Sony klv 32w400a, klv 40w400a, klv 46w400a, klv 52w400a schematic

KLV-32W400A/40W400A/46W400A/52W400A

SERVICE MANUAL

E Model

India Model

Indonesia Model

Middle East Model

Thailand Model

Philippines Model

Saudi Arabia Model

South Africa Model

RM-GA011 KLV-32W400A/40W400A/46W400A/52W400A

EX1 CHASSIS

LCD Colour TV

SPECIFICATIONS

KLV-32/40/46/52W400A (GA) 2

KLV-32/40/46/52W400A (GA) 3

WARNINGS AND CAUTIONS

CAUTION

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.

WARNING!!

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.

!SAFETY-RELATED COMPONENT

WARNING!!

Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements

published by Sony.

SAFETY-RELATED COMPONENT

WARNING

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.

USE CAUTION WHEN HANDLING THE LCD PANEL

When repairing the LCD panel, be sure you are grounded by using a wrist band.

When repairing 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 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.

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

KLV-32/40/46/52W400A (GA) 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 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.

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).

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 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 B).

To Exposed Metal

Parts on Set

Trouble Light

Ohmmeter

AC Outlet Box

AC

0.15 F Voltmeter

(0.75V)

Cold-water Pipe

Earth Ground

FigureA. Using an AC voltmeter to check AC leakage.

Figure B. Checking for earth ground.

KLV-32/40/46/52W400A (GA) 5

SELF DIAGNOSIS FUNCTION

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.

1-1. DIAGNOSTIC TEST INDICATORS

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 STANDY LED	Monitoring Items	Diagnostic Item Description
	(Red) flashes	(Screen Display)
	2 times	DC_DET	Main power supply voltage error (12V, etc)
	3 times	DC_ALERT1	Malfunction of 3.3V line (Trident circuit, etc)
	4 times	DC_ALERT2	Malfunction of 5V line
			(Voltage Supply to FE, etc)
	5 times	DC_ALERT3	Malfunction of power supply for screen
	6 times	BACKLIGHT	Malfunction of inverter or overcurrent, etc
	7 times	TEMPERATURE	Abnormal temperature inside unit
	8 times	AUDIO	Audio circuit error (amplifier, etc.)
	10 times	DEF	Digital FE circuit error
	11 times	B-ENGINE	Malfunction of Trident IC or around IC
	12 times	HFR	BH board error
	13 times	(No item on screen display)	Malfunction of balancer

1-2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT

[ FLASH COUNT ] 2 times

4 times

5 times

	LED ON 0.3 sec.
									LED OFF
	LED OFF 0.3 sec.
										2 sec.

Note: One flash counts is not self-diagnostic.

STANDBY LED

1-3. STOPPING THE STANDBY FLASH

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

KLV-32/40/46/52W400A (GA) 6

1-4. SELF-DIAGNOSTIC SCREEN DISPLAY

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:

1-4-1. To Bring Up Screen Test

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

5

( Info/Text reveal ) ( Number button ) * ( Volume ) ( TV standby )

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

[ SELF-DIAGNOSTIC SCREEN DISPLAY ]

TV

DC_DET	0
DC_ALEAT1	0
DC_ALERT2	0
DC_ALERT3	0
BACKLIGHT	0
TEMPERATURE	0
AUDIO	0
DFE	0
B-ENGINE	0
HFR	0

Error Count Record

Number "0": means that no fault detected.

Number "1": means a fault was detected one time only.

Monitoring Items

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

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”.

1-5. Quitting Self-diagnostic screen

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

KLV-32/40/46/52W400A (GA) 7

TABLE OF CONTENTS

SAFETY CHECK-OUT .............................................		5	2.	DIAGRAMS .....................................................			2-1
				2-1.	CIRCUIT BOARDS LOCATION .........................		2-1
SELF DIAGNOSIS FUNCTION ................................		6			(1)	KLV-32W400A ................................................	2-1
					(2)	KLV-40W400A ................................................	2-1
1. DISASSEMBLY ...............................................		1-1			(3)	KLV-46W400A ................................................	2-1
1-1. KLV-32W400A ......................................................		1-1			(4)	KLV-52W400A ................................................	2-1
1-1-1. REAR COVER AND STAND ASSY				2-2.	BLOCK DIAGRAM ..............................................		2-2
	REMOVAL ......................................................	1-1			(1)	BG1G Board .....................................................	2-2
1-1-2. SWITCH UNIT AND SIDE JACK BRACKET
	REMOVAL ......................................................	1-2	3.	EXPLODED VIEWS ........................................			3-1
1-1-3. UNDER COVER AND VESA FRAME (TOP)				3-1. KLV-32W400A ......................................................			3-2
	REMOVAL ......................................................	1-3		3-1-1.		REAR COVER AND STAND ASSY .............	3-2
1-1-4.	BG1G BOARD REMOVAL ...........................	1-4		3-1-2.		CHASSIS-1 ......................................................	3-3
1-1-5.	POWER UNIT REMOVAL ............................	1-5		3-1-3.		CHASSIS-2 ......................................................	3-4
1-1-6. SPEAKER AND UNDER BAR REMOVAL . 1-6				3-2. KLV-40W400A ......................................................			3-5
1-1-7. LCD PANEL, H3E BOARD AND H4 BOARD				3-2-1.		REAR COVER AND STAND ASSY .............	3-5
	REMOVAL ......................................................	1-7		3-2-2.		CHASSIS-1 ......................................................	3-6
1-1-8.	WIRING LAYOUT .........................................	1-8		3-2-3.		CHASSIS-2 ......................................................	3-7
1-2. KLV-40W400A ......................................................		1-9		3-3. KLV-46W400A ......................................................			3-8
1-2-1. REAR COVER AND STAND ASSY				3-3-1.		REAR COVER AND STAND ASSY .............	3-8
	REMOVAL ......................................................	1-9		3-3-2.		CHASSIS-1 ......................................................	3-9
1-2-2. AC INLET AND UNDER COVER				3-3-3.		CHASSIS-2 ....................................................	3-10
	REMOVAL ....................................................	1-10		3-4. KLV-52W400A ....................................................			3-11
1-2-3. BG1G BOARD AND IP5 BOARD				3-4-1.		REAR COVER AND STAND ASSY ...........	3-11
	REMOVAL ....................................................	1-11		3-4-2.		CHASSIS-1 ....................................................	3-12
1-2-4.	FRAME REMOVAL .....................................	1-12		3-4-3.		CHASSIS-2 ....................................................	3-13
1-2-5.	SPEAKER (L) REMOVAL ...........................	1-13		3-5.	PACKING MATERIALS ....................................		3-14
1-2-6.	SPEAKER (R) REMOVAL ...........................	1-13		3-5-1.		KLV-32W400A ..............................................	3-14
1-2-7. LCD PANEL, H3E BOARD AND H4 BOARD				3-5-2.		KLV-40W400A ..............................................	3-15
	REMOVAL ....................................................	1-14		3-5-3.		KLV-46W400A ..............................................	3-16
1-2-8.	WIRING LAYOUT .......................................	1-15		3-5-4.		KLV-52W400A ..............................................	3-17
1-3. KLV-46W400A ....................................................		1-16
1-3-1. REAR COVER AND STAND ASSY
	REMOVAL ....................................................	1-16
1-3-2. AC INLET AND UNDER COVER
	REMOVAL ....................................................	1-17
1-3-3. BG1G BOARD AND IP5 BOARD
	REMOVAL ....................................................	1-18
1-3-4.	FRAME REMOVAL .....................................	1-19
1-3-5.	SPEAKER (L) REMOVAL ...........................	1-20
1-3-6.	SPEAKER (R) REMOVAL ...........................	1-20
1-3-7. LCD PANEL, H3E BOARD AND
	H4 BOARD REMOVAL ...............................	1-21
1-3-8.	WIRING LAYOUT .......................................	1-22
1-4. KLV-52W400A ....................................................		1-23
1-4-1. REAR COVER AND STAND ASSY
	REMOVAL ....................................................	1-23
1-4-2. AC INLET AND UNDER COVER
	REMOVAL ....................................................	1-24
1-4-3. D4, D5, G5 AND BG1B BOARDS
	REMOVAL ....................................................	1-25
1-4-4.	FRAME REMOVAL .....................................	1-26
1-4-5.	SPEAKER (L) REMOVAL ...........................	1-27
1-4-6.	SPEAKER (R) ................................................	1-27
1-4-7. LCD PANEL, H3E BOARD AND H4 BOARD
	REMOVAL ....................................................	1-28
1-4-8.	WIRING LAYOUT .......................................	1-29
						KLV-32/40/46/52W400A (GA)	8

SECTION 1

DISASSEMBLY

1-1. KLV-32W400A

1-1-1. REAR COVER AND STAND ASSY REMOVAL

5 Two screws
(+BV 3X12,
TYPE2, IT-3)
3 Seven screws	3 Three screws
(+BVTP2 4X16) 4 One screws	(+BVTP2 4X16)	2 Stand assy
(+PSW M5X8)
	1 Three screws
	(+PSW M5X16)

3 Eight screws (+BVTP2 4X16)

6 Rear cover assy

KLV-32/40/46/52W400A (GA) 1-1

KLV-32W400A

1-1-2. SWITCH UNIT AND SIDE JACK BRACKET REMOVAL

2 Side jack	Claw
bracket assy	1 Switch unit

Claw

KLV-32/40/46/52W400A (GA) 1-2

KLV-32W400A

1-1-3. UNDER COVER AND VESA FRAME (TOP) REMOVAL

4 Two screws
(+PSW M4X8) 3 Under cover	2 Two screws
	(+BVST 3X8)

5 VESA frame

(TOP)

1 Power supply

cord

KLV-32/40/46/52W400A (GA) 1-3

KLV-32W400A

1-1-4. BG1G BOARD REMOVAL

3 One screw	1 Four screws
	(+PSW M3x5)
(+BVST 3X8)	2 Two screws
	(SP 4-4O UNC)
	4 B (J) shield

5 Four screws (+BVST 3X8)

5 Five screws (+BVST 3X8)

8 BG1G board

6 One screw (+BVST 3X8)

q; Main bracket assy

9 Two screws (+BVST 3X8)

7 Harness with connector (LVDS)

KLV-32/40/46/52W400A (GA) 1-4

KLV-32W400A

1-1-5. POWER UNIT REMOVAL

1 One screw

	(+PSW M4X8)
		2 VESA frame
	5 Two screws	(BOTTOM)
		5 Two screws
	(+PSW 3SG)
		(+PSW 3SG)	3 One screw
			(+PSW M4X8)

6 Power unit

4 VESA frame (BOTTOM)

7 G1 brackt

Claw

KLV-32/40/46/52W400A (GA) 1-5

KLV-32W400A

1-1-6. SPEAKER AND UNDER BAR REMOVAL

3 Loudspeaker	1 Two screw
	(+BVTP2 4X16)
	2 Under bar

4 Loudspeaker

KLV-32/40/46/52W400A (GA) 1-6

KLV-32W400A

1-1-7. LCD PANEL, H3E BOARD AND H4 BOARD REMOVAL

	2 Two screws	3 Spine frame (L)assy
	(+PSW M4X8)
			5 Three screws
	1 One screw
			(+PSW M4X8)
	(+BVTP2 4X16)
		7 two screws	6 Spine frame (R)assy
			8 Two screws
		(+PSW M4X8)
			(+BVTP2 4X16)
			7 Two screws
			(+PSW M4X8)
			9 Vesa frame assy
	4 One screw		q; One screw
			(+BVTP 3X12 TYPE2 IT-3)
	(+BVTP2 4X16)
			qa H4 board
			Claw
			qs Light guide
			qd H3E board

qf Claer panel

qh Two screws (+BVTP2 4X16)

qj LCD panel

qg Illumination module

qk Bezel assy

KLV-32/40/46/52W400A (GA) 1-7

KLV-32W400A

1-1-8. WIRING LAYOUT

SWITCH Unit

CN001

Inverter

CN601

Power Unit

CN602

		Power
		cord
	CN401
	H4 board		Illumination
Speaker (L)	CN301	H3E board	module

CN4001	CN4000
CN5501
	CN8001
CN5500
CN3004	BG1G board

CN2001

CN3003

Speaker (R)

KLV-32/40/46/52W400A (GA) 1-8

1-2. KLV-40W400A

1-2-1. REAR COVER AND STAND ASSY REMOVAL

3 Six screws (+BVTP2 4X16)

4 Two screws (+PSW M5X8)

4 Two screws
(+PSW M5X8)
3 Five screws
(+BVTP2 4X16)
3 Two screws	5Two screws
(+BVTP2 4X16)	(+PSW M5X12)

6 Two screws (+BV 3X12, TYPE2, IT-3)

3 Four screws (+BVTP2 4X16)

3 Two screws (+BVTP2 4X16)

1 Three screws (+PSW M5X12)

2 Stand assy

7 Rear cover assy

8 Switch unit

KLV-32/40/46/52W400A (GA) 1-9

KLV-40W400A

1-2-2. AC INLET AND UNDER COVER REMOVAL

2 Under bar (L)

1 Two screws (+BVTP2 4X16)

7 Two screws (+BVST 3X8)

	8 AC inlet bracket	5 Two screws
		(+KTT 3X10(S TYPE))

3 One screw (+BVST 3X8)

6 AC inlet

4 Under cover (L2)

KLV-32/40/46/52W400A (GA) 1-10