Sony KDL-43W750E Schematic

HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

SERVICE MANUAL (COMMON)

	Version	Date	Subject
1		02/2017	1st Issue.

202/2017 1. Add Segments KML, KMLW , KL , KLW .

2.Add Block and Connector Diagram for all segments

3.Add Note for Section 5 Circuit Board Location.

303/2017 1. Add Model Name on pg 3

GN3UN CHASSIS

Segment: KM, KMW KML, KMLW KL, KLW.

LCD TV

9-888-723-03

For SM - Unique , please refer :

9-888-723-Ax ( America ) 9-888-723-Cx ( China)

9-888-723-Ex ( Europe )

9-888-723-Px ( Pan Asia)

SERVICE MANUAL (COMMON)

GN3UN CHASSIS

Segment: KM, KMW

KML, KMLW

KL, KLW.

LCD TV

MODEL LIST

THIS SERVICE MANUAL CONTAINS COMMON INFORMATION FOR BELOW REGIONS AND MODELS:

REGION ASIA

SEGMENT KM

KMW

KML

KMLW

KL

AMERICA EUROPE CHINA

MODEL
KDL-32W6*E	KDL-40W6*E	KDL-49W6*E
KDL-32WE6*	KDL-40WE6*	KDL-49WE6*
KLV-32W6*E	KLV-40W6*E	KLV-49W6*E
KDL-32RE4*	KDL-40RE4*
KLV-32R4*E	KLV-40R4*E
KDL-43W750E	KDL-43W750E
KDL-43WE753	KDL-43WE753

KLW

KLV-43W772E

KLV-49W772E

	TABLE OF CONTENTS
Section Title	Page
1. SAFETY NOTES	5
2. SELF DIAGNOSTIC FUNCTION	14
3. TROUBLE SHOOTING	17
4. SERVICE ADJUSTMENTS	123
5. DIAGRAMS	151

Please refer to GN3UN Service Procedure for Panel , Board and Software Change /

Upgrade Manual , part number 9-888-724-0x in TISS .

Please refer Service Manual – Unique for below information : -Safety Warnings

-Wire Dressing -Circuit Board Location

-Disassembly and Exploded View.

Note: Pictures provided in this Service Manual might have slight difference from the actual sets.

4

SECTION 1

SAFETY NOTES

1-1. Warnings and Caution

1)These servicing instructions are for use by qualified service personnel only.

2)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.

3)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.

4)Be sure to follow these guidelines to protect your property and

avoid causing serious injury :

•Carry the TV with an adequate number of people; larger size TVs require two or more people.

•Correct hand placement while carrying the TV is very important for safety and to avoid damages.

5) Components identified by shading and ! mark on the exploded views, and in the parts list are critical for safe operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit adjustments that are critical for safe operation are identified in this manual. Follow these procedures whenever critical components are replaced or improper operation is suspected.

1-2. Caution Handling of LCD Panel

When repairing the LCD Panel, make sure you are grounded with a wrist band. When repairing the LCD Panel on the wall, the panel must be secured using the 4 mounting holes on the rear cover.

1)Do not press 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 temperature 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 short circuit within the module.

6)Disconnect the AC power 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 care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short circuit.

9)Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).

10)During the repair, DO NOT leave the Power On or Burn-in period for more than 1 hour while the TV is face down on a cloth.

Figure 1. TV is faced down on a cloth during repair.

5

1-3. Caution About the Lithium Battery

1) Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type.

2) Outer case broken battery should not contact to water.

1-4. Safety Check-Out

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 inter board wiring to ensure that no wires are pinched or

contact high-wattage resistors.

3)Check all control knobs, shields, covers, ground straps and mounting hardware have been replaced. Be absolutely certain 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, metalized knobs, screws and all other exposed metal parts for AC leakage. Check leakage test as described next.

8.For safety reasons, repairing the Power board and/or Inverter board is prohibited.

1-5.Leakage Test

(To protect electric shock when customer touch the terminal.)

Leakage current can be measured by V: Voltmeter or oscilloscope (r.m.s. or peak reading)

Stabilized power supply instrument and isolated voltage transformer: Use too much current capacity and isolated voltage transformer does not need to use stabilized power supply equipment.

Specification of RMS volt meter: Input resistance > 1 Mohm, Input capacitance < 200 pF, Frequency range: 15 Hz – 1MHz . Refer Figure 1. Isolated type volt -meter (FLUKE 8921A etc *1)

*1 Not use FLUKE 8920A that connected to protective earth by diode

#Leakage current of measurement instrument is less than 10μArms when under test equipment AC plug is opened

#Set up the following condition and turn on the set. Applied voltage: Nominal input voltage (Description on Nameplate)

#Measure the leakage current between one phase conductor and neutral for terminal 1 and terminal

2. Read rms value, and then calculate to peak value PEAK VALUE =√2 RMS VALUE

Comply with the following requirement

Class II equipment (2-pin plug): for each terminal, the worst value of measurement must not exceed AC 283uA peak).

Note: including AC adaptor, AC adaptor/DC operated unit combination Note: Products which are always used in touch with human body: 141uA (peak)

Note: As for products destined for Southeast Asia (Rod Antenna is accessory. Or it is packed with a product.), the worst value must not exceed AC 141uA (peak).

Figure 1 – Measuring network for Leakage Current

6

1-6. How to Find a Good Earth Ground

1)A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw on most AC outlet boxes is also at earth ground.

2)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.

3)If a cold-water pipe is not accessible, connect a 60to 100-watt troublelight (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 3).

Figure 3. Checking for earth ground.

1-7. Lead Free Information

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.

Figure 4: LF Logo

Figure 5: LF logo on circuit board

The servicing of these boards requires special precautions. It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints.

7

1-8. Handling the FLEXIBLE FLAT CABLE (FFC) ( continue )

8

1-8. Handling the FLEXIBLE FLAT CABLE (FFC) ( continue )

9

1-8. Handling the FLEXIBLE FLAT CABLE (FFC) ( continue )

10

1-9. Solder-less tuner replacement procedure

Tuner Module treatment way

The insertion & extraction angle of the module is permitted to specified degree for connector

θ 20°

Push down to screw.

For removing Tuner Module,

After un screwed, Automatically the Module will float to correct degree.

So please extract it with keeping this degree.

20°

20°	Reference paper for 20 degree
	(If need please use for fit by cutting this paper)

11

1-9. Solder-less tuner replacement procedure (Cont. )

12

1-9. Solder-less tuner replacement procedure ( Cont. )

13

SECTION 2

SELF DIAGNOSTIC FUNCTION

LED Indicator

•Lights up in white when you select “Picture Off”.

•Lights up in amber when you set the timer or “Photo Frame Mode”.

•Lights up in white when the TV is turned on.

•Flashes while the remote is being operated.

	Status	LED Colour	Remarks
	Power Off	OFF	*1 power switch off (by Side
	( AC Off and *1)		Key)
	Power On	White
	Standby	OFF
	( by remote control off
	and Side Key off)
	Picture Off	White
	Set "Sleep Timer"	Amber
	Set "On Timer"	Amber
	( Power On )
	Set "On Timer"	Amber
	( Standby )
	Picture Frame	Amber
	Failure	Red Blinking	The number of LED blinking
			indicates cause of failure.
	Error of panel ID	Amber / Green Blinking	Blinking:0.5sec Amber/ 0.5sec
			Green
	Software Updating	Amber Blinking	Blinking: 1sec On / 1sec Off
	Software Updating	Amber / Red Blinking	Blinking:1 sec Amber/ 1sec Red
	failure

Amber = Red + Green

14

	The Number of Standby LED	Error Detection		Error Location
	(RED blinking)
	2	Main Power Error	AC Adaptor
	3	Audio Error	Main Board or Sub Board (LK)
	4	Panel Power Error	Main Board
	5	Panel I2C Comm Error	Main Board or Source Board
	6	Backlight Error	Main Board or Sub Board (LK)

Tuner Demod Error, BE_I2C Error and PMIC_I2C do not go to Safety Shutdown and do not have RED blinking.

Error Detection	Symptoms	Error Location
Tuner Demod Error	Cannot tune Digital RF/ Analog RF	Main Board/Tuner Module
BE I2C Error	No picture display	Main Board
PMIC I2C error	No power	Main Board

LED Pattern

When safety shutdown occurs, Standby LED display reports the cause by using the lightning patterns as indicated below.

0.5sec	3.0sec	3.0sec

0.5sec

Example: The figure above shows LED display when SHUTDOWN is caused by Audio Error.

It repeats flashing for a specified number of times in 0.5sec/cycle and has a 3 seconds interval of lighting off. Please note that a 3 seconds interval of lighting off is fixed regardless of abnormal state types.

15

Triage Chart

Before you make the service call…

1.Confirm the symptom from the customer.

2.Select that symptom from the chart.

3.Bring all the boards and cables listed for that symptom.

4.Follow the troubleshooting charts in the technical guides to isolate the board.

5.Chart Color Code

RED DOT: Most likely defective part

BLUE TRIANGLE: Secondary possible defective part ABC BLACK TEXT: Board that may correct the symptom

GN3UN Chassis

Symptoms - Shutdown. Power LED

No

Video

Smart Core

Bluetooth

blinking red diagnostics sequences

Power

- missing or distorted

Remote

Network

Audio

(KL) / LED

(BT)

(KM)

Reference

No White Power

Stationary

No

No

Bluetooth

Wireless

Smart Core

/ One Step

2

3

4

5

6

7

8

9

10

LED & does not

colored

video

video

No

No

can't

no LED (Set

Remote

reponse to remote

lines or

One of

all

Remote

connect

Audio

is still alive)

(OSR)can't

(Dead Set)

dots

Inputs

Inputs

connect

B* Board





















LK* Board











H* Board







K* Board





Speaker &





Subwoofer

Wifi Module



Adaptor





Tcon









LCD Panel











16

SECTION 3

Trouble Shooting Flow

3a Trouble Shooting Flow 2x blinking – Main Power Error

Section Problem/Issue	Title

	3	2x blinking –	3a.1	2x blinking – Main Power Error
		Main Power Error

17

3a.1. 2x Blinking – Main Power Error

LK Board

2 times Blinking

*For LK2

		Adaptor		-ve
LK-Board
	No	Take out adaptor	No
Check DC voltage at
		and check the output voltage.	Change
Q6020/ *Q6022
		18V – 22.5V?	Adaptor	+ve
18V – 22.5V?
		(Refer Figure 1)
*Typical: 19.5V
		*Typical: 19.5V
				Ensure that
				+ve probe is
Yes				touching the
		Yes		needle.

	Change LK-				Change LK-
	board				Board

Figure 1: How to check adaptor’s output voltage.

18

3a.1 : 2x Blinking – Main Power Error

LK Board (Checking point)

Board Name Board PWB (A side)	Detail

LK1

(Q6020)

Q6020

19.5

V

	LK2
	(Q6020 &
	Q6022)		Q6020 &
		19.5
			Q6022
		V

19

3b Trouble Shooting Flow 3x blinking – Audio Error

	Section Problem/Issue	Title

	3	3x blinking –	3b.1	3x blinking – Audio Error
		Audio Error

20

3b.1 : 3x Blinking – Audio Error
				Important Note :
				TV must be power OFF condition before	plug
	START			or unplug any of the FFC/FPC /wire / cable
LK Board				from the board. -> This is to prevent
		3x blinking		possibility circuit damage happen.

FFC not insert correctly

Check FFC correct insert?

Insert FFC correctly

3x blinking

3x blinking

Wrong Option bit

Check correct Option bit is set?

B-board Audio Error pin

Correct Option bit & 3x blinking

short to GND

Disconnect B-board to LK-board FFC

3x blinking

Set correct Option bit and

No 3x blinking

Change B-board

and check Audio Error pin

perform AC OFF - ON

Audio Error pin no short to GND

Remove Speaker Connector

No 3x blinking

Check Speaker harness and

LK-board Audio Error pin

at CN4001/CN4002 and

short to GND

Speaker impedance

perform AC OFF - ON

Speaker harness

Main or Assist Speaker

3x blinking

3x blinking

shorted

Impedance ≠ 6~8 Ω

No connectivity of F4001

Check connectivity

Change

Change Main

of F4001

Speaker

or Assist

3x blinking & F4001 OK

Harness

Speaker

F4001 broken,

3x blinking

Check connectivity

Replace

of F4101

Connect back

F4001

No connectivity of F4101

3x blinking & F4101 OK

Speaker Connector

to CN4001/CN4002 and

3x blinking

F4101 broken,

perform AC OFF - ON

Replace

#Audio IC (IC4001/IC4101) problem

F4101

For model with Assist Speaker only

Change LK-board

No 3x blinking

No 3x blinking

DONE

Note : IC4101 and F4101 available to check for model with woofer (Assist Speaker) only.

21

3b.1 : 3x Blinking – Audio Error

	LK Board			Important Note :
				TV must be power OFF condition before
	(#Audio IC (IC4001/IC4101) problem)
				plug or unplug any of the FFC/FPC/wire
				/cable from the board. -> This is to prevent
		START		possibility circuit damage happen.
		#Audio IC (IC4001/IC4101) problem		Remember enable back Error Detection if
		3x blinking and F4001 & F4101 OK		previously have disable it.

Check Audio IC pins and surrounding part,

Replace the NG part if have any

No 3x blinking

(For example, fuse broken, e.capacitor blow,

c.capacitor short connection, zener diode open or short,

inductor open connection and etc.)

3x blinking

No 3x blinking

Check have any burn mark on Audio IC,

If have burn mark, replace the NG Audio IC

3x blinking

Main Speaker No Sound

Disable Error Detection,

IC4001 problem, Change IC4001,

No 3x blinking

(Ignore Assist Speaker if have)

Mount back F4101 if have removed,

Remove F4101 if have

Enable back Error Detection

3x blinking

Assist Speaker No Sound

For model with

Disable Error Detection,

IC4101 problem, Change IC4101,

No 3x blinking

(Ignore Main Speaker)

Mount back F4001 & F4101 if have removed,

Assist Speaker only

Remove F4001

Enable back Error Detection

3x blinking

Change LK-board

DONE

Note : IC4101 and F4101 available to check for model with woofer (Assist Speaker) only.

22

		3b.1 : 3x Blinking – Audio Error	Important Note :
	LK1/2 Board (FFC insertion)
			TV must be power OFF condition before
	Same apply to B-board FFC connector side
			plug or unplug any of the FFC/FPC/wire
			/cable from the board. -> This is to prevent
			possibility circuit damage happen.

OK example		NG example		NG example

Guide at	Guide at
Connector	FFC

NG example

FFC guide need insert fully over the connector guide

23

3b.1 : 3x Blinking – Audio Error

BLM Board (Checking Point)

	Board
	PWB	BLM (KM, KMW, KML, KMLW, KL, KLW)	Details
	(A side)

Checking Audio Error pin not short to GND

CN9601

Details

Audio Error pin

Main IC (IC5000)

24

3b.1 : 3x Blinking – Audio Error

LK1/2 Board (Checking Point)

	Board PWB	LK1 (KM, KMW, KML, KMLW, KL, KLW)	LK2 (KL, KLW)
	(A side)

Detail refer next slide

	Details
			CN4001/CN4002		Details
							CN4001/CN4002

25

3b.1 : 3x Blinking – Audio Error

LK1/2 Board (Checking Point)

	Board PWB	Details
	(A side)

Purpose : Checking Audio Error pin not short to GND

Checking fuse condition

Change Audio IC	Audio Error pin
if need	Zener Diode
Audio IC each pin
checking, please
refer to “Audio	IC4101
No Sound”
	IC4001

F4001

F4101

26

3c Trouble Shooting Flow 4x blinking – Panel Power Error

	Section Problem/Issue	Title

3	4x blinking –	3c.1	4x blinking – Panel Power Error
	Panel Power Error

27

3c.1 : 4x Blinking – Panel Power Error

BLM Board

TV was in

Start

standby

Yes

No

*Check LK board FFC

TV turn on

Or LVDS FFC

Normally?

RC ON

No

No

Check PANEL_PWR

TV boot up normally?

3.00V-3.33V?

Yes

No

Yes

Yes

Check voltage at

+12V_PANEL

11-V-12.82V?

End

Replace

Main IC / B-

Board

B-Board/Main

IC problem

Yes

TV turn on

Normally?

No

Replace

LK board

Yes

TV turn on

Normally?

No

Replace O-cell/

Panel module

LK board problem

*Check LK board FFC Or LVDS FFC

Step 1: Remove and reinsert both FFC in correct position Step 2: Replace with new FFC

28

BLM layout

PANEL_PWR

+12V_PANEL line

Q6001

Only present in EU regions

29

3d Trouble Shooting Flow 5x blinking – Panel I2C Error

	Section Problem/Issue	Title

	3	5x blinking –	3d.1	5x blinking – Panel I2C Error
		Panel I2C Error

30