Page 1
PN51D450A2DXZA Fast Track Troubleshooting Manual
Y Buffer
Y Main
Logic
HELP: 1-888-751-4086 (Tech Support)
GSPN
http://service.samsungportal.com/EP/web/
portal/jsp/EP_Default1.jsp
PLUS ONE
http://my.plus1solutions.net/clientPortals/s
amsung
HOT TIPS
-Power On Problems: (p g. 3)
-Video Problems: (pg. 4)
SMPS
Buffer F Buffer E Spkr
Latest Firmware:
None – As of 4/19/12
X Main
Spkr
Main
Func.
Service Bulletins:
2011 PDP Option Byte Table ASC20110630001 .
Quick Parts List:
Version Parts No Short Description
ALL BN44-00443A SMPS
N101 BN96-16513A Logic Main PCB
N102 BN96-16513A Logic Main PCB
ALL BN96-16514A Buffer E
ALL BN96-16515A Buffer F
ALL BN96-16516A X Main
N101 BN96-16517A Y Main
N102 BN96-16517A Y Main
ALL BN96-16518A Buffer X
N101 BN96-16519A Y Main Scan
N102 BN96-16519A Y Main Scan
ALL BN96-16730B Function & IR PCB
ALL BN96-19471A Main PCB
N411 BN96-20511A Y Main
N411 BN96-20512A Buffer Y
N411 BN96-20513A Logic Main PCB
N101 BN96-16471A Panel
N102 BN96-17357A Panel
N411 BN96-20477A Panel
ALL BN96-16783A Rear Cover
ALL BN96-16786A Stand Guide
N101 BN96-16789A Stand Base
N102 BN96-16789A Stand Base
ALL BN96-16789C Stand Base
ALL BN96-17870A Front Cover
ALL 3903-000552 Power Cord
N102 BN40-00140B Tuner
N101 BN40-00140B
ALL BN96-13325F LVDS Cable
ALL BN96-18071C Speaker
ALL AA59-00506A Remote
Tuner
Page 2
PN51D450A2DXZA
Y-BUFFER
Fast Track Troubleshooting Manual
SMPS
YDRIVE
SPEAKER
E-BUFFER
Power On Sequence:
1. STBY 5V (CN801, #2, 5v)
2. PS_ON (CN801, #1, 3.3v-0v)
3. VS_ ON (CN802, #6, 0-3.3v)
4. Panel should illuminate briefly
LOGIC
F-BUFFER
MAIN
BOARD
XDRIVE
FUNCTION
Page 3
PN51D450A2DXZA
Fast Track Troubleshooting Manual
Power Supply Trouble Shooting Notes:
2010/2011 models
Will not be run with the “X” or “Y” main 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 cor r ect voltage briefly
before shut- ting down.(You have enough time t o chec k key
voltages)
CAUTION: Do not reconnect any connectors to SMPS or Y/X Boards
until power has been turned off long enough for Vs to drop below 10V
or damage will occur to X or Y Boards.
SMPS Over Current Protection
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!
Sample
“VITAL SIGNS”
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-Board & X-Board
supply feeds one at a time.
Turn Power On and Test SMPS with shorted connector r emov ed for
correct Vs voltage verification. (It may only come up briefly but to full
level). Be careful not to reconnect power connectors until Vs falls below
10V.
If Va is low or missing, disconnect power connectors to Address Boards
and Check to see if SMPS Supply is restored. (Note Va feed normally
passes through the Y-Driv e t o t he Addr ess Boards (Logic Buffer Boards).
If Vsc is low or missing and Vs is OK, the failure is with the Y-Board
.
since the Y-Board generates the Vsc voltage from the supplied Vs.
If Ve is low or missing and Vs is OK, the failure is with the X-Board since the
Ve is generated by the X-Board from the supplied Vs. (Please note: In some
rare cases the Ve is generated by the Y-Board fed to the X-Board.)
Other SMPS Voltages:
Check Low Voltage feeds to the Main Board and other supplied Assemblies.
3
Page 4
PN51D450A2DXZA
Fast Track Troubleshooting Manual
TROUBLESHOOTING VIDEO PROBL E M S
1. Verify Video Operation
a) Customer Picture Test (if available)
b) “Display”
c) Substitute with known good Source
(external DVD or Signal Generator
(If display is OK source is suspected)
3. Determine cause
a) If Logic pattern is NG; Logic
board, Logic buffers or
Panel are suspect.
b) If FBE patterns is NG and
Logic is OK; Main or LVDS
cable are suspect.
If both are OK it is likely a
c)
source issue.
2. Using Test Patterns in Service Mode
- ENTERING SER VICE MODE –
Customer Remote: Service Remote:
)
1. Power off 1. Power On
2. Mute, 182, Power 2. Info, Test
4
Page 5
2011 PDP Signal Path for
Genoa-P
Main Board
A
R
Inputs
A/V
HDMI
PC
USB
Etc.
Boot
Logo
S
E
N
A
L
Genoa
-P
OSD
Customer
Picture Test
Troubleshooting
LVDS
CABLE
Logic
Board
X
M
A
I
N
X
B
U
F
F
Logic Buffer
Boards
Y
M
Y
B
Logic
(
A
I
N
U
F
F
PNXXD8000 Sample)
Page 6
PN51D450A2DXZA
Fast Track T roubleshooting Manual
ALIGNMENTS & OPTION BYTES :
1. Check/Adj. VS, VA, VE, & VSC according to Panel Label
and Diffusion test. (see bulletins for any special notes
before making changes)
2. Check/Set Option Bytes:
- ENTER SERVICE MODE -
a) Customer Remote: Power off; M ute, 182, Power On
b) Service Remote: Power On; Info, Test
Model
Code
Side Label
N101 51DHHcD PD450 ALPS - - other P-S-C-BK
N102 51DHHcD PD450 ALPS - - other P-S-C-BK
N303 51DHHcD PD450 ALPS - - other P-S-C-BK
N304 51DHHcD PD450 ALPS - - other P-S-C-BK
I105 51DHHcD PD450 ALPS - - other P-S-C-BK
I406 51DHHcD PD450 ALPS - - other P-S-C-BK
I107 51DHHcD PD450 ALPS - - other P-S-C-BK
I408 51DHHcD PD450 ALPS - - other P-S-C-BK
PN51D450A2DXZA
Type Model Tuner
Option
Light
Effect
Ch Table Country Front Color
DIFFUSION TEST/ADJ. (cell miss-firing, older
units)
- Allow the unit to warm up 15 to 20 minutes
- Access the Burn Protect Sig . Pattern i n Cust .
Menu.
-Adj ust the Vs volts until screen errors are gone
in
both dark and bright areas.
- Adjust the Vs volts within +/- 10V on the panel
label.
SPECIAL NOTES:
See bulletin “Red Dots” for correction/
adjustments for this model.
6
Loading...