KLV-19T400A, KLV-19T400G, KLV-19T400W - Sony TV Service Manual (repair manual)

1

-01

2008/7

_ _

1st Issue

2

-02

2008/11

Corr-1

1. Revise Model & Destination details for

BT Mount (Service) 

(Page 23, 26)

2. Revise Model & Destination details for Cushion

and Individual Carton 

(Page  26)

3

-03

2009/1

Corr-2

Assy, Bezel Part number Change 

(Page 25)

4

-04

2009/

6

Corr-

3               R

emote Commander Part number Change 

MODEL

KLV-19T400A
KLV-19T400A/H
KLV-19T400G
KLV-19T400W

PART NO. : 

9-872-999-04

MODEL

COMMANDER

DEST.

KLV-19T400A 

RM-GA013 E, GE, 

India

,

ME, 

New Zealand,

Thailand, South Africa

KLV-19T400A/H

RM-GA013

E, ME,Thailand

(Gun-Metalic Silver)

KLV-19T400G 

RM-GA013 E, 

India

,

 ME,

 Thailand

KLV-19T400W 

RM-GA013 

E, 

GE

, 

India, ME, 

South Africa

MODEL

COMMANDER

DEST.

RM-GA013

KLV-19T400G

KLV-19T400W

KLV-19T400A

– 2 –

1-1. Caution Handling of LCD Panel ..................................... 3
1-2. Safety Check Out ............................................................. 3
1-3. Leakage Test .................................................................... 3
1-4. WARNING ! .................................................................... 3
1-5. Lead Free Information ..................................................... 4

2-1. Overview of Control Buttons .......................................... 5
2-2. LED Display Specification .............................................. 5
2-3. LED Display Control ....................................................... 5
2-4. LED Pattern ..................................................................... 5
2-5. Viewing the Service Diagnosis Display .......................... 5
2-6. Standby LED Error Display ............................................ 6

3-1. 3D Woofer and Stand Assy Removel

(KLV-19T400W) .............................................................. 7

3-2. Stand Assy Removel (KLV-19T400A/T400G) ............... 7
3-3. RearCover Removal ......................................................... 7
3-4. GT Board Removal .......................................................... 7
3-5. BT, KT and J Boards Removal ........................................ 7
3-6. Main Bracket Removal ................................................. 7
3-7. HT Board Speaker Removal ............................................ 8
3-8. LCD Panel and Bezel Assy Removal .............................. 8

4-1-1. Wire Dressing overview for 19T400A

Non-CISPR model ...................................................... 9

4-1-2

Wire Dressing overview for 19T400A
CISPR model .............................................................. 9

4-1-3

Wire Dressing overview for 19T400W model ........... 9

4-1-4

Wire Dressing overview for 19T400G model ............ 9

4-1-5

LVDS Harness and SP Connector Assy
4P Dressing (NON CISPR) ...................................... 10

4-1-6

LVDS Harness and Connector Assy
4P Dressing (CISPR) ................................................ 10

4-1-7

Connector Assy 1P and Inverter
Harness Dressing ...................................................... 10

4-1-7

Lead Assy, Earth Dressing ....................................... 11

4-1-8

Wire Harness Dressing ............................................. 11

4-1-8

Wire Harness Dressing ............................................. 12

4-1-9

Connector Assy 4P, 11P, SP Conn Assy 4P
and 5P* Dressing ...................................................... 12

4-1-10 SP Conn Assy 4P and LVDS Harness Dressing ...... 13
4-1-11 Connector Assy 10P Dressing .................................. 13
4-1-13 AC Power Cord Wire Dressing (Non-CISPR) ......... 14
4-1-14 AC Power Cord Wire Dressing (CISPR) ................. 14

5-1. Accessing Diagnostic Menu .......................................... 15
5-2. Viewing the Service Mode Display .............................. 15
5-3. Control Keys Via Remote Commander ......................... 15
5-4. Adjustments Method ..................................................... 15
5-5. Table 1 ............................................................................ 17
5-6. Board & Panel Replacement ......................................... 17

6-1. Block Diagram ............................................................... 18
6-2. Connector Diagram ....................................................... 18
6-3. Circuit Board Location .................................................. 19
6-4. Schematic Diagram ....................................................... 19
6-5. Printed Wiring Boards ................................................... 19
6-6. Semiconductor ............................................................... 19

7-1. Rear Cabinet and Stand Assy ........................................ 20
7-2. Rear Cabinet, 3D Woofer and Stand Assy Woofer ....... 21
7-3. Power Cord, AC Cord Holder, C

lamp. ......................... 22

7-4. Chassis-1 ........................................................................ 23
7-5. Speaker ........................................................................... 24
7-6. Bezel Assy and LCD Panel ........................................... 25

.............................................. 26

– 3 –

1-1. Caution Handling of LCD Panel
When installing the LCD Panel, make sure you are grounded
with a wrist band.
When installing 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 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 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 elec-
tronic circuit (C-MOS).

1-2. 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 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, "metallized"
knobs, screws and all other exposed metal parts for AC
leakage. Check leakage test as described next.

1-3. 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 0.5mA
(500 microamperes). Leakage current can be measured by
any one of the three methods:-
1. A commercial leakage tester such as the SIMPSON 229 or
RCA WT-540A. Follow the manufacturers instructions to use
those 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 0.75V 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 1.)

Ω

µ

Figure 1. AC voltmeter to check AC leakage

SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY SHADING AND MARK 

!

ON THE EXPLODED VIEWS 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.