29″ CRT TV Philips Problem Solved!
I have a 29" CRT TV of Philips, PT2452/94S, which had arching problem at the base of the LOT cable that goes to anode of the tube. Since a good LOT as replacement was not available, I decided to patch up the leak. First of all I discharged the anode at CRT end, removed the connector, tied an insulation tape at the puncture, and inserted an insulation sleeve taken from a piece of underground telephone cable, which was a tight fit. Then I slid on a piece of petrol tube that is used in two wheelers, covering the entire cable upto the CRT connector.
Refit the anode cap, switched on and TV started working, but switched off after a few seconds. In service mode, error code was detected as 11 (problem in RGB). Replaced TDA6107 at the CRT PCB. Adjusted the focus and screen control to its optimum. Set worked fine. As a routine measure, I replaced all the 48 Electrolytic capacitors and also some of the high voltage capacitors around LOT. Set now works like a brand new one!
The above article is contributed by Parasuraman S
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beh
July 6, 2012 at 6:13 pm
HI Parasuraman S
thanks please add pictures of the above repaire
beh
Jestine Yong
July 6, 2012 at 8:10 pm
Hi Beh,
Actually I have asked for the picture but he told me that he had fixed everything and at the moment not possible to remove everything again just to take pictures.
Jestine
beh
July 6, 2012 at 10:59 pm
HI JESTINE
HI Parasuraman S
camera must be ready always time is flying . only pictures can freez the time.
thanks
beh
Waleed Rishmawi
July 7, 2012 at 8:11 am
yea, I wish he had pictures too. I have delt with the same kind of problem and worked for a month or two then the problem started again. I just wanted to see if I did the same thing he did or not
mustabz
July 25, 2012 at 9:49 am
48 capacitors!!!!!!!!!! man you one patient guy. congs and thanks for the tip.
lance
September 7, 2012 at 9:48 pm
i have a problem about a branded tv the problem is if you turn on the tv i'm waiting more than 30minutes b4 i watch the attitude of my tv is if you turn on the power the video will appear after few minutes the video is off now i try to check the main board of my tv i concentrate at power supply section because i'm thinking maybe the output supply is low power.. and i have suspicious device 7n65c power transistor but i'm not sure if i replace that device what happen next can you help me about my problem and to other to know better the 7n65c is the one cause of giving low power and what is the replacement of that device thank you very much and i hope can you help me...............
Jestine Yong
September 9, 2012 at 3:55 am
Hi lance,
You meantioned that you need to wait more than 30 minutes in order for the display to appear. Have you check the heater whether have light the moment you turn on the tv? What about the g2 voltage? What is the volatge?
Jestine
el nino
October 16, 2012 at 1:22 am
i have a 29 inch tv 29PT2252/68R which keep turn off after few second. I had change my flyback but its still same keep turning off.
Jestine Yong
October 17, 2012 at 5:25 am
Hi el,
Is the power still there after the display turn off? If yes then what is the color of the power led?
Jestine
el nino
October 18, 2012 at 3:25 am
hi Jestine,
the led didnt indicate any color.There is no any supply when the display turn off.
Jestine Yong
October 19, 2012 at 9:39 am
Hi El,
You mentioned that the power LED is red in previous post but at the same time you mentioned it has no output voltages? If there is no output voltages this mean the power supply shutdown after went through high voltage. You need to check the optoisolator ic area for bad components.
Jestine
el nino
October 24, 2012 at 2:02 am
the power LED didnt indicate red when i switch on the supply but It just turn on with display for few second and then shut down it self.
Jestine Yong
October 24, 2012 at 9:14 pm
Hi El,
If after shutdown no output voltages from the smps then you need to check the components surrounding the optoisolator ic area. Check also for the vcc supply to the power ic in the power primary side. The supply should have regardless if the tv shutdown or not.
Jestine
el nino
November 1, 2012 at 2:22 am
hi Jestine,
I hv check the components surrounding the optoisolator ic. I found the input voltage for smps drop from 18 v to 13 v when it shut down.
Jestine Yong
November 2, 2012 at 3:07 am
Hi El,
If the power LED does not have light and the voltage drop from 18 to 13 volt then you need to check on the tv cpu. The tv cpu must get 5 volt and the power led must light up either green or red. If the power led did not light up most probably the cpu is at fault.
Jestine
el nino
November 3, 2012 at 1:56 am
Hi Jestine,
thanks for your assist. Finally i could solve the problem.
Jestine Yong
November 3, 2012 at 9:40 am
Hi El,
Congrat! What is the cause of the problem?
Jestine
el nino
November 5, 2012 at 9:22 pm
tv CPU..no output voltage for LED
Jestine Yong
November 5, 2012 at 9:30 pm
Hi El,
Ok thanks.
Jestine
danial
November 10, 2012 at 3:15 am
Hi Jestine,
I receive a tv and the model is toshiba 2135DE. The problem is that the tv does not have sound but the display is fine. Can you help me to solve this problem.tq
Jestine Yong
November 12, 2012 at 8:28 pm
Hi DANIAL,
Make sure there is supply voltage to the audio ic and the ic is not too hot. In some cases the eeprom corrupted data could cause lost of sound.
Jestine
danial
November 14, 2012 at 9:39 pm
Hi Justine,
The input supply is there for audio ic and the reading is almost 20v but got no output. Should I replace the ic?
Jestine Yong
November 14, 2012 at 11:02 pm
Hi Danial,
If you have the scope you can check for the incoming signal. If there is no incoming signal then there will be no output even if you have replaced the audio IC.
Jestine
ajay
February 7, 2015 at 9:09 pm
Phillips 29crt tv starting problame
Jestine Yong
February 9, 2015 at 9:28 am
Hi Ajay,
What is the problem?
Jestine
Oging
June 4, 2016 at 9:15 pm
Hi ser jesten have a problem.
My crt aiwa tv with power but a few second is shutdown what is the problem sir...
Hope you help me bout this.
More thank sir.
Jestine Yong
June 6, 2016 at 1:12 pm
HI Oging,
It can be due to power supply itself have problem or something shorted/leaky in the secondary side. You may need to visit the link below to isolate the problem:
https://hplibya.files.wordpress.com/2011/11/2957819-tt204-identifying-television-smps-problems1.pdf
Jestine
zaheedi farjan
November 10, 2016 at 12:49 pm
Dear justine i have a29inch crt philips tv the prob is when i power on it starts then it shut down after few secs when on led turns red then green plse could u help me
Jestine Yong
November 11, 2016 at 8:25 am
HI Zaheedi,
Have you checked if all the output voltages from the power supply good and stable?
Jestine
zaheedi farjan
November 10, 2016 at 12:53 pm
My philips tv model is sph600176a or29pt5005/69
zaheedi farjan
November 11, 2016 at 1:02 pm
Hi justine zaheedi here i checked
for the output voltage which is good i took out the line out put then load the collector with dummy load100n onwatts it turm on my load n do not shutdown until i press my switch off plse help
Jestine Yong
November 11, 2016 at 1:14 pm
HI Zaheedi,
After you have connected the 100 watt bulb and got back all the right voltages and did not shutdown this means it could be the something shorted in the high voltage side that had causes the power problem. It could be bad flyback, horizontal yoke, shorted diode and etc.
Jestine
zaheedi farjan
November 11, 2016 at 10:15 pm
Dear justine
Could it b the small ic tea 1507
Which is in the powersupply section
5pin ic
Jestine Yong
November 12, 2016 at 9:51 am
Hi Zaheedi,
If the output voltages from the power supply is good and tested good even with 100 watt bulb along the B+ line then probably not due to this IC.
Jestine
jose joy custodio
January 27, 2018 at 4:08 pm
good after noom. i have philips 29"crt flat.the probleme is.when i power on just secs it auto shut off.
the voltage is present.135v @ colector pin of hot,pin of 2ndary capasitor 160v 100 uf,ang b+ pin of fly back.all present(135v)
please can you help me to solve the probleme?thank you