Sanyo FVM3982 Manual de usuario

This guide is divided into 4 sections/pages depending on type of defect:

page 1)No Green LED Power Light.(LED never turns“ON”)

page 2)Green LED Light is “ON”, but Backlights are not “ON”,or only turn“ON & then OFF”.

page 3)Green LED Light is “ON”,and Backlights are “ON”,but there is no video/OSD.

page 4)Green LED Light turns “ON”, but turns “OFF”within 10 seconds.

Please select the section/page that matches your defect and follow the flow chart.

These models & chassis versions are in this guide:

P39842-00

P39842-01

PLEASE KEEP THIS GUIDE.

IT WILL NOT BE PROVIDED FOR EVERY REPAIR.

t[email protected]

SANYO

TROUBLESHOOTING GUIDE

2012 MODELS

P39842-00 / P39842-01

2012/04/02

2012-4A

Repair Flow Chart:Trouble Condition

Green Power LED does not turn on. The TV is dead.

Green Power LED:

Does not turn ON.

The TV is dead.

On analog signal board:

Is the “5VSTB” voltage supplied?

(see TABLE*1.0)

On digital signal board:

Is the “5V_STBY” voltage on

“K5A Pin 3 or Pin 4”?

Analog board is not working.

Replace “analog board”.

Unplug(CN2) connector on

power board. On Power board:

Is the “5VSTB” voltage supplied?

(see TABLE*2.0)

Power board is not working.

Replace “Power board”.

Unplug(K16A) and(K16B) connector

between digital unit and analog unit

Is the “5V_STBY” voltage supplied?

(see TABLE*3.0)

Analog board is not working.

Replace “analog board”.

Replace “digital board”.

While pushing the “power key sw”

is the 2.9V from “key sw2”

supplied to “K16A Pin17”?

Analog board was broken.

Replace “analog board”.

Digital board is not working.

Replace “digital board”.

No:0v

Yes:5v

No:0v

Yes:5v

No:0v

Yes

No voltage(0v)at K16A Pin17 or 2.9V always present.

(see TABLE*4.0)

(see TABLE*5.0)

Page 1

(TABLE *1.0)Analog board:5VSTB Test Points

39" Models 5VSTB on Analog board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Analog K17 Pin4 or Pin5 5V

(TABLE *2.0) Power board:5VSTB Test Points

39" Models 5VSTB on Power board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Power CN2 Pin4 or Pin5 5V

(TABLE *3.0)Digital board:5V_STBY Test Points

39" Models 5V_STBY on Analog board Conrmation Voltage

P39842-00 Z6SE

PW39842-01 Z6SF

Analog K16A Pin3 or Pin4 5V

(TABLE *4.0)Digital board:5VSTB Test Points

39" Models 5VSTB on Digital board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Digital K5A Pin3 or Pin4 5V

(TABLE *5.0) Analog board: Key_SW2 Test Points

39" Models Key_SW2 on Analog board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Analog K16A Pin17 2.9V

Repair Flow Chart:Trouble Condition

Green Power is on,but LCD backlights are not on.

Backlights do not turn on, or only turn on and back off.

Power LED turns ON,

but LCD backlight is not ON

or only turned ON and then

back OFF.

On analog signal board:

Is the “BL_SW” voltage (5V)

Supplied from “K17 Pin13”?

On Power board:

Is the 0V supplied from “CN3 Pin10”

during LED on time?

Panel is broken.

Replace “Panel”.

On digital board:

Is 3.3V supplied to”K5A Pin19” ?

Digit board is not working.

Replace “digital board”.

On Power board:

Is the 50V sine wave (RMS) supplied from “CN3Pin 1/2”

Power board is not working.

Replace “Power board”.

Confirm wire harness connection

between analog board &Power board

and between Power board and panel .

Panel is not working

Replace panel.

Replace “analog board and

wire harness”.

No:0V

Yes:5V

Yes:3.3V

Yes:0V

No:over 0.1V

No:0V

Yes:+/-50V sine wave(RMS)

Page2

See TABLE *1.0

See TABLE *3.0

See TABLE *4.0

“ CN3

Pin 4/5”

See TABLE *2.0

and 50V sine wave (RMS) supplied

Page 2

(TABLE *1.0)Analog board: BL_SW Test Points

39" Models BL_SW on Analog board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Analog K17 Pin13 5V

(TABLE *2.0) Digital board: 3.3V Test Points

39" Models 3.3V on Digital board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Digital K5A Pin19 3.3V

(TABLE *3.0)Analog board: BL-SW Test Points

39" Models 0V on Power board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Power CN3 Pin10 0V

(TABLE *4.0) Power board: +/- 50V Sine wave (RMS)Test Points

39" Models +/- 50V Sine wave (RMS) on Power board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

+50V Power CN3 Pin1 or Pin2

-50V Power CN3 Pin4 or Pin5

+ 50V Sine wave (RMS)

- 50V Sine wave (RMS)

Repair Flow Chart:Trouble Condition

Green Power LED and LCD backlights are ON,but no video or OSD.

LCD backlights are ON,

but TV has NO VIDEO or OSD.

On analog board:

Is the 12V supplied from “K17 Pin 8/9”?

On digital board:

Is power 12V supllied from “K5A Pin2”?

Replace“Power board” and

“Wire harness”.

On digital board:

Is power 12V to TCON supplied

from“K5LV Pin29/33/37” ?

Analog board is not working.

Replace “analog board”.

Is LVDS clock outputed?

Confirm LVDS cable connection

and check for video OSD again.

T.Cnt.Board or LCD panel is not working.

1st:Replace“T.Cnt.Board&LVDS Cable”.

If T.Cnt.board&LVDS cable do not correct

problem,then 2nd:Replace“LCD Panel”.

Digital board is not working.

Replace “digital board”.

Digit board is not working.

Replace “digital board”.

If the clock output is OK,the digital board is

normally OK,but can not be 100% sure.If

the T Cont Board &LVDS do not the correct

problem,please try the digital before ordering

a panel.

Ｎｏ：０Ｖ

Ｙｅｓ

Ｎｏ：０Ｖ

Ｙｅｓ：１２Ｖ

Ｎｏ：０Ｖ

Ｎｏ：０Ｖ　ｏｒ　１．１Ｖｃｏｎｓｔａｎｔ

Ｙｅｓ

Ｙｅｓ：１２Ｖ

See TABLE *1.0

See TABLE *2.0

See TABLE *4.0

See TABLE *3.0

Page 3

(TABLE *1.0)Analog board: 12V Test Points

39" Models 12V on Analog board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Analog K17 Pin8 or Pin9 12V

(TABLE *2.0) Digital board: 12V Test Points

39" Models 12V on Digital board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Digital K5A Pin2 12V

(TABLE *3.0) Digital board: 12V Test Points

39" Models 12V on Digital board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Digital K5LV Pin29/33/37 12V

(TABLE*4.0)Main board:"LVDS Clock"Test Points

39" Models LVDS Clock on Digital board

P39842-00 Z6SE

P39842-01 Z6SF

K5LV Pin26 clock+

K5LV Pin28 clock-

Note:The bandwidth of the oscilloscope and probe must be at least 100MHZ or higher to check if the clock pulse exists.

Repair Flow Chart:Trouble Condition

Power LED turns OFF within 10 sec of power ON.

Power LED turns OFF within

10 sec of power ON.

On analog board:

Is 3.3V supplied to“K17 Pin1”during

LED ON time?

On digital board:

Is 3.3V supllied to “K5A Pin29”?

Unplug cable from digital board

to T.Cnt.board is symptom

changed?

Analog board is not working.

Replace “analog board”.

On power board:

Is the 12V supplied from “CN2 Pin8/9 ”

during LED ON time?

Digital board is not working.

Analog board may also not be working.

Replace “digital board and analog board”.

T Con board is not working.

Digital board may also not be working.

Replace “T Con board&digital board”.

Power board is not working.

Replace “Power board.”

Ｎｏ：０Ｖ

Ｙｅｓ：３．３Ｖ

Ｎｏ：０Ｖ

Ｙｅｓ

Ｎｏ

Digital board is not working.

Replace “digital board”.

Ｙｅｓ：３．３Ｖ

Ｎｏ：０Ｖ

Page4

See TABLE *1.0

See TABLE *2.0

See TABLE *3.0

Page 4

(TABLE *1.0)Analog board: 3.3V Test Points

39" Models 3.3V on Analog board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Analog K17 Pin1 3.3V

(TABLE *2.0) Digital board: 3.3V Test Points

39" Models 3.3V on Digital board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Digital K5A Pin29 3.3V

(TABLE *3.0)Power board: 12V Test Points

39" Models 12V on Power board Conrmation Voltage

P39842-00 Z6SE

P39842-01 Z6SF

Power CN2 Pin8 or pin9 12V

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