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La40a450c1dxxy service manual

I need a service manual or main PCB Circuit as I am a retired TV & Video Tech trying to fix my sons TV I have been told that the main board (part BN94-02127B)is no longer available in Australia and is not supported by the USA for parts or ic's etc the problem is a vertical red Chroma bar aprox thirty centre metres from the left however the tv will work with extra heat sinks and a fan on the main board I have already changed all caps in the PSU inverter etc and am trying to either replace the main PCB or isolate the shorted SMT and replace it can you help?

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  • 4 Answers

I have been told that my power suppy board has gone out and i need to know how to fix it and where it is

Posted on Jul 10, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: OLEVIA 540-B11 42" LCD-Inverter supposedly shot craps

Hi , I had the same problem but a got the power inverter from somebody, here in denver for $260 brand new , if somebody needs this part, contact me and I will send the information , also please write the part number
Sergio

Posted on May 29, 2008

jerryg50
  • 1667 Answers

SOURCE: Plasma TV

Your set is servicable with proper troubleshooting. Normaly, the defective boards are swapped out to service these sets. This fault can be in the address decoder, or the display drive boards. It is also possible that the failure is in the display assembly itself.

My preference would be to give the set to the authorised service rep to have an estimate to deterine if the set is worth to service.

Jerry G.

Posted on Jul 16, 2008

SOURCE: Need Diode part numbers for Philips Y-Main board

Not serviceable at component level, yeah right! They wish it isn't - it's a well known fact that electronics manufacturer's spare parts divisions generate more profit (with less revenue) than the retail units.

Long story short, we've serviced tens if not hundreds of those boards and we certainly aren't one of the biggest "unauthorized" service centers around.

I.e. we do not have a Samsung license and frankly, we don't need one.

LJ41-02759A is anything, but a black box and its weaknesses are well known within the service tech's community.

For D5001 you can use any 1A fast or ultra-fast rectifier diode with at least 200V reverse voltage. We use this:
http://www.fairchildsemi.com/ds/ES%2FES1F.pdf

If you need help, check out blog or contact us for service information.

www.coppelltvrepair.com

Posted on Apr 30, 2010

  • 21 Answers

SOURCE: NM2168(020731) 14" TV. Vertical circuit

The spark that you saw was probably caused by a cold solder ..remove the old solder,clean the pcb make sure that the track is still ok..if there is a break its ok to jump it with no.22 AWG solid copper wire.Some tv version gets the 24vdc supply for the vertical circuit from the flyback transformer.Also check the vertical IC for cold solders ..hope your problem is confined to cold solders only..good luck

Posted on Dec 30, 2010

eagle338
  • 4889 Answers

SOURCE: right side of samsung ln52a580p

This is not an issue with the main board . Its a clear case of faulty LCD controller board or the LCD panel itself is faulty(most likely). I suppose the sound is not affected?

Posted on Feb 15, 2011

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I have an LG SS4500 PLASMA TV. On the left side of the television it's 2 white lines about 4-5 inches a piece and apart!Do you know which part I could order to fix it without having to replace thetv?


This is probably a bad op amp on the main pcb/display driver circuit, or a defect in the display. This is a warranty issue if still within warranty or if you bought extended coverage. It is not a user repairable problem. Unless you are a qualified professional service tech, you'd be better off letting them troubleshoot it at a shop, or buy a new tv.

Apr 06, 2017 | LG Televison & Video

1 Answer

Streaks in the centre of tv right through gh


Hi Beluda

Modern Digital TV's are really just Digital Computers with a CPU & Memory & a Flat Screen digital monitor, which uses the internal computers video memory to display content.
Streaks therefor would indicate a bad ribbon cable from main pcb to flat screen video screen or a video memory problem.

Today's HD TV's are NOT like the TV's of the past (Analog) that could easily be tweaked & fiddled with to get better picture results. It is made with Solid State Digital computer components.
So.... with that in mind.
Do you have the technical ability to fix a computer's internal cpu board?

If so, Open it up and put on your anti static strap & lets go.

Disconnect The Power.
Switch off at the wall to retain an antistatic ground point.
If you have a 3 pin power outlet (ground pin)

Check internally for poor connections (cold solder) or loose ribbon cables & connectors?
Look for cockroach & insect bodies & droppings on the circuit boards. (Shorts)
Look for overheated or damaged components.

But.... the biggest & most likely problem is that the DC voltages are not stable. (Poor Filtering)
This is caused by Leaky or Bulging Electrolytic Capacitors.
They have internal chemicals that deteriorate over time. Especially by being too close to their max voltage rating (printed on side)

There are No Internal 25KV voltages to worry about on Digital Flatscreen's.
There is a shock hazard on AC side of Switchmode Board.
Electro Caps on AC Input side can hold 110 / 240v
Check the Switchmode internal power supply on DC Side for bad Electrolytic Type Capacitors.
The insulated Tin Cans on the PCB with a Negative stripe down one side
Bulging or leaky Electrolytic Caps cause many failures in modern digital TV's

If you are not a Tech Type....
Take it to a service tech & ask to check Electrolytic Caps.
Most Tech's these days will Just Do A Board Swap. Costing $$$
If you are a tech type and feel like exploring & possibly fixing the problem.

Good Luck
Switched mode power supply
https://en.wikipedia.org/wiki/Switched-mode_power_supply

How to Replace an Electrolytic Capacitor Switched mode power supply

Feb 13, 2016 | Televison & Video

1 Answer

I am seeking a circuit or service manual for a LA40A450C1DXXY


We tried to turn on tv and it will not show a picture or sound can you tell me what is wrong with it

Jul 10, 2013 | Televison & Video

2 Answers

I HAVE A CANON IR 3300 MACHINE I HAVE ERROR E00000-000


WHAT: Either the main thermistor doesn't attain 30?C 1 second after the power switch is activated or it doesn't attain 70?C 2 seconds thereafter.

WHY: It has a faulty fixing film unit, lack of connectivity with the main thermistor, lack of connectivity with the fixing heater, a faulty main power supply PCB, or the DC controller PCB is faulty.

NOTE: You can reset the error by performing the following in service mode: COPIER>FUNCTION>CLEAR>ERR.

CONNECTOR FIX: Make sure that the connector of the fixing assembly is seated.
A. main power supply PCB (J8) relay connector heater
B. DC controller PCB (J320) relay connector thermistor

FIXING FILM UNIT (THERMISTOR) FIX: With a multimeter, check the interval between pin 1 & pin 2 & between pin 3 & pin 4 of the connector (4-pin) of the thermistor for electrical continuity. A result of ?? means that the circuit is open (lack of connectivity). Resolve this by replacing the fixing film unit.

MAIN POWER SUPPLY PCB, DC CONTROLLER PCB FIX: Press the Start key. If the drive voltage of the heater is supplied by the connector J8 of the main power supply PCB, then the main power supply PCB should be replaced. If not, then the thermistor control mechanism is faulty & the DC controller PCB should be replaced. Use the following to ascertain this:
Main heater: between J8-1 (FSR1) & J8-5 (FSR COM)
Sub heater: between J8-3 (FSR2) & J8-5 (FSR COM)

Sep 25, 2010 | Office Equipment & Supplies

1 Answer

Hi - We have an error code on a Canon Model 2800 : E000001-0002 Any ideas on how to fix the problem? Thanks! Paul


E001
0000 The main thermistor detects 250°C or higher.
0001 The main thermistor or the sub thermistor detects overheating (hardware
circuit detection).
0002 The sub thermistor detects about 295°C or higher.
Main cause The fixing film unit is faulty (i.e., the thermistor has a short circuit). The
main power supply PCB is faulty. The DC controller PCB is faulty.
Caution To clear the error, execute the following in service move:
COPIER>FUNCTION>CLEAR>ERR.
Action
1. Fixing film unit
Check the interval between pin 1 and pin 2 and between pin 3 and pin 4 of
the connectors (4-pin) of the thermistor for electrical continuity. Is it 0 ?
(short circuit)?
YES: The thermistor has a short circuit. Replace the fixing film unit.
REF.
If the thermistor has a short circuit, the indication in service mode
(COPIER>DISPLAY>ANALOG) will be as follows from the start: FIXC=250°C
for the main thermistor; FIX-E=310°C for the sub thermistor.
2. Main power supply PCB, DC controller PCB
Try replacing the main power supply PCB. Is the problem corrected?
YES: End.
NO: Replace the DC controller PCB.


BUT FIRST: under service mode *28* copier, function, clear , err turn off and on maybe it will work.If it works check that you have good air flow around the copier.

Apr 19, 2010 | Canon (6981A002AA) for imagerunner 2200,...

1 Answer

Need a services manual with codes and fixes


E000 : The main thernistor is opened.
E001 : Thermistor in short circuit.
E002 : SSR faulty
E003 :SSR and PCB faulty
E004: SSR in short circuit.
E005: Fixing web taken up.
E010: The main motor defected.
E012:Drum motor blocated.
E013:Wastw toner feedscrew faulty.
E014:Fixing motor defect.
E020:Hooper motor failure.
E032:PCB defect.
E061:Laser unit faulty.
E100 :The DC controller PCB malfunction.
E110:Laser scanner motor defect.
E121:M4 cooling fan defect.
E196: EEPROM faulty.
E202:Scanner home positin faulty.
E204:ADF controller faulty.
E220:Lamp inverter faulty.
E225:Xenon tube malfunction.
To reset in service mode press COPIER-FUNCTION-CLEAR-ERR.

Aug 11, 2009 | Canon imageRUNNER C6800 Copier

2 Answers

System Error E000 and E003


E002 Error code details Heater temperature error (fails to reachspecific level; inadequate increase)


0000 The temperature of the fixing film is as follows:
1. has exceeded 100°C, but does not reach 115°C within 1 sec thereafter.
2. has exceeded 140°C, but does not reach 150°C within 1 sec thereafter.
3. has exceeded 160°C, but does not reach 165°C within 1 sec thereafter.

Main cause
 The fixing film unit is faulty (i.e., the main thermistor TH1 has poor contact, or the fixing heater is faulty). The main power supply PCB is faulty. The DC controller PCB is faulty.

Caution
 To clear the error, execute the following in service mode: COPIER>FUNCTION>FCLEAR>ERR.

Action
 See the description for E003. E003 Error code details Heater temperature error (abnormal drop; low-temperature detection)


0000 The main thermistor reading is lower than 140°C when paper is moved.

Main cause
 The fixing film unit is faulty (i.e., the main thermistor (TH1) has poor contact or has an open circuit; or, the fixing heater is faulty). The main power supply PCB is faulty. The DC controller PCB is faulty.

Caution
 To clear the error, execute the following in service mode: COPIER>FUNCTION>CLEAR>ERR.

Action
1. State
 Turn on the power switch, and clear E002/E003. Thereafter, turn off and then on the power switch. Does the fixing heater operate?
 NO: See "The fixing heater fails to operate."
2. Wiring
 Is the wiring from the DC controller PCB to the fixing film unit normal?
 NO: Correct the wiring.
3. Fixing film unit, DC controller PCB
 Try replacing the fixing film unit. Is the problem corrected?
 YES: End.
 NO: Replace the DC controller PCB.

Jul 28, 2009 | Canon imageRUNNER 2000 Copier

1 Answer

VS-5061 -- BLACK SCREEN


Good Day, petterk;
Try resetting TV by unplugging from the A/C outlet for3 to5 minutes. This a 1994 Model, you can't new boards from Mit's. Try this:
1). CHECK FOR 1200 VDC AT PIN 1 OF CONNECTOR "DK". IF LOW OR MISSING CHECK R5D9 100 OHM 1/2 OFF PIN 1 OF THE FLYBACK ON THE MAIN PCB. 2). CHECK IC401 PIN 8 FOR 28 VDC IF MISSING CHECK R510 1.2 OHM 1/2 W OFF PIN 5 OF THE FLYBACK. IF OPEN IC401 PART # 272P239050 MAY BE SHORTED. BOTH ARE ON THE MAIN PCB. 3). CHECK FOR SHORTED OR LEAKY Q2H0, IF BAD APPLY FOLLOWING CIRCUIT CHANGE TO CORRECT. ON FOIL SIDE OF PCB-SIGNAL, SOLDER A 1S2471 DIODE CATHODE TO BASE OF Q2H0 AND ANODE TO EMITTER. LOCATED ON PCB-SIGNAL AT IC201 PIN 2. PT # 264P045040 AND REPLACE Q2H0 PART # 260P559030. 4). CHECK C2H1 100 UFD 35 V C2H2 1 UFD 50 V AND C2H3 47 UFD 35 V OFF OF Q2H1 IN THE SPOT KILLER CIRCUIT ON THE SIGNAL PCB. Good Luck, big IRISH. PS: or call for service, Cost average repair about $500.00, you do the math maybe it's time for a new TV. G.L.

Aug 16, 2008 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

IR 2000


Fuser error probally needs fuser replaced and the reset as below

try this

1. Hit Additional Functions Key
2. Hit # key
3. Arrow to number 7, Printer and hit Set
4. Arrow to number 4, Printer Re-Set and hit Set.
5. Yes, re-set printer (hit minus key - back arrow).
6. Unplug the machine and plug it back in.

or this is explaination of the error and required fix from service manual.


E0000000
The reading of the main thermistor does not reach 30°C 1 sec after the main
power switch is turned on. Or, it does not reach 70°C 2 sec thereafter.
Main cause The fixing film unit is faulty. The main thermistor has an open circuit. The
fixing heater has an open circuit. The main power supply PCB is faulty. The
DC controller PCB is faulty.
Caution To reset the error, execute the following in service mode:
COPIER>FUNCTION>CLEAR>ERR.
Action
1. Connector
Is the connector of the fixing assembly connected?
a. main power supply PCB (J8) <-> relay connector <-> heater
b. DC controller PCB (J320) <-> relay connector <-> thermistor
NO: Connect the connector.
2. Fixing film unit (thermistor)
Check the interval between pin 1 and pin 2 and between pin 3 and pin 4 of
the connectosr (4-pin) of the thermistor for electrical continuity. Is it ¥W
(open)?
YES: The heater has an open circuit, or the thermal switch is open. Replace the fixing film unit.
4. Main power supply PCB, DC controller PCB
Press the Start key. Is the drive voltage of the heater supplied by the connector J8 of the main power supply PCB?
Main heater: between J8-1 (FSR1) and J8-5 (FSR COM)
Sub heater: between J8-3 (FSR2) and J8-5 (FSR COM)
YES: The heater drive power supply is faulty. Replace the main power
supply PCB.
NO: The thermistor control mechanism is faulty. Replace the DC controller
PCB.

Nov 18, 2007 | Office Equipment & Supplies

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