DOWNLOAD Sharp DX-AT50H (serv.man6) Service Manual ↓ Size: 62.68 KB | Pages: 3 in PDF or view online for FREE

Model
DX-AT50H (serv.man6)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
62.68 KB
Type
PDF
Document
Service Manual / Specification
Brand
Device
DVD / Standard notes for servicing
File
dx-at50h-sm6.pdf
Date

Sharp DX-AT50H (serv.man6) Service Manual / Specification ▷ View online

– 7 –
DX-AT50H
Circuit Board Indications
a. The output pin of the 3 pin Regulator ICs is indicated as
shown.
Top View
Out
In
Bottom View
Input
b. For other ICs, pin 1 and every fifth pin are indicated as
shown.
5
10
Pin 1
c. The 1st pin of every male connector is indicated as
shown.
Pin 1
Instructions for Connectors
1. When you connect or disconnect the FFC (Flexible Foil
Connector) cable, be sure to first disconnect the AC cord.
2. FFC (Flexible Foil Connector) cable should be inserted
parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
How to Remove / Install Flat Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:
(1) Prepare the hot-air flat pack-IC desoldering machine, then
apply hot air to the Flat Pack-IC (about 5 to 6 seconds).
(Fig. S-1-1)
Fig. S-1-1
(2) Remove the flat pack-IC with tweezers while applying the
hot air.
(3) Bottom of the flat pack-IC is fixed with glue to the CBA;
when removing entire flat pack-IC, first apply soldering iron
to center of the flat pack-IC and heat up. Then remove (glue
will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA using tweezers. (Fig.
S-1-6)
Caution:
1. Do not supply hot air to the chip parts around the flat pack-
IC for over 6 seconds because damage  to the chip parts
may occur. Put masking tape around the flat pack-IC to
protect other parts from damage. (Fig. S-1-2)
2. The flat pack-IC on the CBA is affixed with glue, so be careful
not to break or damage the foil of each pin or the solder lands
under the IC when removing it.
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking 
Tape
Fig. S-1-2
STANDARD NOTES FOR SERVICING
DX-AT50H
– 8 –
With Soldering Iron:
(1) Using desoldering braid, remove the solder from all pins of
the flat pack-IC. When you use solder flux which is applied
to all pins of the flat pack-IC, you can remove it easily.
(Fig. S-1-3)
Flat Pack-IC
Desoldering Braid
Soldering Iron
Fig. S-1-3
(2) Lift each lead of the flat pack-IC upward one by one, using
a sharp pin or wire to which solder will not  adhere (iron
wire). When heating the pins, use a fine tip soldering iron or
a hot air desoldering machine. (Fig. S-1-4)
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4
(3) Bottom of the flat pack-IC is fixed with glue to the CBA;
when removing entire flat pack-IC, first apply soldering iron
to center of the flat pack-IC and heat up. Then remove (glue
will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA using tweezers.
(Fig. S-1-6)
With Iron Wire:
(1) Using desoldering braid, remove the solder from all pins of
the flat pack-IC. When you use solder flux which is applied
to all pins of the flat pack-IC, you can remove it easily.
(Fig. S-1-3)
(2) Affix the wire to a workbench or solid mounting point, as
shown in Fig. S-1-5.
(3) While heating the pins using a fine tip soldering iron or hot
air blower, pull up the wire as the solder melts so as to lift
the IC leads from the CBA contact pads as shown in Fig. S-
1-5.
(4) Bottom of the flat pack-IC is fixed with glue to the CBA;
when removing entire flat pack-IC, first apply soldering iron
to center of the flat pack-IC and heat up.
Then remove (glue will be melted). (Fig. S-1-6)
(5) Release the flat pack-IC from the CBA using tweezers.
(Fig. S-1-6)
Note:
When using a soldering iron, care must be taken to ensure
that the flat pack-IC is not being held by glue. When the flat
pack-IC is removed from the CBA, handle it gently because
it may be damaged if force is applied.
To Solid 
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldeing Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6
– 9 –
DX-AT50H
2. Installation
(1) Using desoldering braid, remove the solder from the foil of
each pin of the flat pack-IC on the CBA so you can install
a replacement flat pack-IC more easily.
(2) The “ ” mark on the flat pack-IC indicates pin 1. (See Fig.
S-1-7.) Be sure this mark matches the 1 on the PCB when
positioning for installation. Then presolder the four corners
of the flat  pack-IC. (See Fig. S-1-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none of the
pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " 
  
 " mark.
Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
Instructions for Handling Semi-conductors
Electrostatic breakdown of the semi-conductors may occur
due to a potential difference caused by electrostatic charge
during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1 Mohm) that is properly
grounded to remove any static electricity that may be charged
on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate with proper
grounding (1 Mohm) on the workbench or other surface, where
the semi-conductors are to be placed. Because the static
electricity charge on clothing will not escape through the body
grounding band, be careful to avoid contacting semi-conductors
with your clothing.
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
< Correct >
1Mohm
1Mohm
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Sharp DX-AT50H (serv.man6) Service Manual / Specification ▷ Download

  • DOWNLOAD Sharp DX-AT50H (serv.man6) Service Manual ↓ Size: 62.68 KB | Pages: 3 in PDF or view online for FREE
  • Here you can View online or download the Service Manual / Specification for the Sharp DX-AT50H (serv.man6) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp DX-AT50H (serv.man6) DVD. Information contained in Sharp DX-AT50H (serv.man6) Service Manual / Specification (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.