DCDC

D7102Rectifier

IC7301

8Start Vcc

5

T7301

Q7301

6VCC

PC7304

Q7201

L=ON

D7301,7302

R7301-7306

16V

2

PC7302

feedback

4

2

1,2

5VS

IC 7400

PC7303

IC7501

EN

VH

VCC

OUT

FB

D7502

C7511

PFCIC7201 24V

D7501

C7502

Q7502

Q7511

P4

789

24V

5

123

7

16V

P2

VCC

P

5V

PFC ON

Q7200

A BC

D

G

S

H

Q

T7202D7200C7301

Q7510

Q7501

REG

Q7512IC7502

8

PowerSW

I

V

Y

Q7304

H=ON

( TNPA5583 )

8

7

TV_SUB_ON

B: TV_SUB_ON=H PFC on B=380V TV_SUB_ON=L PFC off B=140V/310V (depend on the AC voltage)

T*-L37ET5

Power Supply Block Diagram : TX-L37ET5

Output TV_SUB_ON signal

Peaks read the IC8900

A

STB5V output

16V/24 output

< Plug In > < Power On >

Stop TV_SUB_ON signal

PPower Switching circuit (IC7301/T7301)start working

PFC circuit (IC7201/T7201or7202 ) start working

PFC circuit (IC7201/T7201or7202 ) stop

Power Switching circuit (IC7301/T7301) keeps working.STB5V keeps output.

P

P

P

P

P

A

A

Output TV_SUB_ON signalA

P

P

P

A

Power onSW/

Remote

Output PANEL_VCC_ON2 signal

Output BL_ON_ON signalA

Power onPower off

Simple Power On Sequence

Power Switching circuit (IC7301/T7301)keeps working.STB5V keeps output.

PFC circuit (IC7201/T7201or7202 ) start working

16V/24 output

4 Informe de Koma: Humo por IC7301 dañadoPanamex

January .2012

➊ Problema, Descripcion, Acontecimiento ❸ Accion inmediatas/ Mercado / Otros.

❷ Causa / estudio de causa de origen ❹ Recurrence prevention / Horizontal dev.

Problema: . Después de 1 hora de instalado el televisor repentinamente aparece humo y se apaga.

Donde :

Stock in Panamex: 1020 units: Was released after all confirmation tests. Market action: Replace P board complete and return at factory

Causa: Sobre carga eléctrica debido a:- Enhance the ESD activities 12/01/2012 a) Increase the time inspection from 1 to 5 min b) Test devices increase. QC section

Modelo : TC-L32C4X, S/ N: MXDA11208435

Cuando :

Dec 31

Ocurrio Recibido

Jan 9th

Reportado

Jan 9th

Cuando fue ensamblado :Assy Linea Dec 1srtPCB Linea Nov 30th

Before AfterStatic Field Meter Static Field Meter

+Static Event Meter

1 min by station 5 min by station

It can detectDischarges

It can detectConstant fields

Activity Date ResultPart List Confirmation 09/01/2012 OKOn/off Test 48 hrs 5 sets 11/01/2012 OKOn/off Test 70 V 5 sets 23/01/2012 OK

Current Lot quality assurance

Identify root causeSent to Malasya Market sample 10/01/2012 Already recivedRevise Process defect 10/01/2012 3 cases No smokeRevise Market defect 16/01/2012 1 case more No smokeRevise Another Companies 11/01/2012 Checo 14 cases, process

16/01/2012 PAVCA 1 case, processReproduce Phenomenon Continous We can't not reproduce

Preventive action in Panamex ProcessEnhancement ESD control 10/01/2010 4 findings already OK

No hubo incendio, lesiones humanas o daños materiales

ESD daño parcial mente Panamex controlRendimiento incorrecto del IC Hacer control

AB

Horizontal : To Include Audio factory

By Panamex Production & QC :

By R&D : We wait reply Origen de la Causa: Bajo estudio por PAVCKM

1 8

5

7

internal configuration IC7301

2

34

1 8

5

7

internal configuration IC7301

2

34

Sensor de Corriente C) Daily ESD revision by Production section C) Daily ESD revision by Production section