DOWNLOAD Sony KDL-32BX305 / KDL-40BX405 Service Manual ↓ Size: 13.75 MB | Pages: 56 in PDF or view online for FREE

Model
KDL-32BX305 KDL-40BX405
Pages
56
Size
13.75 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LEVEL 3
File
kdl-32bx305-kdl-40bx405.pdf
Date

Sony KDL-32BX305 / KDL-40BX405 Service Manual ▷ View online

3
KDL-32BX305/40BX405
KDL-32BX305/40BX405 
WARNINGS AND CAUTIONS - ENGLISH
CAUTION
These servicing instructions are for use by qualifi ed 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 qualifi ed to do so.
CARRYING THE TV
• Carry the TV with the adequate number of people; larger size TVs require two or more people.
• Correct hand placement while carrying the TV is very important for safety and to avoid 
damage.
WARNING!!
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 identifi ed by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe operation. Replace 
these components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit adjustments that 
are critical for safe operation are identifi ed in this manual. Follow these procedures whenever critical components are replaced or improper operation is 
suspected. 
HANDLING THE GLASS ASSEMBLY
Gloves should be worn when handling the Glass Assembly to prevent leaving fi ngerprints or dirt on the glass.  
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KDL-32BX305/40BX405
KDL-32BX305/40BX405 
SAFETY-RELATED COMPONENT WARNING
There are critical components used in LCD color TVs that are important for safety. These components are identifi ed with shading and 
!
 
mark on the schematic diagrams and the electrical parts list. It is essential that these critical parts be replaced only with the part number 
specifi ed in the electrical parts list to prevent electric shock, fi re, or other hazard. 
NOTE: Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and 
            labor guarantee. 
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When installing the LCD panel on a wall, the LCD panel must be secured using the 4 mounting holes on the rear cover. 
To avoid damaging the LCD panel:
do not press on the panel or frame edge to avoid the risk of electric shock.
  do not scratch or press on the panel with any sharp objects.
  do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
  do not expose the LCD panel to direct sunlight.
  avoid contact with water. It may cause a short circuit within the module. 
  disconnect the AC adapter when replacing the backlight (CCFL) or inverter circuit. 
(High voltage occurs at the inverter circuit at 650Vrms.) 
  always clean the LCD panel with a soft cloth material.
  use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short. 
  protect the panel from ESD to avoid damaging the electronic circuit (C-MOS). 
  during the repair, DO NOT leave the Power On for more than 1 hour while the TV is face down on a cloth. 
LEAKAGE CURRENT HOT CHECK CIRCUIT
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KDL-32BX305/40BX405
KDL-32BX305/40BX405 
The circuit boards used in these models have been processed using 
Lead Free Solder. The boards are identified by the LF logo located 
close to the board designation e.g. H1 etc [ see example ]. The 
servicing of these boards requires special precautions to be taken as 
outlined below. 
example
It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints.  
Lead Free Solder is available under the following part numbers : 
Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade. 
This requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics. 
For more information on the use of Lead Free Solder, please refer to  
 http://www.sony-training.com
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KDL-32BX305/40BX405
KDL-32BX305/40BX405 
SAFETY CHECK-OUT
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.
Leakage Test
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).
How to Find a Good Earth Ground
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).
To Exposed Metal
Parts on Set
0.15 μF
Earth Ground
AC
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
Page of 56
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Sony KDL-32BX305 / KDL-40BX405 Service Manual ▷ Download

  • DOWNLOAD Sony KDL-32BX305 / KDL-40BX405 Service Manual ↓ Size: 13.75 MB | Pages: 56 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony KDL-32BX305 / KDL-40BX405 in PDF for free, which will help you to disassemble, recover, fix and repair Sony KDL-32BX305 / KDL-40BX405 TV. Information contained in Sony KDL-32BX305 / KDL-40BX405 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.