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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.

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).

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.

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED indicator 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 STANDBY LED fl ash 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.

When an error occurs, the STANDBY LED indicator will fl ash a set number of times to indicate the possible cause of the problem. If there is more than 
one error, the indicator will identify the fi rst of the problem areas.

* Lights up in green when the TV set is turned on.

STANDBY LED

PIC OFF/
TIMER
LED

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

* Lights up in amber when the sleep timer is set.
  

POWER LED

Amber LED

Green LED

Red LED

* If LED blinks continuously, this may indicate 
   that the TV needs servicing.

2 times

Main Power Failure

BT2 Board
GT3 Board 

4 times

5V Power Failure

BT2 Board

6 times

Backlight error

BT2 Board
GT3 Board 
LCD Panel

7 times

Internal Temperature Failure

GT3 Board

8 times

Audio Failure

BT2 Board
GT3 Board
Speaker

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 

-  

   POWER .

 

The Self Check list displays. 

          

  This differs from accessing Service Adjustments.

Results for all of the following diagnostic items are displayed on screen.  No error has occurred if the screen displays a “0”.

SELF CHECK

002 MAIN POWER ERROR

01

Í 1 indicates an error was detected

004 5V POWER ERROR

00

Í 0 indicates no error was detected

006 BACK LIGHT ERROR

00

007 TEMP ERROR

00

008 AUDIO ERROR

00

00009  00027  00009 

Ï

ÏÏ Total Panel Hours

Ï

Ï Boot Count

Ï Total Hours of Operation 

BACK

1.  In Service Mode, press the Channel  8   

Channel 

0 .

2.  To exit Self Check display, turn the power off. 

1   Remove 17 screws from Rear Cover

2   Remove 1 screw from Side Jack position

3   Remove 1 screw from Terminal position

4   Remove 1 screw from Rear Cover

1   Slide out Button Cover from Bezel 

2   Disconnect 1 connector from HB2 Board

3   Remove 5 screws and release HB2 Board from Button Cover

1 Screw, +BVTP2 4X16

TYPE2 IT-3

2 Screw, +BVTP 3X12

TYPE2 IT-3

3 Screw, +BVTP 3X12

TYPE2 IT-3

Rear Cover

Bezel

4 Screw, +PSW M5X8

Bezel

Button Cover

Multi Button

HB2 Board

1

2

3