TV-KIT-010 Instructions Magnavox HVG Repair - 7621

Transcription

Last Updated Monday, 29 October 2012 14:51
Magnavox Projection TV Repair Instructions
This guide will help you repair your Magnavox TV if it has
any of the following symptoms.
Power light and audio work but TV does not have video.
This repair kit is known to work on Magnavox TV sets with the following Chassis/Model
Numbers.
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DPTV305 , DPTV305F , DPTV310 , DPTV315 , DPTV330 , DPTV330F , DPTV335 , DPTV340 ,
DPTV345, MAG01
Model Numbers
( 43PP9202/17 43PP920217 43PP9202/17F 43PP9202/84 43PP920217F 43PP920284
43PP920201 43PP920284F 46PP9302/17 46PP930217 46PP930201 46PP930217F
46PP930284 46PP930284F 46PP9302H17 50PP9202/01 50PP9202/17 50PP9202/84
50PP9202/84F 50PP920201 50PP920217 50PP920284 50PP920284F 50PP920217F
51MP392H/17 51MP3964H/17 51PP9303H/17 51PP9363H17 51PW9303/17F 51PW936317F
55PP9352/17 50PP920217F 51MP392H17 51MP3964H17 51PP9303H17 51PP9363H17
51PW930317F 55PP935217 55PP935201 55PP9363H17 55PP9502/84 55PP950284
55PP950201 55PP950217 55PW936317F 55PW9383/17F 55RW9515/35 60PP9202/17
55PW938317F 55RW951535 60PP920217 60PP920201 60PP920217F 60PP9352/17
60PP935217 60PP935201 60PP9363H17 60PP938317F 60PP9502/17 60PP950217
60PP950201 60PW936317F 60PW938317F 43PP9202/17 43PP9202/17F 43PP9202/84
43PP920217 43PP920217F 43PP920284 43PP920201 43PP920284F 46PP9302/17
46PP930217 46PP930201 46PP930217F 46PP930284 46PP930284F 46PP9302H17
50PP9202/01 50PP9202/17 50PP9202/84 50PP9202/84F 50PP920217F 51PP9303H/17
51PP9363H17 51PW9303/17F 50PP920201 50PP920217 50PP920284 50PP920284F
51PP9303H17 51PW930317F 51PW936317F 55PP9352/17 55PP935217 55PP935201
55PP9363H17 55PP9502/84 55PP950284 55PP950201 55PP950217 55PW936317F
55PW9383/17F 55RW9515/35 60PP9202/17 55PW938317F 55RW951535 60PP920217
60PP920201 60PP920217F 60PP9352/17 60PP935217 60PP935201 60PP9363H17
60PP938317F 60PP9502/17 60PP950217 60PP950201 60PW936317F )
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Icons used in this document
This icon is used to indicate tips or tricks that will make the repair
go smoothly
This icon is used to point out important items such as safety
precautions
This icon is used to highlight additional notes.
Disclaimer
The procedures described in this document require access to potentially dangerous voltages,
proximity to the CRT and its implosion risk, and other possible dangers lurking inside a
television set. We will not be responsible for personal injury resulting from attempting these
repairs nor damage to the equipment that may result from lack of soldering experience or
inadequate de-soldering or soldering equipment.
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Please read this guide completely at least once before you attempt to fix your TV. You may also
want to print the document out. To do so click the "print" icon at the top of this article.
Unplug Power and all Cables
TV sets can hold a charge for a long time and can shock you even while unplugged if you are
not careful. It is strongly advised that you unplug your TV set from the wall at least 3 days
before attempting the fix. This will give the set some time to discharge some of the stored
electricity. Do not plug your TV back in until the repairs are completed.
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Remove all Cable TV, Speaker, Audio/Video Cables from rear of set.
Remove
Using
rear
panel.
theRear
proper
Access
tools Panel
remove all the rear cover screws along the top, sides, and bottom of the
5 / 17
Loosen wire ties so that you are able to lift the board up without any of the wires getting pulled.
Flyback ( High Voltage Generator) Removal
The part that you will need to locate and replace is called the High Voltage Generator. You can
purchase the HVG from the following sources.
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www.PartStore.com
www.VanceBaldwin.com
The Philips part number is "312226832865'. Price is around $120.00 with shipping.
Update: 3/17/2009 - We have been informed by several customers that the HVG is now sold out
at Partstore and VanceBaldwin. The part is on back order with no estimated arrival date.
Another option is to contact Tri State Modules - Or PTS/Modulus.
They will rebuild your LSB board and replace the failed HVG.
If you decide to send them your board for repair you won't have to remvoe the HVG from the
board.
PTS Corp/Modulus
http://www.moduslink.com/
Website: http://www.tristatemodule.com/Phone : 800.203.7484 (ext. 210, ext. 203)
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Email Address: info@tristatemodule.com
CAUTION: You must be real carefull when working around the High Voltage Generator.
Locate the flyback as shown in the picture below.
Pull the rubber caps up on the high voltage wires.
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broken
Slowly
first
on
The
the
because
problem
wires
pull
pieces
upuntil
with
ofon
get
the
they
the
this
stuck
yellow
first
method
pop
in High
clips.
the
out.is
old
Voltage
This
sometimes
An
flyback.
alternative
is normal.
Wirethe
asmethod
Just
clips
shown
break
increase
isintothe
as
pop
picture.
the
they
out
amount
are
the
The
being
yellow
of
wires
upward
removed
plastic
are very
pull
clips
and
force
tight
first.
theat
If you place your other hand on the flyback it will provide more leverage.
Generator.
and
the
Once
anything.
Repeat
stored
drain
the
done
the
wire
the
voltages
you
above
high
iscan
removed
steps
voltage
in
safely
thefor
CRT
touch
from
handle
the tubes
remaining
the
it to
the
CRT/wires.
the
being
wires.
metal
RED
discharged
rack
You
wires
as
may
that
shown
to or
ground.
aremay
in
stillthe
not
connected
This
photo.
seewill
a This
spark.
not
to damage
the
willThe
High
ground
spark
Volage
it is
out
Youhelp
will
mayinsure
want to
that
touch
the voltages
the wiresare
to the
drained
metaland
frame
theeach
wirestime
are before
safe to you
handle.
work on the set. This
Onceofyou
rest
the have
cables
safely
fromdischarged
the circuit board.
the HGV voltage from the CRT wires you can now remove the
Remove
you
knowallwhere
the cables
to put on
them
theback!
flyback board! Make sure you label them with a marker so that
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On the board you will find several screws that will need to be removed also.
Note: One screw is hidden on the side of the flyback. Remove it also.
Once all the cables and screws are removed you are now ready to pop the circuit board out. To
do this push the black plastic clips back shown in the photo below. The clips are located on the
right hand side of the board. If the board will not move freely you have missed as screw. Check
again!
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Caution:
time.
hell
board.
the
with
smaller
of
aDo
resistor
aThis
shock.
not
The
capacitors.
will
touch
large
ifhelp
To
youavoid
the
green
to
like.
bottom
remind
Only
them
This
capacitors
the
will
of
you
just
large
the
discharge
circle
not
shown
board
green
to the
touch
where
in
the
ones
area
the
this
voltages.
with
they
as
photo
area.
shown
aare
permanent
below
Note:
located.
below.
can
Youstore
Otherwise
You
marker
don'tcan
high
need
onalso
voltages
you
the
to short
worry
bottom
may for
get
them
about
of
aone
long
the
out
Once the board is removed place it on a table, workbench, etc.
Desolder High Voltage Generator
Note: We highly recommend using a desoldering iron like the one
shown below. You can purchase one from Radio Shack for under
fifteen dollars.
1.
2.
3.
4.
5.
Plug the desoldering pump in...Let it warm up.
Position the circuit board so that you can get to the items that need to be desoldered.
Press the pump bulb - and hold it in.
Place it on the 1st pin to be desoldered - when the solder melts release the pump bulb.
The solder will get sucked into the desolderng iron.
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6. Place the pump over a piece of paper and press the pump bulb to blow out the solder
onto the paper.
7. Repeat the steps above
Using the desoldering iron shown above slowly remove the solder from the High Voltage
Generator pins on the underside of the board as shown in the photo below.
After you have removed the solder you will need to straighten the metal clamps to remove the
HVG. You may also have to use your soldering iron to melt any solder that may have been used
to weld the clamps to the board.
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Install New High Voltage Generator
After you have removed the old HVG it is now time to solder the new one into the circuit board.
Place the new HVG into the circuit board in the exact location as the old one.
Bend the holding pins so that the HVG stays in place during soldering.
Soldering Instructions
In order to do the repair you will need to own a soldering iron and rosin core solder. If you don't
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have these tools already you can pick them up at your local Radio Shack store for around
10.00.
We highly recommend the 15, 25, or 30 watt soldering irons. All three will work perfectly.
Safety precautions
• Never touch the element or tip of the soldering iron. • They are very hot (about 400°C) and will give you a nasty burn. • Always return the soldering iron to its stand when not in use. • Never put it down on your workbench, even for a moment! • Work in a well-ventilated area.
Preparing the soldering iron
• Plug the soldering iron in.
• Wait a few minutes for the soldering iron to warm up. • You can check if it is ready by trying to melt a little solder on the tip. • Wipe the tip of the iron on a damp sponge. • This will clean the tip. • Melt a little solder on the tip of the iron. • This is called 'tinning' and it will help the heat to flow from the iron's tip to the joint. It only
needs to be done when you plug in the iron, and occasionally while soldering if you need to
wipe the tip clean on the sponge. 14 / 17
Soldering
• Hold the soldering iron near the base of the handle. • Touch the soldering iron onto the area that needs to be soldered.
• Make sure it touches both the item to be soldered and the board. Hold the tip there for a few
seconds .
• Feed a little solder onto the joint at the tip of the iron. • It should flow smoothly onto the lead volcano shape. Apply the solder to the joint, not the iron. • Remove the solder, then the iron, while keeping the joint still. • Allow the joint a few seconds to cool before you move on to the next one. • Inspect the joint closely.
Reassemble the TV
Reinstall the board in the reverse order that you removed it. Make sure that any plugs, wires,
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etc you disconnected are back into their proper connector. Make sure you double check every
plug and connector by hand, not by sight, for loose or shifted connections. After you have
checked all the cables power on the TV set and check to see if the video now works.
Leave the rear cover off the TV so that you can monitor it while it powers on. If you see any
sparks, glowing resistors, smoke, etc unplug the TV immediately.
We value your feedback. Please let us know if the above kit and instuctions helped resolve
your TV problem. Also, any feedback on how we can improve our kits, instuctions, or website
is always appreciated.
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TV-KIT-010 Instructions Magnavox HVG Repair - 7621

Transcription

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