HANNspree ST42DMSB User manual

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Overview:
The purpose of this manual is to guide Nexicore technicians through the proper procedures for
proper replacement of all major components of the unit.
Table of Contents:
1. Stand Removal
2. Wall Mount Removal
3. Back Cover Removal
4. Power Supply Unit Replacement
5. Main Board Replacement
6. Keyboard Replacement
7. LED/IR Board Replacement
Required Tools:
Non-marking Pry Tool
Phillips Head Screwdriver
Anti-Static Wrist Strap
Kapton Tape or Electrical Tape
Hannspree (ST42DMSB) 42 inch LCD TV Service Manual
servicing the Hannspree 42 inch LCD televisions. Utilizing this manual will assist technicians with
Hannspree 42" LCD TV model number ST42DMSB
Ant-Static Mat
3/16" Nut Driver

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1. Stand Removal
•To ensure no damage to the front LCD Panel, gently place unit face down on padded
anti-static mat with the stand hanging over the edge of the work surface.
(Figure 1)
(Figure 2)
Hannspree 42 inch LCD Television Service Manual
•Remove the 6 screws that secure the stand to the unit.

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•Slide stand from unit by gently pulling it towards you.
(Figure 3)
Hannspree 42 inch LCD Television Service Manual

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2. Wall Mounting Bracket Removal
•To ensure no damage to the front LCD Panel, gently place unit face down on padded
anti-static mat.
•Remove the 4 screws that secure the wall mounting bracket (wall mounting bracket not
pictured here).
(Figure 4)
•Gently remove the bracket from the unit.
Hannspree 42 inch LCD Television Service Manual

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3. Back Cover Removal
•To ensure no damage to the front LCD Panel, gently place unit face down on padded
anti-static mat.
(Figure 5)
Hannspree 42 inch LCD Television Service Manual
•Remove the 10 screws from the perimeter of the back cover.
The screw located in the bottom right corner may be covered by a piece of tape.

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(Figure 6)
The keyboard is attached to the back cover on this model.
Caution: when removing the back cover you will need to unplug the keyboard.
•Next, remove the remaining 1 screw from the center of the input jack area.
•Remove the cable and carefully lift the back cover from the unit.

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4. Power Supply Unit Replacement
•Remove Back Cover.
(Figure 7)
Hannspree 42 inch LCD Television Service Manual
•Disconnect the3cables attached to the Power Supply Unit (PSU).

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•Figure 8 shows all cables removed from the PSU.
(Figure 8)
Hannspree42inch LCD Television Service Manual

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(Figure 9)
•Gently lift the PSU from the mount.
•To reinstall the PSU place unit on mount ensuring screw holes line up properly.
•Reconnect all cables.
Hannspree42inch LCD Television Service Manual
•Remove the 4screws securing the PSU board to the mount.
•Reinstall the 4screws.

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5.Main Board Replacement
•Remove Back Cover.
•Disconnect all cables from Main Board.
(Figure 10)
Hannspree42inch LCD Television Service Manual
TheLVDScablehassecuringtapeholdingitinplace.Youmustpeelthetapebacktoexpose
the connector, once exposed push in on the two black tabs and gently remove the LVDS cable

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•Figure 11 shows all cables disconnected from the Main Board.
(Figure 11)
Hannspree42inch LCD Television Service Manual

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(Figure 12)
•Remove the 6 screws from the HDMI jacks then remove the other 8 screws in
screws attaching the jack plate. Once the jack plate is removed the 6 screws attaching
the power supply can be removed.
the VGA input jack. The plastic trim piece can now be removed exposing the 3 remaining
the component input area. A 3/16" nut driver is needed to remove the 2 screws in he remove the two screws from the
Hannspree42inch LCD Television Service Manual

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Hannspree 42 inch LCD Television Service Manual

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Hannspree42inch LCD Television Service Manual
•The main board removed from the set.

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Hannspree42inch LCD Television Service Manual
•To reinstall the Main Board Use 6 screws to secure the mainboardinplaceensuringthescrew
holeslineupcorrectly.Reconnectallthecablesintheirproperlocationthenremountthejackplate
usingthesamescrewsthatwereremovedearlier.
FrameRateBoardRemoval
Remove the 5 wires connected to the board. 3 of the cables require tabs to be pushed in to
remove them. Carefully push the tabs in and remove the cables. Remove the 4 screws mounting
the board in place. Reverse the steps to reinstall the frame rate board.

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6. Keyboard Replacement
•Remove Back Cover.
(Figure 17)
•To reinstall the Keyboard, place the cover over the Keyboard and secure the 2 inner screws.
Place the Keyboard in slot and secure the 2 outer screws then reconnect the cable.
Hannspree42inch LCD Television Service Manual
•The keyboard is mounted inside the back cover.
•Remove 2 outer screws and carefully lift the Keyboard from the back cover.

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7. LED/IR Board Replacement
•Remove the Back Cover.
•Remove the 2 screws securing the LED/IR Board to the unit. Gently lift the board up then
disconnect the cable.
Hannspree42inch LCD Television Service Manual

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(Image 19)
Hannspree42inch LCD Television Service Manual
Removethetwoscrewssecuringthecircuitboardtotheplasticmount.
thebackcoveroftheTV.
•To reinstall reversetheabovestepsthenscrewthemountedboardbackinto

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Hannspree42inch LCD Television Service Manual

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Hannspree 42 inch LCD Television Service Manual