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Hi am trying to repair a xoro model : HTL4732B which goes in standby mode. All the voltages are present but as stated it still goes in standby mode. Can any one help? Bryan

Is it normal to measure 5V in the 5VSB pin on the power supply? Power on is at 3.7V. The rest of the voltages are present namely ; 24V, 12V,5V. -could there be a problem with the control board. If yes how can i confirm. Many thanks Bryan G

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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a 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017

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SOURCE: Dell 1800FP Dark, No Power but power supply seems fine. Help!

I just repaired 3 1800FP's - all dead, no lights.
Firstly a dead 2AS01 is 95% of the problem, because some fool designer left out the protective zener diode - cheapness.
Mouser Electronics does not have this part, but lists it at 37 cents in lots of 2500, and gettable at $2.66 somewhere else.
You must also replace the two small value electrolytics near this IC, as some had an ESR of 40 where <0.5 is where it should be.
I suppose as the electro's dry out, the spikes can zap the IC. The quacks on ebay flogging 2sa01's alone, probably hope to sell you another one down the track (at a fat markup).

There are 2 'Sam Young 2200uf' electros that really should be replaced, with ESR or 2-30 ! Ideally replace ALL electros, as the others will be off - but those 4 as a minimum and using a jewelers loupe, resolder other joints on the transformer and anything that looks more dull silverish, than the rest. A 1 inch used and worn paint scraper will get the case open easy.

DANGER, CAUTION : Finally when refitting the inverter board, ensure the steel tab is over the TOP middle of the board facing away from the power socket (SO YOU CAN SEE IT) . The board sides in flat. It is possible to scew the board down with a slight bend, with the tab pressing over the pcb tracks - very , very bad!

Now all I need is for some kind soul to improve the fix by stating what the value of the missing zener should be.

PS. Just because the caps are not bulging does not mean they should be OK. Most wrecked 10 year old power supplies have better ESR's, so the electronics must be hot under the cover.
I have seen bulging caps with a GOOD ESR, and non bulging ones with an ESR of 47.

Canberra

Posted on Aug 28, 2008

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bob_computer
  • 3153 Answers

SOURCE: Pin Name Color Description

Yes this is a good list of the voltages to be expected from a newer power supply on just the main header

Posted on Aug 11, 2009

  • 18 Answers

SOURCE: http://pinouts.ru/Power/atx_v2_pinout.shtml

um what you want lol:?

Posted on Sep 07, 2009

Ecollier2012
  • 3459 Answers

SOURCE: 5v present on stb voltage

Plasma and LCD TV sets are prone to having capacitors in the power supply section fail. This is the most likely cause for the probem you describe. When capacitors fail your will commonly see one or more of the following symptoms.

  • No video, Power light is on or blinking.
  • TV is making a clicking noise.
  • TV takes a while to come on
  • Screen is very dim or flickers.

Again, You can get a power supply repair kit with the parts, detailed instructions, and support from sites such as www.TvRepairKits.com . Or just click here to see more details on their kit.

Here are pictures of capacitors...Notice that the ones below look bloated. They have failed and will need to be repalced.


ecollier2012.jpg
Capacitor being replaced! Fairly easy DIY fix.

ecollier2012_0.jpg
Again, You can get a power supply repair kit with the parts, detailed instructions, and support from sites such as www.TvRepairKits.com . Or just click here to see more details on their kit

Posted on Jun 10, 2011

caroldon
  • 17130 Answers

SOURCE: My Sansui 32" Model LCD32hbw got stuck with the

Sure the power supply si working and the processor seems struck up to trigger the power but is not responding to the remote. So it is important that the main processor is checked to fulfill the working. Check for the +5 rail voltage, check for the input /output data, check the remote feed of data and the crystal oscillator.
It is possible that there is a failure around the processor or the memory.

Posted on Sep 03, 2011

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1 Answer

Tv will not turn on green light flashes for 10 seconds then goes to red


Tv's are designed to check themselves for problems when 1st turned on. If something is shorted and a voltage goes to high they will not turn on fully. It sounds like your set is trying to turn on yet sees a problem then goes back into standby mode. This can be cause by many different circuit problems. Generally repairs can range from $75 to over $200 depending on problem and brand. I only recommend repairs if half the cost or less to fix. Since your ? only stated it's a CRT. I would recommend your purchase a new LED LCD TV. CRT (cathode ray tube) Tv's are now old technology. You could probally find a new set for the price to fix the old.

Jan 20, 2014 | Televison & Video

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No power on (LCD27TV006HD)


Hi,

Does the standby light continue to blink? IF so, count the number of blinks and go to:


Continuous Blink Once A Second, No Pausing As Discussed Above---
No reply from the jungle IC301 (data bus is busy, shorted to ground or held high), IK video path is defective.

ONE Blink--- not used for the self-diagnosis

TWO Blinks---B+ over current protection (OCP) , unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.

THREE Blinks---B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.

FOUR Blinks---No Vert. Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

FIVE Blinks---AKB circuit (AKB), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. Also unit be in IK blanking, try turning up screen slightly.

SIX Blinks---No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.

SEVEN Blinks---High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

EIGHT Blinks---Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401 and 402.


That may help you decide what is going on.

In the long run you will probably need to have a tech take a look at it. The problem you describe is usually a serious matter that needs repair by a trained technician..

Goodluck,
Don't forget to rate me as fixya...

Feb 03, 2008 | Televison & Video

1 Answer

My lcd tv wont come on but the stadby light is on ?


Hi.

The TV starts in forced standby. The state is also called "Protect Mode". Protect mode kicks in whenever an internal fault is detected. The error is detected by controller circuit and the PSU is forced in standby mode, shutting down all voltage lines apart 5VDC to keep standby on.

First try disconnecting the power cord for ten minutes, reconnect after ten minutes and restart the TV with no device connected.

If that does not help it means that there is an internal fault and that the TV must be tested and repaired replacing the defective part.

The defective part is usually the PSU. Among components that fail quite commonly there are the capacitors on the power board. If the capacitors look swollen or if there is trace of damage on PSU board, then the affected parts must be de-soldered and replaced. If there is no evidence of damage at a glance the parts must be tested using a multimeter and following schematics from service manual.

If you need to call a technician use the phone number listed on the owners manual or on the manufacturer support web page.

Regards.

Ginko

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1 Answer

Tv dead red light wont stop flashing


Hi.

The TV starts in forced standby. The state is also called "Protect Mode", and kicks in whenever an internal fault is detected. The error is detected by controller circuit and the PSU is forced in standby mode, shutting down all voltage lines apart 5VDC to keep standby on.

First try disconnecting the power cord for ten minutes and restart the TV with no device connected.

If that does not help it means that there is an internal fault and that the TV must be tested and repaired replacing the defective part.

The defective part is usually the PSU. Components that fail quite often are the capacitors on the power board. If the capacitors look swollen or if there is trace of damage on PSU board, then the affected parts must be de-soldered and replaced. If there is no evidence of damage at a glance the parts must be tested using a multimeter and following schematics from service manual.

Regards.

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Jul 17, 2011 | Televison & Video

2 Answers

Define "standby" mode.


Hello,

The standby mode is a power saving feature. In this mode, a it does not shut down completely, just goes to low power state and so it consumes less power. When it resumes from the standby mode, full power is restored.. During the standby mode, if the power supply is disconnected or interrupted, data might be lost.

Hope this helps,

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2 Answers

No power standby light


If it is the main fuse that is being smoked, there are a number of possibilities:

1) Since this is a CRT based set, the most common failure os of the horizontal output transistor. This goes shorted which causes too much current draw on the power supply and it pops hte fuse.

2) The switch mode power supply transistor has shorted.

3) Failure of the primary side capacitor.

Without seeing the set and taking some internal measurements, I can not state for sure the exact problem with your set. Since there are potentially dangerous high voltages present inside even when unplugged, I would suggest that you get a detailed repair estimate from a local service shop and post the results here. We may be able to walk you through the actual repair.

Dan

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3 Answers

Flashing stand by light and tv does not respond to any swithc or remote


Hi.

If after the fault the TV went in standby and does not wake up, staying there with led flashing, then the TV has on protect mode after detecting a fault.
When this happens higher voltages are shut down to prevent further damage. Only the +5V line will stay on to keep the TV in standby.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Nov 02, 2009 | Sony Televison & Video

1 Answer

Tv has got stuck on standby mode


If the TV goes off completely, then is usually a faulty power board.

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

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On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

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turn the power on. to get rid of the red light you need to press the timer/rec button on the remote until it turns off. the red light means it is programed to record.

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