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KDL-46/52V4800 (CH)     5

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).

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).

µ

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

KDL-46/52V4800 (CH)     6

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 .

2 times

DC_DET

Main Supply Voltage (12V) Error.

6 times

PANEL_DET

Panel detect Error.

7 times

TEMPERATURE

monitor an Increase of an Inside-temperature.

8 times

AUDIO

Audio error (SP protect).

9 times

HFR

HFR Error (for EMH and Cumin).

10 times

DEF

DEF (Digital Front End module) Error.

11 times

NVM

EEPROM Error (notread/write availble).

12 times

I2C

VCT I2C Bus Error.

13 times

BALANCER

Panel Balance Error.

14 times

HDMI

HDCP cannot be setup correctly.

15 times

TUNER

If circuit of PLL circuit  do not respond to I”C commands.

16 times

I2C CH1

I2C CH1Error in VERD.

17 times

I2C CH0

I2C CH0 Error in VERD.

18 times

DIGITAL DEMOD

?

19 times

USB

USB over current detected.

20 times

CI

CI Error

21 times

VCT

No DPI-I2C

22 times

MSP

MSP3410G IC does not respond to I2C commands.

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

2 times

4 times

5 times

LED ON  0.3 sec.

LED OFF 0.3 sec.

LED OFF

2 sec. 

[ FLASH COUNT ]

Note: One flash counts is not self-diagnostic.

KDL-46/52V4800 (CH)     7

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 clear the result display to “0”, press button on the remote commander sequentially as shown below when the diagnostic screen is being
displayed.

<Delection of Error Count and Error History>

Press “

8

” button   

,

   Press “

-

” button

<Delection of Panel Operation Time>

Press “

7

” button   

,

   Press “

-

” button

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 +)

Monitoring Items

Error Count Record

[ SELF-DIAGNOSTIC SCREEN DISPLAY ]

KDL-46/52V4800 (CH)     8

1-1.

KDL-46V4800 ........................................................ 1-1

1-1-1.

REAR COVER AND STANDBY ASSY

REMOVAL ...................................................... 1-1

1-1-2.

AC INLET AND UNDER COVER

REMOVAL ...................................................... 1-2

1-1-3.

BGC AND IP5 BOARDS REMOVAL ........... 1-3

1-1-4.

FRAME REMOVAL ....................................... 1-4

1-1-5.

LOUDSPEAKER (L) REMOVAL .................. 1-5

1-1-6.

LOUDSPEAKER (R) REMOVAL ................. 1-5

1-1-7.

LCD PANEL, H3E AND H4 BOARDS

REMOVAL ...................................................... 1-6

1-2.

KDL-52V4800 ........................................................ 1-7

1-2-1.

REAR COVER AND STANDBY ASSY

REMOVAL ...................................................... 1-7

1-2-2.

AC INLET AND UNDER COVER

REMOVAL ...................................................... 1-8

1-2-3.

BGC, D4, D5 AND IP5 BOARDS

REMOVAL ...................................................... 1-9

1-2-4.

FRAME REMOVAL ..................................... 1-10

1-2-5.

LOUDSPEAKER (L) REMOVAL ................ 1-11

1-2-6.

LOUDSPEAKER (R) REMOVAL ............... 1-11

1-2-7.

LCD PANEL, H3E AND H4 BOARDS

REMOVAL .................................................... 1-12

2-1.

TRIAGE CHART ................................................... 2-1

2-2.

FLOW CHART ...................................................... 2-2

2-3.

No Power (Flow Chart_B) ..................................... 2-3

2-4.

Self Diagnosis ......................................................... 2-4

2-4-1.

Self Diagnosis (Flow Chart_C) ....................... 2-5

2-4-2.

POWER_DET (RED 2 times blink) ................ 2-6

2-4-3.

Back light Error (RED 6 times blink) ............. 2-6

2-4-4.

Temp Error (RED 7 times blink) ..................... 2-7

2-4-5.

Audio Error (RED 8 times blink) .................... 2-7

2-4-6.

DEF Error (RED 10 times blink) ..................... 2-8

2-4-7.

NVM Error (RED 11 times blink) ................... 2-8

2-4-8.

I2C Error (RED 12 times blink) ...................... 2-8

2-4-9.

Balancer Error (RED 13 times blink) .............. 2-9

2-4-10. HDMI Error (RED 14 times blink) .................. 2-9

2-4-11. Tuner Error (RED 15 times blink) ................... 2-9

2-4-12. I2C-CH1 Error (RED 16 times blink) ........... 2-10

2-4-13. I2C-CH0 Error (RED 17 times blink) ........... 2-10

2-4-14. Digital modulator Error

(RED 18 times blink) ..................................... 2-10

2-4-15. USB Error (RED 19 times blink) .................. 2-11

2-4-16. VCTP Error (RED 21 times blink) ................ 2-11

2-5. Audio Problem (Flow Chart_D) ............................. 2-12

2-6. Video Ploblem (Flow Chart_E) .............................. 2-13

3-1.

BLOCK DIAGRAM .............................................. 3-1

3-2.

CIRCUIT BOARDS LOCATION ......................... 3-2

(1)

KDL-46V4800 ................................................. 3-2

(2)

KDL-52V4800 ................................................. 3-2

4-1.

KDL-46V4800 ........................................................ 4-2

4-1-1.

REAR COVER AND STAND ASSY ............. 4-2

4-1-2.

BGC BOARD, IP5 BOARD AND SWITCH

UNIT ................................................................ 4-3

4-1-3.

BEZEL, LCD PANEL, H3E BOARD AND

H4 BOARD ...................................................... 4-4

4-1-4.

CONNECTOR ASSY ...................................... 4-5

4-2.

KDL-52V4800 ........................................................ 4-6

4-2-1.

REAR COVER AND STAND ASSY ............. 4-6

4-2-2.

BGC BOARD, D4 BOARD, D5 BOARD AND

SWITCH UNIT ................................................ 4-7

4-2-3.

BEZEL, LCD PANEL, H3E BOARD AND

H4 BOARD ...................................................... 4-8

4-2-4.

CONNECTOR ASSY ...................................... 4-9

4-3.

PACKING MATERIALS .................................... 4-10

4-3-1.

KDL-46V4800 ............................................... 4-10

4-3-2.

KDL-52V4800 ............................................... 4-11