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KDL-32/40/46/55EX500(HK,WB,AUS,NZ,SG,ZA)

6

When repairing the LCD panel, be sure you are grounded by using a wrist band.
When repairing the LCD panel on the wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.

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)  It is recommended not to exceed 1 hour of Power-On nor Burn-in period with LCD panel face down condition, in repair activity. 

> 1 hour

KDL-32/40/46/55EX500(HK,WB,AUS,NZ,SG,ZA)

7

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.

8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.

KDL-32/40/46/55EX500(HK,WB,AUS,NZ,SG,ZA)

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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).

KDL-32/40/46/55EX500(HK,WB,AUS,NZ,SG,ZA)

9

DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash 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 first of the 

problem areas.
Result for all of the following diagnostic items are displayed on 

screen.
If the screen displays a “0”, no error has occurred .

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.

The number of times the LED flashes translates to a probable source of the problem.

A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference.

If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past 

problems and how often these problems occur.

2

MAIN_POWE

Main Power Over Voltage Protection

DC_ALERT

DC_ALERT

DTT_WDT

DTT Error

AUD_PROT

Audio Abnorm al Detection

4

BALANCER_

Panel Balancer Error

TCON_ERR

T-CON Error

HFR_ERR

HFR Error

P_ID_ERR

Panel ID NVM Error

6

BACKLITE_

Back Light Error (Panel Inverter)

TEMP_ERR

Thermal Error

FAN_ERR

FAN Error (Not Detected. Display Only)

8

-

Not 

u

sed

9

-

Not 

u

sed

10

-

Not used

11

-

Not used

12

-

Not used

-

RGB_SEN

RGB Sensor ACK Error

3

5

7