1T with intermittent single horizontal line (blue)
Chapter 21: Gold star TV vertical partially closed
Chapter 22: Samsung Television dead
Chapter 23: JVC 14'' DEAD after a voltage surge from a Generator
Chapter 24: GLD TV Field Collapse with a single horizontal line
Chapter 25: JVC Television Dead 21”
Chapter 26: china TV with No Power symptoms
Chapter 27: Sony TV 1902 GE.NO Picture NO sound only screen display i.e. channel Number
Chapter 28: Conclusion
Countries where this book has sold includes...
This eBook comes with my full support...so if you have any issue just send me the Television model and Symptoms and there we go!!
Here is an example of a live case support between me and a customer from Philippines.
Roger: sir, thanks for the reply, I am really amazed by your eBook, it’s very nice as a beginner in this fields of electronics, sir, and can I ask you about my 14inch. TV polytron, no audio and no picture, when I switch on only horizontal lines appear from top to bottom, pls. advise me sir.Thanks...God bless....
Humphrey: For the TV with retrace lines...First adjust the screen voltage on the fly back transformer bottom knob (refer to chap 11 of your eBook and see if they disappear) also check the RGB supply voltage (see details on chap 13 of your book). Please relax and read the book slowly and carefully...don't rush... for the other TV...try another connector for the DVD but make sure yellow connector on TV go to yellow connector on DVD. Yellow is always for video..... Also be sure the TV is set to A/V mode.
Roger :sir, good day, I check already, this polytron 14 inch tv,,the supply coming from the flyback,when I do voltage testing I get only 156v, supposed to be 185v am I right? sir?, may I share to you the history when I first checked this TV, I re- soldered dry joints at the fly back...and I adjusted the screen knob, and the TV was ok, but after 5days the fault is back to his former fault, as of now I test also all secondary output voltages but I notice some readings low...I try your advice to check the voltages at the RGB at CRT neck board if i have time......as of now i try to adjust the screen knob, but only the brightness going up and down but no display appear read, I am reading your book as of now, it’s very nice book sir,,,
Humphrey: Now we are getting somewhere...the 156 volts for RGB supply voltage is definitely low...this could point to a filter capacitor for that line that has developed high ESR (dry up) please replace the filter capacitor for that line(usually rated 250 volts in your case 4.7uF/250V and change that directly...also if you disconnect one of its leg from the circuit and the voltage goes up means indeed it is faulty...please be sure you have come back to me with the progress. Again remember you adjusted the screen voltage upwards and therefore you will need to bring it down so that the line should fade away.
Please see the diagram for more info.
Best of luck Roger
Roger : ok sir, ill check the caps,,,,thanks
Humphrey: This TV should be working by now....see the picture for more details...
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