DOWNLOAD Sony KDL-40XBR3 / KDL-46XBR3 Service Manual ↓ Size: 28.81 MB | Pages: 127 in PDF or view online for FREE

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.

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 A. Using an AC voltmeter to check AC leakage.

Figure B. Checking for earth ground.

* Light when the TV set is on

* Functions as failure indicator

STANDBY LED

PIC OFF/TIMER

LED

* Lights up in red when TV is in PC standby mode.

* Lights up when Picture Off is activated

* Lights up in orange when the timer is set

  When timer is set, the LED remains lit even

  when the TV is turned off.

POWER LED

Green LED

Green LED

Red LED

The units in this manual contain a self-diagnostic function. If an error occurs, the POWER LED will automatically begin to fl ash. The number of times 
the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER LED fl ash indicators is listed in the instruction manual for 
the user’s knowledge and reference. If an error symptom is diffi cult to reproduced use the Remote Commander to display the record that is stored at 
the internal NVM to specify the cause of the failure.

Diagnostic Test Indicators
When an error occurs, the POWER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one error, 
the LED will identify the fi rst of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest fl ashes is identifi ed fi rst.
Results for all of the following diagnostic items are displayed on screen.  No error has occurred if the screen displays a “0”.

1.  TV must be in standby mode. (Power off).

2.  Press the following buttons on the Remote Commander within a second of each other: 

 

DISPLAY   

Channel 

5   

Volume 

-  

  TV POWER .

 

The Self Check list displays.

 

 

 

    This 

differs 

from 

accessing 

Service 

Adjustments.

002 :

TEMP

Panel Temp Error

000

003 :

P_OVP

Power_OVP

000

006 :

POWER

Power_Error

000

0 indicates no error was detected

007 :

AUDIO

Audio Protector

001

1 indicates an error was detected

009 :

PANEL

Panel Error

000

101 : DTT_WDT

000

(Watch Dog Timers

102 : TVM_WDT

000

 are used to track 

103 : WEM_WDT

000

micro processors, 

104 : DEM_WDT

000

not to record errors.)

WDT- Watch Dog Timers

☛

 

Rear Cabinet Assembly

5

4

3

2

1

Two screws 
(+PSW M5X12)

 

Two screws 
(+BVST 4X12) 

One screw 
(+BVST 4X8) 

One screw 
(+BVTP 3X12) 

Fourteen screws 
(+BVTP2 4X16)