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KDL-22BX325/32BX325/32BX425/40BX425  

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KDL-22BX325 Only ............................................................................................................................................................................... 20
KDL-32BX325 Only ............................................................................................................................................................................... 21
KDL-32BX425 Only ............................................................................................................................................................................... 22
KDL-40BX425 Only ............................................................................................................................................................................... 23

KDL-22BX325/32BX325/32BX425/40BX425  

1

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing 

other than that contained in the operating instructions unless you are qualified to do so.

KDL-22BX325 Only

KDL-32BX325/32BX425/40BX425 Only

Tenga en cuenta lo siguiente al configurar el TV:

• Desconecte todos los cables para transportar el TV.
• Para transportar el TV asegúrese de contar con la cantidad suficiente de personas; para los TV 

de gran tamaño se necesitan dos o más personas.

• Es muy importante la colocación correcta de las manos para trasladar el TV, por seguridad y 

para evitar cualquier daño.

An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this 

receiver is directly connected to the AC power line.

!

 SAFETY-RELATED COMPONENT WARNING!!

Components identified by shading and ! mark on the exploded views are critical for safe operation. 

Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. It is 

essential that all critical parts be replaced only with the part number specified in this manual to prevent electric shock, fire, or other hazard.

Circuit adjustments that are critical for safe operation are identified in this manual. 

Follow these procedures whenever critical components are replaced or improper operation is suspected. 

NOTE: Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and 

labor guarantee.

KDL-22BX325/32BX325/32BX425/40BX425  

2

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 (CCFL) 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.

KDL-22BX325/32BX325/32BX425/40BX425  

3

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.