Samsung PN50B450B1DXZA Service manual

Volume 4, Issue 11 Consumer Electronics Newsletter
November 2010
Samsung Electronics America
Samsung Tech Talk
Your source for service information
Setting Up C Model Hotel TVs
Inside this issue:
Setting Up C
Model Hotel TVs
1
Another Avenue
for Tech Support
2
Scott Whitman
Manager—Product Support
Whenever the ―SI Vendor‖ parameter in the
interactive menu is changed in a C Model
Hotel TV, the TV needs a hard reboot to
load the new information correctly. To do
this properly, follow these steps:
Samsung Product 4
Support TV: Videos
for You
1. After you have finished changing the
settings in the interactive menu, power
down the TV using the remote control.
Resolving the
Most Common
Home Theater
NDF Issue
6
2. After the TV turns off, unplug the TV
from the AC receptacle.
Hot Tech Tips
8
TV Troubleshooting Test Patterns
Corrected
12
Plasma TV Repair 13
Made Simple, Part
2
Samsung’s
Thanksgiving Dinner
16
3. Leave the set unplugged until the red
LED on the front bezel is completely
extinguished. This should take about
10 to 20 seconds.
4. Plug the TV back in, turn it on, and
then test for proper operation using the
vendor’s remote control.
Remapping Channels
To remap channels using Channel Editor
on the C model Hotel TVs, follow these
steps:
1. Turn the ―Dynamic SI‖ feature ―OFF‖.
―Dynamic SI‖ monitors for the addition
of sub channels and automatically
adds them to the list. To remap, this
feature must be off.
2. In the ―Channel Editor‖ menu, select
the channel or source that you want
changed, and then press the ―Tools‖
button on the Samsung remote control.
3. Select ―Edit Channel Number‖ and
then scroll through the available channels to the one desired and press
―Enter‖.
Trick: To change to the root channel (i.e.
from 5-1 to 5), you must select another
channel number and save, and then repeat and select the final channel number.
Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Another Avenue for Tech Support
Adam Vogel
Product Support
We’ve all been there a time or two, stuck with the TV that we simply don’t know how to fix. We’ve exhausted our efforts
looking through the technical tips and service bulletins, but the TV’s problem simply isn’t there. If you are facing this kind
of predicament, we now have an answer: Tech Support’s new and ever growing ―Repair Assistance‖ portal on GSPN.
Under the new Repair Assistance tab, you will find a ―model code‖ search box as well as 5 ―product category‖ drop down
boxes. Simply enter the model number in question, or use the drop down boxes to make your model selection.
Once the model number is populated in the 5th drop down box, you are then ready to fill out the ―Symptom Code‖ information. For the majority of your repair situations, you will choose option 04-Quality/Trouble in the first drop down box.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Another Avenue for Tech Support
continued
From there, you choose selections from two more drop down filters to pinpoint the problem you are facing.
Symptom Code 2
Symptom Code 3
Once you have all drop down filters correctly filled out, hit the ―Search‖ button at the bottom of the screen. After a few
seconds of loading, a repair scenario should appear, instructing you how to begin repairing the unit.
Please keep in mind, this is a new feature and not all models have been populated with information.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Samsung Product Support TV—Videos for You
Scott Whitman and Adam Vogel
Manager—Product Support, Product Support Specialist
Want to know how to disassemble or troubleshoot the UN9000 LED?
Maybe you don’t know how because you just started as a Samsung servicer. Or maybe you just hired a new technician
and you want the tech to get up to speed fast. In either case, Product Support has started a video how-to library covering
2010 product and has uploaded videos to SPSTV just for you. We started with the UN9000 due to its unusual configuration. Shortly, we will be adding the PDP models. And of course, there are the 2010 TV product basic videos already uploaded that you can view at your convenience.
To Log In
To log in, go to www.samsungsupport.com/spsntv/. On the login screen enter:
Username: samsungvd
Password: samsung83
After you have logged in, this is what the screen will look like:
Viewing Area
Page 4
Past shows you can view.
Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Samsung Product Support TV—Videos for You
continued
If you scroll down, you will see a list of videos that we have recently posted:
We created this library of service and repair videos for you. Log in and view them. They are chock full of information you
can use right now. Check out the videos today.
Also, if there is a Samsung product or a repair issue you would like to see a video on, send us an e-mail at avogel@sea.samsung.com or productsupport@sea.samsung.com.
Note: SPSTV is fully compatible with Internet Explorer only. It is not fully compatible with Firefox. If you use Firefox,
some portions of SPSTV will not work correctly.
Customer Access to SPSTV
Your customers can also access SPSTV for how-to video guides, weekly live-shows, and interactive chat sessions, all
oriented to customer needs and concerns. In fact, SPSTV offers over 150 how-to videos covering topics from setting up
a Samsung TV to syncing a Samsung mobile phone with a laptop. New videos are added weekly.
Customers can access SPSTV at www.samsung.com/spstv.
Important: Do not give customers the samsungsupport address, Username, or
Password. These are for technicians only.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Resolving the Most Common Home Theater NDF Issue
Michael Vigliotti
Product Support
The most common Home Theater, No Defect Found (NDF) issue is when a customer complains that a Home Theater’s
rear speakers (usually wireless) are not working. Most of the time, you can resolve this issue by following these steps:

Complete a Test Tone.

Check the light on the back of the wireless speaker module.

Check the connections of the speakers.

See if the TX card is inserted.

If everything is OK, educate the customer by explaining how wireless rear speakers work.
Run a Test Tone – Run a test tone to find out if the customer’s speakers are connected correctly. If the test tone works
and you hear white noise out of each speaker, then you know the speakers are connected correctly and you can skip
directly to ―educating the customer‖. If the test tone fails, proceed to the next step.
Check the Light – If the rear speakers have no audio during the test tone, check the light on the back of the rear wireless module. If the light is solid BLUE, then you know that the connection between the front receiver and the back speakers is good and you can proceed to the next step. If the light is RED or BLUE AND BLINKING, skip the next step and
check the TX card.
Check Speaker Connections – Only check the connections if the light on the TX Card is blue and you still get no sound
out of the rear speakers when you run a test tone. Some customers think that the wireless speaker system does not
need any wires. This is not true. You need to connect a wire from each rear wireless speaker to the wireless module.
Without this connection, the customer will not hear any sound. If the wireless speakers are not connected to the wireless
module, connect them, then skip the ―Check the TX card‖ step and educate the customer about connecting each wireless speaker to the wireless module.
Check the TX card – The TX card might not be inserted into the back of the HTS main unit. This has to be done on all
models, except for the HT-C75xx which has it built in. If the TX card is inserted and the connections are good, then the
only thing you can do is try to re-sync the main unit to the wireless module. To re-sync, turn off the main unit, and then
use a pin to press the ID set button on the wireless module. While the blue light is blinking, press Mute > 0 > 1 > 3 > 5 >
Power on the remote control, and then wait for the main unit to turn on. If you do not see a solid blue light, repeat this
step 2 to 3 times. In the worst case scenario, you will need to service the unit.
Educate the Customer – This is all you have to do if the test tone completed successfully. Some customers just do not
understand how surround sound works. If you need help explaining surround to customers, just follow these guidelines:
First, find out if the customer is listening to a 2.1, 5.1, or 7.1 audio track. With 2.1, you can set the audio to play 2 ways:
as 2.1 sound from the Front Left, Front Right and Subwoofer, or as simulated surround which uses all the speakers. If
the customer complains that the rear speakers are not working and he is listening to 2.1 audio, explain that he can press
the PLII Mode button and set the HTS to Prologic or Matrix and get simulated surround sound.
With 5.1/7.1 audio, the HTS cannot simulate surround. It can only reproduce what is on the sound track. If the movie has
a lot of background noise, you will hear that noise in the rear speakers. If there is little to no background noise, then only
the front speakers will output audio. Ask the customer to fast forward to a noisy scene such as a crowded room or an
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Resolving the Most Common Home Theater NDF Issue
continued
explosion. Then, have the customer touch the rear speakers and listen closely. If the customer feels vibration or hears
any sound, then this should prove that their Home Theater is working properly.
The easiest way to explain to a customer how surround sound works is to ask the customer to imagine she is the camera
filming the movie. Any sound that happens behind the camera will play through the rear speakers and any sound that
happens in front of the camera will play through the front speakers.
Please Send Us Your Comments!
Something you’d like to see in the Samsung Tech Talk Newsletter? If there a topic/issue we haven’t covered that you’d
like us to write about, LET US KNOW!
Please send your comments to:
training@sea.samsung.com
Page 7
Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Hot Tech Tips
Jorge Tavora
Product Support Manager/Tech Support Hotline/Triage
Model: PN50B450B1DXZA
Symptom: There are vertical lines on the screen
Cure: Call the customer before running the service call and ask the customer to bring up the OSD menu. If the symptom
affects the menu, replace the panel.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Hot Tech Tips
Continued
Model: PN50C450B1DXZA
Symptom: Vertical white bar on the left side of the screen
Cure: Call the customer before running the service call and ask the customer to bring up the OSD menu. If the symptom
affects the menu, replace the panel.
* While at the customer’s home, also reseat all the cables.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Hot Tech Tips
Continued
Model: UN46B6000VFXZA
Symptom: Lower right hand side has a dark shadow.
Cure: Call the customer before running the service call and ask the customer to bring up the OSD menu and run the picture test function. If the symptom appears during the picture test, replace the panel.
Note: The illustration above shows the internal test pattern with the lower right hand side showing a dark shadow.
Samsung Electronics America
85 Challenger Road
Ridgefield Park, NJ 07660
The information in this newsletter is published for experienced repair technicians only and is not intended for use by the public. It does not contain warnings to advise non-technical individuals of possible dangers in attempting to
service a product. Only experienced professional technicians should repair
Phone: 201-229-4251
products powered by electricity. Any attempt to service or repair the product or
products dealt with in this information by anyone else could result in serious
injury or death. Information provided in this bulletin is subject to change or update without notice.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Hot Tech Tips
Continued
Model: UN46B6000VFXZA
Symptom: Half the screen has vertical colored lines
Cure: In this model, the T-CON has two output ICs that control the panel. Replace the T-CON. Before replacing the TCON, reseat the LVDS cable.
Model: UN55C9000ZFXZA
Symptom: There is red smear in sections of the screen.
Cure: The LVDS cable can cause this if it’s not seated correctly. Check the position of the LVDS cable and the contacts.
If seated correctly, replace the LVDS cable.
Consult the Samsung Service Website (GSPN) at http://service.samsungportal.com for the Service Manual and other
information on these products.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
TV Troubleshooting Test Patterns Corrected
Scott Whitman
Manager—Product Support
During the past year, we have been found that various 2010 TV models do not have the correct test patterns listed in
their service menus. To ensure you have the correct test pattern for a given TV, download the TV’s latest firmware if the
TV does not have the latest firmware installed. The error is rectified in all the latest firmware versions for all models .
What does this mean to you in the field? For PDP and 120hz/240hz products, this means simplified troubleshooting. If
you are not already aware of the test patterns, now is the time to get acquainted with them. They are a valuable tool for
isolating board failures between the main board, LVDS cable, T-con/FRC, and panel.
See the flowchart below for a basic overview of the video processing flow and how it relates to the test patterns. Note
that the flowchart is accurate for PDP TVs except where it mentions FRC test patterns. For PDP TVs, use Logic test patterns instead.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Plasma TV Repair Made Simple, Part 2
Charles Russo
Trainer—RTSC
In the first installment of this series last month, we began examining the basic operation of and troubleshooting for Samsung Plasma TVs.
In particular, we examined the VITAL SIGNS—the Vs, Va, Vsc, and Ve voltages—and their importance.
The Vital Sign voltages can be taken in less than 5 minutes and not only greatly assist in the immediate repair diagnosis
but also prevent future failures. (Redo!)
These voltages are specifically set for a given panel and are so important that their values are printed on a sticker inside
the back of each panel. See the example label below.
NTSC
Va
55
NTSC/PAL
Vsc
Vs
Ve
-190
212
100
Rev. 2.0
Even though the 2010 models have additional failsafe circuitry that shuts down the start up sequence in approximately 3
seconds if an over voltage or under voltage/high current condition occurs (short), you still have plenty of time to check
the voltages. Simply hook up your volt meter before you turn on the Plasma TV and be ready to take your readings.
Let’s continue to look at some of these voltages and what they do.
Vs: Sustain Voltage
Discussed last issue, the Vs Sustain Voltage is generated by the SMPS (Switching Mode Power Supply) and operates at
approx 200 volts (in the example label above, 212V). It is used by both the Y-Board and X-Board assemblies to help
produce the sustain drive signal to the plasma cells of the panel. Without the Vs voltage, the drive signal cannot exist
and the cells cannot light, leading to a dead looking panel. If the Vs is missing, causing an under voltage/high current
condition (typically shorted), 2010 models will shut down within 3 seconds.
If this voltage is misadjusted too high or too low, specks or dots appear causing a cell misfiring condition commonly
known as a ―Diffusion‖ condition. Setting this voltage properly can eliminate this condition.
Va: Address Voltage
Also discussed last issue, the Va Address Voltage is generated from the SMPS and supplies approximately 60 Volts
(54V in the example label) to the Logic Buffer Boards, commonly known as the Address Boards, located in 2010 models
on the bottom of the panel. If this voltage is missing, low, or high, the Address Boards will not operate properly. If this
voltage is incorrect, cell misfiring and/or noise such as vertical bars or vertical segments may appear, since addressing
occurs vertically up the screen.
Now let’s look at Vsc and Ve.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Plasma TV Repair Made Simple, Part 2
continued
Vsc: Scan Voltage
The Vsc Scan Voltage is generated at the Y Board Assembly and is produced after the Y Board receives the Vs Supply
Voltage from the SMPS (Switching Mode Power Supply Board). It is approximately -190 Volts (-190V in the example label) and is combined with the Scan Signal from the Logic Board by the FETs on the Y Board.
The Scan driving signal is then fed to the Scan ICs located on the Y Buffer Board(s) of the panel and is responsible for
scanning left to right, across the screen, and top to bottom, in a Progressive Scan, that is, one horizontal line at a time.
Repair Scenario 1
Symptom: The panel will not turn on. The TV shuts down after a 3 second interval.
Troubleshooting: Measuring the ―Vital Signs‖ shows Vs is OK, but there is no Vsc Voltage or a rise in voltage.
Repair: Replace the defective Y Board. Also replace the Y-Buffer Board(s) since the Scan ICs may also have been affected.
Note: A visual inspection of the Scan ICs on the Y Buffer Boards (Scan Board(s)) is important and necessary. Physical
damage to any of the Scan ICs can be a quick confirmation of failure. Failures, however, can occur without any physical
problems being observed. If any of the ICs fail, replace all Y Buffer Boards (usually 1 or 2 assemblies) and the Y-Board.
Repair Scenario 2
Symptom: The panel will not turn on. The TV shuts down after a 3 second interval.
Troubleshooting: Measuring the ―Vital Signs‖ reveals no Vsc and no Vs.
Repair: Since Vsc relies on the Vs feed from the Power Supply, first troubleshoot the no Vs condition. To begin, test Vs
for a short to the chassis ground. The short can come from the Y-Board or X-Board. Remove the Power Supply Vs feed
to determine which board has the short. Replace the defective Y or X Board. If no short exists, test the power supply with
the connectors removed.
Note: Also verify the Logic Board is sending an active high signal to the SMPS to turn on Vs.
Ve: Erase Voltage
The Ve Erase Voltage is generated at the X Board and is derived from the Vs voltage from the Power Supply. The Ve
voltage, approximately 100 volts, (95V on the example label) is primarily used to assist the Y in erasing previously activated cells and neutralizing the erasure before the next scan.
Repair Scenario 1
Symptom: The TV turns on, but the video has continuous image ghosting or retention from previous frames.
Troubleshooting: Measuring the ―Vital Signs‖ reveals no Ve.
Repair: Replace the defective X-Board.
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Volume 4, Issue 11 Consumer Electronics Newsletter
Samsung Tech Talk
Plasma TV Repair Made Simple, part 2
continued
Repair Scenario 2
Symptom: The TV turns on, but the picture is very dark.
Troubleshooting: All ―Vital Signs‖ measure OK.
Repair: Place the TV in service mode and activate the Logic Test Patterns. If the video is still dark, replace the defective
X Drive. If the video restores to normal when you use the Logic Test Patterns, replace the defective Main Board.
This concludes ―Checking the Vital Signs‖. Look for Plasma TV Repair Made Simple, Part 3 in the next issue of Tech Talk!
Above: The Samsung PN58C6500TF 58 inch Plasma TV
Page 15
Samsu ng El ect ronics Am eric a
Samsung Electronics America
SAMSUNG’S Thanksgiving Dinner
Directions: Unscramble the words below and use the letters circled to answer the final question below . The solution is
on the following page.
1.KTRUEY
2.GAVRY
3.KNPMUPI EPI
4.ERRNRCIAESB
5.NORC
Take the circled letters from above and unscramble them to solve the final question.
Where to go for 24/7 training support?
S
Page 16
L
Samsu ng El ect ronics Am eric a
Samsung Electronics America
SAMSUNG’S Thanksgiving Dinner—Solution
1.KTRUEY
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2.GAVRY
G R
3.KNPMUPI EPI
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4.ERRNRCIAESB
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5.NORC
Take the circled letters from above and unscramble them to solve the final question.
Where to go for 24/7 training support?
S
P
S
T
Samsung Electronics America
85 Challenger Road
Ridgefield Park, NJ 07660
Phone: 201-229-4251
V
O
N
L
I
The information in this bulletin is published for experienced repair technicians
only and is not intended for use by the public. It does not contain warnings to
advise non-technical individuals of possible dangers in attempting to service a
product. Only experienced professional technicians should repair products
powered by electricity. Any attempt to service or repair the product or products
dealt with in this information by anyone else could result in serious injury or
death. Information provided in this bulletin is subject to change or update without notice.
Page 17