DOWNLOAD Sony XBR-52LX905 / XBR-60LX905 (serv.man3) Service Manual ↓ Size: 2.16 MB | Pages: 37 in PDF or view online for FREE

XBR-52LX905/60LX905  

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Use the following precautionary guidelines when replacing the Glass Assembly to avoid material degradation or screen coating degradation, 

and ensure that dust, dirt, or fi ngerprints are not left between the glass and the LCD panel.



  Replace the Glass Assembly in a brightly lit and clean room.  



  Place the replacement Glass Assembly on a dark cloth to make it easier to see dust and dirt particles. 



  Wear anti static gloves to avoid leaving fi nger prints on the glass.



  Use a dry, soft MicroFiber cloth, such as a lint free polishing cloth, to gently wipe the glass to remove any dust or dirt particles. 



  If the glass needs additional cleaning, slightly moisten the cloth with a diluted mild soap or mild detergent solution, or use a compressed 

air duster (spray can type). 



  After replacing the Glass Assembly, verify there are no dark spots or fi nger prints visible on the screen.



 

Do Not

 use paper towels, any type of abrasive pad, rags, rubber or vinyl materials to clean the screen. Using these materials could easily 

scratch the screen which may result in permanent damage.



 

Do Not

 use any cleaning product containing alkaline/acid cleaner, scouring powder, or volatile solvent, such as alcohol, ammonia, 

benzene, thinner or insecticide. Using any of these harsh cleaners may result in permanent damage to the screen.



 

Do Not 

spray water or detergent directly onto the TV screen . If liquid drips into the bottom of the screen it may cause a failure.

XBR-52LX905/60LX905  

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1)  Do not press on the panel or frame edge to avoid the risk of electric shock.
2)  Do not scratch or press on the panel with any sharp objects.
3)  Do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
4)  Do not expose the LCD panel to direct sunlight.
5)  Avoid contact with water. It may cause a short circuit within the module.
6)  Disconnect the AC power when replacing the backlight or inverter circuit. 
 

(High voltage occurs at the inverter circuit at 650Vrms.)

7)  Always clean the LCD panel with a soft cloth material.
8)  Use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
9)  Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10)  During the repair, DO NOT leave the Power On for more than 1 hour while the TV is face down on a cloth.

XBR-52LX905/60LX905  

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After correcting the original service problem, perform the following safety checks before releasing the set to the customer:

1.  Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and 

bridges.

2.  Check the interboard wiring to ensure that no wires are “pinched” or touching 

high-wattage resistors.

3.  Check that all control knobs, shields, covers, ground straps, and mounting 

hardware have been replaced. Be absolutely certain that you have replaced 
all the insulators.

4.  Look for unauthorized replacement parts, particularly transistors, that were 

installed during a previous repair. Point them out to the customer and 
recommend their replacement.

5.  Look for parts which, though functioning, show obvious signs of deterioration. 

Point them out to the customer and recommend their replacement.

6.  Check the line cords for cracks and abrasion. Recommend the replacement 

of any such line cord to the customer.

7.   Check the antenna terminals, metal trim, “metallized” knobs, screws, and 

all other exposed metal parts for AC leakage. Check leakage as described 
below.

Figure A. Using an AC voltmeter to check AC leakage.

XBR-52LX905/60LX905  

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The AC leakage from any exposed metal part to earth ground and from all 

exposed metal parts to any exposed metal part having a return to chassis, must 

not exceed 0.5 mA(500 microamperes). Leakage current can be measured by 

any one of three methods.

1.  A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. 

Follow the manufacturers’ instructions to use these instructions.

2.  A battery-operated AC milliampmeter. The Data Precision 245 digital 

multimeter is suitable for this job.

3.  Measuring the voltage drop across a resistor by means of a VOM or battery-

operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters 
must have an accurate low voltage scale.

 

The Simpson’s 250 and Sanwa SH-63TRD are examples of passive VOMs 
that are suitable. Nearly all battery-operated digital multimeters that have a 
2 VAC range are suitable (see Figure A).

A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw 

on most AC outlet boxes is also at earth ground.

If the retaining screw is to be used as your earth ground, verify that it is at 

ground by measuring the resistance between it and a cold-water pipe with an 

ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60-to 100-watt trouble-light (not 

a neon lamp) between the hot side of the receptacle and the retaining screw. 

Try both slots, if necessary, to locate the hot side on the line; the lamp should 

light at normal brilliance if the screw is at ground potential (see Figure B).

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

Figure B. Checking for earth ground.