REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Tuesday, 26 February 2019

VIZIO HDTV FAULTS AND REPAIR TIPS

VIZIO HDTV FAULTS AND REPAIR TIPS




VIZIO 42" LCD TV
Inverter boards, both Master and Slave blows occationally.  Within 10  of 12 days
The fault is due to its circuit design, and this fault occur to most models of Vizio TVs.  Start voltages and current will be high, and CCFL lamps changes internal parameters after 1 or 2 years of working period.  To lower the starting current is the only repair can be done, by inserting proper value of resistor, capacitor, and zener diode to lower the starting current.  This fault is not curable by customer, as it need through knowledge in electronics, and ability to follow the circuit and schematic diagram.
VIZIO - P42HDTV10A
No picture, no sound and screen do not comes ON.
Y_Sustain board fault.  There is a fuse [4A] at Y-Sustain on-board.  A suface mount type device.  Check whether it has burned out.  If it has opened, try replacing (YPPD-J018C).  In most cases this work will help you.  Anyway, it will be best to replace the Y-Sustain board as card basis.  Contact the nearest authorised service center for Vizio to buy this board.
VIZIO - GV42L HDTV LCD
No picture, No sound.
Main board should be checked, provided power supply remains OK.
In most cases the IC U-11 will get damaged.  Replace it will solve the problem.
VIZIO - P50HDTV10A
No picture, No sound.  Set powers ON.
The fault is with Y-Sustain board.  [YPPD-016] IC should be checked.  Replace this IC, or replace the bard as card basis.  Replacing it as card basis will be the best.
VIZIO - VP50HDTV20A
Turns ON, shuts down immediately. No picture.
Check the Top and Bottom buffer boards to these model sets.  Replace them at one time.  This is a common problem the this model.
VIZIO - VP422HDTV10A
Set works fine for 10 to 15 minutes, and picture and sound goes out.  No Menu on sereen.  Only flashing lines.  
Main board fault.
Replace the main board.  Buy it from authorised service center for Vizio.
VIZIO - GV471HDTV10A
The problem is intermittent.  Sometimes works properly.  Sometime no video or sound or both.
The [1.8V]  voltage regulator MPS1117 on the main board should be checked.  If this voltage drops too much, or not at all, this type of fault can occur.  Replace this regulator  first.  It is on the main board [U5].  If this do not help, replace the main board.
VIZIO VX371HDTV10A
The set tries to turn ON. No video, vertical lines, and no sound.  It shuts OFF after a short while.
Check the fuse at (+12) volt line on the main board. Replace the voltage regulator [FMPS1117] on the main board.  
VIZIO L32HDTV10A
No Power.
Power supply switching regulator board fault.  Check the fuse on the power supply board.  If found opened, check for any short circuted components, like capacitors connected in parellel to AC, Rectifier diodes [block].  If no fault found to these component/s, the main switching regulator is faulty.  It will be best to replace this board as card basis, rather than making 'surgery' to it.
The power supply bard number is [DPS-199AP].  If this board is not available, [FS-P201-3M01] can be substituted.
VIZIO - VX32LHDTV10A
All other functions, picture, sound are OK, but remote control function do not works.  
Check the remote control handset first for its infrared emission.  The procedure to check the remote control has been given in detail in this blog.  Pull up older posts.  If the remote control handset is found OK. Th remote control sensor inside the set should be checked. Check for any shorted SMD capacitor/s on the infrared sensor board.  In most cases one 1MKF capacitor to this board is found fault.  Remove it from circuit.  Even if there is no capacitor in this place, the remote control function will work properly.
VIZIO - VX42LHDV10A
No video, No sound.
Missing 24V and 12V from the power supply board.  Power supply regulator board fault.  Original power board to this model is [DPS-283AP].  This board can be substituted be [DPS-319AP].
VIZIO - VX37LHDTV10A
Switches ON, shows a blue screen for about 3 seconds and shuts down.
Concentrate on the condition of CCFL lamps in the panel.  If any one among them is burned, this type of fault can occur.
To know about which CCFL lamp has burned, connect the pin number (15) of IC 0Z9966SN, to ground by using a 10KOhms resistor.  By doing this, short circuit protection will be off.  After all repair, remove this resistor from circuit.  With this connection, all the back light CCFL lamps will light up, and the bad one which not lights up can be detected.
VIZIO - P42HDTV10A
Set turns ON.  Has flashing "dots' all over the screen with picture.
REPLACE THE LOGIC CONTROL BOARD [077B].
No other repair should be done
Posted By: FRANK at 02:16
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