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– 5 –

!

These servicing instructions are for use by qualified service
personnel only.
To reduce the risk of electric shock, do not perform any servicing
other than that contained in the operating instructions unless you
are qualified to do so.

An isolation transformer should be used during any service to
avoid possible shock hazard, because of live chassis.
The chassis of this receiver is directly connected to the ac power
line.

When installing the LCD panel, be sure you are grounded by using a
wrist band.
When installing 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 adapter 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 cere 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).

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 contact 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.

LEAKAGE  TEST
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).

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 k Ω

0.15 µF

It is essential that all critical parts be replaced only with the part
number specified in the electrical parts list to prevent electric
shock, fire, or other hazard.
NOTE: Do not modify the original design without obtaining written

permission from the manufacturer or you will void the original
parts and labor guarantee.

– 6 –

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. U1 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

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).

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Figure B. Checking for earth ground.

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

– 7 –

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.

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 .

Number of times STANDBY LED

Monitoring Items

Diagnostic Item Description

(Red) flashes

(Screen Display)

2 times

POW OVP

Main Power Over Voltage Protection

3 times

POW ERR1

Power Error

5 times

T_CON

T_CON Error

6 times

BACKLITE

Back Light Error (Panel Inverter)

7 times

TEMP ERR

Temperature Abnormal Detection

8 times

AUD PROT

Audio Abnormal Detection

9 times

FAN_ERR

FAN Error (Not Detected. Display Only)

10 times

DTT ERR

DTAU Power

13 times

BALANCER

Panel Balancer Error

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY lamp from flashing.

2 times

4 times

5 times

LED ON  0.3 sec.

LED OFF 0.3 sec.

LED OFF

3 sec. 

[ FLASH COUNT ]

Note: One flash counts is not self-diagnostic.

STANDBY 
INDICATOR

– 8 –

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to
bring up past occurrences of failure for confirmation on the screen.

In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
After you have completed the repairs, clear the result display to “0”.

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

5

* : Note that this differs from entering the service mode (volume +)

( Number button )

* 

( Volume )

( TV standby )

( Info )

SELF CHECK

002
003
005

006
007
008
009

010
013

POW OVP
POW ERR1
T_CON

BACKLITE
TEMP ERR
AUD PROT
FAN_ERR

DTT ERR
BALANCER

0000000000
0000000000
0000000000

0000000000
0000000000
0000000000
0000000000

0000000000
0000000000

0000000000
0000000000
0000000000

0000000000
0000000000
0000000000
0000000000

0000000000
0000000000

0000000000
0000000000
0000000000

0000000000
0000000000
0000000000
0000000000

0000000000
0000000000

00
00
00

00
00
00
00

00
00

Monitoring Items

For details, refer to "1-1. DIAGNOSTIC TEST INDICATORS"

[ SELF-DIAGNOSTIC SCREEN DISPLAY ]

Number of times STANDBY Indicator flashes