Pioneer VSX-AX4AVi-S – Pioneer VSX-AX2AV-S – error code Error code MCACC LED flash

Fault at its Power amplifier circuit side.  Needs special attention to this code.  Do not attempt to repair it, if you are not experienced to do this job.  Reasons for this fault is given at the table below.

LG 32LA66 series LED LCD TV – Troubleshooting method - Screen defects - Line fault

Video error – No video/Normal audio
Check the white balance value.
Entry method
Press ADJ button on the remote controller for adjustment.
Enter into the white balance item [10]
After recording the R,G,B [Gain Cut] value of color Temp [Cool/Medium/warm], re-enter the value after replacing the Main Board.

Click on the pictures to zoom in

Video error – No video/audio

Check the DC 24V, 12V, 3.5V

Video error – video lag/stop

Check the Tuner input signal strength.

Menu > support > signal test > select channel.

When the signal is strong, use the attenuator [-10dB, -15dB, -20dB etc.]

Tuner checking part.

Check the signal strength or check whether the screen is normal when the external device is connected.

After measuring each voltage from the power supply, finally replace the main board.

LCD TV version checking method.  [Checking method for remote controller adjustment]

Press the In-Start with the remote controller for adjustment.

Video error – color error

Adjustment Test Pattern – ADJ key on the adjust remote controller

Can view 6 types of patterns using the ADJ key.

Checking item:

1 Defective pixel

2 Residual image.

3 Module error [add-bar, scan bar]

4 video error [classification of module or main B/D]

On-screen defects

No power troubleshooting:  For 10 models, there is no voltage out for standby purpose.  When standby, only 3.5V is normally ON.

Power error: Off when ON/ Off while viewing

Power off mode; checking method

Press the In-Start button of the remote controller for adjustment.

Check the entry into adjustment item – 3

Audio error: No audio-Normal video

Press the menu button on the remote controller.

Select “Sound” function of the Menu.

Change TV sound out to TV speaker.

Voltage and speaker checking method; when there is no audio.

Check the contact condition of the 24V connector of the Main board.

Measure the 24V input voltage supplied from Power Board.  If there is no input, remove and check the connector.

Connect the tester RX1 to the speaker terminal and if you hear a Chick Chick sound when you touch the GND and output terminal, the speaker is normal.  If not, it is damaged.

Remote control operation checking method.

Check the IR cable condition between IR and the Main board.

Check the standby 3.5V on the terminal 4.

When checking the pre-amp when the power On condition, it is normal when the Analog tester needle moves slowly, and defective when it does not move at all.

V-Com adjustment [Flicker]

Case-1

LCD module change.

T’Con board change.

Adjust sequence

Press the ADJ key.

Select V-Com.

As pushing the right or the left button on the remote controller, and find the V-Com value, which is no or minimized the Flicker. [if there is no flicker at default value, press the exit key and finish the V-Com adjustment]

Push the OK key to store the value.  Then the message “Saving OK” will pop out.

Press the exit key to finish the V-Com adjustment.

Scheuten Modules Solexus - Solar-panel Junction-Box repair

Repair of the Solexus junction-box of ScheutenSolar solar panels with the Scheuten Modules repair-kit of New Energy Systems Services. This repair is necessary because of the fire danger of the original junction-box. The repair may only be performed by professional solar installers, who strictly have to carry out this manual. Improper, incorrect or incomplete repair of the junction box can lead to dangerous situations. New Energy Systems Services cannot be held responsible for incorrect repair of junction-boxes. The repair can be performed in the field, whereby the local (safety) regulations (e.g. for working at heights) should be taken into account. The repair should be carried out during dry weather circumstances (no condensing) and the temperature should be above 5˚ Celsius. All activities at the junction-box itself should be carried out with clean hands.

ScheutenSolar used two kinds of PCB’s in the Solexus junction-box. This depends on the type of solar panel. Make sure you use the right repair-kit before you start with the repair; this is indicated on the packaging of the repair-kit. The 8-pole connector on the PCB also indicates for which type of solar panel the PCB is suitable.
1) Repair-kit for standard Multisol-modules (8-pole pin length 17,0 till 17,5mm).
2) Repair-kit for Vitro/Integra-modules (8-pole pin length 19,0 till 19,5mm)

Make sure the pin length of the 8-pole of the removed PCB is identical to the pin length of the 8- pole of the repair-kit. Replacing the old PCB by a PCB with a different pin length is not allowed.

1 PCB with red (+) and blue (-) connection wire.
2 (-) connector (chassis part), Multi-Contact order.nr. 32.0077P001 with adapter ring M12/M16.
3 Screw fit with PRELOK, type Scotchgrip 2353.
4 (+) connector (chassis part), Multi-Contact order.nr. 32.0076P001 with adapter ring M12/M16.

To carry-out the repair, you need (besides standard tools) the following special tools.

5 Torque (crosshead PH1) screwdriver, e.g. Facom A.300 MT (4-20 cNm).
6 Multi-Contact Wrench, Multi-Contact order number 32.6026.
7 Multi-Contact Test-plug, Multi-Contact order number 32.6028.
8 Special curved screwdriver (flat head) 4.0x100mm, angle 35˚ on 35mm from tip.

Shut-down the AC- and DC-voltage of your PV-system. Remove the solar panel from the sub structure.
The cover of the Solexus junction-box can be clicked off at the 4 corners with a flat head screwdriver.

After removing the cover, you can see the PCB from the solder side. The 2 U-shaped mechanical interlocks that lock the cable to the housing (photo 4), must be removed by clicking them out with a screwdriver.

Remove the screw that locks the circuit board.
Warning: do NOT re-use the screw.

Cut the cables behind the swivels (photo 6) and remove the swivels with a wrench.

Now the old PCB can be removed carefully by pressing the 4 latches on the outside of the junction box. What remains is an empty junction box with the 8-pole female connector visible in the back of the
module.

The dismantling of the old components is ready. Now, you can start installing the new components.

First, the 2 Multi-Contact MC4 chassis parts (2 and 4) of the repair-kit can be installed. Each chassis part is provided with a M12/M16 adapter ring. The (-) connector (2) should be installed on the left, the (+) connector (4) on the right. The chassis parts must be tightened with the Multi-Contact Wrench (6) and a socket wrench (15mm with torque-control) with a torque of 2,0 Nm.

Install the new, modified PCB (1) of the repair-kit. Make sure that the 4 interlocks on the outside click ‘over’ the PCB. Press the 8-pole connector firmly, to make sure that it makes contact with the female connector in the module with no spacing between.

Secure the PCB with the screw (3) of the repair-kit (photo 10). The srew is already provided with PRELOK (thread locker) to lock the connection (after tightening). The screw must be tightened with a suitable tool (5) with 0,15Nm.

The PCB is now mechanical locked and the chassis parts are in position. Next, the MC4-inserts must be clicked into the chassis parts. This is the most difficult action of the whole repair and should be done very precisely. Before the inserts are clicked into the chassis parts, the wires should be turned into a loop whereby the loop is pointing towards the outside of the junction-box. After that, press through the inserts.

Press through the inserts in the chassis parts using the curved (flat head) screwdriver (8), until it locks. This requires some practice where to pay attention that no parts get damaged (the insert itself, but also the wire, PCB, housing etc.)

Make sure the insert is locked well into the chassis part by carefully pulling the wire. Also check the position of the insert from the outside with the test plug (7), on the by Multi-Contact prescribed way. After a last visual check, the cover can be clicked on the junction-box again.

How to disassemble TCL LCD32B67 LCD TV Monitor

Lay the TV on a flat soft surface.
Push the clip for base as the arrowheads.
Remove the hinge cover as the arrowheads and the position by hand.

Remove the four screws to remove the stand.

Remove the 5 screws.

Remove the back cover as the arrowheads. [arrowheads is the position of the clips]

Remove the 13 screws.

Push the shield as the arrowhead direction.

Remove the 8 screws.

Remove the 7 screws.

Disconnect the connector.

Remove the 7 screws

Disconnect the connector.

Remove the 8 screws and the two connectors to remove speakers.

Remove the three screws to remove the keyboard.

Remove the 23 screws to remove the iron piece and AC switch.

Remove the 8 screws.

Digital Tuning fault troubleshooting - Sony KLV32R3 – Sony KLV40R3 – LCD TV

Troubleshooting for digital tuning fault is somewhat critical and skilled work.  You should spend your own time to locate the faulty components.  In case you feel some difficulty, contact any experienced service technician or the authorized service center for Sony.
Tuning fault [both analogue and digital] is the common fault occurs to these model TVs.  From the error codes displayed by the set [LED blinking codes]; we can get an idea only, about which board is defective.  Instead of replacing the board itself for this fault, we can check and locate the exact faulty components, and the board can be repaired.  The fault is related to component/s at the ‘B’ board.
Digital tuning fault troubleshooting table 

Check points on board

See how to update the firmware, Service Mode >>>>>