Samsung PN43D490A1DXZA Schematic
PN43D490A1DXZA
Fast Track Troubleshooting Manual - Rev 1/10/12
Vs Va Vsc Ve
Voltages
Buffer Y
SMPS
Y Main
Spkr R
Logic
Main PCB
Buffer
HELP : 888-751-4086; 866-894-0637 FE)
GSPN
http://gspn3.samsungcsportal.com
PLUS ONE
http://my.plus1solutions.net/clientPortals/samsung
HOT TIPS
If the set has "grainy" video, verify the sources first. If
they are good, check the OSD. if that is fine, narrow the
inputs if possible. Digital noise will show up as artifacts
that customers will describe as "Grainy" and can occur
on the HDMI inputs. If this only occurs on the HDMI
inputs, and you know the sources are good, replace the
main board. Also check external HDMI Cable is < 40 feet.
V
Main PCB
Buffer
X Main
Buffer X
Spkr L
FIRMWARE
T-MST4AUSC.exe(24.9MB)
via GSPN also available on
Samsung.com web site.
Important to check for new S.W.
updates.
SERVICE BULLETINS
2011 PDP Option Byte Table
ASC20110630001
Quick Parts: Verify any parts changes
before Ordering.
1
Fast Track Troubleshooting Manual PN43D490A1DXZA
CN802 (SMPS) ↔ CN2001 (Logic Board)
CN801 (SMPS) ↔ CN201 (Main Board)
Pin No.
(SMPS)
1 PS-ON 1
2 STBY 2 A5V_PW
3 GND 3 DGND
4 D15V 4
5 GND 5 DGND
6 GND 6 DGND
Pin No.
(SMPS)
7 D5.3V 7 B5V_PW
Signal
(SMPS)
Signal
(SMPS)
Pin No.
(Main
Board)
Pin No.
(Main
Board)
Signal
(Main
Board)
SW_POW
ER
B15VS_P
W
Signal
(Main
Board)
Power On Sequence
1. STBY 5V (Pin 2 CN801)
2. PS_ON (approx 3.3V – 0V) (Pin 1 CN801)
3. Low Voltages On 5V & 15V (All “B” Signals
listed – to Main Board)
4. VS_ ON (approx 0V – 3.3V) (Pin 6 CN802)
(Sending Vs to Y & X Boards, & Va to Logic
Buffer Boards.
5. TV on with Boot Logo appearing.
Pin No.
(SMPS)
1 D5.3V 1 5.3V
2 D5.3V 2 5.3V
3 GND 3 GND
4 VS-SIGNAL 4 GND
5 PS-ON 5 PS_ON
6 VS-ON 6 VS_ON
Signal
(SMPS)
Pin No.
(Logic Board)
Signal (Logic
Board)
8 D5.3V 8 B5V_PW
9 GND 9 DGND
10 D15V 10 B15V_PW
11 D15V 11 B15V_PW
12 D5.3V 12 B5V_PW
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