PLASMA TV - SAMSUNG PS42E7SX/XEC PDP-TELEVISION (P_Europe_42SD) TROUBLESHOOTING
* A fixed screen
can cause permanent damage to the TV Braun tube: Braun, PDP and LCD TVs can all be damaged.
When a still image is displayed in a sequence, this can leave stains or
after-images due to the characteristics of the panel. However, the DLP TV has the advantage that no
stains or after-images are left on the screen.
The DLP TV has mirror pixels on the DMD panel that project the beam onto
the screen, in which the mirror is a digital representation of 0s and 1s,
leaving no trace of light. The mirror returns to a blank state so that no
stains or after-images are left.
* Length of DVI
Cable / PC RGB Cable: A too long DVI cable may cause a malfunction or
degradation of the visual quality due to an attenuation of the signal. There is no
recommendation for the cable length at present.
In general, although a cable length of up to 5 meters should work,
please check if video is
* properly
displayed on the screen after connecting. If you think the length of the cable
is longer than for normal use, check the visual quality of the video on the
screen and shorten the length, if necessary.
This also applies to the PC RGB
(D-Sub) cable. When the length of the cable is longer than for normal use,
video may not be displayed on the screen. In this case, shorten the cable length.
* When a
digitally distributed TV user receives HD-rated broadcasts: The digital distributed TV (Ready Technique)
can render HD sources as HD-rated.
* However, you
need to install a set-top box for this purpose. The digital TV alone cannot
render HD broadcasting as HD-rated. Install the formal set-top box for HD
broadcasts.
* When a digital
distributed TV user selects normal size (4:3) to receive SD-rated digital broadcasts: The digitally distributed TV (Ready
Technique) renders any broadcasting service as SD-rated. However, when connected to a set-top box, the
digital TV renders HD broadcasts as HD-rated and renders SD as SD-rated. The
screen size is scaled to 4:3.
* When a
digitally built-in TV user receives SD (air) broadcasting: The
digitally integrated TV
("built-in" type) renders SD broadcasting as SD-rated. This can be
understood easily. Even a high-resolution TV cannot improve a
low resolution picture into high quality.
In contrast, an SD-rated TV cannot represent HD broadcasting as HD
because the resolution of the TV is lower than the original.
* When selecting a
picture size of 4:3 in connection with a computer or a multimedia device: The representation capability of SD or
HD-rated depend entirely on the TV set. The HD TV can render HD broadcasting as
HD-rated only when it receives HD sources.
In the meantime, the HD TV renders SD as SD-rated when it receives SD
sources. The picture size has nothing to
do with the resolution; TV models like SVP-XXL3HD or SVP-XXL6HD have a size
adjustment feature to 16:9, 4:3, Panorama, Zoom1, Zoom2 and Auto Wide. This is
about the aspect ratio of the top and bottom boundaries to the overall screen
and users can select their preference.
SD/HD broadcasts and the TV's
display capability are related.
1. A digital broadcast should be
transmitted in wide screen (an aspect ratio of 16:9) HD. If the broadcasting
station converts a conventional program created in normal screen (aspect ratio
of 4:3) into a digital signal and broadcasts the signal, the left and right of
the picture will not be displayed. This
symptom also appears in other manufacturer's TV's. The three appliance
companies are trying to resolve the problem through the Ministry of Information
and Communication.
> When watching an SD (normal)
broadcast through a Digital (Wide) TV (480P normal broadcast)
> When watching an SD (normal)
broadcast through a Digital Ready (Wide) TV (Using a set-top-box)
> When watching an analog (normal)
broadcast through a wide TV. (When
watching a broadcast after changing the aspect ratio of the TV from 16:9 (wide
screen) to 4:3)
2. When
watching a DVD title or
video tape in wide screen (21:9) through a wide (16:9) TV, watching
video from
a computer or game console by selecting
the aspect ratio to 4:3, or watching video from a DVD, VCR, computer or
game
console through a wide TV by selecting the aspect ratio to normal (4:3)
or wide
(21:9), the left and right, or top and bottom of the picture will not be
displayed. This symptom appears in other manufacturer's
TV's. The three appliance companies are trying to resolve the problem
through the
Ministry of Information and Communication.
Changing the Order of the Picture
Size for 16:9 Display Devices.
1. When you want to change the
picture size in PIP 'ON', you must turn the PIP off before changing the size. However, you can change the main picture size
even in PIP ON for products with no restrictions.
2. When the picture size is not
Normal (4:3 for 4:3 display devices, 16:9 for 16:9 display devices) and you
turn PIP on, the picture size is changed to Normal. However, you can turn PIP
on without changing the picture size for products with no restrictions.
3. In the OSD notation for the
picture size, 16:9 is represented as "Wide" instead of
"16:9" for devices other than with 16:9 displays. Ex: For LCD 15:9 devices, "Wide" is
displayed on the OSD instead of "16:9".
4. The picture size can be
changed even in the blue screen. However, the picture size should be controlled
by the product specifications if the change is impossible due to hardware restrictions.
TROUBLESHOOTING - SAMSUNG PS42E7SX _ PLASMA TV 
Symptom:
* The LEDs on the front panel do
not work when connecting the power cord.
**The SMPS relay does not work
when connecting the power cord.
*** The power of the unit seems
to be out of order.
Major Checklist
The SMPS relay or the LEDs on the
front panel do not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is out of order. In this case,
check the following:
* Check the internal cable
connection status inside the unit.
** Check the fuses of each part.
*** Check the output voltage of SMPS.
**** Replace the Main Board.
When the unit is repeatedly
turned on and off
In general, the SMPS relay
repeatedly turns on and off by the protection function due to a defect on a
board connected to the SMPS.
* Disconnect all cables from the
SMPS, operate the SMPS alone and check if the SMPS works properly and if each
voltage output is correct.
** If the symptom continues even
when SMPS is operated alone, replace the SMPS.
If the symptom is not observed
when operating the SMPS alone, find any defective ASSYs by connecting the
cables one by one.
When separating and connecting
the cables such as CN809 of the Main SMPS, CN1, CN2, CN3, CN4 and CN5 of DC-DC SMPS,
CN of the X Main Board, and CN of the Y Main Board, a spark may be generated by
the electric charge of the high capacity capacitor. Therefore, wait some time
after separating the power cord from the unit.
NO PICTURE-AUDIO NORMAL - SAMSUNG PS42E7SX PLASMA TV
This may happen when the Main
Board is normal but the X, Y Main Board, Logic Board, or Y Buffer Board is out
of order.
The output voltage of the Main
SMPS or the DC-DC SMPS is out of order.
This may happen when the LVDS
cable connecting the Main Board and the Logic Board is disconnected.
When separating and connecting
the cables such as CN809 of the Main SMPS, CN1, CN2, CN3, CN4 and CN5 of the
DC-DC SMPS, CN of the X Main Board, and CN of the Y Main Board, a spark may be
generated by the electric charge of the high capacity capacitor. Therefore,
wait some time after separ ating the power cord from the unit.
NO SOUND
NO VIDEO
PLASMA TV - TROUBLESHOOTING - SAMSUNG
No Display (Operating Voltage
exist, but an doesn't exist on Screen)
No Display
is related with Y-MAIN, X-MAIN, Logic Main and so on.
Shows you how to check the
boards, and the following pages show you how to find the defective board.
Abnormal Display is related with Y-MAIN, X-MAIN, Logic Main
and so on. Shows you how to check the
boards, and the following pages show you how to find the defective board.
SUSTAIN OPEN & SUSTAIN SHORT CONDITIONS
Address Open, Short(some vertical
lines don't exist on screen) Address Open and Short is related with Logic Main, Logic
Buffer, FFC, TCP film and so on.
Shows you how to check the
boards, and the following pages show you how to find the defective board.
42 INCH PLASMA TV - SAMSUNG - TROUBLESHOOTING PROCEDURE BY ASS'Y
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