Samsung PN43E450A1FXZA Schematic

PN43E450A1FXZA

FIRMWARE

6/5/12

PL51E450A1FXZP / PN43E440A2FXZA /

PN43E450A1FXZA / PN43E450A1FXZC /

PN51E440A2FXZA / PN51E450A1FXZA /
PN51E450A1FXZC

Version: 1011.1

Avail on GSPN or Samsung,Com

Always check for latest updates

SERVICE BULLETINS

-None listed as of 6/5/12

Quick Parts: Verify before Ordering

HELP : 888-751-4086; 866-894-0637 FE)

GSPN

http://gspn3.samsungcsportal.com

PLUS ONE

http://my.plus1solutions.net/clientPortals/sam
sung

HOT TIPS

-New 2012 Model… always check for latest

bulletins and firmware updates.

-New combined X/Y Main Board

Y-Buffer

X/Y

Main

Speaker

Fast Track Troubleshooting Manual – Rev 6/5/12

Vs Va Vsc Ve
Volts Label

SMPS

X-Buffer

Logic

Main

Speaker

Function

1

PN43E450A1FXZA

Fast Track Troubleshooting Manual

E450 Power On Sequence

CN804 (SMPS) – CN4005

SMPS

SMPS

Main

X-Buffer

CN801

Main

X-Buffer

To

Logic

Board

3

E450 Supply Adjustments

SMPS Adj.

X/Y Main Adj.

Adjustment locations may slightly vary with size/version

4

Fast Track Troubleshooting Manual

Note: Some TVs may just have PC Pads
instead of pins on Logic Test Jig. Simply connect to the 3 & 4 pads.

Power Supply Trouble Shooting Notes:

2010/2011/2012 models

Will not be run when the “X“ or “Y” or “Y/X” Main are
disconnected. The SMPS will shut down immediately. However if a
meter is first connected to the test point when power is applied it
will read the correct voltage briefly before shutting down.(You have
enough time to check key voltages!)

CAUTION: Do not reconnect any connectors to SMPS or Y/X Board(s)

until power has been turned off long enough for Vs to drop below
10V or damage will occur to X/ Y Board(s).

. VITAL SIGNS check Vs, Va, Vsc & Ve

When troubleshooting, It’s very important to first check Vs, Va, Vsc

& Ve

If Vs is missing (0V), disconnect power and check for short. Use ohm
meter to measure resistance while disconnecting Y/X-Board supply
feed.
Turn Power On and Test SMPS with short connector removed for
correct Vs voltage verification. (It may only come up briefly but to full
level). Again be careful not to reconnect Power Connectors until Vs
falls below 10V.

If Va is low or missing, disconnect Supply Feed to Logic Buffer Boards
and check to see if SMPS Supply is restored. .

If Vsc is low or missing and Vs was OK, the failure is with the Y/X-

Board since the Y-Board section generates the Vsc voltage from the

Vs supplied by the SMPS.

If Ve is low or missing and Vs is OK, the failure is with the Y/X-Board
since the Ve is generated by the X-Board section from the Vs
supplied by the SMPS

Other SMPS Voltages:
Check Low Voltage feeds to the Main Board and other supplied
Assemblies.

Over Current Protection

For the SMPS Power Supply... If a short circuit occurs on either the
VS or VA voltage lines, the SMPS stops operating, but should not
fail. When the short circuit is removed from the source line, the
Power Supply will operate normally again. Many SMPS Supplies

are replaced needlessly!

5

 Standby A3.3V

on Function
Connector, Pin

3.

 All Pins should

read 3.3V
before
commands.

 Press, at Key 1,

Pin 6. 3.3V to

Function Control Troubleshooting

0.0V DC

 Left, Right, Up,

Down at

Key 2, Pin 7.

Check specific

voltages on

chart.

6

Fast Track Troubleshooting Manual

TROUBLESHOOTING VIDEO
PROBLEMS

1. Verify Video Operation:

A. Customer Picture Test
B. “Display”
C. If display & Customer Picture
Test are OK source is suspected
D. Substitute with known good
source and cabling.

2. Using Test Patterns in

M-STAR

Test Patterns

M-STAR

NOTE: Y/X MAIN

BOARD (E490/450)

Are Combined

Service Mode:

Customer Remote

A. Power off
B. Mute, 182, Power

Factory Remote:

A. Power On
B. Info, Test

3. Verify M-STAR Patterns

4. Verify Logic Patterns

If Logic Patterns are OK and M-

Star are noisy, replace the
defective LVDS Cable or Main
Board.

If M-Star and Logic Patterns are

both noisy check for specific

on screen noise error to

determine failure. (next slide)

NOTE: Y/X MAIN

BOARD (E490/450)

Are Combined

M-STAR

Models Sample

7

ON SCREEN FAILURE EXAMPLES:
NOTE: X/Y MAIN Combined.

Fast Track Troubleshooting Manual

ALIGNMENTS:

1. Check/Adj. VS, VA, VE, & VSC according to Panel Label

and Diffusion test. (see bulletins for any special notes
before making changes)

DIFFUSION TEST/ADJ. (cell miss-firing)

- Allow the unit to warm up 15 to 20 minutes

- Access the Burn Protect Sig. Pattern in Cust. Menu.

-Adjust the Vs volts until screen errors are gone in

both dark and bright areas.

-Adjust the Vs volts within +/- 10V on the panel label.

-NOTE: Diffusion may appear with aging panels.

New panels with Diffusion consult bulletins and/or report
problem.

2. Check/Set Option Bytes:
Verify with latest table update info as well.

51 DHHcD

PE450

8