Sony TV KV-25JXR20 reduced horizontal width problem

The owner of a Sony TV with model number KV-25JXR20 complained of the reduced horizontal width of the picture of his TV. He also observed "blinking" of the picture which must be his description of intermittent blanking of the picture.
During my initial observation of the problem I also noticed that the vertical size of the picture is in overscan - or stretched - resulting to vertical mislinearity and the presence of red, blue and green blanking lines at the top edge of the picture.
I suspected capacitors with changed values in the vertical deflection circuit and the horizontal deflection or pin correction circuits. Since the TV is already in the vicinity of being ten years of age, I also considered the possibility of dry solder joints.
Since there was no obvious bulging capacitors in my initial inspection of the main PCB I proceeded to resolder the deflection circuits and some parts of the chopper transformer, filter capacitors and rectifier diodes in the secondary circuit of the power supply.
After the soldering exercise, I powered-up the TV again to check if the problem was solved. I was not much surprised to see that the problem still persists since there was not really any obvious cracked or dried up solder joints on the TV's circuit board.
Doing another visual inspection on the component side of the PCB, I noticed the slight bulge on the top of a filter capacitor that was sitting beside the chopper transformer. I desoldered the capacitor and found out that it is a 100uF/160V electrolytic capacitor on PCB location number C609. A look under the capacitor revealed signs of electrolyte leakage. With the capacitor leads still hot from contact with the soldering iron I can still see the electrolyte boiling out of one of the capacitor leads.
By replacing this capacitor only, I was able to solved both the problem with reduced horizontal width and vertical mislinearity.

Kolin TV Service Mode

Chassis	Remote codes	To exit
I-Chassis	SLEEP-MUTE-DSP-MENU	DSP or SLEEP
K-Chassis	SLEEP-PIC-DSP-MENU. Press MENU to navigate pages.	SLEEP
M-Chassis	DSP-SLEEP-PIC. To select adjustment menu use CH+/CH- buttons. To enter the adjustment menus, use VOL+/VOL-	MENU

Before doing adjustments, list down the adjustment items and their corresponding data so you can return the data to previous settings in case the new settings result to more problems.

Refrigerator Care Tips for Users

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Refrigerator Care Tips for Users

• Defrost regularly or when thick frost accumulates in the freezer compartment. Frequent opening of freezer or cooling compartment doors can accelerate accumulation of frost. Thick frost can turn off thermostat and prevents running of compressor motor. This creates a situation of thick frost on freezer but cooling compartment is not cooling enough.
• Minimize frequent opening of refrigerator doors.Frequent opening of ref doors makes cold escape from compartments and lets in the hot air. This forces the motor compressor to work harder and increases power consumption. 
• Install the Refrigerator unit in a place with good air circulation and away from direct sunlight for better cooling efficiency. Ideally, the back of the Refrigerator should be at least 10 cm. away from the wall and its top must have a clearance of at least 30cm. from the ceiling.
• Clean Refrigerator regularly to minimize accumulation of odors.
• Use plastic ice scraper to remove stuck items or ice from freezer. Do not use knife or ice pick when removing items stuck in freezer as there is high risk of puncturing the tubing system of the refrigerator which causes leakage of refrigerant and results to a no cooling problem.
  
  
• Check that refrigerator door gasket is still pliant and magnetized allowing it to cling to the the cabinet sides to seal in the cold. Leaky gasket reults to cooling inefficiency which wastes electric power. 

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Refrigerators On-site Repair Home Service in Metro Manila

Hotline: 0905.898.7773 (text/call)

Washing Machine Care Tips for Users

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Washing Machine Care Tips for Users

• Do not overload washing machine. Put in the amount of laundry equal to or below the rated load capacity to prolong motor life and minimize stress on mechanical parts.
• Take care not to drench the timer switches with water as this can cause electric sparks. Electrical sparking can burn switch contacts, gears and springs.
• Make visual checks for water leaks. When the water level inside the laundry tub is decreasing even when the wash selector is not in drain position means that there is a leak in the tub or the drain plug. Leaks must be fixed to avoid waste of water.
• Remove all coins,  keys and other items from the pockets of pants and clothes before putting them in to the washing machine. Coins and other small objects tend to get lodged inside the drain tube of the machine and block the water exit to the drain hose.   
• If your washing machine is an automatic-type using a push-button electronic control panel, unplug the unit from the AC outlet every time there is a thunderstorm. Lightning strikes on electrical lines can cause power surges that can damage parts on the electronic panel.
• Install washing machine on level and stable ground so it won't "walk" when tub is spinning. 

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• The advantages of using front loader machines (slideshare.net)

JVC TV AV-J21MX: No power problem

This TV that came in for repair was found to have a Horizontal Output Transistor D1878 (on board location Q522) with a short between the collector to emitter. When the defective transistor was pulled out of circuit there was still a short measured from the B+ line to ground. The deflection yoke was unplugged from the TV's main board but still the short was present.


Tracing back towards the power supply it was found out that a shorted RU3A diode on board location D921 is shorting the B+ line to ground.

Replacing the transistor D1878 and diode RU3A restored power and normal operation to the set.

Philips Projection TV dark horizontal lines on picture

A Philips 43PP7445/69 Projection TV came in for repair with complaints of black horizontal lines on the picture. At first it seems that an interference in the video circuits is causing the problem. But when I entered the convergence alignment mode the problem showed itself as horizontal jittering which can be seen in the vertical lines of the convergence alignment cross.

By swapping boards the problem was isolated to the ACS Panel which controls the convergence alignments.

Philips FW-399V: Tape stops on rewind and fast forward

A Philips Mini-Component with 3-VCD Rotary Changer and tape deck has symptoms of tape automatically stopping within 3 seconds in the rewind and fast forward mode. Tape playback function, though, is normal.

I have replaced the rubber belts on both tape decks as part of the routine service procedures but tape deck still automatically stops and can't finish rewind or fast forward action.

I noticed the optical encoder discs located behind the tape deck to be dusty and tarnished so I cleaned it using cotton swab.



Cleaning the optical disc encoder finally solved the problem of tape stopping on rewind and fast forward mode.