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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 TIMER 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 TIMER 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 TIMER 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.

POWER LED

Green LED

* Light is green when the TV set is on
* Light is amber when the timer is set.
* Light is green when the Picture Off feature is activated.
* Blinks red when indicating the TV may need servicing.

TIMER 

LED

Amber/Green/Red  LED

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 is the SAME as accessing Service Adjustments.

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

Software Version:
TVM: ER3.2
SUBM: 1.4
NVM: 1.2

Model Name:

Stored data from ADC 
calibration (from 
factory)

Diagnosis Information

Protection name and 
LED blinking times

How many times each 
protection has been 
activated

2: MAIN_POWER

0

6: BL (Back Light)

0

Í 0 indicates no error was detected

3: DC_ALERT1

0

7: TEMP

1

Í 1 indicates an error was detected

4: DC_ALERT2

0

7: Audio

0

5: DC_ALERT3

0

1.  In Service Mode, press the Channel  8   

Channel 

0 .

1   Remove 16 screws from Rear Cover, +BVTP2 4X16
2   Remove 2 screws from Rear Cover arm positions, +PSW M5X16
3   Remove 2 screws from Terminals, +BVTP 3X12 TYPE2 TT(B)

1   Remove 2 screws from bottom of VESA Arms, +PSW M5X16
2   Remove 2 screws from Under Cover and Bezel, +BVTP2 4X16
3   Remove 4 screws from Stand and Stand Holder, +BVTP2 4X16

3

1

2

Bezel

Rear Cover

3

1

2

Bottom Bracket

Top Brackets

Stand Assembly

Under Cover

VESA Arms