Having problems with your Projection Televisions ?

Please help me, i'm repairing 14" old model television.. it don't have brand name but it is using 47C434N-R201 system, TA8680N video chroma IC, 30115 regulator, my problem is it don't have oscillation, B+ ranging at 130 volts going to the collector of the horizontal, horizontal ok, regulator ok, i replaced TA8680N but nothings happen...



Answers :

Good day!

Try to check the base of the horizontal output if have a signal from the chroma or jungle i.c it should have 5-7vac to trigger the high voltage.If no voltage try to hang it and check again if the voltage appear while you hang it,your ply-back got partially defects replace it with the same type and ratings.
Next,if you already hang the base of h-out and still no voltage on it and the chroma i.c is new.Trace the line from the base of h-out to the chroma/jungle i.c.Test the parts that pass through that line such as open/change value resistors.

I hope this solution will be helpful.Thank you I'm very glad to share my idea.Good luck.

Repair Help & Product Troubleshooting for Projection Televisions
You need a second opinion or clarification ? ask it in the comment box OR you can Ask Your Own Question

Tips for a great answer:

  • Please provide as much detail as possible as this will allow our members to better understand and respond to your Comment
  • If you need clarification, ask it in the comment box
  • It's 100% free, no registration required

Suggested Questions/Answers :

It is recommended you read all this kind of situations

Please help me, i'm repairing 14" old model television.. it don't have brand name but it is using 47C434N-R201 system, TA8680N video chroma IC, 30115 regulator, my problem is it don't have oscillation, B+ ranging at 130 volts going to the collector of the horizontal, horizontal ok, regulator ok, i replaced TA8680N but nothings happen...


Good day!Try to check the base of the horizontal output if have a signal from the chroma or jungle i.c it should have 5-7vac to trigger the high voltage.If no voltage try to hang it and check again if the voltage appear while you hang it, ... Mitsubishi Projection Televisions

RCA TV 32V434T. F 800 was blown. IC 801 pin 1 and 3 was short. I changed IC 801. Then the red lamp in front blinks about 28 sec. Then a click and TV turns off. Have to unplug the TV to start again. IC 860: pin 2 to 8 = 169.3 volts, pin1 to 2 = 8.7 volts (this voltages even after the TV turned off) pin2 to 4 = 2.69 volts (after TV turned off 0 volt). IC 801: pin 4 to minus C 806 = 16 v; after click goes to 4,1 v.Pin 1 to minus C 806 = 160 v; after click goes to 4,8 v. D 869 c = 2,39 v. D 868 c =


... RCA 32V420T 32" TV

Veon 240 12 volt tv .I wish to use this in a motor home.Should I use a regulator or 12 volt dc ?


... Flat Panel Televisions

My Soniq PT42SH does not turn on .There's only orange indicator on. I have seen people say it is the 1.8 volt regulator on image pcb, where is this pcb in the TV? Where can I get a service manual for this TV? and which one is 1.8v regulator ? what's its code name ?


... Flat Panel Televisions

Horizontal lines My tv have horizontal lines from 3/4 down to the bottom and once its on the tv clears up and then plays good as long as its on once turn off it goes back fuzzy and snowy like i change main and t con board i really dont see anything wrong with the power supply but then again i also read that it could be the lcd panel thats bad


It sounds that the main power supply regulator board has the fault. Replace all the large electrolytic capacitors on that circuit board, or replace it with a new board as card basis. ... RCA L32HD41 LCD TV

My tv is JVC model # is AV-21MT35 the new technician needs the schematic diagram. my old technician lost the parts to be replaced one is for the horizontal out and the other one regulator...


You can use [BU508AF or C3886A OR D5702] as horizontal output. All of these transistors are equivalent to each other, and is commonly used with RCA TVs. But, if there is a fault with its Horizontal output Transformer, {LOT}, none of these transisto ... RCA TruFlat 27F520T 27" TV

My pc input says out of range and I dont understand why


... Sony Bravia KDL-32V4000 32 in. LCD TV

Iam having problem with a konka tv model kp2905qyt. there is no EHT but 130 volt is present on collector of horizontal output transistor, pleasse help


This problem has been answered a few while ago. Check the horizotal oscillator frequency. ... Konka Standard (CRT) Televisions

Onida colour television model co29ox5350bl the b+ voltage should be 135 volts when i switch on the voltage 135 is for a few seconds and the voltage is droped to 95 volts can any body may help me


... Standard (CRT) Televisions

Sanyo st-21ms22,what defective of the tv when the vertical supply up to 35 volts,overheat the horizontal,


... Standard (CRT) Televisions

Sylvania ld320ss8a power up problem.It goes on stand by after 6 or 7 blinks of the green power on light and back to red 5-6 seconds There is no sign of bad capacitors on the inverter CBA.after unplugging power from inverter CBA to the power supply CBA what should the power read under normal conditions coming out of the inverter? I am getting a pulsating reading of 0-117 volts about every 2 seconds.Any advice as to the problem??


... Sylvania LC370SL8 37 in. LCD Television

I have a symphonic 27 inch tv im working on and i dont know the volts and watts of zd 655 can someone help me out plzzzzz


... Haier Standard (CRT) Televisions

Insignia 3.3 volt regulator - Insignia Flat Panel Televisions


It can be purchased from most of the electronic spare part selling shops. ... Insignia Flat Panel Televisions

Ihave sharp tv pcb using chroma ic m61266 , it is in stand by . no horizontal oscillation what is the problem


... Standard (CRT) Televisions

No oscillation on horizontal section of polytron television model 29F2003


Check and replace the horizontal oscillator IC. ... Standard (CRT) Televisions

Do not start, no 135v i have change regulator, horizontal transistor is ok


Sorry Bud, I need a model number before we can go ahead.\015\012Is the SMPS running? what voltages do you have? ... Flat Panel Televisions

We took the board out and changed the convergence ic's when we put it back in and turned it on it goes from 110 volts to 0 every time you turn it on .what have we done wrong


Sounds like you have a short in your soldering. If you need tips on how to do this model or soldering goto www.TvRepairKits.com - look on their tips page ... Hitachi 43FDX01B TV

Distorted picture and sound in Samsung UN46D8000 Led tv. Sound is like whistle even when volume is set to 0 level. Picture on screen is having a horizontal flickering lines.


... Projection Televisions

Hi....i have a horizontal faded green line at the bottom of a 42 inch full hd philips lcd ....the line started showing through hdmi cable(tried to replace the cable but in vain)...now the green line is showing even when i use dvd player and all the other scarts...can someone guide me as i really dont have any idea ....tks


Hi, Lines across TV are caused by leaky condensers. Horizontal lines mean the faulty condenser causing the lines is located in the vertical section of the TV's PCB. You will most likely have to get a technician to repair it unless you ar ... Philips Standard (CRT) Televisions

Hello, I have an Orion STV2763a with a solid line of white across the screen with about 2" of static below it. Found the LA78041 Vertical deflection IC to be bad, replaced it and d418 and d419, two 33 volt zener diodes and C414 [email protected] capacitor. still same issue, checked my voltages into the IC and are as follows. Pin 1 should be 3.9 v, varies from 2.4 to 4.6. Pin 2 should be 26v, is 29 to 31v. pin 3 should be 2.2v, is 2v to 3.2 v, pin 4 is ground, and has 0 v. pin 5 is vertical output, should


... Orion STV2763 27" TV

I get horizontal lines in my panasonic pt-47wx49e and dont kmow hoe to get rid of them


... Panasonic PT-47WX49 47" Rear Projection Television

I have a tv sharp lc 32sb24u dont turn on the green led is blinking i have voltage in both sides of the power switch 3.2 volts


Hello,power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these ... Sharp AQUOS LC-32D44U 32 in. LCD TV

How easy is it to place 100uf/16v and the 9 volt regulator?


No way around it, parts have to be un-soldered and then installed correctly and soldered in place. ... Projection Televisions

Sony kp-46v15 convergence problem dont know were to start on adjusting main convergence board in front were do i start there is 15 or so red green blue ajustments for horizontal and the same for vertical need help in understanding were to start


Do not mess with those, they don't just go out. they are also for skew linearity, heighth, width for vertical and horizontal adjustments. If your convergence went out need to find convergence circuit and look on the plugs for your vcc voltages goin ... Sony KP-46V35 TV

Dead set ; fuse , ic regulator , horizontal output transistor , r2m diode replaced already. Still dead set.


Hi,\012\012You need to confirm where is the trouble before replacing any parts.\012\012Test the B+ on the H-out transistor.\012\012No-check the B+ on 160v electrolytic cap.\012\012If No B+ here then the trouble is in the regul ... Flat Panel Televisions

A detailed question is important to get you a relevant answers

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
all rights reserved to the respective owners || fullblownbass.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0436 seconds