LL-T155A (serv.man2). LLT155A - Sharp Monitor Service Manual (repair manual)

ll-t155a (serv.man2) service manual
Model
LL-T155A (serv.man2)
Pages
20
Size
450 KB
Type
PDF
Document
Service Manual
Brand
Device
Monitor / LLT155A
File
ll-t155a-sm2.pdf
Date

Read Sharp LL-T155A (serv.man2) Service Manual online

LCD COLOR MONITOR
MODEL
LL-T155A
    NOTES TO SERVICE PERSONNEL................................................................................. 1
    CAUTIONS IN SERVICING ............................................................................................... 1
CHAPTER 1: OUTLINE OF THE PRODUCT AND NOMENCLATURE ................................. 4
CHAPTER 2: REPLACING LAMPS ....................................................................................... 6
CHAPTER 3: CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS ................ 8
CHAPTER 4: TROUBLESHOOTING....................................................................................12
CHAPTER 5: TRIMING AND PROCESSING LEAD WIRES ................................................14
CHAPTER 6: BLOCK DIAGRAM/UNIT TERMINALS ...........................................................15
CHAPTER 7: APPAEARANCE AND DISASSEMBLY DRAWINGS OF MECHANISMS ......17
CHAPTER 8: PACKAGING METHOD ..................................................................................18
CONTENTS
Parts marked with "
" is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SHARP CORPORATION
   SERVICE MANUAL
Notes to service personnel
·
Pictorials
·
This service manual and the product use a variety of pictorials in order to assure the safety of repair operations and of the product
repaired.
·
If those pictorials are ignored in repairing, the following troubles might occur:
·
Understand the meaning of those pictorials and read this manual carefully before trying to repair the product.
DANDER:
Failure to follow the instructions in the message might cause a serious accident or death.
WARNING:
Failure to follow the instructions in the message might cause a serious accident or death.
CAUTION:
Failure to follow the instructions in the message may cause personal injury or damage to the asset.
·
Meaning of symbols
·
Pictorial example
 symbols mean the necessity of using caution.
Electrical shock
Hot surface
 symbols mean actions which are prohibited.
 symbols mean actions to be required.
Don’t touch
Remove power plug
Cautions in servicing
Locations which require a special caution carry safety instructions using labels and stamps on the cabinet, chassis and components.
When servicing, observe the instructions on such labels and stamps.
Electrical shock and burn
1. Prior to servicing, make sure to remove the power supply plug.
Electrical shock
2. Some parts inside the unit have a high voltage. Use caution to avoid an electrical shock accident when servicing an energized
unit.
Use specified parts
3. The component parts of this unit have safety characteristics such as flame resistance and dielectric strength.
·
Use replacement parts which have the same characteristics as those of the components parts used for this unit.
·
In particular, component parts marked with 
 in the circuit drawing parts list are important for maintaining the safety of the
product. Make sure to use specified replacement parts.
Reinstall component parts in their original locations and return wires which have been rerouted for servicing
purposes to their original positions.
4. Some component parts use insulating materials such as tubes or tape for safety purposes, or are mounted, a bit floated, on the
printed wiring board.
·
When rerouting inside wiring or clamping the wires, use caution not to bring the wires too close to heating or high-voltage parts.
·
Make sure to return inside wiring to their original locations.
Check for safety after servicing.
5. After finishing servicing, check whether the screws, parts, wires which have been removed for servicing are reinstalled properly.
In addition, check to see if you have not deteriorated parts around the part you serviced, and also check for insulation between
each of the attachment plug terminals and the external metal section.
·
Cautions to be taken when making adjustments
 WARNING
 CAUTION
1. Use caution to avoid shorts due to the probe of an
oscilloscope or jigs and do not touch high-voltage
circuits directly.
(There is fear of causing a fire or your getting an
electric short accident)
2. Use caution not to touch heating parts like the
radiating plate directly.
(You could get a burn.)
·
Cautions to be taken when replacing electrical parts
 WARNING
 CAUTION
1. Parts marked with 
 are important for
maintaining the safety of the product. Use
specified parts when replacement of such parts is
required. (There is fear of giving off smoke,
catching fire, or your getting an electric shock)
2. Use caution not to damage the LCD unit when
handling it.
·
Cautions to be taken when soldering
 WARNING
1. Do not try to solder when the parts are energized or
the unit is turned on.
(There is fear of causing fire or your getting an
electric shock.)
2. Use caution not to damage peripheral parts and
lead wires (e.g., burning peeling of coating).
(There is fear of causing a fire or your getting an
electric shock accident.)
 CAUTION
1. Use caution not to touch a soldering iron directly.
(You could get a burn.)
2. Make sure the radiating plate or heating parts are
cool enough not to get a burn before touching such
a part.
(You could get a burn.)
3. Use caution not to have the wrong direction when
installing parts, if they need the installation of a
correct direction.
(There is fear of causing a fire.)
4. Use caution to avoid shorts due to an improperly
cut length of parts’ lead legs after soldering and
exercise care not to cut your finger with the edge of
cut surface.
(There is fear of causing a fire or your getting an
injury.
5. Some parts need to be installed at a specified
intervals or by a specified method for safety
purposes (they may be a bit floated from the board
for dissipating heat.). They must be reinstalled to
the original conditions.
(There is fear of causing a fire or your getting an
electrical shock accident.)
6. Use caution to solder in a correct manner so that
areas other than the part you want to solder are
contaminated with solder, like a solder ball or
bridge.
·
Cautions to be taken when disassembling or reassembling the unit
 WARNING
1. Prior to servicing, make sure to remove the power
supply plug.
(You could get an electrical shock accident.)
2. Use caution not to touch the inside of the product
with a wet hand or foot.
(You could get an electrical shock accident.)
3. Before servicing, make sure you know the locations
of high-voltage parts.
(You could get an electrical shock accident.)
4. Do not work on an unstable place or with the stand
put upright. In particular, fix the cabinet before
replacing PWBs or fan.
(There is fear of your getting an injury due to
tipping or falling.
 CAUTION
1. When disassembling or reassembling the unit,
make sure to put the front cabinet side (LCD unit
side) downward and carry out work using caution
not to get your fingers caught.
(Since the LCD unit side is heavier, there is fear of
your getting an injury due to tipping or falling.)
2. Use caution to avoid a reaction due to your
applying too much force when removing or
reinstalling screws.
(You could get an injury.)
3. When disassembling the unit, use caution not to get
a burn because radiating plates and areas around
lamps on the PWB are hot immediately after
unplugging.
(You could get a burn.)
4. Use caution not to get you fingers caught in the
stand pole, between the stand and angles or under
the cabinet.
(You could get an injury.)
5. Pay attention to burrs or edges of the resin (cabinet
and PWBs) and metal (chassis and others) parts.
(You could cut your finger with them.)
6. Use caution to the deformation of the grounding
spring or the displacement of the ferrite core.
(There is fear of causing radio noises to other
equipment.)
·
Cautions to be taken when replacing fluorescent lamp
 CAUTION
1. Make sure the fluorescent lamp is cool enough not
to get a burn before you are going to touch the
lamp or areas around it.
(You could get a burn.)
2. Use caution to avoid a reaction due to your
applying too much force when removing the
connector.
(You could get an injury.)
3. Use caution not to break the fluorescent lamp when
handling it.
(You could get an injury.)
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Download Sharp LL-T155A (serv.man2) Service Manual (Repair Manual)

Here you can read online and download Sharp LL-T155A (serv.man2) Service Manual in PDF. LL-T155A (serv.man2) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LL-T155A (serv.man2) Monitor. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.