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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.

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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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 POWER/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 POWER/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 POWER/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.

Orange or Green

Lights up in orange when the Timer or Sleep Timer is 
set. Lights up and/or blinks
in orange during a software upgrade.
Lights up in green when the Power Saving is set to 
Picture Off.

Orange

Lights up when the TV receives HD signal including up 
converted signals.

Green or Red

Lights up in red when your TV is in PC power saving 
mode or during the software upgrade. Lights up in green
when the TV is turned on. If the LED blinks in red
continuously, this may indicate that the TV needs 
servicing.

Main Power

 2 times

G6N Board (40") G7N Board (46" & 52") Board

DC Alert1

3 times

BU Board
G6N Board (40") G7N Board (46" & 52") Board

DC Alert3

5 times

Not used in these models

Backlight

6 times

BU Board
G6N Board (40") G7N Board (46" & 52") Board
Inverter Boards -D1N Board & D2N Board (40" & 46"), D4N Board & D5 Board (52")

Temp Err

7 times

BU Board

Audio Prot

8 times

BU Board

Fan Err

9 times

Not used in these models

DTT WDT

10 times

Watch Dog Timer used to track micro processors, not to record errors.

Trident IC

11 times

BU Board

HFR Err

12 times

LCD Panel

Balancer

13 times

LCD Panel
Inverter Boards -D1N Board & D2N Board (40" & 46"), D4N Board & D5 Board (52")

TCON Err

14 times

LCD Panel

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.

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

 

DIAGNOSTICS  

 

Page 

1

002  MAIN POWER   

 

001

003  DC ALERT 1 

 

 

000

012  HFR ERR 

 

 

000

006  BACKLIGHT 

 

 

000

007  TEMP ERR 

 

 

000

008  AUDIO PROT   

 

000

009  FAN ERR 

 

 

000

010  DTT WDT 

 

 

000

005  DC ALERT3 

 

 

000

013  BALANCER 

 

 

000

000  POWER ON TIME 

 

00008

001  BOOT COUNT   

 

00031

002  PANEL ON TIME 

 

00008

SELF CHECK

3. To display page 2, press 4 .

 

DIAGNOSTICS  

 

Page 

2

014  TCON ERR 

 

 

000

000  POWER ON TIME 

 

00008

001  BOOT COUNT   

 

00031

002  PANEL ON TIME 

 

00008

SELF CHECK

4. To display page 1, press 1 .

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

Clearing the Self Check Diagnostic List
1.  In Service Mode, press the Channel  8   

Channel 

0 .